Question Detail

Which among following is used to open a file in binary mode ?

ios:app
ios::out
ios::in
ios::binary

Answer: Option D

Explanation:

ios:app -> All output operations are performed at the end of the file, appending the content to the current content of the file.

ios::out -> Open for output operations.

ios::in -> Open for input operations.

1. 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);

Answer: Option C

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 among following is correct syntax of closing a file in c++ ?

myfile$close();
myfile@close();
myfile:close();
myfile.close();

Answer: Option D

4. Which stream class is to only write on files ?

ofstream
ifstream
fstream
iostream

Answer: Option A

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

True
False

Answer: Option A