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QUIZ ON : JAVA - USING LIBRARY CLASSES
USING LIBRARY CLASSES
00:00:00
English
Hindi
Question No# :
01
out of 20
Math.random( ) returns a random number between 0 and 1 in decimal.
A.
TRUE
B.
FALSE
Question No# :
02
out of 20
Which among the following will yield -1 for negative number and 1 for positive number for a number stored in a variable a?
A.
Math.abs(a)*a
B.
Math.abs(a) / a
C.
Math.ceil(a) / Math.floor(a)
D.
None of these
Question No# :
03
out of 20
Which of the following is not a wrapper class?
A.
Byte
B.
Int
C.
Long
D.
Float
Question No# :
04
out of 20
Math.max( ) returns the number having maximum number of digits.
A.
TRUE
B.
FALSE
Question No# :
05
out of 20
What value will Math.sqrt(-9) return?
A.
-3.0
B.
3.0
C.
NaN
D.
None of these
Question No# :
06
out of 20
What value will Math.sqrt(Math.ceil(8.1)) return?
A.
9.0
B.
9
C.
3.0
D.
4.0
Question No# :
07
out of 20
Math.ceil() and Math.floor() are same.
A.
TRUE
B.
FALSE
Question No# :
08
out of 20
Which of the following is valid method of initialising?
A.
Integer a=new (5);
B.
Integer a=Integer(5);
C.
Integer a=new Integer(5);
D.
Integer a=new (“5”);
Question No# :
09
out of 20
Which among the following function is equivalent to Math.sqrt(a)?
A.
Math.cbrt(a);
B.
Math.pow(a,1/2)
C.
Math.pow(a,1/2.0);
D.
Math.
Question No# :
10
out of 20
Which among the following function is used to check whether a given character is a tab space or not?
A.
isTab()
B.
isTabSpace()
C.
isSpace()
D.
isWhitespace()
Question No# :
11
out of 20
Math. rint(12.5) will return 12.0.
A.
TRUE
B.
FALSE
Question No# :
12
out of 20
Which among the following methods return a true or a false?
A.
toLowerCase()
B.
toUpperCase()
C.
parseInt()
D.
isUpperCase()
Question No# :
13
out of 20
Which among the following class do not belong to the java.lang package?
A.
System
B.
String
C.
Math
D.
Scanner
Question No# :
14
out of 20
Which among the following package is imported by default:
A.
java.lang
B.
java.util
C.
Both a and b
D.
None of these
Question No# :
15
out of 20
Math.sqrt() function is used to find the square of a number.
A.
TRUE
B.
FALSE
Question No# :
16
out of 20
What is the return type of Math.min(1,2.0f)?
A.
float
B.
double
C.
int
D.
long
Question No# :
17
out of 20
Which among the following gives the next mathematical integer?
A.
Math.floor( )
B.
Math.ceil( )
C.
Math.random( )
D.
All of these
Question No# :
18
out of 20
Which among the following is valid character initialisation?
A.
Character c=new Character(‘c’);
B.
Character c=new Character(“c”);
C.
Both a and b
D.
None of these
Question No# :
19
out of 20
The member ‘out’ object of the ‘System’ class belongs to which class?
A.
System
B.
Print
C.
PrintStream
D.
Println
Question No# :
20
out of 20
Which among the following Scanner methods allows us to input a number with a decimal point?
A.
nextInt()
B.
nextFloat()
C.
nextDecimal()
D.
nextPoint()
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