Deck 1: Java Programming Language

Question 1

Who is considered as the creator of JAVA ?

A)Dennis Richie
B)Ken Thompson
C)James Gosling
D)Bjarne Stroupstrup

Answer 1

James Gosling

Question 2

Which of the following statements about the Java language is true?

A)Java supports only Procedural Oriented Programming approach
B)Both Procedural and Object Oriented Programming are supported in Java
C)Java supports only Object Oriented Programming approach
D)None of the Above

Answer 2

Java supports only Object Oriented Programming approach

Question 3

JRE stands for

A)Java Realtime Environment
B)Java Rapid Enterprise
C)Java Runtime Environment
D)None of the above

Answer 3

Java Runtime Environment

Question 4

Java source files are compiled and converted to

A)Object code
B)machine code
C)Bytecode
D)executable file

Question 5

JVM is ___________for bytecode.

A)a compiler
B)an interpreter
C)assembler
D)none of the above

Question 6

What is the size of int data type in java?

A)1 bytes
B)2 bytes
C)4 bytes
D)8 bytes

Question 7

Which is a valid float literal?

A)1.23
B)2
C)1.23d
D)1.23f

Question 8

What is the numerical range of a char in Java?

A)-128 to 127
B)0 to 256
C)0 to 32767
D)0 to 65535

Question 9

Which of these coding types is used for data type char in Java?

A)ASCII
B)ISO-LATIN-1
C)UNICODE
D)None of the mentioned

Question 10

Which of these values can a boolean variable contain?

A)True & False
B)0 & 1
C)Any integer value.
D)Both a & b

Question 11

Which one of the following is a valid identifier in java?

A)x1
B)1x
C)$x
D)x 1

Question 12

Which operator is used to implement unsigned right shift of an integer?

A)<<
B)>>
C)<<<
D)>>>

Question 13

Which one of the following is a jump statement in java?

A)goto
B)jump
C)break
D)if

Question 14

Which of these operators is used to allocate memory to array variable in Java?

A)malloc
B)alloc
C)new
D)new malloc

Question 15

Which of the following loops will execute the body of loop even when condition controlling the loop is initially false?

A)do-while
B)while
C)for
D)None of the mentioned

Question 16

Which of these is necessary condition for automatic type conversion in Java?

A)The destination type is smaller than source type.
B)The destination type is larger than source type.
C)The destination type can be larger or smaller than source type.
D)None of the mentioned

Question 17

What is the error in this code?
Byte b = 50;
B = b * 50;

A)b can not store the result 2500, limited by its range.
B)* operator has converted b * 50 into int, which can not be converted to byte without casting.
C)b can not contain value 50.
D)No error in this code

Question 18

Which of these is an incorrect array declaration?

A)int arr[] = new int[5];
B)int [] arr = new int[5];
C)int arr[]; arr = new int[5];
D)int arr[] = int [5] new

Question 19

Which of these selection statements test only for equality?

A)if
B)switch
C)Both a & b
D)None of the mentioned

Question 20

Which of these are selection statements in Java?

A)if
B)for
C)continue
D)all of these

Question 21

Which of these jump statements can skip processing remainder of code in its body for a particular iteration?

A)break
B)return
C)exit
D)continue

Question 22

What is the value of the expression 2 & 3 ?

A)2
B)3
C)6
D)5

Question 23

What is the value of the expression 8 << 2 ?

A)2
B)32
C)1 6
D)5

Question 24

The keyword used to create a constant variable

A)const
B)static
C)final
D)none of these

Question 25

What is stored in the object obj in following lines of code?
Box obj;

A)Memory address of allocated memory of object.
B)NULL
C)Any arbitrary pointer
D)Garbage