Java
Operators
Interview Questions With Answers
Operators
Q :1 What are operators and what are the various types of operators
available in Java?
Ans: Operators are special symbols used in expressions. The following are
the types of operators:
1.Arithmetic operators,
2.Assignment operators
3.Increment & Decrement operators
4.Logical operators
5.Bitwise operators
6.Comparison/Relational operators
7.Conditional operators
Q :2) The ++ operator is used for incrementing and the -- operator is used
for
decrementing.
a)True
b)False
Ans: a.
Q :3) Comparison/Logical operators are used for testing and magnitude.
a)True
b)False
Ans:a.
Q :4) Character literals are stored as unicode characters.
a)True
b)False
Ans: a.
Q :5) What are the Logical operators?
Ans: OR(|), AND(&), XOR(^) AND NOT(~).
Q :6) What is the % operator?
Ans: The % operator is the modulo operator or reminder operator. It returns
the reminder of dividing the first operand by second operand.
Q :7) What is the value of 111 % 13?
a.3
b.5
c.7
d.9
Ans: c.
Q :8) Is &&= a valid operator?
Ans: No.
Q :9) Can a double value be cast to a byte?
Ans: Yes
Q :10) Can a byte object be cast to a double value ?
Ans: No. As an object cannot be cast to a primitive
value and here we are casting byte object into double.
Q :11) What are order of precedence and associatively?
Ans: The Order of precedence the order in which operators are evaluated in
expressions.
Associatively determines whether an expression is evaluated left-right or
right-left.
Q :12) Which Java operator is right associatively?
Ans: Java support = operator.
Q :13) What is the difference between prefix and postfix of -- and ++
operators?
Ans: The prefix form returns the increment or decrement operation and
returns the value of the increment or decrement operation.
The postfix form returns the current value of all of the expression and
then
performs the increment or decrement operation on that value.
Q :14) What is the result of expression 5.45 + "3,2"?
a.
The double value 8.6
b.
The string ""8.6"
c.
The long value 8.
d.
The String "5.453.2"
Ans: d
Q :15) What are the values of x and y ?
x = 5; y = ++x;
Ans: x = 6; y = 6
Q :16) What are the values of x and z?
x = 5; z = x++;
Ans : x = 6; z = 5
Java
Operators
Interview Questions With Answers
