Question

What is the use of symbol * in the control string as shown [=%[*][width] [modifiers] type=]?

(a) * is optional and used when the data should be read from the stream but ignored

(b) * is not optional, used to read data from the stream but it is not ignored

(c) * is not optional, it is used to read data stream but ignored

(d) * is optional and used to read data from stream but it is not ignored

I had been asked this question in an online interview.

Question is from scanf topic in division Input and Output in C of C

Answer 1

The correct choice is (a) * is optional and used when the data should be read from the stream but ignored

The best I can explain: * is an optional argument, it indicates that data should be read from the steam but ignored (not stored in a memory location)