Online C# Programming Test - C# Programming Test 1

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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Which of the following utilities can be used to compile managed assemblies into processor-specific native code?

gacutil

ngen

dumpbin

ildasm

[#]

Which of the following are value types?

Integer
Array
Single
String
Long

1, 2, 5

1, 3, 5

2, 4

3, 5

[#]

Which of the following are the correct way to initialise the variables i and j to a value 10 each?

```
int i = 10; int j = 10;
```
```
int i, j;
i = 10 : j = 10;
```
```
int i = 10, j = 10;
```
```
int i, j = 10;
```
```
int i = j = 10;
```

2, 4

1, 3

3, 5

4, 5

[#]

What is the output of the C#.NET code snippet given below?

namespace IndiabixConsoleApplication
{
    public enum color
    { red, green, blue };
    
    class SampleProgram
    {
        static void Main (string[ ] args)
        {
            color c = color.blue;
            switch (c)
            {
                case color.red:
                    Console.WriteLine(color.red); 
                    break; 
                
                case color.green: 
                    Console.WriteLine(color.green); 
                    break; 
                
                case color.blue: 
                    Console.WriteLine(color.blue); 
                    break; 
            } 
        } 
    } 
}

red

blue

[#]

What will be the output of the C#.NET code snippet given below?

int i = 2, j = i;
if (Convert.ToBoolean((i | j & 5) & (j - 25 * 1)))
    Console.WriteLine(1); 
else
    Console.WriteLine(0);

Compile Error

Run time Error

[#]

In which of the following should the methods of a class differ if they are to be treated as overloaded methods?

Type of arguments
Return type of methods
Number of arguments
Names of methods
Order of arguments

2, 4

3, 5

1, 3, 5

3, 4, 5

[#]

Assume class B is inherited from class A. Which of the following statements is correct about construction of an object of class B?

While creating the object firstly the constructor of class B will be called followed by constructor of class A.

While creating the object firstly the constructor of class A will be called followed by constructor of class B.

The constructor of only class B will be called.

The constructor of only class A will be called.

The order of calling constructors depends upon whether constructors in class A and class B are private or public.

[#]

How can you prevent inheritance from a class in C#.NET ?

Declare the class as shadows.

Declare the class as overloads.

Declare the class as sealed.

Declare the class as suppress.

Declare the class as override.

[#]

If s1 and s2 are references to two strings then which of the following are the correct ways to find whether the contents of the two strings are equal?

```
if(s1 = s2)
```
```
if(s1 == s2)
```
```
int c;
c = s1.CompareTo(s2);
```
```
if( strcmp(s1, s2) )
```
```
if (s1 is s2)
```

1, 2

2, 3

4, 5

3, 5

[#]

10.

Which of the following statements are correct about delegates?

Delegates cannot be used to call a static method of a class.

Delegates cannot be used to call procedures that receive variable number of arguments.

If signatures of two methods are same they can be called through the same delegate object.

Delegates cannot be used to call an instance function. Delegates cannot be used to call an instance subroutine.

[#]

11.

Which of the following forms of applying an attribute is correct?

< Serializable() > class sample
{ /* ... */ }

(Serializable()) class sample
{ /* ... */ }

[ Serializable() ] class sample
{ /* ... */ }

Serializablef) class sample
{ /* ... */ }

None of the above

[#]

12.

Once applied which of the following CANNOT inspect the applied attribute?

CLR

Linker

ASP.NET Runtime

Visual Studio.NET

Language compilers

[#]

13.

Which of the following is the correct output for the C#.NET code snippet given below?

enum color: int
{ 
    red,
    green, 
    blue = 5, 
    cyan,
    magenta = 10, 
    yellow 
}
Console.Write( (int) color.green + ", " ); 
Console.Write( (int) color.yellow );

2, 11

1, 11

2, 6

1, 5

None of the above

[#]

14.

A Student class has a property called rollNo and stu is a reference to a Student object and we want the statement stu.RollNo = 28 to fail. Which of the following options will ensure this functionality?

Declare rollNo property with both get and set accessors.

Declare rollNo property with only set accessor.

Declare rollNo property with get, set and normal accessors.

Declare rollNo property with only get accessor.

None of the above

[#]

15.

Which of the following is the correct way to implement a read only property Length in a Sample class?

class Sample
{
    int len;
    public int Length
    {
        get
        {
            return len;
        } 
    } 
}

class Sample
{
    public int Length
    {
        get
        {
            return Length;
        } 
    } 
}

class Sample
{
    int len;
    public int Length
    {
        get
        {
            return len;
        } 
        set
        {
            len = value;
        } 
    } 
}

class Sample
{
    int len;
    public int Length
    {
        Readonly get
        {
            return len;
        } 
    } 
}

[#]

16.

If a namespace is present in a library then which of the following is the correct way to use the elements of the namespace?

Add Reference of the namespace.
Use the elements of the namespace.

Add Reference of the namespace.
Import the namespace.
Use the elements of the namespace.

Import the namespace.
Use the elements of the namespace.

Copy the library in the same directory as the project that is trying to use it.
Use the elements of the namespace.

Install the namespace in Global Assembly Cache.
Use the elements of the namespace.

[#]

17.

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

Operating system

[#]

18.

Which of the following statements are correct about exception handling in C#.NET?

try blocks cannot be nested.
In one function, there can be only one try block.
An exception must be caught in the same function in which it is thrown.
All values set up in the exception object are available in the catch block.
While throwing a user-defined exception multiple values can be set in the exception, object.

1 only

1 and 2 only

3 only

4 and 5 only

All of the above

[#]

19.

All code inside finally block is guaranteed to execute irrespective of whether an exception occurs in the protected block or not.

True

False

[#]

20.

Which of the following unary operators can be overloaded?

true
false
+
new
is

1, 2, 3

3, 4, 5

3 only

5 only

[#]

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