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ECAT Computer Input Output Test Online

Mustansar KhanLast Updated: May 1, 2025

ECAT Computer Science Input/OutputTest

ECAT Computer Science Chapter 20 Input Output Online Test

Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	ECAT Entry Test Computer Online Test Interview Questions about Computer All Universities Entrance Test Recruitments Tests

ECAT Input/Output Test Online MCQs

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

pause()

getchar()

break()

getch()

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

scanf()

printf()

cout

cin

3. Which escape character is used for a horizontal tab?

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

getch()

getchar()

scanf()

gets()

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

startfile()

seekstart()

reset()

rewind()

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

putc()

fputs()

fwrite()

puts()

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

getch()

scanf()

fgets()

puts()

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

fopen("file.txt", "r");

fopen("file.txt", "w");

fopen("file.txt", "a+");

fopen("file.txt", "rb");

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

printf()

putch()

scanf()

getc()

10. Which of the following can be used to print hexadecimal values?

11. Which format specifier is used for character output?

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

putch()

printf()

putchar()

puts()

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

scanf("%s", &str);

scanf("%c", str);

scanf("%f", str);

scanf("%s", str);

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

Reads a character

Writes to a file

Reads an integer

Prints an integer

15. What does ferror() check?

File name

End of file

File permissions

If an error occurred during file I/O

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

fclose()

stop()

closefile()

fileclose()

17. How many arguments can printf() accept?

Only two

It depends on the format string

Only one

Fixed to three

18. Which of the following is a formatted output function for files?

fprintf()

fputs()

puts()

printf()

19. Which function displays a string followed by a newline character?

putchar()

puts()

print()

printf()

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

"w+"

"a+"

"r+"

"rw"

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

math.h

stdio.h

string.h

stdlib.h

22. What is the correct format specifier to print a double?

%lf

23. What is the format specifier for reading a string?

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

25. Which function is used to move the file pointer?

rewind()

fseek()

fread()

ftell()

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

flush()

fflush(stdout);

remove();

clear();

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

fopenb()

fread() and fwrite()

read() and write()

getc() and putc()

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

rewind()

ftell()

fseek()

feof()

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

30. Which I/O function is used for file input/output?

scanf()

printf()

fopen()

getch()

31. Which of the following is a non-formatted input/output function?

puts()

fscanf()

scanf()

printf()

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

fputchar()

putc()

printf()

fwrite()

33. Which symbol is used to access the address of a variable?

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

int

void *

FILE *

char

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

stdlib.h

stdio.h

conio.h

string.h

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

scanf("%i", &x);

scanf("%f", &x);

scanf("%d", &x);

scanf("%d", x);

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

-1

NULL

38. What does fflush(stdin); do?

Clears the input buffer

Reads a string

Flushes output buffer

Writes to a file

39. What will the function getchar() do?

Read an integer

Take string input

Display a character

Read a single character from the keyboard

40. Which function reads a single character and echoes it to the screen?

getchar()

fgetc()

putch()

getch()

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

fwrite()

fputs()

fprintf()

putc()

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

43. Which function is used to read a character from a file?

freadchar()

getch()

getc()

readchar()

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

filepos()

rewind()

fseek()

ftell()

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

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

char

int

float

void

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

scanf()

get()

printf()

input()

48. Which of the following functions allows formatted input from a file?

fprintf()

printf()

scanf()

fscanf()

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

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Mustansar KhanLast Updated: May 1, 2025

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ECAT Computer Input Output Test Online

ECAT Computer Science Input/OutputTest

ECAT Computer Science Chapter 20 Input Output Online Test

ECAT Input/Output Test Online MCQs

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