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ASP.NET Page Life Cycle

Clear understanding of ASP.NET Page life cycle
http://blogs.crsw.com/mark/articles/471.aspx

1. Constructor()
2. AddParsedSubObject()
3. DeterminePostBack()
4. OnInit()
5. LoadPageFromPersistenceMedium()
6. LoadViewState()
7. ProcessPostData()
8. OnLoad()
9. ProcessPostData()
10. RaiseChangedEvents()
11. RaisePostBackEvent()
12. OnPrerender()
13. SaveViewState()
14. SaveViewStatetoPersistenceMedium()
15. OnPrerender()
16. Render()
17. Dispose()

Few more general questions in .NET

All these questions are taken from http://blogs.crsw.com/mark/articles/252.aspx

• CCW : Com Callable wrapper.
• RCW : RUN time callable wrapper.
• foo.gettype() ,Gettype(foo)
• ASP . Interprepter.. use the script engine but ASP.Net Compiled
• Microsoft Intermeidate lanaguage. which is the out put for all the .net supported languages after comiplation will produce. Appreciation for cross language support.
• What base class do all Web Forms inherit from? System.Web.UI.Page
• malloc, alloc, release
• ASP.NET is a technology that provides a framework for developing .NET based web applications.
• ASP.NET is not a platform independen language. ASP.NET is more of a technology that provides a framework for building web applications. ASP.NET provides the reources needed to dynamically deliver html content (pages) to the end user. ASP.NET can leverage languages such as C#, VB.NET, and javascript to help provide a reliable, high perfofmance, and secure web application.
• .net framework is independent because msil is independent can be run anywhere. but it is platform dependent because msil wil be converted to native code which is understandable by windows.
• What is serialization, how it works in .NET?
• What should one do to make class serializable?
• What exactly is being serialized when you perform serialization?
• scope in C#
• The primary purpose of XML serialization in the .NET Framework is to enable the conversion of XML documents and streams to common language runtime objects and vice versa. Serialization of XML to common language runtime objects enables one to convert XML documents into a form where they are easier to process using conventional programming languages. On the other hand, serialization of objects to XML facilitates persisting or transporting the state of such objects in an open, standards compliant and platform agnostic manner.
• Serialization is the process of converting an object or a con-nected graph of objects into a contiguous stream of bytes. Deserialization is the process of converting a contiguous stream of bytes back into its graph of connected objects. The ability to convert objects to and from a byte stream is an incredibly useful mechanism. Here are some examples:
• An application's state (object graph) can easily be saved in a disk file or database and then restored the next time the application is run. ASP.NET saves and restores session state by way of serialization and deserialization.
• A set of objects can easily be copied to the system's clipboard and then pasted into the same or another application. In fact, Windows® Forms uses this procedure. • A set of objects can be cloned and set aside as a backup while a user manipulates the main set of objects.
• A set of objects can easily be sent over the network to a process running on another machine. The Microsoft® .NET Framework remoting architecture serializes and deserializes objects that are marshaled by value. Why would you want to use serialization? The two most important reasons are to persist the state of an object to a storage medium so an exact copy can be recreated at a later stage, and to send the object by value from one application domain to another.
• Static methods
• copyto method makes a deep copy and clone method makes a shallow copy
• What is web garden?
• What is object pooling?
• Tell some thing about IIS isolation levels.
• Dispose is the method, which we call usually when we want the object to be garbage collected. If u r calling Dispose() on inbuilt classes like Form, It'll call a method Finalize() method, which will usually used to cleanup any resources used with in the form. With in this Finalize method, we call the garbage collector to recycle the memory. So, when u r using dispose method, it is used to mark the object to Garbage Collectable. Calling the Dispose dose't means, that object will b garbage collected immidiately. GC will monitor the Managed memory for objects Marked 4 garbage collectable. The recycling of memory depends on when the GC will pay the visit. Purely the Dispose method is not used for reseting the values in the object. It is used to mark the Object to b collected by the GC
• What are the different types of assemblies – name them?Private Public/Shared Satellite assembly
• This Global Assembly Cache(GAC) stores .NET assemblies to be shared by several applications on that computer.
• How many ways can we maintain the state of a page? 1.Client Side [ Query string, hidden variables, view state,cookies] 2.Server side [application , session, database]
• What is the purpose of a private constructor? [Rama Naresh Talluri] Prevent the creation of instance for a class
• Differentiate Dispose and Finalize. [Rama Naresh Talluri] Finalize is called by the Garbage Collector, and the state of manage objects cannot be guaranteed, so we can not reference them. Also, we cannot determine when the GC will run, and which objects it will Finalize. Dispose is called by the programmer, and is used to dispose of managed and unmanaged objects. Within we dispose method, we release all of our resources and call GC.SuppressFinalize as we have done the work of the GC.
• What is the purpose of Singleton pattern? [Rama Naresh Talluri] Singleton pattern is used to make sure that only one instance of a given class exists.
• What is the difference between well formed and valid xml document ?
• 1. Explain about Normalization?
• 2. What is the difference between union & union all?
• 3. What kind of transactions can handled?
• 4. temporay tables use & how we can manage?
• 5. perfomance tuning steps? 6. Difference btn method overload / override?
• 7. When Garbage collector come into picture?
• 8. Difference btn refernce & value types?
• 9. boxing / unboxing in ASP.NET
• 10. assemblies
• 11. What manifest file contains?
• 12. MSIL
• 13. JIT
• 14. clas vs module
• 15. dataadapter
• 16. dataset
• 17. ado.net objects
• 18. difference btn and, and also
• 19. dataset.copy & dataset.clone
• 20. code access security
• 21. finalization
• 22. strogn type dataset

Excellent Questions

Net topics

1. Define what is meant by the term “data structure”?

A data structure is an abstract struct or class that is used to organize info and provide various manipulations on their enclosed data. The most common data structure would be array, but there are many well-known structures in .NET including hashtables, queues, and other collection classes (even custom) that can be made into Binary Search Trees and other usable data structures for the specific programming problem at hand.

2. What is MSIL (Microsoft Intermediate Language) and how is it generated? MSIL is machine-independant code (similar to java bytecode in and ASM sort of way…) that describes instructions of a program. The main purpose of MSIL is to run implementations of the programs defined metadata (which is stored in an assembly with the specific AppDomain) so that the CLR can utilize this ‘bluprint’ and bring a program to life. Metadata and MSIL is generated by a compiler, and can be inspected through ILDASM or .NET Reflector (third-party free program). For example csc.exe is the compiler for CSharp code.

3. What is Garbage Collection?

Garbage Collection is a hassle-free way to free up assigned memory spaces during the runtime execution of a managed code program. By using Garbage Collection (in a enhanced implementation than Java does..) we can write managed code programs without worrying about the number of objects we are instantiated at runtime or the proper disposal of those objects. The Garbage collector will determine when the object is no longer going to be used within a programs execution, and will flag it for ‘pickup’, however pickup does not actually occur until additional memory is needed by the program, and hence garbage collection can occur randomly throughout the execution lifetime. You can equate and think about this in terms of the benefits of being able to program against heap memory versus stack memory. The awesome thing about GC is that it frees us from worries of dangling pointers, circular references, or memory leaks (and blue screens).

4. What is Serialization? What 2 formats does dot net provide?

Serialization is a means in which to take and object, and be able to map its structure or class graph into a stream. The purpose of which normally is to transfer that object to another location, or persist custom obejects to some form of storage. .NET provides two main implementation classes for serialization.. the XML Soap Formatter and the BinaryFormatter class. You must implement the IFormatter interface to actually write out to these streams using the Serialize or Deserialize methods, and you can mark classes unserializable or serializable using Attributes in your code.

5. What is the GAC (Global Assembly Cache) used for?

The GAC is a shared ‘dumpsite’ for assemblies you wish to strong-name and share across multiple app domains. This is a great way to shared common components (like rich-text box controls or custom mail classes). The GAC is used for this data store component sharing ability, as well as for storing code downloaded from the internet (in a private portion of the cache), and for storing native code versions of pre-JIT assemblies.

5. Is a String a value or reference type? What is the difference between the two? A String in .NET is an immutable object comprised of char objects. Since these objects last as constant throughout their instantiated lifetime (hence are immutable) they are treated as value types. Value types are usually simple types such as integers, floats, and other objects as opposed to user-defined types such as a customer object in a customers class. The major difference between value and reference types are how they are treated in allocated memory… value types are copied in memory and reference types are usually shallow-copied, basically a memory pointer of sorts points (or references) the memory address of the original object. Most reference types are shallow-copied unless specifically coded for a deep-copy implementation (as may be required in late-binding scenarios). The .NET framework takes care of most boxing and unboxing of types as required. In a value type, what the called method does with the incoming parameter doesn’t affect the variable passed down from the calling method. With a reference type, when the called method makes changes to the data through the reference, the changes are made to the original data.

C#

1. What are the as and is keywords used for?

‘is’ is used to check if an object is compatible with a given type against its run-time type, and ‘as’ is used to perform conversions between compatible types. The ‘as’ operator is used in an expression form, like “expression as type’

2. What is the using keyword used for?

Using is similar to the Java imports directive, which allows us to reference a namespace.. This allows us to refer to members of that namespace, without having to utilize its fully-qualified name. For example, if I want to use regular expressions features, I should add a using directive in order to access members of that namespace without their FQN. “using System.Text.RegularExpressions;” The keyword ‘using’ is overloaded however, and can be used as a statement for an object that wants to implement IDisposable.

3. What is the out and ref keyword used for in functions and how do they differ?

The out keyword is used for parameters assigned within the called method, and passed by reference back out of that called method.. the ref keyword is for parameters assigned prior to the call to that particular method (functions should be referred to as methods in .NET by the way…) and the parameter is being passed by reference, not by-value.

4. What is a delegate?

A delegate is a type that defines a methods signature so the delegate can hold and invoke a method of that same signature.. In the term of Chess pieces.. a delegate would be akin to a King’s Bishop.. who could hold or act on the King’s orders. Delegates are powerful mechanisms for the event model of .NET, and allows us to multicast delegates… that is allow us to raise multiple events or notify multiple delegates of an event, or event to raise events sequentially.

5. What is the difference between a struct and a class?

A struct (or structure) is lightweight compared to all the features of a class, basically because it is a value type, wherin a class is a reference type. We usually use structures for desirable semantics such when we want an assignment to copy a value rather than a reference.. Classes can have destructors, which structs cannot have, and classes can have parameterless constructors.. which structs cannot have. Stucts are sealed classes, but can implement interfaces like classes can.

Object Oriented Design principles

1. What is method overloading and method overriding?

Overloading a method generally refers to creating multiple signatures of that method, allowing us to call that method with differentiating parameters in order to run a differentiating operation. For example, a engine class might have one method for start() intended for a gasoline engine, and another method of start(nGlowPlugTime) meant for a diesel engine. In such case, the start() method would be overloaded. Overriding a method is when we want to take a base class definition of a method, and change the implementation details of that method in the derived class by rewriting it to suit our specifications. Essentially this goes hand-in-hand with the virtual and override keywords in .NET We can override abstract, virtual or override declared methods, but we could not override sealed classes for example.

2. Describe two uses of the new keyword in .NET.

The new operator is most often used to instantiate a new instance of an object (create new memory allocation on the heap and invoke constructors for that object). New can also be used as a modifier, in order to explicitly hide a derived class member from the base class… Such a implementation would look like new public void Start()

3. What is the difference between interfaces and inheritance?

Wow.. great question.. hehe… inheritance usually in .NET is thought of as a single-inheritance model, not multiple.. so for example my child could inherit my bad habits, but not both my own and my wife’s bad habits (We would have to override all those bad habits anyway..) interfaces are contracts that programmers should implement (in fact, they must implement) when creating a class. My best analogy for an interface is a standard Universal TV Remote Control.. although it can turn on any television, the actual implementation of that particular IR signal is dependent on the make/model of the TV you are trying to turn on.. hence the “ON” would be exposed as an interface… surely you would have to implement this interface in order to actually get the thing to really work. However interfaces can be utilized to get to a sort-of pseudo multiple inheritance model if utilized correctly and in written in proper fashion.

4. What is an abstract data type? How is one defined in C#? Abstract methods provide no actual implementation details, and an abstract data type, or abstract property, behave similar. An abstract inherited property could be overridden and implemented in a derived class by declaring that property with the override modifier. We define it in C# with the abstract modifier. Abstract data types are implicitly virtual, and hence could not be static members (static members are when a single instantiated object is constant throughout the application..)

5. What is polymorphism used for? Polymorphism is best described as multiple uses for a particular object. If I were to create a 35 in 1 tool for example, that particular tool has 35 polymorphic uses. Each of those uses could require a specific implementation (or contract) in order to achieve the desired results. For example, the Draw() method for shapes is polymorphic, depending on whether I would draw a circle, square, polyhedron, etc.. the method could indeed be used, hence it would need polymorphism. True polymorphism is generally a multiple-inheritance model, and hence you would need to turn to interfaces to achieve the desired results as opposed to simple inheritance which could be achieved by overloading the methods.

Databases T-SQL

1. What is the difference between HAVING and WHERE clauses? Having behaves like a where clause when improperly used, that is having should be used in a SELECT statement with a GROUP BY clause. WHERE is used to restrict the results returned, wherin having should be used to group results or restrict results by aggregate.

2. What is the difference between TRUNCATE and DELETE? I am a big fan of TRUNCATE… especially with MySQL, but it essentially is the same in SQLServer… it removes all the rows of a table without logging the individual deletions.. and it doesn’t have any WHERE clauses in its usage.. hence it is generally less resource-intensive, and surely faster than, DELETE. DELETE walks through all the rows one-by-one, yet truncate just deallocates the data pages used, usually with less locks on the database table.

3. What is an index? An index can be created on tables and views, and is like an index of a book, it lets the database quickly find the data it is indeed looking for in response to the given query. It contains keys that relate to storage locations of the individual data contained within columns for which the index is defined. Indexes open up critical database considerations in speed and execution and are best left to experienced DBA’s who understand the ramifications of the index, for example, indexing small tables or having a large number of indexes on a table could drastically affect performance.

4. What is a clustered and non-clustered index? A clustered index is one in which the logical order of the keys in the index equates to the physical order of the data rows in the DB. An indexed view is actually a clustered index that is unique for example. A clustered index needs to be explicitly created, generally before any nonclustered indexes. With nonclustered indexes, their physical order is independent of the index keys, and this is the default implementation of indexes.

5. What is an instead of trigger? A instead of trigger specifies it will be executed in replecement of the triggering SQL statement. In SLQ 2005, we can execute DDL triggers on DB schema, but instead of cannot be executed on DDL queries, only on DML T-SQL… and there can only be one instead-of instance per INSERT, UPDATE or DELETE. In addition, we could not replace the SQL statements in a DELETE with a cascade action, hence instead of would not be allowed in such a situation.

6. Given a table named User having a single nullable column named UserName, what is the SQL statement that will return a result set that contains the total number of non-NULL UserName? SELECT COUNT(ALL UserName) FROM User

ASP.Net

1. What is viewstate and where is it stored by default?

The viewstate is a page-level state preservation mechanism, most-often used between postbacks to persist the state of controls on the page. It is stored in encrypted hidden fields on the page (__VIEWSTATE__). There are multiple Page declaration attributed that can be used for the viewstate, including turning it on or off, encrypting it, allowing viewstate to persist for example on Server.Transfer requests, etc. It is a great lightweight persistence mechanism, but for pages that never change control state, or pages with very large data-intensive result sets.. the viewstate is best not employed.

2. What does the SmartNavigation page directive do? It doesn’t do anything anymore.. its deprecated… But what it had done in the past, is allow asp.net to return to the same control area on the page during a postback, to prevent users from scrolling again to a particular region of the page. It utilized a feature buit-in to IE5 that would remember the element focus and scroll position on a page. You will now see many SmartNavigation warnings in your VisualStudio error box on building older code on the new ASP.NET 2.0 framework about it’s deprecation.

3. What interface(s) do I need to implement when designing custom web controls that raises servers-side events? I believe you would have to implement the IDispose interface for sure to clean up after the page is unloaded, and perform any other final cleanup work. Usually custom server-side controls are developed to encapsulate reusable code so that a html tag can be dropped into a page and that custom control is brought to life (like a custom Web grid, etc.) By encapsulating the functionality we could respond to events and set the control properties, hence there should be a mechanism that ensures a custom-control is cleaning up after itself.. o IDispose would certainly fit the bill.

4. What are the 3 authentication types that ASP.Net supports?

The most common authentication method is Forms based authentication, followed by Windows-based authentication, and finally Passport authentication.. the former of which is under revision into the new Windows Live features and service set.. There is a fourth type of authentication really, that is NO authentication, which would rely on the inherit capabilities of IIS, or perhaps a custom-built http module that would run before the asp.net module is hit.. Custom modules would be extremely ineffective in a shared web farm situation for example, which would benefit from authenticating users under a centralized user credential service such as Microsoft Passport offers.

5. Between which page life cycles stages is the viewstate loaded?

The viewstate is loaded between the InitComplete event and Page_Load events.. in ASP.NET 1.x, you must wait for the Load event to start to safely write to any control viewstate. Ulitmately, the StateBag class of the framework is responsible for the viewstate that manages information, and it works like a dictionary collection class, allowing you to get and set data as appropriate.

ESRI Interview Questions

After grilling 8 interviews from 9am to 5pm, i was completely exhausted.
Here a few questions, I remember....

• What is GAC
• How to deploy an assembly
• Exception handling(multiple catch statements)
• Life cycle of a thread in java, web service
• Difference between jsps and servlets
• what is ngen.exe ?
• dll hell?
• What is CLR?
• XML and XPath
• Ajax

Excellent C# interview questions

Here is a link to excellent interview questions list......
Dont be suprised, if you see the same questions on the interview.....
http://blogs.crsw.com/mark/articles/252.aspx

Scotts Questions.....

All the questions below are from :
http://www.hanselman.com/blog/WhatGreatNETDevelopersOughtToKnowMoreNETInterviewQuestions.aspx

What Great .NET Developers Ought To Know

Everyone who writes code

Describe the difference between a Thread and a Process?
What is a Windows Service and how does its lifecycle differ from a "standard" EXE?
What is the maximum amount of memory any single process on Windows can address? Is this different than the maximum virtual memory for the system? How would this affect a system design?
What is the difference between an EXE and a DLL?
What is strong-typing versus weak-typing? Which is preferred? Why?
Corillian's product is a "Component Container." Name at least 3 component containers that ship now with the Windows Server Family.
What is a PID? How is it useful when troubleshooting a system?
How many processes can listen on a single TCP/IP port?
What is the GAC? What problem does it solve?

Mid-Level .NET Developer

Describe the difference between Interface-oriented, Object-oriented and Aspect-oriented programming.
Describe what an Interface is and how it’s different from a Class.
What is Reflection?
What is the difference between XML Web Services using ASMX and .NET Remoting using SOAP?
Are the type system represented by XmlSchema and the CLS isomorphic?
Conceptually, what is the difference between early-binding and late-binding?
Is using Assembly.Load a static reference or dynamic reference?
When would using Assembly.LoadFrom or Assembly.LoadFile be appropriate?
What is an Asssembly Qualified Name? Is it a filename? How is it different?
Is this valid? Assembly.Load("foo.dll");
How is a strongly-named assembly different from one that isn’t strongly-named?
Can DateTimes be null?
What is the JIT? What is NGEN? What are limitations and benefits of each?
How does the generational garbage collector in the .NET CLR manage object lifetime? What is non-deterministic finalization?
What is the difference between Finalize() and Dispose()?
How is the using() pattern useful? What is IDisposable? How does it support deterministic finalization?
What does this useful command line do? tasklist /m "mscor*"
What is the difference between in-proc and out-of-proc?
What technology enables out-of-proc communication in .NET?
When you’re running a component within ASP.NET, what process is it running within on Windows XP? Windows 2000? Windows 2003?

Senior Developers/Architects

What’s wrong with a line like this? DateTime.Parse(myString);
What are PDBs? Where must they be located for debugging to work?
What is cyclomatic complexity and why is it important?
Write a standard lock() plus “double check” to create a critical section around a variable access.
What is FullTrust? Do GAC’ed assemblies have FullTrust?
What benefit does your code receive if you decorate it with attributes demanding specific Security permissions?
What does this do? gacutil /l find /i "Corillian"
What does this do? sn -t foo.dll
What ports must be open for DCOM over a firewall? What is the purpose of Port 135?
Contrast OOP and SOA. What are tenets of each?
How does the XmlSerializer work? What ACL permissions does a process using it require?
Why is catch(Exception) almost always a bad idea?
What is the difference between Debug.Write and Trace.Write? When should each be used?
What is the difference between a Debug and Release build? Is there a significant speed difference? Why or why not?
Does JITting occur per-assembly or per-method? How does this affect the working set?
Contrast the use of an abstract base class against an interface?
What is the difference between a.Equals(b) and a == b?
In the context of a comparison, what is object identity versus object equivalence?
How would one do a deep copy in .NET?
Explain current thinking around IClonable.
What is boxing?
Is string a value type or a reference type?
What is the significance of the "PropertySpecified" pattern used by the XmlSerializer? What problem does it attempt to solve?
Why are out parameters a bad idea in .NET? Are they?
Can attributes be placed on specific parameters to a method? Why is this useful?

C# Component Developers

Juxtapose the use of override with new. What is shadowing?
Explain the use of virtual, sealed, override, and abstract.
Explain the importance and use of each component of this string: Foo.Bar, Version=2.0.205.0, Culture=neutral, PublicKeyToken=593777ae2d274679d
Explain the differences between public, protected, private and internal.
What benefit do you get from using a Primary Interop Assembly (PIA)?
By what mechanism does NUnit know what methods to test?
What is the difference between: catch(Exception e){throw e;} and catch(Exception e){throw;}
What is the difference between typeof(foo) and myFoo.GetType()?
Explain what’s happening in the first constructor: public class c{ public c(string a) : this() {;}; public c() {;} } How is this construct useful?
What is this? Can this be used within a static method?

ASP.NET (UI) Developers

Describe how a browser-based Form POST becomes a Server-Side event like Button1_OnClick.
What is a PostBack?
What is ViewState? How is it encoded? Is it encrypted? Who uses ViewState?
What is the element and what two ASP.NET technologies is it used for?
What three Session State providers are available in ASP.NET 1.1? What are the pros and cons of each?
What is Web Gardening? How would using it affect a design?
Given one ASP.NET application, how many application objects does it have on a single proc box? A dual? A dual with Web Gardening enabled? How would this affect a design?
Are threads reused in ASP.NET between reqeusts? Does every HttpRequest get its own thread? Should you use Thread Local storage with ASP.NET?
Is the [ThreadStatic] attribute useful in ASP.NET? Are there side effects? Good or bad?
Give an example of how using an HttpHandler could simplify an existing design that serves Check Images from an .aspx page.
What kinds of events can an HttpModule subscribe to? What influence can they have on an implementation? What can be done without recompiling the ASP.NET Application?
Describe ways to present an arbitrary endpoint (URL) and route requests to that endpoint to ASP.NET.
Explain how cookies work. Give an example of Cookie abuse.
Explain the importance of HttpRequest.ValidateInput()?
What kind of data is passed via HTTP Headers?
Juxtapose the HTTP verbs GET and POST. What is HEAD?
Name and describe at least a half dozen HTTP Status Codes and what they express to the requesting client.
How does if-not-modified-since work? How can it be programmatically implemented with ASP.NET?Explain <@OutputCache%> and the usage of VaryByParam, VaryByHeader.
How does VaryByCustom work?
How would one implement ASP.NET HTML output caching, caching outgoing versions of pages generated via all values of q= except where q=5 (as in http://localhost/page.aspx?q=5)?

Developers using XML

What is the purpose of XML Namespaces?
When is the DOM appropriate for use? When is it not? Are there size limitations?
What is the WS-I Basic Profile and why is it important?
Write a small XML document that uses a default namespace and a qualified (prefixed) namespace. Include elements from both namespace.
What is the one fundamental difference between Elements and Attributes?
What is the difference between Well-Formed XML and Valid XML?
How would you validate XML using .NET?
Why is this almost always a bad idea? When is it a good idea? myXmlDocument.SelectNodes("//mynode");
Describe the difference between pull-style parsers (XmlReader) and eventing-readers (Sax)
What is the difference between XPathDocument and XmlDocument? Describe situations where one should be used over the other.
What is the difference between an XML "Fragment" and an XML "Document."
What does it meant to say “the canonical” form of XML?
Why is the XML InfoSet specification different from the Xml DOM? What does the InfoSet attempt to solve?
Contrast DTDs versus XSDs. What are their similarities and differences? Which is preferred and why?
Does System.Xml support DTDs? How?
Can any XML Schema be represented as an object graph? Vice versa?

ASP.NET

• Describe the difference between a Thread and a Process?
• What is a Windows Service and how does its lifecycle differ from a “standard” EXE?
• What is the maximum amount of memory any single process on Windows can address? Is this different than the maximum virtual memory for the system? How would this affect a system design?
• What is the difference between an EXE and a DLL?
• What is strong-typing versus weak-typing? Which is preferred? Why?
• What’s wrong with a line like this? DateTime.Parse(myString
• What are PDBs? Where must they be located for debugging to work?
• What is cyclomatic complexity and why is it important?
• Write a standard lock() plus double check to create a critical section around a variable access.
• What is FullTrust? Do GAC’ed assemblies have FullTrust?
• What benefit does your code receive if you decorate it with attributes demanding specific Security permissions?
• What does this do? gacutil /l find /i “about”
• What does this do? sn -t foo.dll
• What ports must be open for DCOM over a firewall? What is the purpose of Port 135?
  Contrast OOP and SOA. What are tenets of each
• How does the XmlSerializer work? What ACL permissions does a process using it require?
• Why is catch(Exception) almost always a bad idea?
• What is the difference between Debug.Write and Trace.Write? When should each be used?
• What is the difference between a Debug and Release build? Is there a significant speed difference? Why or why not?
• Does JITting occur per-assembly or per-method? How does this affect the working set?
• Contrast the use of an abstract base class against an interface?
• What is the difference between a.Equals(b) and a == b?
• In the context of a comparison, what is object identity versus object equivalence?
• How would one do a deep copy in .NET?
• Explain current thinking around IClonable.
• What is boxing?
• Is string a value type or a reference type?

The following questions are taken from the link below

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http://www.pkblogs.com/basittanveer/2006/05/aspnet-interview-questions.html

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1. What is the difference between encoding and encryption? Which is easy to break? Can we disable the view state application wide? can we disable it on page wide? can we disable it for a control?

Ans: encoding is easy to break, we can disable it page wide and control level.

2. Can you read the View State? Disadvantage of a view state. ( asked to me in IFLEX Solutions)

Ans: Yes we can read the view state since it is encoded using base64 string, so it is easy to break it, we also have view state decoders ( http://www.pluralsight.com/toolcontent/ViewStateDecoder21.zip)

3. What is provider Model? (asked to me in mindlogicx , salsoft)

Ans: Provider model means that microsoft has provided a set of interfaces, a new vendor just needs to implement them and write the functionality for their software to work with MS. example SQL provider model, ODBC provider model, MySQL proviuder model.

4. Any idea of Enterprise library?

http://www.dotnetjunkies.com/Article/29EF3A4F-A0C2-4BB2-A215-8F87F100A9F9.dcik

5. Can we have multiple web.config files in a sigle web project? ( asked to me in IFLEX Solutions, salsoft)

Ans: Yes we can have them for each sub folders in the web project main folder.

6. Can we have more then one configuration file?

Ans: yes

7. What is the difference between syncronus and asyncronus?

Ans: syncronus means you are waiting for the responce to come back, while in the asyncronus you start with the next staement and whenever the results come back a call back function is called.

8. Difference between http and https? what is purpose of aspnet_wp.exe ? what is an ISAPI filter? what do you mean by HTTP Handler?

Ans: https means it is using SSL, aspnet_wp is the worker process that handles all the asp net requests, ISAPI filter helps the iis in identifying the request type and forwarding it to the appropriate handler.

9. what is side by side execution?

Ans: It means that we can have two dot net version running on the same server machine, and the application build in asp.net 1.1 will be server by dot net framework 1.1 and the applications build in asp.net 2.0 will be server by dot net framework 2.0.

10. can we have two different versions of dot net frameworks running on the same machine?

Ans: yes

11. Can we have an updateable view in SQL?

Ans: Yes

12. What is the difference between typed and untyped dataset?

Ans: typed data set contains the inforation of the db/table structure

iLand Diary Page

chek out the link to new poster of superman....
iLand Diary Page

DataList Events

• A DataListItem instance is created.
• The proper template is used to render the contents of the DataListItem. It's at this point that the DataList's SelectedIndex is checked to see whether the ItemTemplate should be used or if the SelectedItemTemplate should be used.
• The DataList's ItemCreated event is raised.
• The DataListItem's DataItem property is set to the current DataSource row, and the DataListItem's DataBind() method is called.
• The DataList's ItemDataBound event is raised.

MS SQL Server questions

Here is a link to good sql server questions.....
MS SQL Server interview questions <>