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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 to only write on files ?

  • ofstream
  • ifstream
  • fstream
  • iostream

Answer: Option A

2. How to get position n bytes forward in fileObject ?

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

Answer: Option C

3. Which stream class is to only read from files ?

  • ofstream
  • ifstream
  • fstream
  • iostream

Answer: Option B

4. How to get position to the nth byte of fileObject ?

  • fileObject.seekg( 'filename',n );
  • fileObject.seekg( n, 'filename' );
  • fileObject.seekg( n );
  • fileObject.seekg( n, ios::app );

Answer: Option C

5. Which functions allow to change the location of the get and put positions ?

  • sg() and sp()
  • sekg() and sekp()
  • gog() and gop()
  • seekg() and seekp()

Answer: Option D

Read more from - C++ File Handling Questions Answers
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