Gateforum Test Series: Programming & DS - Programming In C

Question

Which of the statements are false about keyword ‘register’?

1. Register keyword can be used with a pointer variable as register can have address of memory location.
2. We can use '&’ operator with register variable and access address of register.
3. Register storage class can be used with static storage class
   
   A) only a  B) both a and c C) all of the above D) both b and c.

Can someone explain the choice a more clearly in the above question?

Comments

it simply means,

register int *p; ----------- this declaration is valid !

 

By the way, Option D is the answer, right?

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Thank You for clarification. Yes option D is correct.

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D is correct.

Answer 1

Register is small storage unit inside microprocessor so it can be used for calculation in c programming using keyword "register" e.g.,int register but trying to access the register address like we do in normal variables (eg.,&a that is in memory) will lead to unknown condition even lead to some complex issues or an fatal error