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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 is used to close an open file?

fileclose()

stop()

fclose()

closefile()

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

fprintf()

printf()

fputs()

puts()

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

Reads a character

Prints an integer

Reads an integer

Writes to a file

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

printf()

putc()

fputchar()

fwrite()

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

"r+"

"w+"

"a+"

"rw"

6. Which format specifier is used for character output?

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

startfile()

seekstart()

reset()

rewind()

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

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

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

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

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

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

clear();

remove();

flush()

fflush(stdout);

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

putch()

printf()

puts()

putchar()

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

fseek()

rewind()

feof()

ftell()

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

%lf

13. What does fflush(stdin); do?

Reads a string

Clears the input buffer

Writes to a file

Flushes output buffer

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

getchar()

getch()

break()

pause()

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

scanf()

printf()

cin

cout

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

printf()

puts()

scanf()

fscanf()

17. What will the function getchar() do?

Display a character

Read an integer

Read a single character from the keyboard

Take string input

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

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

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

putch()

scanf()

getc()

printf()

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

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

fputs()

putc()

fprintf()

fwrite()

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

scanf()

fgets()

getch()

puts()

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

fscanf()

fprintf()

printf()

scanf()

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

getchar()

putch()

fgetc()

getch()

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

scanf()

getchar()

getch()

gets()

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

fseek()

ftell()

fread()

rewind()

28. How many arguments can printf() accept?

Fixed to three

Only two

It depends on the format string

Only one

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

void

float

int

char

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

print()

printf()

putchar()

puts()

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

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

33. What does ferror() check?

End of file

If an error occurred during file I/O

File permissions

File name

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

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

printf()

getch()

scanf()

fopen()

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

NULL

-1

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

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

stdlib.h

string.h

stdio.h

conio.h

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

printf()

scanf()

input()

get()

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

fread() and fwrite()

fopenb()

getc() and putc()

read() and write()

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

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

stdio.h

math.h

stdlib.h

string.h

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

freadchar()

getc()

getch()

readchar()

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

scanf("%c", str);

scanf("%s", &str);

scanf("%s", str);

scanf("%f", str);

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

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

puts()

fwrite()

fputs()

putc()

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

ftell()

filepos()

rewind()

fseek()

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

scanf("%d", &x);

scanf("%i", &x);

scanf("%d", x);

scanf("%f", &x);

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

FILE *

char

int

void *

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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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ECAT Computer Science Input/OutputTest

ECAT Computer Science Chapter 20 Input Output Online Test

ECAT Input/Output Test Online MCQs

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Mustansar Khan

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