Online Free Mock Tests for C# Net

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1. Which of the following is NOT a .NET Exception class?
Exception	StackMemoryException
DivideByZeroException	OutOfMemoryException

2. Which of the following statements is correct about an Exception?
It occurs during compilation	It occurs during linking
It occurs at run-time	It occurs during Just-In-Time compilation

3. In C#.NET if we do not catch the exception thrown at runtime then which of the following will catch it?
Compiler	CLR
Linker	Loader

4. Which of the following is the Object Oriented way of handling run-time errors?
OnError	HERESULT
Exceptions	Error codes

5. Which of the following is NOT a namespace in the .NET Framework Class Library?
System.Process	System.Security
System.Threading	System.Drawing

6. Which of the following statements is correct about a namespace in C#.NET?
Namespaces help us to control the visibility of the elements present in it	A namespace can contain a class but not another namespace
If not mentioned, then the name 'root' gets assigned to the namespace	It is necessary to use the using statement to be able to use an element of a namespace

7. Which of the following is absolutely neccessary to use a class Point present in namespace Graph stored in library?
Use fully qualified name of the Point class	Use using statement before using the Point class
Add Reference of the library before using the Point class	Use using statement before using the Point class

8. C#.NET structures are always value types.
True	False

9. When would a structure variable get destroyed?
When no reference refers to it, it will get garbage collected	Depends upon whether it is created using new or without using new
When it goes out of scope	Depends upon the Project Settings made in Visual Studio.NET

10. Which of the following is NOT an interface declared in System.Collectionsnamespace?
IComparer	Enumerable
Enumerator	IDictionaryComparer

11. Which of the following is the correct way to find out the number of elements currently present in an ArrayList Collection called arr?
arr.Count	arr.GrowSize
arr.MaxIndex	arr.Capacity

12. Which of the following statements is true about an enum used in C#.NET?
An implicit cast is needed to convert from enum type to an integral type	An enum variable cannot have a public access modifier
An enum variable cannot have a private access modifier	An enum variable can be defined inside a class or a namespace

13. Which of the following CANNOT be used as an underlying datatype for an enum in C#.NET?
byte	short
float	int

14. A derived class can stop virtual inheritance by declaring an override as ______.
inherits	extends
inheritable	not inheritable

15. Which one of the following statements is correct?
Array elements can be of integer type only	The rank of an Array is the total number of elements it can contain
The length of an Array is the number of dimensions in the Array	The default value of numeric array elements is zero

16. Which of the following is an 8-byte Integer?
Char	Long
Short	Byte

17. Which of the following is the correct output of the C#.NET code snippet given below? int[ , , ] a = new int[ 3, 2, 3 ]; Console.WriteLine(a.Length);
20	4
18	10

18. What will be the output of the following code snippet when it is executed? int x = 1; floaty = 1.1f; short z = 1; Console.Write.Line((float) x + y * z - (x += (short) y));
0.1	1.0
1.1	11

19. How many values is a function capable of returning?
1	0
Depends upon how many params arguments does it use	Any number of values

20. Which of the following CANNOT occur multiple number of times in a program?
namespace	Entrypoint
Class	Function