Decision making in C

1. What is the correct syntax for an if statement in C?

• if condition { /* code to execute */ }
• if (condition) /* code to execute */
• if { condition } { /* code to execute */ }
• if (condition) { /* code to execute */ }

1. Which of the following statements is true about the else if construct?

• The 'else if' construct can only be used once in a program.
• The 'else if' construct does not allow for nested conditions.
• The 'else if' construct is only applicable in switch statements.
• The 'else if' construct allows for multiple conditional checks.

1. What will the following code print if x = 10?

   if (x < 5) {

    printf("Less than 5");

} else if (x < 15) {

    printf("Less than 15");

} else {

    printf("15 or more");

}

• Exactly 10
• Less than 5
• Less than 15
• 15 or more

1. In C, which of the following statements correctly implements a switch-case?

• switch(expression) { case value1: // code block; default: // code block; }

• switch(value) { case value1: // code block; case value2: // code block; }
• switch(expression) { case value1: // code block; break; case value2: // code block; break; default: // code block; }
• switch(expression) { case value1: // code block; break; case value2: // code block; continue; }

1. What will the following code output if num is 3?

switch (num) {

    case 1:

        printf("One");

        break;

    case 2:

        printf("Two");

        break;

    default:

        printf("Default");

        break;

}

• One
• Three
• Two
• Default

1. Which of the following expressions is evaluated in an if statement in C?

• Integer values only

• Boolean values only

• Any expression that evaluates to zero (false) or non-zero (true)

• String literals only

1. What is the output of the following code segment?

int a = 5, b = 10;

if (a > b)

    printf("A is greater");

else if (a < b)

    printf("B is greater");

else

    printf("A and B are equal");

• A and B are equal
• B is greater
• A is greater
• B is less than A

1. What is the output of the following code when x = 7?

if (x > 10) {

    printf("Greater than 10");

} else if (x > 5) {

    printf("Greater than 5");

} else {

    printf("5 or less");

}

• Greater than 5
• Greater than 15
• Less than 5
• Equal to 10

1. In C, which of the following is a valid way to write an if statement that checks if a is not equal to b?

• if (a = b)
• if (a != b)
• if (a <> b)
• if (a != b;)

1. What will be the output of the following code if day = 5?

switch (day) {

    case 1: printf("Monday");

    case 2: printf("Tuesday");

    case 3: printf("Wednesday");

    case 4: printf("Thursday");

    case 5: printf("Friday");

    default: printf("Weekend");

}

• FridayWeekend
• WeekendMonday
• MondayTuesday
• WednesdayThursday