1. Which of the following the is the correct declaration for ungetc?
a) int ungetc(int c, FILE fp);
b) int ungetc(int *c, FILE fp);
c) int ungetc(int c, FILE *fp);
d) int ungetc(int *c, FILE *fp);
Answer
Answer: c [Reason:] None.
2. Which of the following cannot be used with ungetc?
a) scanf
b) getc
c) getchar
d) printf
Answer
Answer: d [Reason:] None.
3. What does the ungetc function return for the following expression?
ungetc(c, fp);//where declarations are int c and FILE *fp
a) It returns character c
b) It returns EOF for an error
c) Both returns character c and returns EOF for an error
d) Either returns character c or returns EOF for an error
Answer
Answer: d [Reason:] None.
4. int ungetc(int c, FILE *fp) returns
a) Either c or EOF for an error
b) Nothing
c) fp
d) None of the mentioned
Answer
Answer: a [Reason:] None.
5. Only _____character of pushback is guaranteed per file when ungetc is used.
a) Two
b) One
c) Many
d) Zero
Answer
Answer: b [Reason:] None.
6. ungetc may be used with
a) scanf
b) getc
c) getchar
d) all of the mentioned
Answer
Answer: d [Reason:] None.
7. The syntax for ungetc is
a) void ungetc(int c, FILE *fp)
b) int ungetc(int c, FILE *fp)
c) int ungetc(String c, FILE *fp)
d) int getc(int c, FILE *fp)
Answer
Answer: b [Reason:] None.
