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File Processing - Questions with Answers on C Programming Language

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C programming file processing quiz & multiple choice questions(mcqs) and answers are available to download in PDF for free. These objective type questions with Answers are useful for preparations of competitive exams like CBSE NET, GATE, NIELIT, BCA, B.Sc. MCA, M.Sc. B.Tech, M.Tech, BE, ME etc.
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(1) How is a variable accessed from another file?
[A] via the extern specifier
[B] via the auto specifier
[C] via the global specifier
[D] via the pointer specifier

Comment

Answer: Option [A]

The extern keyword is used to indicate that the variable can be accessed by another file. It's name is visible globally.

(2) The statement 

	#include"filename.h"

is replaced by the constants of "filename.h"

[A] before compilation)
[B] after compilation
[C] during execution
[D] during typing of the program

Comment

Answer: Option [A]

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(3) Which of the following functions need a filename?
[A] fopen
[B] fclose
[C] fread
[D] none of these

Comment

Answer: Option [A]

The fopen function need a filename. It opens a file and points either begining or end of the file.

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

here r stands for file access mode for reading a file only. The other modes are w, a, r+, w+, a+

(4) In the following 'C' code 

	{
		FILE *f=fopen(filename, "r");
		fread(f);
		if(????)
		puts("End of file reached");
	}

Which one of the following can replace the ???? in the code above to determine if the end of a file has been reached?

[A] f==EOF
[B] feof(f)
[C] eof(f)
[D] f==NULL

Comment

Answer: Option [A]

In 'C' programming EOF(end of file) is used to read a file till the end.

The syntax is as given below:

If(f==EOF)

(5) What is/are the purpose/purposes of buffer cache?
[A] Allocate memory
[B] Speed up read/write
[C] File system recovery
[D] All of the above

Comment

Answer: Option [B]

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