C Programming Multiple Choice Question MCQ

Categories: Programming

Q1. Why is learning programming important in today's world?

(A) For academic purposes only

(B) To automate and solve complex problems

(C) Only for software development

(D) For entertainment purposes only

Answer: B

Q2. What is the main function of a compiler in programming?

(A) To write code

(B) To interpret code

(C) To convert code into machine language

(D) To debug code

Answer: C

Q3. Which of the following is true about interpreters?

(A) They execute programs faster than compilers

(B) They translate the entire program at once

(C) They translate and execute code line by line

(D) They are not used in modern programming

Answer: C

Q4. How does a compiler differ from an interpreter?

(A) A compiler executes code, while an interpreter does not

(B) A compiler debugs code, while an interpreter does not

(C) A compiler translates the entire program at once, while an interpreter translates it line by line

(D) A compiler is used only in C programming, while an interpreter is not

Answer: C

Q5. What is the primary purpose of writing a "Hello World" program when learning a new programming language?

(A) To test if the language supports string operations

(B)To learn complex programming concepts

(C) To demonstrate basic syntax and output

(D) To introduce advanced programming features

Answer: C

Q6. What will be the output of the following C program?

#include <stdio.h>

int main() {

printf("Hello, World!");

return 0;

}

(A) Hello, World!

(B) Syntax Error

(C) 0

(D) Nothing

Answer: A

Q7. Identify the error in this C program:

#include <stdio.h>

int main() {

print("Hello, World!");

return 0;

}

(A) Missing #include statement

(B) Incorrect function name

(C) Syntax error in return statement

(D) No error

Answer: B

Q8. Which of the following is not a keyword in C?

(A) int

(B) char

(C) include

(D) float

Answer: C

Q9 What data type would you use to store a character in C?

(A) int

(B) float

(C) char

(D) double

Answer: C

Q10. Which of the following is a valid identifier in C?

(A) 2ndName

(B) _name

(C) #name

(D) none of these

Answer: B

Q11 What is the size of 'int' data type in C?

(A) Depends on the system

(B) 4 bytes

(C) 8 bytes

(D) 2 bytes

Answer: A

Q12 What is the difference between 'float' and 'double' data types in C?

(A) Syntax only

(B) Precision

(C) Usage

(D) No difference

Answer: B

Q13 What will be the output of the following C code?

int main() {

char c = 'A';

printf("%d", c);

return 0;

}

(A) 65

(B) A

(C) Syntax Error

(D) None of these

Answer: A

Q14 Identify the error in this C code:

int main() {

int number = 100.5;

printf("%d", number);

return 0;

}

(A) Assigning float to int

(B) Syntax error

(C) No error

(D) Wrong printf format

Answer: A

Q15 Spot the error in this code snippet:

#include <stdio.h>

int main() {

const int age; age = 30;

printf("%d", age);

return 0;

}

(A) Uninitialized constant

(B) Missing return statement

(C) Syntax error in printf statement

(D) No error

Answer: A

Q16 What is the purpose of the printf function in C?

(A) To read input

(B) To print output

(C) To perform calculations

(D) To control program flow

Answer: B

Q17 What does %d signify in the printf or scanf function?

(A) Double data type

(B) Decimal integer

(C) Dynamic allocation

(D) Directory path

Answer: B

Q18 What will be the output of the following C code?

int main() {

printf("%d", 500);

return 0;

}

(A) 500

(B) %d

(C) Syntax Error

(D) None of these

Answer: A

Q19 What will the following C code output?

int main() {

int num;

scanf("%d", &num);

printf("%d", num);

return 0;

}

(A) The inputted number

(B) %d

(C) Syntax Error

(D) Nothing

Answer: A

Q20 Pseudocode: READ number PRINT "The number is ", number

What does this pseudocode do?

(A) Reads and prints a number

(B) Prints a fixed number

(C) Generates a random number

(D) None of these

Answer: A