Quiz for Random file access ftell

Q1: What is the purpose of the ftell() function?

A. To get the current position of the file pointer B. To move the file pointer C. To close the file D. To open a file

Q2: Which header file is required to use ftell()?

A. <stdio.h> B. <stdlib.h> C. <string.h> D. <ctype.h>

Q3: What is the return type of ftell()?

A. long int B. int C. size_t D. void

Q4: What does ftell() return on failure?

A. -1L B. 0 C. EOF D. NULL

Q5: Which of the following correctly calls ftell()?

A. ftell(fp) B. ftell() C. ftell(fp, offset) D. ftell(offset)

Q6: If ftell() returns 0, where is the file pointer?

A. At the beginning of the file B. At the end of the file C. At the middle of the file D. Undefined position

Q7: Is ftell() useful for random access in files?

A. Yes, it helps get current position B. No, it only works sequentially C. No, it is used for opening files D. No, it is used for closing files

Q8: Can ftell() be used with text files?

A. Yes, but behavior can vary between platforms B. No, only binary files C. Yes, always the same behavior D. No, use fseek() instead

Q9: Which function can be used with ftell() to move file pointer?

A. fseek() B. fread() C. fwrite() D. fclose()

Q10: What is the value returned by ftell() if the file pointer is at byte 100?

A. 100 B. 0 C. -1 D. EOF

Q11: Which of the following is TRUE about ftell()?

A. It returns the current offset in the file B. It moves the file pointer C. It closes the file D. It opens the file

Q12: What happens if ftell() is called with an invalid FILE pointer?

A. Returns -1L indicating error B. Returns 0 C. Returns EOF D. Causes program to crash

Q13: Can ftell() be used to determine file size?

A. Not directly, but combined with fseek() B. Yes, it returns file size C. No, it only reads data D. No, it writes data

Q14: Which function returns the current file position after reading data?

A. ftell() B. fread() C. fwrite() D. fseek()

Q15: If ftell() returns a negative value, what does it mean?

A. An error occurred B. Start of file C. End of file D. Middle of file

Q16: Can ftell() be used on a file opened in write-only mode?

A. Behavior is undefined B. Yes, returns position C. No, causes error D. Yes, always zero

Q17: What value does ftell() return after opening a file in read mode, before any reading?

A. 0 B. -1 C. EOF D. 1

Q18: Is ftell() a standard C library function?

A. Yes B. No C. Only on Unix systems D. Only on Windows systems

Q19: Which data type should you store the value returned by ftell() in?

A. long int B. int C. size_t D. char