C# Basic Interview Questions

.NET Basic Interview Questions

1. What is a IL?
2. What is JIT?
3. What is a CLR?
4. What is a CTS?
5. What is a CLS(Common Language Specification)?
6. What is a Managed Code?
7. What is a  Assembly ?
8. What are different types of Assembly?
9.  What is NameSpace?
10. What is Difference between NameSpace and Assembly?
11.  If you want to view a Assembly how to you go about it ?
12.  What is ILDASM ?
13. What is Manifest?
14. Where is version information stored of a assembly ?
15. Is versioning applicable to private assemblies?
16. What is GAC ?
17. What is concept of strong names ?
18. What is use of SN.EXE ?
19. How do we apply strong names to assembly ?
20.  How do you sign an assembly ?
21. How to add and remove a assembly from GAC?
22.  What is Delay signing ?
23. What is garbage collection?
24.  Can we force garbage collector to run ?
25. What is reflection?
26. What are different type of JIT ?
27.  What are Value types and Reference types ?
28.  What is concept of Boxing and Unboxing ?
29. What’s difference between VB.NET and C# ?
30. What’s difference between System exceptions and Application exceptions?
31. What is CODE Access security?
32. What is a satellite assembly?
33. How to prevent my .NET DLL to be decompiled?
34. What’s the difference between Convert.toString and .toString() method ?
35. What is Native Image Generator (Ngen.exe)?
36. We have two version of the same assembly in GAC?
37.  I want my client to make choice of which assembly to choose?
38. What is CodeDom?

Threading

1. What is Multi-tasking ?
2. What is Multi-threading ?
3. What is a Thread ?
4. Can we have multiple threads in one App domain ?
5.  Which namespace has threading ?
6. Can you explain in brief how can we implement threading ?
7. How can we change priority and what the levels of priority are provided by .NET ?
8. What does Addressof operator do in background ?
9. How can you reference current thread of the method ?
10.  What's Thread.Sleep() in threading ?
11. How can we make a thread sleep for infinite period ?
12. What is Suspend and Resume in Threading ?
13.  What the way to stop a long running thread ?
14. How do i debug thread ?
15. What's Thread.Join() in threading ?
16.  What are Daemon thread's and how can a thread be created as Daemon?
17.  When working with shared data in threading how do you implement synchronization ?
18. Can we use events with threading ?
19. How can we know a state of a thread? What is a monitor object?
20.  What are wait handles ?
21.  What is a mutex object ?
22. what is ManualResetEvent  and AutoResetEvent  ?
23. What is ReaderWriter Locks ?
24. How can you avoid deadlock in threading ?
25.  What’s difference between thread and process?

OOPS

1. What is Object Oriented Programming ?
2. What’s a Class ?
3. What’s a Object ?
4. What’s the relation between Classes and Objects ?
5. What are different properties provided by Object-oriented systems ?
6. Can you explain different properties of Object Oriented Systems?
7.  What’s difference between Association , Aggregation and Inheritance relationships?
8. What are abstract classes ?
9. What’s a Interface ?
10. What is difference between abstract classes and interfaces?
11. What is a delegate ?
12. What are event’s ?
13. Do events have return type ?
14. Can event’s have access modifiers ?
15. Can we have shared events ?
16. What is shadowing ?
17. What’s difference between Shadowing and Overriding ?
18. What’s difference between delegate and events?
19. If we inherit a class do the private variables also get inherited ?
20. What are different accessibility levels defined in .NET ?
21. Can you prevent a class from overriding ?
22. What’s the difference between Class and structure’s ?
23. What does virtual keyword mean ?
24. What are shared (VB.NET)/Static(C#) variables?
25. What is Dispose method in .NET ?
26. Whats the use of “OverRides” and “Overridable” keywords ?
27.  Where are all .NET  Collection classes located ?
28. What is ArrayList ?
29. What’s a HashTable ?
30. What’s difference between HashTable and ArrayList ?
31. What are queues and stacks ?
32. What is ENUM ?
33.  What is nested Classes ?
34. What’s Operator Overloading in .NET?
35. Can we have different access modifiers on get/set methods of a property ?
36. If we write a goto  or a return statement in try and catch block will the finally block execute ?
37.  What is Indexer ? Can we have static indexer in C# ?
38.  In a program there are multiple catch blocks so can it happen that two catch blocks are executed ?
39. What is the difference between System.String and System.StringBuilder classes?