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. Which of the following correctly opens a file for writing in C?

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

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

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

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

6. Which function is used to print output to the screen in C?

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

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

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

10. Which function can be used to flush the output buffer?

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

12. What will the function getchar() do?

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

14. What is the correct format specifier for printing an integer in C?

15. How many arguments can printf() accept?

16. Which function resets the file pointer to the beginning of the file?

17. Which of the following functions writes a string to a file?

18. Which format specifier is used to print unsigned integers?

19. Which of the following correctly reads an integer input?

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

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

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

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

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

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


 

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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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