MCQ - File Handling in C++ Programming

21. If we have object from ofstream class, then default mode of opening the file is _____

A. ios::in
B. ios::out
C. ios::in|ios::trunc
D. ios::out|ios::trunk

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22. Which is correct syntax for, position n bytes back from end of fileObject ?

A. FileObject.seekg(ios::end, n);
B. FileObject.seekg(n, ios:end );
C. FileObject.seekg(n, ios::end );
D. FileObject.seekg(ios:end, n);

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23. When fopen() is not able to open a file, it returns

A. EOF
B. Null
C. Runtime error
D. Compiler dependent

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24. By default, all the files are opened in which of the following mode?

A. Binary Mode
B. Text Mode
C. Sequential Mode
D. Both A and B

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25. How many objects are used for input and output to a string?

A. 1
B. 2
C. 3
D. 4

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26. Calling the stream's member function sync() causes an immediate synchronization.

A. Yes
B. NO
C. May Be
D. Can't Say

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27. Which of the following is not used to seek a file pointer?

A. ios::cur
B. ios::beg
C. ios::end
D. ios::set

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

A. In rewind, there is no way to check if the operations completed successfully
B. rewind() doesn't work for empty files
C. rewind() does work for empty file
D. All of the above

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29. Which function is used to position back from the end of file object?

A. Seekg
B. Seekp
C. Both seekg & seekp
D. None of the above

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