QUIZ ON : PROGRAMMING AND PROBLEM SOLVING THROUGH PYTHON - FILE PROCESSING

FILE PROCESSING

00:00:00

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# : 01 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# : 02 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# : 03 out of 20

What is the function of the mode ‘ w+’?

Option A. create text file for writing, discard previous contents if any
Option B. create text file for update, discard previous contents if any
Option C. create text file for writing, do not discard previous contents if any
Option D. create text file for update, do not discard previous contents if any
True Answer B

Explanation :
w+ is a mode used to open a text file for update (i. e., writing and reading), discard previous contents if any.

What is the function of the mode ‘ w+’?

Question No# : 04 out of 20



Using fprintf function, we can print on the standard output device.

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

Explanation :

Using fprintf function, we can print on the standard output device.

Question No# : 05 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# : 06 out of 20



FILE is of type ______

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

Explanation :

FILE is of type ______

Question No# : 07 out of 20



The value of EOF is_____

Option A. -1
Option B. 0
Option C. 1
Option D. 10
True Answer A

Explanation :

The value of EOF is_____

Question No# : 08 out of 20



If the mode includes b after the initial letter, what does it indicates?

Option A. text file
Option B. big text file
Option C. binary file
Option D. blueprint text
True Answer C

Explanation :
If the mode consists of letter b after the first letter as in, “rb” or “w+b”, it indicates binary file.

If the mode includes b after the initial letter, what does it indicates?

Question No# : 09 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# : 10 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# : 11 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# : 12 out of 20



In relational schema each tuple is divided into fields called relations.

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

Explanation :

In relational schema each tuple is divided into fields called relations.

Question No# : 13 out of 20

fseek() should be preferred over rewind() mainly because

Option A. rewind() doesn't work for empty files
Option B. rewind() may fail for large files
Option C. In rewind, there is no way to check if the operations completed successfully
Option D. All of the above
True Answer C

Explanation :

fseek() should be preferred over rewind() mainly because

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

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# : 16 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# : 17 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# : 18 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# : 19 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# : 20 out of 20




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