Fundamentals of C Language - Quiz

Q: What is the output of the following C code?


#include <stdio.h>

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    printf("%d", *(arr + 2));
    return 0;
}

A. 1
B. 2
C. 3
D. 4

Correct Option: C
Explanation:

Answer: C

Explanation: The expression *(arr + 2) is equivalent to arr[2], which accesses the third element of the arr array. Therefore, the output will be 3.

Q: Which of the following is not a valid data type in C?

A. char
B. int
C. float
D. string

Correct Option: D
Explanation:

Answer: D

Explanation: string is not a valid data type in C. Instead, strings are represented as arrays of characters in C.

Q: Write a function to swaps the values of two integers.

A. No solution exist.
B. Solution need 2 extra variables
C. Solution exist without any extra variables
D. Solution need 1 extra variable

Correct Option: C
Explanation: Solution c Solution exist without any extra variables

1.

void swap(int a, int b)
{
int c;
c=a;
a=b;
b=c;
}

2.

void swap (int a, int b)
{

a=a+b;

b=a-b;

a=a-b;

}

Solution2 is the best solution since no extra variable is required.

Q: Which of the following symbol is used to denote a pre-processor statement?

A. !
B. #
C. ~
D. ;

Correct Option: B
Explanation: #

Q: Before execution compiler converts high-level program into machine language program, the machine language program is called

A. Source program
B. Object program
C. exe program
D. None of this

Correct Option: B
Explanation: Answer: Object program A source program is a text file that contains instructions written in a high level language. It can not be executed (made to run) by a processor without some additional steps. A source program is also called a source file, source code, or sometimes, just source. A source program is a collection of instructions written using a programming language, while an object program is an output generated after compiling the source program. An EXE file contains an executable program for Windows. EXE is short for "executable," and it is the standard file extension used by Windows programs. For many Windows users, EXE files are synonymous with Windows programs, making ".exe" one of the most recognizable file extensions.

Q: Which of the following language is predecessor to C Programming Language?

A. A
B. BTYU
C. BCPL
D. C++

Correct Option: C
Explanation: BCPL

Q: C was developed in the year ___

A. 1970
B. 1972
C. 1976
D. 1975

Correct Option: B
Explanation: 1972

Q: What is the output of the following C code?


#include <stdio.h>

int main() {
    int x = 5;
    if (x > 10) {
        printf("x is greater than 10");
    }
    else {
        printf("x is less than or equal to 10");
    }
    return 0;
}

A. x is greater than 10
B. x is less than or equal to 10
C. The code will result in a runtime error
D. The code will result in a compile error

Correct Option: B
Explanation:

Answer: B

Explanation: The if statement checks if x is greater than 10, which it is not. Therefore, the code inside the else block is executed, resulting in the output "x is less than or equal to 10".

Q: What is the output of the following C code?


#include <stdio.h>

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

A. 5
B. 6
C. 4
D. The code will result in a compile error

Correct Option: A
Explanation:

Answer: A

Explanation: The value of x is first printed using printf, and then incremented by the ++ operator. Therefore, the output will be 5.

Q: What is the output of the following C code?


#include <stdio.h>

int main() {
    int i = 0;
    while (i < 5) {
        printf("%d ", i);
        i++;
    }
    return 0;
}

A. 0 1 2 3 4
B. 1 2 3 4 5
C. 5 4 3 2 1
D. The code will result in an infinite loop

Correct Option: A
Explanation:

Answer: A

Explanation: The while loop continues to execute as long as i is less than 5. Inside the loop, the value of i is printed using printf, and then incremented by 1. Therefore, the output will be "0 1 2 3 4".

Fundamentals of C Language - Quiz

What is the output of the following C code? #include <stdio.h> int main() { int arr[] = {1, 2, 3, 4, 5}; printf("%d", *(arr + 2)); return 0; }

Which of the following is not a valid data type in C?

Write a function to swaps the values of two integers.

Which of the following symbol is used to denote a pre-processor statement?

Before execution compiler converts high-level program into machine language program, the machine language program is called

Which of the following language is predecessor to C Programming Language?

C was developed in the year ___

What is the output of the following C code? #include <stdio.h> int main() { int x = 5; if (x > 10) { printf("x is greater than 10"); } else { printf("x is less than or equal to 10"); } return 0; }

What is the output of the following C code? #include <stdio.h> int main() { int x = 5; printf("%d", x++); return 0; }

What is the output of the following C code? #include <stdio.h> int main() { int i = 0; while (i < 5) { printf("%d ", i); i++; } return 0; }

What is the output of the following C code?

What is the output of the following C code?

What is the output of the following C code?

What is the output of the following C code?