Variable names beginning with underscore is not encouraged. Why?

Variable names beginning with underscore is not encouraged. Why?

It is not standardized

To avoid conflicts since assemblers and loaders use such names

To avoid conflicts since library routines use such names

To avoid conflicts with environment variables of an operating system

Answer : C

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1) Which is valid C expression?

int my_num = 100,000;

int my_num = 100000;

int my num = 1000;

int $my_num = 10000;

2) Which of the following is not a valid C variable name?

int number;

float rate;

int variable_count;

int $main;

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3) All keywords in C are in

LowerCase letters

UpperCase letters

CamelCase letters

None

4) Which of the following is true for variable names in C?

They can contain alphanumeric characters as well as special characters

It is not an error to declare a variable to be one of the keywords(like goto, static)

Variable names cannot start with a digit

Variable can be of any length

5) A constant cannot be used except:

For assigning initial value to a variable

With ++ operator

As a formal argument

On LHS of an assignment operator

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