Quiz for Reading and writing binary files

Q1: Which function is used to open a binary file for reading?

A. fopen() with mode "rb" B. fopen() with mode "r" C. fopen() with mode "wb" D. fopen() with mode "a"

Q2: Which function reads data blocks from a binary file?

A. fread() B. fgets() C. fscanf() D. fgetc()

Q3: Which function writes data blocks to a binary file?

A. fwrite() B. fputs() C. fputc() D. fprintf()

Q4: How do you open a binary file for writing (overwrite mode)?

A. fopen() with mode "wb" B. fopen() with mode "w" C. fopen() with mode "rb" D. fopen() with mode "a"

Q5: How do you open a binary file for appending data?

A. fopen() with mode "ab" B. fopen() with mode "a" C. fopen() with mode "rb" D. fopen() with mode "wb"

Q6: What does fread() return on success?

A. Number of elements successfully read B. EOF C. NULL D. Zero

Q7: What is a major difference between fread() and fscanf()?

A. fread() reads raw bytes, fscanf() reads formatted text B. fread() reads text, fscanf() reads bytes C. Both read formatted text D. No difference

Q8: Which mode is used with fopen() to read and write binary files?

A. "rb+" B. "r+" C. "w+" D. "rw"

Q9: How to move the file pointer in a binary file?

A. fseek() B. rewind() C. fclose() D. fflush()

Q10: What happens if you write to a binary file opened in "rb" mode?

A. Error or undefined behavior B. Data is appended C. File is truncated D. Nothing happens

Q11: Which function closes a binary file?

A. fclose() B. fflush() C. fend() D. close()

Q12: How can you check end of file for a binary file?

A. Using feof() B. Using EOF constant C. Using NULL D. Using NULL pointer

Q13: Can binary files contain text data?

A. Yes, but usually they contain non-text data B. No, binary files only contain code C. No, only text files can have text D. Yes, always

Q14: Which header file is required for file handling functions?

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

Q15: Which function flushes the output buffer to a binary file?

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

Q16: What is the return type of fread() and fwrite()?

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

Q17: How do you write an integer variable to a binary file?

A. Use fwrite(&var, sizeof(int), 1, fp) B. Use fprintf(fp, "%d", var) C. Use fputs() D. Use fwrite(var, 1, sizeof(int), fp)

Q18: How do you read an integer variable from a binary file?

A. Use fread(&var, sizeof(int), 1, fp) B. Use fscanf(fp, "%d", &var) C. Use fgets() D. Use fread(var, 1, sizeof(int), fp)

Q19: What is the advantage of binary file over text file?

A. Faster I/O and more compact storage B. More human readable C. Easier to edit D. No difference