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Conditional Statements Interview Questions

MCQ Question 1 of 10

Question 1: Purpose of if statement

The primary purpose of an if statement in C programming is to:

Create a loop that repeats code.Compare two variables for equality.Execute a block of code only if a specified condition is true.Assign a value to a variable.

Question 2: if-else if vs. separate if

What is a key difference between using a series of separate if statements and using an if-else if ladder?

An if-else if ladder is always more efficient.A series of separate if statements can execute multiple blocks of code if multiple conditions are true.A series of separate if statements requires more memory.An if-else if ladder can only have two conditions.

Question 3: Purpose of switch statement

The switch statement is best suited for scenarios where you need to:

Check a series of complex relational expressions (e.g., x > 5 && y < 10).Select one of many code blocks to execute based on a single integer or character value.Execute a block of code for a range of values.Iterate through an array.

Question 4: The break keyword

What is the main purpose of the break keyword inside a switch statement?

To stop the entire program.To exit the switch statement after a case has been executed.To skip to the next case without executing any code.To return a value from the function.

Question 5: The default case

The default case in a switch statement serves what purpose?

It is a mandatory part of every switch statement.It executes if none of the case values match the expression.It is used for error handling only.It is a synonym for the else statement.

Question 6: Simple If Statement

What is the output of the following C code?

#include 

int main() {
    int x = 10;
    if (x == 10) {
        printf("True");
    } else {
        printf("False");
    }
    return 0;
}

TrueFalseErrorNothing is printed

Question 7: If-Else Statement

What is the output of the following C code?

#include 

int main() {
    int num = 7;
    if (num % 2 == 0) {
        printf("Even");
    } else {
        printf("Odd");
    }
    return 0;
}

EvenOddEvenOddError

Question 8: Else-If Ladder

What is the output of the following C code?

#include 

int main() {
    int score = 85;
    if (score >= 90) {
        printf("A");
    } else if (score >= 80) {
        printf("B");
    } else {
        printf("C");
    }
    return 0;
}

ABCError

Question 9: Nested If Statements

What is the output of the following C code?

#include 

int main() {
    int a = 5, b = 10;
    if (a < b) {
        if (a == 5) {
            printf("Correct");
        }
    } else {
        printf("Incorrect");
    }
    return 0;
}

CorrectIncorrectNothing is printedError

Question 10: Logical Operators in If

What is the output of the following C code?

#include 

int main() {
    int temp = 25;
    if (temp > 20 && temp < 30) {
        printf("Pleasant");
    } else {
        printf("Extreme");
    }
    return 0;
}

PleasantExtremeNothing is printedError