Quiz for File operations putc

Q1: What does the putc() function do?

A. Writes a character to a file stream B. Reads a character from a file stream C. Closes a file stream D. Opens a file stream

Q2: Which header file declares putc()?

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

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

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

Q4: What does putc() return on error?

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

Q5: Can putc() be used with stdout?

A. Yes, putc('A', stdout) writes character to console B. No, only files C. Only with fopen D. Only with fclose

Q6: Is putc() a macro or function?

A. Implementation dependent, often macro B. Always function C. Always macro D. Neither

Q7: Which function is similar to putc()?

A. fputc() B. getc() C. fgetc() D. puts()

Q8: How to check for errors after putc()?

A. Compare return value with EOF constant B. Check for zero C. Check for NULL D. Check for -1 only

Q9: What type of data does putc() write?

A. A single character B. A line of text C. An integer D. A string

Q10: Can putc() write binary data?

A. Yes, it writes one byte at a time B. No, only text files C. Only formatted data D. Only ASCII files

Q11: Which is the correct syntax for putc()?

A. putc(ch, fp) B. putc() C. putc(fp, ch) D. putc(&fp)

Q12: What happens to file pointer after putc()?

A. Advances by one byte B. Remains same C. Moves back D. Moves to file start

Q13: Is putc() buffered?

A. Yes, writes to internal buffer B. No, writes directly to disk C. Depends on compiler D. Only in Linux

Q14: What is the difference between putc() and putchar()?

A. putc() writes to any FILE*, putchar() writes to stdout B. No difference C. putc() writes lines, putchar() writes chars D. putc() reads, putchar() writes

Q15: Can putc() cause errors if file is not opened?

A. Yes, results in undefined behavior B. No, safe always C. Returns zero D. Returns EOF

Q16: What is the equivalent function to putc() for input?

A. getc() B. fgetc() C. printf() D. gets()

Q17: Does putc() support wide characters?

A. No, it writes single-byte chars B. Yes, always C. Only on Windows D. Only with special flags

Q18: How do you flush output buffer after putc()?

A. Use fflush() on file stream B. Use ferror() C. Use fclose() only D. No need to flush

Q19: Which of the following is a valid use of putc()?

A. putc('A', fp); B. putc(fp, 'A'); C. putc(&fp, 'A'); D. putc();