- C# Test 1

What will be the output of the code snippet given below?

int i;
 for(i = 0; i<=10; i++)
 {
 if(i == 4)
 {
 Console.Write(i + " "); continue;
 }
 else if (i != 4)
 Console.Write(i + " "); else
 break;
 }

4

4 5 6 7 8 9 10

0 1 2 3 4 5 6 7 8 9 10

1 2 3 4

1 2 3 4 5 6 7 8 9 10

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

byte b1 = 0xF7;
 byte b2 = 0xAB;
 byte temp;
 temp = (byte)(b1 & b2);
 Console.Write (temp + " ");
 temp = (byte)(b1^b2);
 Console.WriteLine(temp);

0 1

192 63

92 163

163 92

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

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

1. An error will be reported in the statement s, c = fun(a); since multiple values returned from a function cannot be collected in this manner.
2. It will output 25 125.
3.It will output 25 0.
4. It will output 0 125.
5. An error will be reported in the statement return ss, cc; since a function cannot return multiple values.

1, 5

4, 5

1, 3

2, 4

None of these

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

namespace IndiabixConsoleApplication
 {
 class SampleProgram
 {
 static void Main(string[ ] args)
 {
 int i = 5;
 int j;
 fun1(ref i);
 fun2(out j);
 Console.WriteLine(i + ", " + j);
 }
 static void funl(ref int x)
 {
 x = x * x;
 }
 static void fun2(out int x)
 {
 x = 6; 
 x = x * x; 
 }
 }
 }

5, 36

25, 36

25, 0

5, 0

5, 6

The this reference gets created when a member function (non-shared) of a class is called.

True

False

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

int i;
 int j = new int();
 i = 10;
 j = 20; 
 String str; 
 str = i.ToString(); 
 str = j.ToString();

This is a perfectly workable code snippet.

Since an int is a primitive, we cannot call the method ToString() using it.

Since int is a primitive, we cannot use new with it.

i will get created on stack, whereas j will get created on heap.

Both i and j will get created on heap.

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

namespace IndiabixConsoleApplication
 { 
 class Sample
 { 
 int i, j; 
 public void SetData(int ii, int jj)
 {
 this.i = ii;
 this.j = jj 
 } 
 } 
 class MyProgram
 { 
 static void Main(string[ ] args)
 { 
 Sample s1 = new Sample(); 
 s1.SetData(10, 2); 
 Sample s2 = new Sample(); 
 s2.SetData(5, 10); 
 } 
 } 
 }

Contents of this will be different during each call to SetData().

The definition of SetData() is wrong since we have not explicitly collected the this reference.

The call to SetData() is wrong since we have not explicitly passed the this reference to it.

Using this in this program is necessary to properly set the values in the object.

The code will not compile since we cannot explicitly use this.

Which of the following can be facilitated by the Inheritance mechanism?
1. Use the existing functionality of base class.
2. Overrride the existing functionality of base class.
3. Implement new functionality in the derived class.
4. Implement polymorphic behaviour.
5. Implement containership.

3, 4

1, 2, 3

2, 4, 5

3, 5

Which of the following should be used to implement a 'Like a' or a 'Kind of' relationship between two entities?

Inheritance

Encapsulation

Templates

Containership

Polymorphism

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

int[][]intMyArr = new int[2][]; 
 intMyArr[0] = new int[4]{6, 1, 4, 3}; 
 intMyArr[1] = new int[3]{9, 2, 7};

intMyArr refers to intMyArr[1] and intMyArr[2].

intMyArr refers to intMyArr[0] and intMyArr[1].

intMyArr[0] refers to the zeroth 1-D array and intMyArr[1] refers to the first 1-D array.

intMyArr is a reference to a 2-D jagged array.

The two rows of the jagged array intMyArr are stored in adjacent memory locations.

Which of the following statements will correctly copy the contents of one string into another ?

String s1 = "String"; 
 String s2;
 s2 = s2.StringCopy(s1);

String s1 = "String"; 
 String s2;
 s2 = s1.Replace();

String s1 = "String"; 
 String s2;
 s2 = String.Copy(s1);

String s1 = "String" ; 
 String s2;
 s2 = String.Concat(s1, s2);

String s1 = "String";
 String s2; 
 s2 = s1;

Which of the following statements about a String is correct?

A String is created on the heap.

A String can be created by using the statement String s1 = new String;

A String is a primitive.

Whether a String is created on the stack or the heap depends on the length of the String.

A String is created on the stack.

Which of the following will be the correct output for the program given below?

namespace IndiabixConsoleApplication
 { 
 struct Sample
 {
 public int i;
 }
 class MyProgram
 { 
 static void Main(string[] args)
 {
 Sample x = new Sample();
 Sample y;
 x.i = 9;
 y = x;
 y.i = 5;
 Console.WriteLine(x.i + " " + y.i); 
 } 
 } 
 }

9 9

5 5

9 5

5 9

None of the above

Which of the following are correct ways to pass a parameter to an attribute?
1. By value
2. By reference
3. By address
4. By position
5. By name

1, 2

1, 2, 3

4, 5

All of the above

Which of the following statements are correct about inspecting an attribute in C#.NET?
1. An attribute can be inspected at link-time.
2. An attribute can be inspected at compile-time.
3. An attribute can be inspected at run-time.
4. An attribute can be inspected at design-time.

1, 3, 4

3, 4

1, 2

None of the above

All of the above

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

Stack st = new Stack();
 st.Push("hello");
 st.Push(8.2);
 st.Push(5);
 st.Push('b');
 st.Push(true);

This is a perfectly workable code.

To store dissimilar elements in a Stack collection, a method PushAnyType() should be used in place of Push().

In the fourth call to Push(), we should write "b" in place of 'b'.

Boolean values can never be stored in Stack collection.

Dissimilar elements like "hello", 8.2, 5 cannot be stored in the same Stack collection.

Which of the following is the Object Oriented way of handling run-time errors?

Setjump and Longjump

Error codes

Exceptions

HERESULT

OnError

Exceptions can be thrown even from a constructor, whereas error codes cannot be returned from a constructor.

False

True

Which of the following statements is correct about the C#.NET program given below if a value "ABCD" is input to it?

using System;
 namespace IndiabixConsoleApplication
 {
 class MyProgram
 {
 static void Main(string[] args)
 {
 int index; 
 int val = 55; 
 int[] a = new int[5]; 
 try
 {
 Console.Write("Enter a number: ");
 index = Convert.ToInt32(Console.ReadLine());
 a[index] = val;
 }
 catch(FormatException e)
 {
 Console.Write("Bad Format ");
 }
 catch(IndexOutOfRangeException e)
 {
 Console.Write("Index out of bounds ");
 }
 Console.Write("Remaining program ");
 }
 }
 }

It will output: Index out of bounds Remaining program

It will output: Bad Format Remaining program

It will output: Index out of bounds

It will output: Remaining program

It will output: Bad Format

Which of the following statements is correct about an interface?

The functions declared in an interface have a body.

A class that implements an interface can explicitly implement members of that interface.

One interface can be implemented in another interface.

An interface can be implemented by multiple classes in the same program.