Deck 4: Java Script Operators and Data Types

Question 1

Decrement operator, ??, decreases the value of variable by what number?

A)1
B)2
C)3
D)4

Answer 1

1

Question 2

Which right shift operator preserves the sign of the value?

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

Answer 2

>>

Question 3

What is the output of relational operators?

A)integer
B)boolean
C)characters
D)double

Answer 3

boolean

Question 4

. Which of these is returned by "greater than", "less than" and "equal to" operators?

A)integers
B)floating - point numbers
C)boolean
D)none of the mentioned

Question 5

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

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

Question 6

Which of the following is not a decision making statement?

A)if
B)if-else
C)switch
D)do-while

Question 7

Which of the following is not a valid flow control statement?

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

Question 8

What is the range of short data type in Java script ?

A)-128 to 127
B)-32768 to 32767
C)-2147483648 to 2147483647
D)none of the mentioned

Question 9

What is the range of byte data type in Java script?

A)-128 to 127
B)-32768 to 32767
C)-2147483648 to 2147483647
D)none of the mentioned

Question 10

An expression involving byte, int, and literal numbers is promoted to which of these?

A)int
B)long
C)byte
D)float

Question 11

What is the numerical range of a char data type in Java script?

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

Question 12

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

A)ascii
B)iso-latin-1
C)unicode
D)none of the mentioned

Question 13

Which one is a valid declaration of a Boolean?

A)boolean b1 = 1;
B)boolean b2 = 'false';
C)boolean b3 = false;
D)boolean b4 = 'true'

Question 14

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

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

Question 15

Which of these is an incorrect array declaration?

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

Question 16

Which of these is necessary to specify at time of array initialization?

A)row
B)column
C)both row and column
D)none of the mentioned

Question 17

Which of the following can be operands of arithmetic operators?

A)numeric
B)boolean
C)characters
D)both numeric & characters

Question 18

Modulus operator, %, can be applied to which of these?

A)integers
B)floating - point numbers
C)both integers and floating - point numbers
D)none of the mentioned

Question 19

Which operator is used to invert all the digits in a binary representation of a number?

A)~
B)<<<
C)>>>
D)^

Question 20

On applying Left shift operator, <<, on integer bits are lost one they are shifted past which position bit?

A)1
B)32
C)33
D)31

Question 21

Which of these operators can skip evaluating right hand operand?

A)!
B)none of the mentioned
C)&
D)&&

Question 22

Which of these statements are incorrect?

A)equal to operator has least precedence
B)<br>ackets () have highest precedence
C)division operator, /, has higher precedence than multiplication operator
D)addition operator, +, and subtraction operator have equal precedence

Question 23

Which of these selection statements test only for equality?

A)if
B)switch
C)if & switch
D)none of the mentioned

Question 24

. Which of these are selection statements in Java script?

A)if()
B)for()
C)continue
D)break