Question

The automatic variables _________________________

(a) Must be declared after its use

(b) Must be declared before using

(c) Must be declared, can be anytime

(d) Must not be initialized

I have been asked this question at a job interview.

This key question is from Automatic Variable topic in chapter Memory Allocation & Scope of Variable of Object Oriented Programming

Answer 1

Right option is (b) Must be declared before using

For explanation: All the automatic variables in a program must be declared before their use. The compiler won’t allow any use of variable if those are not declared before their use.