JOIN ADRE 2.0 Telegram Group

Data Types in Java - MCQ Questions with Answers - Core Java Quiz

Questions
1 Which of the following is not an valid declaration of an array?
A int [ ] a = new int [3];
B int a [ ] [ ] = new int [3] [3]
C int [ ] [ ] a = new int [3] [ ];
D int [ ] [ ] a = new int [ ] [3];

Answer: Option [D]

In multidimensional array rows cannot left blank.

2 String.ValueOf('r').concat("def").concat(String.ValueOf('2'))
A 0
B 1
C 3
D 4

Answer: Option [B]
Advertisement
Article and Schedule Quiz Start Test!

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

3 Which of the following is correct statement?
A Boolean true value is 1 and false value is 0
B Every private class has a wrapper class
C Constant identifier precede with a reserved word final
D System.out.println() method also flushes the buffer

Answer: Option [C]

Constants are not directly supported by Java. The reserved 'Final' is used to declare constant.

4 Size of an integer can be
A -231 to 231-1
B 0 to -216
C -28 to 28-1
D -215 to 215-1

Answer: Option [A]

Int takes 4 bytes i.e. 32bits. 1 bit is reserved to store sign.

5 For which of the following data types the ValueOf() method is NOT overloaded in the string class?
A Float
B Boolean
C Object
D None of these

Answer: Option [D]

For all Java built in types ValueOf() method is overloaded within the String. valueOf() method returns the string representation of the corresponding arguments value.

ADRE 2.0 FULL LENGTH MOCK TEST

Take Mock Tests

Missiles Mock Test Start Test!
SSC MTS Mock Test Start Test
IBPS CLERK MOCK TEST Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH) Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi) Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH) Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH) Start Test!
IB Security Assistant Mock test 1 (english) Start Test!
UP POLICE CONSTABLE MOCK TEST 1 Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI) Start Test!

Chapters

Advertisement
Assam Direct Recruitment Test Series

Latest Test Series

ssc cgl test series

SSC CGL

Start Test 1000+ Tests Latest patternView Course
delhi policesi test series

DELHI POLICE SI

Start Test 1000+ Tests Latest patternView Course
west bengal psc test series

WEST BENGAL PSC

Start Test 1000+ Tests Latest patternView Course
cisf head constable test series

CISF CONSTABLE

Start Test 1000+ Tests Latest patternView Course
Junior Associate of the Indian Institute of Bankers(JAIIB) test series

JAIIB

Start Test 30 Full Length Tests View Course
adre 2024 test series

ADRE 2024

Start Test 25000+ QUESTIONS SOLUTIONSView Course
RRB RRC GROUP D test series

RRB RRC GROUP D

Start Test 15000+ QUESTIONS Latest patternView Course
UP POLICE SI test series

UP POLICE SI

Start Test 16000+ QUESTIONS Latest patternView Course
CLICK HERE TO VIEW ALL COURSES