C++ Files Review

Which C++ library allows us to work with files?

• filestreams

• fstream

• string

• vector

Which class from the fstream library is used to create and write to files?

• ifstream

• ofstream

• fstream

• filemanager

Consider the following code. What will it do?

• Reads from filename.txt

• Creates a file but does not write anything

• Creates a file named filename.txt and writes 'Writing to a file.' into it

• Outputs 'Writing to a file.' on the console

Which class would you use to read from a file in C++?

• ofstream

• fstream

• ifstream

• filemanager

Consider the following code. What does it do?

• Reads the content of filename.txt and prints it on console

• Writes 'filename.txt' to the console

• Creates a file called filename.txt

• Deletes filename.txt

What is the primary purpose of the ifstream class in C++?

• To write data to files

• To read data from files

• To delete files

• To manage file permissions

Which of the following is a correct way to open a file for reading in C++?

• ofstream file('example.txt');

• ifstream file('example.txt');

• fstream file('example.txt', ios::out);

• filemanager file('example.txt');

If the input.txt file has the following numbers:

123 245 58 187 231 456 217

what will be the written into the output.txt file after the execution of the following program?

• 123 187 231 217

• 123 245 187 231 217

• 245 58 456

• 58 456