Question

which of the following is an invalid variable name in C ? a Register b RegIster c register d register ​

Answer 1

Answer:

d. register

Explanation:

Hopes it help

Answer 2

Concept:

Keywords are reserved terms in programming that have a specific meaning for the compiler. Keywords are part of the syntax and can't be utilized as an identifier.

Find:

Which of the following is an invalid variable name in C ?

a) Register

b) RegIster

c) register

d) register ​

Solution:

The register variables are declared using the "register" keyword.

Register variables instruct the compiler to store a variable in a CPU register rather than memory. Variables that are often used are stored in registers and are quicker to access. We cannot obtain addresses of these variables.

As "register" is a keyword in C, therefore we cannot use it as a variable name.

Therefore, "register" is an invalid variable name in C.