Variables and Data Types Interview Questions

    Question 1: Variable Declaration

    What is the correct way to declare an integer variable named count in C?

    Question 2: Guess the Output - Integer Division

    What will be the output of the following C code snippet?

    #include 

int main() {
    int x = 5, y = 2;
    printf("%d", x / y);
    return 0;
}

    Question 3: Character Data Type

    Which of the following data types is used to store a single character and occupies 1 byte of memory?

    Question 4: Guess the Output - Type Mismatch

    What will be the output of the following C code snippet?

    #include <stdio.h>

int main() {
    int num = 'C';
    printf("%d", num);
    return 0;
}

    Question 5: Floating-Point Data Type

    How do you declare a variable named pi to store the value 3.14159 with high precision?

    Question 6: Guess the Output - Type Promotion

    What is the output of the following code?

    #include <stdio.h>

int main() {
    int a = 10;
    float b = 3.0;
    printf("%.2f", a / b);
    return 0;
}

    Question 7: Variable Naming Rules

    Which of the following is a valid variable name in C?

    Question 8: Guess the Output - sizeof Operator

    Assuming a 32-bit system, what is the output of this code?

    #include <stdio.h>

int main() {
    printf("%lu", sizeof(char));
    return 0;
}

    Question 9: Data Type Modifiers

    The long data type modifier is used to:

    Question 10: Guess the Output - Constant Declaration

    What is the output of the following code?

    #include <stdio.h>
#define PI 3.14

int main() {
    printf("%f", PI * 2);
    return 0;
}