C Questions and Answers – File Operations – 1

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “File Operations – 1”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

1. Which one of the following is correct syntax for opening a file.
a) FILE *fopen(const *filename, const char *mode)
b) FILE *fopen(const *filename)
c) FILE *open(const *filename, const char *mode)
d) FILE open(const*filename)
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2. What is the function of the mode ‘ w+’?
a) create text file for writing, discard previous contents if any
b) create text file for update, discard previous contents if any
c) create text file for writing, do not discard previous contents if any
d) create text file for update, do not discard previous contents if any
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3. If the mode includes b after the initial letter, what does it indicates?
a) text file
b) big text file
c) binary file
d) blueprint text
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4. fflush(NULL) flushes all ____________
a) input streams
b) output streams
c) previous contents
d) appended text
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5. _____removes the named file, so that a subsequent attempt to open it will fail.
a) remove(const *filename)
b) remove(filename)
c) remove()
d) fclose(filename)
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6. What is the function of FILE *tmpfile(void)?
a) creates a temporary file of mode “wb+”
b) creates a temporary file of mode “wb”
c) creates a temporary file of mode ” w”
d) creates a temporary file of mode “w+”
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7. What does tmpfile() returns when it could not create the file?
a) stream and NULL
b) only stream
c) only NULL
d) does not return anything
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8. Choose the right statement for fscanf() and scanf()
a) fscanf() can read from standard input whereas scanf() specifies a stream from which to read
b) fscanf() can specifies a stream from which to read whereas scanf() can read only from standard input
c) fscanf() and scanf() has no difference in their functions
d) fscanf() and scanf() can read from specified stream
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9. EOF is an integer type defined in stdio. hand has a value ____________
a) 1
b) 0
c) NULL
d) – 1
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10. fwrite() can be used only with files that are opened in binary mode.
a) true
b) false
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