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Variable Names MCQ Questions and Answers

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Variables Name MCQ Questions and Answers on C Language and Online Test : here learn quiz questions on C Variables and download objective type questions and answers.

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1) Which of the following is not a valid variable name declaration?

    int __a3;
    int __3a;
    int __A3;
    None of the mentioned

Answer : D Discuss

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

    int _a3;
    int a_3;
    int 3_a;
    int _3a

Answer : C Discuss

3) 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 Discuss

4) All keywords in C are in

    LowerCase letters
    UpperCase letters
    CamelCase letters
    None

Answer : A Discuss

5) Variable name resolving (number of significant characters for uniqueness of variable) depends on

    Compiler and linker implementations
    Assemblers and loaders implementations
    C language
    None

Answer : A Discuss

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

    int number;
    float rate;
    int variable_count;
    int $main;

Answer : D Discuss

7) 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

Answer : C Discuss

8) Which is valid C expression?

    int my_num = 100,000;
    int my_num = 100000;
    int my num = 1000;
    int $my_num = 10000;

Answer : B Discuss

9) Which of the following is not a valid variable name declaration?

    float PI = 3.14;
    double PI = 3.14;
    int PI = 3.14;
    #define PI 3.14

Answer : D Discuss

10) What is the problem in following variable declaration?
float 3Bedroom-Hall-Kitchen?;

    The variable name begins with an integer
    The special character ‘-‘
    The special character ‘?’
    All of the mentioned

Answer : D Discuss

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