Question Detail

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
Similar Questions :

1. Which among is used for positioning relative to the beginning of a stream ?

  • ios::start
  • ios::beg
  • ios::begin
  • ios::beginning

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

3. How to find the position at end of fileObject ?

  • fileObject.seekg( 0, ios::end );
  • fileObject.seekg( 0, ios::end );
  • fileObject.seekg( 0, ios::end );
  • fileObject.seekg( 0, ios::end );

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

  • fileObject.seekg(ios::end, n);
  • fileObject.seekg(n, ios:end );
  • fileObject.seekg(n, ios::end );
  • fileObject.seekg(ios:end, n);

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

  • ofstream
  • ifstream
  • fstream
  • iostream
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