Control Flow (if else switch) – Multiple Choice Questions (MCQs)

1. 1. Which keyword is used to start an if statement in C?

   • A. if
   • B. then
   • C. switch
   • D. case

2. 2. Which keyword is used to specify a block of code to be executed if the if condition is false?

   • A. else if
   • B. elseif
   • C. else
   • D. otherwise

3. 3. Which keyword is used to check multiple conditions sequentially in an if-else structure?

   • A. else
   • B. elseif
   • C. switch
   • D. case

4. 4. What is the purpose of the 'switch' statement in C?

   • A. To loop through a block of code
   • B. To define a function
   • C. To execute different blocks of code based on the value of an expression
   • D. To declare a variable

5. 5. Which keyword is used to define different cases within a 'switch' statement?

   • A. default
   • B. otherwise
   • C. case
   • D. option

6. 6. What happens if none of the 'case' values match the expression in a 'switch' statement?

   • A. The program terminates
   • B. The 'if' block is executed
   • C. The 'default' block is executed (if present)
   • D. Nothing happens

7. 7. Which keyword is used to specify a default block of code in a 'switch' statement?

   • A. default
   • B. else
   • C. otherwise
   • D. none

8. 8. What is the purpose of the 'break' statement within a 'switch' case?

   • A. To exit the program
   • B. To skip the next iteration of a loop
   • C. To exit the 'switch' statement
   • D. To continue to the next case

9. 9. Can you have nested if-else statements in C?

   • A. Yes
   • B. No
   • C. Only up to a certain level
   • D. It depends on the compiler

10. 10. What is the condition in an 'if' statement enclosed in?

    • A. Square brackets []
    • B. Curly braces {}
    • C. Parentheses ()
    • D. Angle brackets <>

11. 11. What will be the output of the following code? `int x = 5; if (x > 3) { printf(\Hello\"); }`"""

    • A. Hello
    • B. No output
    • C. Error
    • D. 5

12. 12. What will be the output of the following code? `int x = 2; if (x > 3) { printf(\Hello\"); } else { printf(\""World\""); }`"""

    • A. Hello
    • B. World
    • C. Error
    • D. 2