C | File Handling | Question 1

Which of the following true about FILE *fp
(A) FILE is a keyword in C for representing files and fp is a variable of FILE type.
(B) FILE is a structure and fp is a pointer to the structure of FILE type
(C) FILE is a stream
(D) FILE is a buffered stream


Answer: (B)

Explanation: fp is a pointer of FILE type and FILE is a structure that store following information about opened file.

typedef struct {
  int level; /* fill/empty level of buffer */
  unsigned flags; /* File status flags */
  char fd; /* File descriptor */
  unsigned char hold; /* Ungetc char if no buffer */
  int bsize; /* Buffer size */
  unsigned char *buffer; /* Data transfer buffer */
  unsigned char *curp; /* Current active pointer */
  unsigned istemp; /* Temporary file indicator */
  short token; /* Used for validity checking */
}FILE;

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