Quiz for File streams ifstream

Q1: Which class is used for reading from files in C++?

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

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

A. <fstream> B. <iostream> C. <fstreams> D. <istream>

Q3: How do you open a file named "data.txt" for reading using ifstream?

A. ifstream file("data.txt"); B. ifstream file.open("data.txt"); C. file.open("data.txt"); D. ifstream.open("data.txt");

Q4: How to check if a file was successfully opened using ifstream?

A. file.is_open() B. file.opened() C. file.isopen() D. file.open()

Q5: Which function reads a line of text from a file into a string?

A. getline() B. readline() C. get_line() D. read()

Q6: What happens if you try to open a non-existent file with ifstream?

A. ifstream opens and creates the file B. ifstream fails to open the file C. ifstream opens but file is empty D. ifstream throws an exception

Q7: How to close an ifstream object?

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

Q8: Which mode does ifstream open the file by default?

A. Write mode B. Read mode C. Append mode D. Read and write mode

Q9: Which operator can be used to read formatted data from ifstream?

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

Q10: What does eof() function indicate?

A. File opened successfully B. End of file reached C. File is empty D. File is corrupted

Q11: How to check if the last read operation failed?

A. fail() B. is_open() C. bad() D. good()

Q12: Which function can be used to ignore characters in a stream?

A. ignore() B. discard() C. skip() D. remove()

Q13: Which method returns the current position of the get pointer?

A. tellg() B. tellp() C. getpos() D. pos()

Q14: Which function moves the get pointer to a specified location?

A. seekg() B. seekp() C. seek() D. seekpos()

Q15: What is the default open mode for ifstream?

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

Q16: Can ifstream be used to write to files?

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

Q17: Which of these is NOT a member function of ifstream?

A. open() B. close() C. write() D. is_open()

Q18: How to check if a file stream is in a good state?

A. good() B. fail() C. eof() D. bad()

Q19: What is the typical use case of ifstream?

A. Reading input from files B. Writing output to files C. Both reading and writing D. Managing memory