C Sharp - Control Instructions - Practice Questions

Question 1

What will be the output of the C#.NET code snippet given below?

char ch = Convert.ToChar ('a' | 'b' | 'c'); 
switch (ch)
{
    case 'A': 
    case 'a':
    Console.WriteLine ("case A | case a");
    break;
    
    case 'B': 
    case 'b':
    Console.WriteLine ("case B | case b");
    break;
    
    case 'C':
    case 'c':
    case 'D':
    case 'd':
    Console.WriteLine ("case D | case d");
    break;
}

Accepted Answer

Question 2

Which of the following statements is correct?

Accepted Answer

Question 3

What will be the output of the C#.NET code snippet given below?

int val;
for (val = -5; val <= 5; val++)
{
    switch (val)
    {
        case 0:
            Console.Write ("India"); 
            break;
    }
    
    if (val > 0)
        Console.Write ("B"); 
    else if (val < 0)
        Console.Write ("X");
}

Accepted Answer

Question 4

Which of the following statements are correct about the C#.NET code snippet given below? if (age > 18 || no < 11) a = 25; 1 .The condition no < 11 will get evaluated only if age > 18 evaluates to False. 2.The condition no < 11 will get evaluated if age > 18 evaluates to True. 3.The statement a = 25 will get evaluated if any one one of the two conditions is True. 4. || is known as a short circuiting logical operator. 5.The statement a = 25 will get evaluated only if both the conditions are True.

Accepted Answer

Question 5

Which of the following statements are correct?

    A switch statement can act on numerical as well as Boolean types.
    A switch statement can act on characters, strings and enumerations types.
    We cannot declare variables within a case statement if it is not enclosed by { }.
    The foreach statement is used to iterate through the collection to get the desired information and should be used to change the contents of the collection to avoid unpredictable side effects.
    All of the expressions of the for statement are not optional.

Accepted Answer

Question 6

Which of the following statements is correct about the C#.NET code snippet given below?

switch (id)
{
    case 6: 
        grp = "Grp B"; 
        break;
    
    case 13:
        grp = "Grp D";
        break;
    
    case 1:
        grp = "Grp A";
        break;
    
    case ls > 20:
        grp = "Grp E";
        break ;
    
    case Else:
        grp = "Grp F";
        break;
}

Accepted Answer

Question 7

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;
}

Accepted Answer

Question 8

What does the following C#.NET code snippet will print?

int i = 0, j = 0; 

label:
    i++;
    j+=i;
if (i < 10)
{
    Console.Write(i +" ");
    goto label; 
}

Accepted Answer

Question 9

Which of the following statements is correct about the C#.NET code snippet given below?

int i, j, id = 0; switch (id)
{ 
    case i:
        Console.WriteLine("I am in Case i");
        break; 
    
    case j:
        Console.WriteLine("I am in Case j");
        break;
}

Accepted Answer

Question 10

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);

Accepted Answer