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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 reads a single character and echoes it to the screen?

getch()

fgetc()

getchar()

putch()

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

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

scanf()

getch()

fopen()

printf()

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

gets()

scanf()

getch()

getchar()

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

rewind()

filepos()

ftell()

fseek()

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

Reads a character

Prints an integer

Writes to a file

Reads an integer

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

flush()

fflush(stdout);

clear();

remove();

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

break()

pause()

getch()

getchar()

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

readchar()

freadchar()

getch()

getc()

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

get()

input()

printf()

scanf()

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

closefile()

fclose()

fileclose()

stop()

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

"w+"

"rw"

"a+"

"r+"

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

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

feof()

fseek()

ftell()

rewind()

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

%lf

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

scanf("%f", str);

scanf("%s", &str);

scanf("%s", str);

scanf("%c", str);

17. What does ferror() check?

End of file

File permissions

If an error occurred during file I/O

File name

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

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

printf()

scanf()

fprintf()

fscanf()

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

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

getch()

puts()

scanf()

fgets()

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

putch()

printf()

scanf()

getc()

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

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

getc() and putc()

read() and write()

fread() and fwrite()

fopenb()

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

-1

NULL

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

scanf("%f", &x);

scanf("%i", &x);

scanf("%d", x);

scanf("%d", &x);

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

void *

char

FILE *

int

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

printf()

cin

cout

scanf()

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

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

math.h

stdio.h

string.h

stdlib.h

31. Which format specifier is used for character output?

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

printf()

scanf()

fscanf()

puts()

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

putchar()

puts()

printf()

putch()

34. What will the function getchar() do?

Display a character

Read a single character from the keyboard

Read an integer

Take string input

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

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

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

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

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

36. What does fflush(stdin); do?

Flushes output buffer

Reads a string

Writes to a file

Clears the input buffer

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

fprintf()

fwrite()

fputs()

putc()

38. How many arguments can printf() accept?

Fixed to three

It depends on the format string

Only one

Only two

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

putchar()

printf()

puts()

print()

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

fputs()

puts()

fprintf()

printf()

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

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

puts()

fputs()

fwrite()

putc()

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

conio.h

string.h

stdio.h

stdlib.h

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

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

void

float

char

int

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

fseek()

fread()

ftell()

rewind()

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

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

startfile()

rewind()

reset()

seekstart()

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

printf()

putc()

fputchar()

fwrite()

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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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