Computer Input Output Test Online

Mustansar KhanLast Updated: October 15, 2025

Start your preparation for Computer Input Output Test Online. This online test contains important MCQs from past papers. Attempting this test will help you prepare for Annual Exams and Entry Tests. Read the questions carefully and select the correct option below to see your result.

Important Computer Input Output Question and Answer

Total Questions: 50
Time Allowed: 25 Minutes
Total Marks: 50
How to Attempt Test: Please choose the right Option in MCQ-type question.
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Computer Input/Output Practice Test Online With Explanation

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1. What is the return value of scanf() when it successfully reads one input?

2. Which function is safer to use instead of gets()?

3. Which function is used to read formatted input from the keyboard?

4. What does fflush(stdin); do?

5. Which function is used to write a block of data to a binary file?

6. What is the return type of printf()?

7. Which function pauses the program until a key is pressed?

8. Which of the following is used for binary file input/output?

9. Which function is used to write a character to a file?

10. What is the output of printf("%c", 'A' + 1);?

11. Which mode opens a file for both reading and writing, starting at the beginning?

12. Which function would you use to input values into multiple variables?

13. Which function is used to get the current position of the file pointer?

14. What does scanf("%d", &x); do?

15. Which of the following functions detects end-of-file?

16. Which function is used to close an open file?

17. Which of the following format specifiers is used for reading a float?

18. Which function prints a single character to the screen?

19. Which header file is used for standard input and output functions in C?

20. Which header file is required for getchar() and putchar()?

21. What does ferror() check?

22. What is the return type of fopen()?

23. How do you read a character array (string) using scanf()?

24. Which function is used to read a string from the user?

25. Which escape sequence is used to print a new line?


 

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Mustansar KhanLast Updated: October 15, 2025

Mustansar Khan

Hey Exam Warriors! I'm Mustansar Khan, your ally in conquering tests. Uncover strategies, real-time experiences, and expert advice to turn your study sessions into victories. Let's gear up for success!
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