C Language MCQ - English
Which of the following is not a valid variable name declaration?
int __a3;
int __3a;
int __A3;
None of the mentioned
Answer : D
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1) 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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2) Which of following is not a valid name for a C variable?
3) In case of ordinary int variables:
The leftmost bit is reserved for sign
The rightmost bit is reserved for sign
No bit is reserved for sign
None of the above
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4) Which of the following cannot be a variable name in C?
5) 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
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