Quiz for File streams fstream

Q1: Which class allows both reading and writing to files?

A. ifstream B. ofstream C. fstream D. iostream

Q2: Which header file must be included to use fstream?

A. <fstream> B. <iostream> C. <fstreams> D. <stdio.h>

Q3: How do you open a file named "data.txt" for both reading and writing using fstream?

A. fstream file("data.txt", ios::in | ios::out); B. fstream file("data.txt", ios::in); C. fstream file("data.txt"); D. fstream file("data.txt", ios::out);

Q4: What mode should be used to append data when opening a file with fstream?

A. ios::app B. ios::trunc C. ios::in D. ios::out

Q5: Which function is used to check if the file stream is open?

A. is_open() B. open() C. isopen() D. check()

Q6: What happens if you open an existing file with ios::trunc flag?

A. File is appended B. File is truncated (cleared) C. File is read-only D. File is locked

Q7: Which operator is used to write data to a file with fstream?

A. >> B. << C. == D. =

Q8: Which operator is used to read data from a file with fstream?

A. >> B. << C. == D. =

Q9: How to close a file stream object?

A. close() B. closefile() C. file.closefile() D. file.close();

Q10: Which method flushes the output buffer to the file?

A. flush() B. clear() C. reset() D. sync()

Q11: How to reposition the file pointer to the beginning?

A. seekg(0) B. seekp(0) C. seek(0) D. rewind()

Q12: How to reposition the write pointer to the beginning?

A. seekg(0) B. seekp(0) C. seek(0) D. rewind()

Q13: What does ios::binary mode mean when opening files?

A. Text file mode B. Binary file mode C. Append mode D. Read-only mode

Q14: Can fstream be used to read from and write to the same file simultaneously?

A. Yes B. No C. Only in append mode D. Only with special flags

Q15: Which of the following is NOT a valid open mode flag?

A. ios::in B. ios::out C. ios::readwrite D. ios::app

Q16: What is the default mode when opening fstream without specifying flags?

A. ios::in B. ios::out C. ios::in | ios::out D. ios::app

Q17: How to enable exceptions for a file stream?

A. file.exceptions(ios::failbit | ios::badbit); B. file.set_exception(); C. file.exception_mask(true); D. file.throw_exceptions(true);

Q18: Which function returns the current position of the get pointer?

A. tellg() B. tellp() C. posg() D. post()

Q19: Which function returns the current position of the put pointer?

A. tellg() B. tellp() C. posp() D. post()