File Input and Output in C

What is a file in C programming?

• A pointer to memory

• A collection of characters stored on disk

• A data type

• A library function

Which of the following is true about text files?

• They store data in binary form

• They are readable by text editors

• They cannot use fprintf()

• They use fread() to read data

Binary files are typically used when:

• We want human-readable data

• We want to store structured data efficiently

• We need to print text

• We use scanf()

What does the FILE* pointer in C represent?

• File descriptor

• File status

• File stream

• Memory buffer

Which function is used to open a file in C?

• fopen()

• open()

• read()

• getfile()

What is the correct way to close a file?

• fcloseall(fp);

• fileclose(fp);

• fclose(fp);

• close(fp);

Which of the following can be used to write formatted data to a file?

• fprintf()

• scanf()

• getc()

• puts()

Which function reads a string from a file?

• fgets()

• fscanf()

• fread()

• Both a and b

Which function checks for the end of file?

• fstatus()

• feof()

• ferror()

• fileend()

What does ferror(fp) return if there is a file error?

• 1

• 0

• EOF

• NULL