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ios::trunc is used for ?

  • If the file is opened for output operations and it already existed, no action is taken.
  • If the file is opened for output operations and it already existed, its previous content is deleted and replaced by the new one.
  • If the file is opened for output operations and it already existed, then a new copy is created.
  • None of above

Answer: Option B

Similar Questions :

1. Which stream class is used to both read and write on files ?

  • ofstream
  • ifstream
  • fstream
  • iostream

Answer: Option C

2. ios::trunc is used for ?

  • If the file is opened for output operations and it already existed, no action is taken.
  • If the file is opened for output operations and it already existed, its previous content is deleted and replaced by the new one.
  • If the file is opened for output operations and it already existed, then a new copy is created.
  • None of above

Answer: Option B

3. Which is correct syntax ?

  • myfile:open ("example.bin", ios::out);
  • myfile.open ("example.bin", ios::out);
  • myfile::open ("example.bin", ios::out);
  • myfile.open ("example.bin", ios:out);

Answer: Option B

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

  • True
  • False

Answer: Option A

5. offset counted from the current position using ?

  • ios::curr
  • ios::cr
  • ios::cur
  • ios::current

Answer: Option C

Read more from - C++ File Handling Questions Answers
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