File Input Output MCQs

Question 1

What is the return value of 'putc' if it fails to write a character to a file in C?

Accepted Answer

EOF

Answer

0

Answer

1

Answer

-1

Question 2

Which function is used to read and write data in binary mode in C?

Accepted Answer

fread()

Answer

fwritedata()

Answer

readbinary()

Answer

writebinary()

Question 3

What is the purpose of the 'fileno' function in C?

Accepted Answer

To find the file number associated with a file

Answer

To check if a file exists

Answer

To get the file's size

Answer

To close a file

Question 4

The given statement FILE *fptr;

Accepted Answer

Defines a pointer to the pre-defined structure type FILE

Answer

Defines a pointer to the user-defined structure type FILE

Answer

Defines a pointer to the pre-defined data type FILE DESCRIPTOR

Answer

Creates a file with the name fptr

Question 5

The function fprintf is used in the program ...........

Accepted Answer

When the output is to be printed on to a file.

Answer

When too many printf calls have been used in the program.

Answer

In place of printf, as it uses more memory.

Answer

When the type of the variables to be printed are not known.

Question 6

What are the two predefined FILE pointers in C?

Accepted Answer

stdout and stderr

Answer

console and error

Answer

stdout and stdio

Answer

stdio and stderr

Question 7

Which one of the following is valid for opening a read-only ASCII file?

Accepted Answer

fopen(filename, "r");

Answer

fopen(filename, "ra");

Answer

fileOpne(filename, read);

Answer

fopen(filename, "read");

Question 8

Choose the correct difference between getc() and fgetc().

Accepted Answer

if it is a macro, it may evaluate stream more than once

Answer

If it is not a macro, it may evaluate stream more than once

Answer

if it is amacro, it may not evaluate stream more than once

Answer

no difference between fgetc() and getc()

Question 9

. . . . . . . . is an optional argument that gives the maximum number of characters to be read.

Accepted Answer

width

Answer

modifiers

Answer

precision

Answer

length