Exercise :: Input / Output - Yes / No Questions
| 1. | stderr, stdin, stdout are FILE pointers |
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Answer: Option A Explanation: Yes, these will be declared like The corresponding stdio.h variable is FILE* stdin; The corresponding stdio.h variable is FILE* stdout; The corresponding stdio.h variable is FILE* stderr; |
| 2. | A file written in text mode can be read back in binary mode. |
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Answer: Option B Explanation:
The difference is that text files contain lines (or records) of text and each of these has an end-of-line marker automatically appended to the end of it whenever you indicate that you have reached the end of a line. Binary files are not broken up into separate lines or records so the end-of line marker is not written when writing to a binary file. So, we cannot read the correct the data in binary mode. |
| 3. | Will the following program work? |
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Answer: Option A Explanation: It prints n= 5 |
| 4. | Can we specify a variable filed width in a scanf() format string? |
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Answer: Option B Explanation: In scanf() a * in a format string after a % sign is used for the suppression of assignment. That is, the current input field is scanned but not stored.
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