QUIZ ON : C LANGUAGE - FILE PROCESSING

FILE PROCESSING

00:00:00

Which function will return the current file position for stream?

Option A. fgetpos()
Option B. fseek()
Option C. ftell()
Option D. fsetpos()
True Answer C

Explanation :
The current file position is returned by ftell() function for stream, or -1L on error.

Which function will return the current file position for stream?

Question No# : 01 out of 20



The two type of file structures existing in VSAM file are

Option A. Key sequenced structures, entry sequenced structures
Option B. Key sequenced structure, exit sequenced structures
Option C. Entry sequenced structures, exit sequenced structures
Option D. None of the above
True Answer C

Explanation :

The two type of file structures existing in VSAM file are

Question No# : 02 out of 20

In C language, FILE is of which data type?

Option A. int
Option B. char *
Option C. struct
Option D. None of the mentioned
True Answer C

Explanation :

In C language, FILE is of which data type?

Question No# : 03 out of 20



What does fp point to in the program?


int main()
{
FILE *fp;
fp=fopen("trial", "r");
return 0;
}

Option A. The first character in the file
Option B. A structure which contains a char pointer which points to the first character of a file
Option C. The name of the file
Option D. The last character in the file
True Answer B

Explanation :

What does fp point to in the program?


int main()
{
FILE *fp;
fp=fopen("trial", "r");
return 0;
}

Question No# : 04 out of 20



If there is any error while opening a file, fopen will return

Option A. Nothing
Option B. EOF
Option C. NULL
Option D. Depends on compiler
True Answer C

Explanation :

If there is any error while opening a file, fopen will return

Question No# : 05 out of 20



End of file is detected by

Option A. fend( )
Option B. endf( )
Option C. EOF
Option D. FEND
True Answer C

Explanation :

End of file is detected by

Question No# : 06 out of 20

What is the function of fputs()?

Option A. read a line from a file
Option B. read a character from a file
Option C. write a character to a file
Option D. write a line to a file
True Answer D

Explanation :
The fputs() is used to write a line to a file. fputs() syntax can be written as int fputs(const char *str, FILE *stream);

What is the function of fputs()?

Question No# : 07 out of 20



The statement fopen("data.txt", "w+") will open a file named data.txt for both reading and writing.

Option A. TRUE
Option B. FALSE
Option C.
Option D.
True Answer A

Explanation :

The statement fopen("data.txt", "w+") will open a file named data.txt for both reading and writing.

Question No# : 08 out of 20

The fprintf() function can be used to display the output on the screen.

Option A. TRUE
Option B. FALSE
Option C.
Option D.
True Answer B

Explanation :

The fprintf() function can be used to display the output on the screen.

Question No# : 09 out of 20

EOF is an integer type defined in stdio. h and has a value

Option A. 1
Option B. 0
Option C. NULL
Option D. – 1
True Answer D

Explanation :
EOF is an integer type defined in stdio. hand has a value – 1

EOF is an integer type defined in stdio. h and has a value

Question No# : 10 out of 20



The first and second arguments of fopen are ______

Option A. A character string containing the name of the file & the second argument is the mode
Option B. A character string containing the name of the user & the second argument is the mode
Option C. A character string containing file poniter & the second argument is the mode
Option D. None of the mentioned
True Answer A

Explanation :

The first and second arguments of fopen are ______

Question No# : 11 out of 20



getc() returns EOF when

Option A. End of files is reached
Option B. When getc() fails to read a character
Option C. Both of the above
Option D. None of the above
True Answer C

Explanation :

getc() returns EOF when

Question No# : 12 out of 20



A command that lets you change one or more fields in a record is look up.

Option A. TRUE
Option B. FALSE
Option C.
Option D.
True Answer B

Explanation :

A command that lets you change one or more fields in a record is look up.

Question No# : 13 out of 20

If a file is open in ‘write’ mode, then

Option A. If it does not exist, an error is returned
Option B. If it does not exist, it is created
Option C. If it exists, then data is written at the end
Option D. If it exists, error is returned
True Answer B

Explanation :
In C, fopen() is used to open a file in different modes. To open a file in write mode, “w” is specified. When mode “w” is specified, it creates an empty file for output operations. If a file with the same name already exists, its contents are discarded and the file is treated as a new empty file.

If a file is open in ‘write’ mode, then

Question No# : 14 out of 20



In a multilist organisation

Option A. records that have an equivalent value for a given secondary index item are linked together to form a list
Option B. records are loaded in ordered sequence defined by collating sequence by content of key
Option C. records are directly accessed by records key field
Option D. none of the above
True Answer C

Explanation :

In a multilist organisation

Question No# : 15 out of 20

What is the purpose of getc()?

Option A. read a character from STDIN
Option B. read a character from a file
Option C. read all file
Option D. read file randomly
True Answer B

Explanation :

What is the purpose of getc()?

Question No# : 16 out of 20

Which one of the following is correct syntax for opening a file.

Option A. FILE *fopen(const *filename, const char *mode)
Option B. FILE *fopen(const *filename)
Option C. FILE *open(const *filename, const char *mode)
Option D. FILE open(const*filename)
True Answer A

Explanation :
fopen() opens the named file, and returns a stream, or NULL of the attempt fails.

Which one of the following is correct syntax for opening a file.

Question No# : 17 out of 20



Which of the following true about FILE *fp

Option A. FILE is a keyword in C for representing files and fp is a variable of FILE type.
Option B. FILE is a structure and fp is a pointer to the structure of FILE type
Option C. FILE is a stream
Option D. FILE is a buffered stream
True Answer B

Explanation :
fp is a pointer of FILE type and FILE is a structure that store following information about opened file.

Which of the following true about FILE *fp

Question No# : 18 out of 20



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

Option A. If it is not a macro, it may evaluate stream more than once
Option B. if it is amacro, it may not evaluate stream more than once
Option C. if it is a macro, it may evaluate stream more than once
Option D. no difference between fgetc() and getc()
True Answer C

Explanation :
getc() is equivalent to fgetc() except that if it is a macro, it may evaluate more than once.

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

Question No# : 19 out of 20



Which type of files can’t be opened using fopen()?

Option A. .txt
Option B. .bin
Option C. .c
Option D. none of the mentioned
True Answer D

Explanation :

Which type of files can’t be opened using fopen()?

Question No# : 20 out of 20