C++ fstream Library Quiz

What is the base class for ifstream, fstream, and ofstream?

• filebuf

• fstreambase

• iostream

• streambuf

Which function in C/C++ checks if the end-of-file indicator is set for a given stream?

• ios::eof()

• feof()

• getc()

• getchar()

What does the "wb" file mode in C/C++ do?

• Opens a file for reading in binary mode.

• Opens a file for writing in binary mode, truncating its contents if it exists.

• Opens a file for appending in binary mode.

• Opens a file for exclusive creation in binary mode.

Which mode flag is used to open a file for reading in C++?

• ios::out

• ios::in

• ios::app

• ios::trunc

What is the purpose of the `ifstream` object in the given code example?

• To write data to a file

• To read data from a file

• To delete a file

• To create a new file

What is the output of the given code if the file "example.txt" contains the text "Hello, File I/O!" and "This is a new line."?

• Hello, File I/O! This is a new line.

• Error opening file!

• File successfully read.

• No output is displayed.

What is the value assigned to the variable `j` in the code?

• 6.02

• 'x'

• 77

• "File Handling"

What does the `ofstream outfile("fdata.txt");` statement do in the given code?

• Creates a new file named "fdata.txt" and writes data to it.

• Reads data from the file "fdata.txt".

• Deletes the file "fdata.txt" if it exists.

• Appends data to the file "fdata.txt".

Which line in the code is responsible for extracting data from the file?

• Line 15

• Line 16

• Line 17

• Line 19

What does the `cout` statement in the code do?

• Reads data from the file

• Displays data on the console

• Writes data to the file

• Creates a file object