Current Affairs Quiz 2024GKCourses UGC NETADRE 2.0English

Data Types and Variables - Multiple Choice Questions with Answers on Core Java

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Objective questions and answers set with five mcqs on Java Datatypes, Variables & arrays. Each quiz multiple choice question has 4 options as possible answer. Choose one and view given correct answer.
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(11) Which one does not have a valueOf(String) method?
[A] Integer
[B] Boolean
[C] Long
[D] Short

Comment

Answer: Option [D]

Java Data Type Short does not have a ValueOf(String) method. The other data types Integer, Boolean, Long, Char, Float, Double have support for the ValueOf(String) method.

(12) Which of the following is NOT an example of a data type?
[A] int
[B] public
[C] boolean
[D] double

Comment

Answer: Option [B]

public is not a data type. It is a Java Access modifier. The other Access modifiers are private and protected.

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(13) Int, long, byte, short are the data types of _____data types?
[A] unsigned
[B] signed
[C] both [A] and [B]
[D] None of these

Comment

Answer: Option [B]
(14) Which of the following is correct?
[A] int a = 16, a>>2 = 4
[B] int b = -8, b>>1 = -4
[C] int a = 16, a>>>2 = 4
[D] All of the above

Comment

Answer: Option [D]
(15) Which of the following is the mutable wrapper class?
[A] Integer
[B] BigInteger
[C] Boolean
[D] Character

Comment

Answer: Option [B]

Java wrapper classes are immutable. BiInteger are mutable.

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