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C programming short Questions with Answers

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C programming language quiz & multiple choice questions(mcqs) and answers are available to download in PDF for free. These short objective type questions with Answers are useful for preparations of competitive exams like CBSE NET, GATE, NIELIT, BCA, B.Sc. MCA, M.Sc. B.Tech, M.Tech, BE, ME etc.
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(41) Choose the option that contains only valid hexadecimal integers.
[A] 0x9F, 0xbcd, 0x1
[B] 037, 00x, 01000
[C] 0x561u, 0x9h, 0xdd
[D] H9F, HFF, HAA

Comment

Answer: Option [D]

The base of Hexadecimal number system is 16. It contains 0 to 9 and A,B,C.D,E,F to represent zero to fifteen.

(42) Which of the following is not valid variable names in 'C'?
[A] float_int, keyword, A1
[B] ANSI, ascii, cpu
[C] valid, variable, name
[D] None of these

Comment

Answer: Option [D]

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(43) The result of a relational operator is always
[A] either True or False
[B] is less than or is more than
[C] is equal or less or more
[D] All of these

Comment

Answer: Option [A]

The relational operators in 'C' are ==, !=, >, <, >=, <=. They always results in either True or False.

(44) Which of the following cannot be used as identifiers?
[A] Letters
[B] Digits
[C] Underscores
[D] Spaces

Comment

Answer: Option [D]

Variable name, function name, structure name etc. are called identifiers. Spaces are not used in names.

(45) What is the return type of ftell function?
[A] double
[B] int
[C] long
[D] float

Comment

Answer: Option [C]

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