Online C# Programming Test - C# Programming Test 9

Instruction:

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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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All the best!

Which of the following constitutes the .NET Framework?

ASP.NET Applications
CLR
Framework Class Library
WinForm Applications
Windows Services

1, 2

2, 3

3, 4

2, 5

[#]

Which of the following statements are correct about the C#.NET code snippet given below?

if (age > 18 && no < 11)
    a = 25;

The condition no < 11 will be evaluated only if age > 18 evaluates to True.
The statement a = 25 will get executed if any one condition is True.
The condition no < 11 will be evaluated only if age > 18 evaluates to False.
The statement a = 25 will get executed if both the conditions are True.
&& is known as a short circuiting logical operator.

1, 3

2, 5

1, 4, 5

3, 4, 5

None of these

[#]

How many values is a function capable of returning?

Depends upon how many params arguments does it use.

Any number of values.

Depends upon how many ref arguments does it use.

[#]

Which of the following will be the correct output for the C#.NET program given below?

namespace IndiabixConsoleApplication
{ 
    class SampleProgram
    { 
        static void Main(string[] args)
        {
            int a = 5; 
            int s = 0, c = 0;
            Proc(a, ref s, ref c);
            Console.WriteLine(s + " " + c);
        }
        static void Proc(int x, ref int ss, ref int cc)
        {
            ss = x * x;
            cc = x * x * x;
        } 
    } 
}

0 0

25 25

125 125

25 125

None of the above

[#]

Which of the following statements is correct about the C#.NET code snippet given below?

class Sample
{
    private int i;
    public Single j;
    private void DisplayData()
    {
        Console.WriteLine(i + " " + j);
    }
    public void ShowData()
    {
        Console.WriteLine(i + " " + j);
    }
}

j cannot be declared as public.

DisplayData() cannot be declared as private.

DisplayData() cannot access j.

ShowData() cannot access to i.

There is no error in this class.

[#]

What will be the size of the object created by the following C#.NET code snippet?

namespace IndiabixConsoleApplication
{ 
    class Baseclass
    {
        private int i; 
        protected int j; 
        public int k;
    }
    class Derived: Baseclass
    {
        private int x; 
        protected int y; 
        public int z;
    }
    class MyProgram
    { 
        static void Main (string[ ] args)
        { 
            Derived d = new Derived();
        } 
    } 
}

24 bytes

12 bytes

20 bytes

10 bytes

16 bytes

[#]

In an inheritance chain which of the following members of base class are accessible to the derived class members?

static
protected
private
shared
public

1, 3

2, 5

3, 4

4, 5

[#]

It is illegal to make objects of one class as members of another class.

True

False

[#]

Which of the following is the correct way to define a variable of the type struct Emp declared below?

struct Emp
{
    private String name; 
    private int age; 
    private Single sal;
}

Emp e(); e = new Emp();
Emp e = new Emp;
Emp e; e = new Emp;
Emp e = new Emp();
Emp e;

1, 3

2, 5

4, 5

1, 2, 4

[#]

10.

The space required for structure variables is allocated on stack.

True

False

[#]

11.

Which of the following CANNOT be a target for a custom attribute?

Enum

Event

Delegate

Interface

Namespace

[#]

12.

In which of the following collections is the Input/Output based on a key?

Map
Stack
BitArray
HashTable
SortedList

1 and 2 only

2 and 3 only

1, 2 and 3 only

4 and 5 only

All of the above

[#]

13.

If a class Student has an indexer, then which of the following is the correct way to declare this indexer to make the C#.NET code snippet given below work successfully?

Student s = new Student(); 
s[1, 2] = 35;

class Student
{ 
    int[ ] a = new int[5, 5]; 
    public property WriteOnly int this[int i, int j]
    { 
        set
        { 
            a[i, j] = value;
        } 
    }
}

class Student
{ 
    int[ , ] a = new int[5, 5]; 
    public int property WriteOnly
    { 
        set
        { 
            a[i, j] = value;
        } 
    } 
}

class Student
{ 
    int[ , ] a = new int[5, 5];
    public int this[int i, int j] 
    {
        set
        { 
            a[i, j] = value;
        } 
    } 
}

class Student
{ 
    int[ , ] a = new int[5, 5];
    int i, j; 
    public int this
    { 
        set
        { 
            a[i, j] = value;
        } 
    } 
}

[#]

14.

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.

We need to organise the classes declared in Framework Class Library into different namespaces.

[#]

15.

Which of the following statements are correct about the exception reported below?
Unhandled Exception: System.lndexOutOfRangeException:
Index was outside the bounds of the array.
at IndiabixConsoleApplication.Program.Main(String[] args) in
D:\ConsoleApplication\Program.cs:line 14

The program did not handle an exception called IndexOutOfRangeException.
The program execution continued after the exception occurred.
The exception occurred in line number 14.
In line number 14, the program attempted to access an array element which was beyond the bounds of the array.
The CLR could not handle the exception.

1 only

1, 2 and 3 only

2 and 5 only

1, 3 and 4 only

None of the above

[#]

16.

It is compulsory for all classes whose objects can be thrown with throw statement to be derived from System.Exception class.

True

False

[#]

17.

In order for an instance of a derived class to completely take over a class member from a base class, the base class has to declare that member as

new

base

virtual

overrides

overloads

[#]

18.

Which of the following statement is correct about the C#.NET code snippet given below?

public class Sample
{
    public int x;
    public virtual void fun()
    { }
}
public class DerivedSample : Sample
{
    new public void fun()
    { }
}

DerivedSample class hides the fun() method of base class.

The DerivedSample class version of fun() method gets called using Sample class reference which holds DerivedSample class object.

The code replaces the DerivedSample class version of fun() method with its Sample class version.

It is not possible to hide Sample class version of fun() method without use of new in DerivedSample class.

[#]

19.

Which of the following statements is correct about an interface used in C#.NET?

If a class implements an interface partially, then it should be an abstract class.

A class cannot implement an interface partially.

An interface can contain static methods.

An interface can contain static data.

Multiple interface inheritance is not allowed.

[#]

20.

Which of the following statements are correct about an interface used in C#.NET?

An interface can contain properties, methods and events.
The keyword must implement forces implementation of an interface.
Interfaces can be overloaded.
Interfaces can be implemented by a class or a struct.
Enhanced implementations of an interface can be developed without breaking existing code.

1, 2

1, 4, 5

3, 4

3 only

[#]

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