C# Programming - Control Instructions

Exercise :: Control Instructions - General Questions

  • Control Instructions - General Questions
11. 

The C#.NET code snippet given below generates ____ numbers series as output?

int i = 1, j = 1, val;
while (i < 25)
{
    Console.Write(j + " ");
    val = i + j;
    j = i;
    i = val;
}

A. Prime
B. Fibonacci
C. Palindrome
D. Odd
E. Even

Answer: Option B

Explanation:

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12. 

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

A. 1, 3
B. 2, 5
C. 1, 4, 5
D. 3, 4, 5
E. None of these

Answer: Option C

Explanation:

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13. 

Which of the following statements are correct?

  1. A switch statement can act on numerical as well as Boolean types.
  2. A switch statement can act on characters, strings and enumerations types.
  3. We cannot declare variables within a case statement if it is not enclosed by { }.
  4. 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.
  5. All of the expressions of the for statement are not optional.

A. 1, 2
B. 2, 3
C. 3, 5
D. 4, 5
E. None of these

Answer: Option A

Explanation:

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14. 

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);

A. 0
B. 1
C. Compile Error
D. Run time Error

Answer: Option A

Explanation:

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15. 

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;
}

A. Compiler will report an error in case ls > 20 as well as in case Else.
B. There is no error in this switch case statement.
C. Compiler will report an error only in case Else.
D. Compiler will report an error as there is no default case.
E. The order of the first three cases should be case 1, case 6, case 13 (ascending).

Answer: Option A

Explanation:

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