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Study and learn Java MCQ Questions and Answers on Bitwise Operators and their priorities. Attend job interviews easily with these Multiple Choice Questions. You can print these Questions in default mode to conduct exams directly. You can download these MCQs in PDF format by Choosing Print Option first and Save as PDF option next using any Web Browser.
Go through Java Theory Notes on Bitwise Operators before reading these objective questions.
1)
What is the output of the Java program?
byte
b = 0b0000101;
System.out.print(b
+ ",");
b
&= 0b00001111;
System.out.print(b);
A)
5, 0
B)
5,5
C)
5,15
D)
None
Answer
[=]
B
Explanation:
0101
& 1111 = 0101. &= is a Bitwise AND Shorthand Assignement operator.
2)
What is the output of the Java program?
byte
b = 0b00000101;
System.out.print(b
+ ",");
b
|= 0b00001111;
System.out.print(b);
A)
5,0
B)
5,5
C)
5,15
D)
Compiler error
Answer
[=]
C
Explanation:
|=
is a Bitwise OR Shorthand Assignment operator.
a
|= b ---> a = a|b;
3)
What is the output of the Java Program?
byte
b = 0b00000101;
System.out.print(b
+ ",");
b
^= 0b00001111;
System.out.print(b);
A)
5,0
B)
5,5
C)
5,10
D)
5,15
Answer
[=]
C
Explanation:
Bitwise
exclusive OR produces 1 for different Inputs
and
0 for the same Inputs.
0101
^1111
------
1010
4)
What is the output of the Java program?
byte
b = 0b00000101;
System.out.print(b
+ ",");
b
= (byte)~b;
System.out.print(b);
A)
5, 10
B)
5, -10
C)
5. -6
D)
Compiler error
Answer
[=]
C
Explanation:
Bitwise
NOT(~) operator turns 1s to 0s
and
0s to 1s. If the leftmost bit is 1,
it
is a negative number.
So
take 1's complement and add 1 to it.
~0000
0101 =
1111 1010
-----------
~
111 1010 =
000 0101
-----------
000 0101
000 0001 +
-----------
-
000 0110
5)
What is the output of the Java program with Left Shift Operator (<<)?
byte
b = 0b00000101;
System.out.print(b
+ ",");
b
= (byte)(b << 1);
System.out.print(b);
A)
5,2
B)
5,5
C)
5,10
D)
Compiler error
Answer
[=]
C
Explanation:
Left
Shift 1 bit.
Before:
0000
0101
After:
left
0 removed <-- 0 [000 0 101 0] <--- 0 added at right
=0000
1010
6)
What is the output of Java program with Right Shift Operator (>>)?
byte
b = 0b00000101;
System.out.print(b
+ ",");
b
= (byte)(b >> 1);
System.out.print(b);
A)
5,-6
B)
5,10
C)
5, 2
D)
Compiler error
Answer
[=]
C
Explanation:
Right
Shift Operator shifts bits rightside.
Fills
0s on the left side.
Before:
0000
0101
After
[0
0000 010]1
=
0000 0010
7)
What is the output of the Java program with Right Shift (Without Fill Zeroes)?
byte
num = (byte)0b1111_1000;
System.out.print(num
+ ",");
num
= (byte)(num >> 1);
System.out.print(num);
A)
-8, -16
B)
-4, -8
C)
-8, -4
D)
Compiler error
Answer
[=]
C
Explanation:
1111_1000
==
~111
1000 + 1
=
000 0111 + 1
=
000 1000
=
-8
-8
>> 1
=
1111_1100
=
~ 111 1100 + 1
=
000 0011 + 1
=
000 0100
=
-4
8)
What is the output of a Java Program with Shift Right Fill Zeroes
(>>>) operator?
byte
num = (byte)0b1111_1000;
System.out.print(num
+ ",");
num
= (byte)(num >>> 1);
System.out.print(num);
A)
-8, 8
B)
-8, 4
C)
-8, -4
D)
Compiler error
Answer
[=]
C
Explanation:
In
this case, >> and >>> produce the same output. A negative number
is a negative number only.
9)
What is the output of Java Program with Shift Right Fill Zeroes operator?
byte
num = (byte)0b000_1000;
System.out.print(num
+ ",");
num
= (byte)(num >>> 1);
System.out.print(num);
A)
-8, 4
B)
8, 4
C)
8, -4
D)
-8, -4
Answer
[=]
B
10)
What is the output of the Java program?
byte
num = (byte)0b000_1000;
if(num
>> 1 > 6)
{
System.out.print(num);
}
else
{
System.out.println(num>>1);
}
A)
8
B)
6
C)
4
D)
Compiler error
Answer
[=]
C
Explanation:
(num>>1)>6
4
> 6 = false
11)
What is the output of the Java Program?
byte
num = (byte)0b000_1000;
if(num
>> 1 > 6 || true)
{
System.out.print(num);
}
else
{
System.out.println(num>>1);
}
A)
8
B)
6
C)
4
D)
2
Answer
[=]
A
Explanation:
Logical
OR (||) is executed at last.
(4>6)
|| true = false||true
=
true
12)
What is the output of the Java program?
byte
num = (byte)0b000_1000;
if(num
>> 1 > 6 || true | 2>3)
{
System.out.print(num+1);
}
else
{
System.out.println(num>>2);
}
A)
8
B)
6
C)
9
D)
Compiler error
Answer
[=]
C
Explanation:
Each
logic block is evaluated separately as it has less priority.
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