Java Operators MCQs (Multiple Choice Questions)

Q1 Which operator is used to compare two values for equality in Java?

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

Q2 What is the output of the expression ’10 % 3′?

A 3B 1C 0D 10

Q3 Which operator is used for string concatenation in Java?

A +B &C &&D .

Q4 What does the ‘++’ operator do to a variable?

A Decreases its value by 1B Increases its value by 1C Doubles its valueD Squares its value

Q5 Which of the following is the correct way to use the ternary operator?

A var result = (condition) ? valueIfTrue : valueIfFalse;B var result = (condition, valueIfTrue, valueIfFalse);C var result = ?(condition) valueIfTrue : valueIfFalse;D var result = if(condition) ? valueIfTrue : valueIfFalse;

Q6 What is the result of the expression ‘5 == 5’?

A trueB falseC 1D 0

Q7 Which operator checks if two variables refer to the same object instance?

A ==B ===C equals()D instanceof

Q8 What is the result of the expression ‘!true’?

A trueB falseC 1D 0

Q9 What is the precedence order of the operators: *, +, and ()?

A +, *, ()B *, +, ()C (), *, +D (), +, *

Q10 Which operator is used to invert the value of a boolean variable?

A ~B !C –D ^

Q11 Which of the following operators has the highest precedence in Java?

A &&B +C /D ++

Q12 What does the expression ‘x &= y’ do?

A Sets x to the result of x AND yB Sets x to the result of x OR yC Sets x to the result of x XOR yD Compares x and y for equality

Q13 Which of the following is true about the ‘instanceof’ operator?

A It is used to compare numerical valuesB It is used for arithmetic operationsC It checks if an object is an instance of a specific class or interfaceD It concatenates strings

Q14 Which of the following is a unary operator in Java?

A +B –C /D *

Q15 What is the output of ‘1 << 2'?

A 1B 2C 3D 4

Q16 What is the output of the following code snippet?

int x = 5;  
int y = 10;  
int z = x++ + ++y;  
System.out.println(z);

A 15B 16C 17D 18

Q17 How do you perform a bitwise OR operation between two integers x and y?

A x || yB x | yC x OR yD x + y

Q18 Which operator is used for type casting in Java?

A castB instanceofC ()D typeof

Q19 What is the result of the expression ‘null instanceof Object’?

A trueB falseC NullPointerExceptionD Compilation error

Q20 What does the expression ‘var a = 20; var b = a << 2;' set 'b' to?

A 5B 40C 80D 100

Q21 Which of the following is NOT a relational operator in Java?

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

Q22 What is the use of the operator ‘?:’ in Java?

A To perform logical operationsB To perform exponential calculationsC To assign a value based on a conditionD To concatenate strings

Q23 What does the ‘>>>=’ assignment operator do?

A Performs a right shift and assigns the resultB Performs a left shift and assigns the resultC Performs an unsigned right shift and assigns the resultD Performs an unsigned left shift and assigns the result

Q24 Which operator is used to determine if an object is of a certain type (class) at runtime?

A ==B !=C instanceofD getClass()

Q25 What does the expression ‘true || false’ evaluate to in Java?

A trueB falseC 0D 1

Q26 Which of the following is the correct use of the bitwise XOR operator in Java?

A int result = x ~ y;B int result = x ^ y;C int result = x | y;D int result = x && y;

Q27 What is the result of the following operation: ‘4 | 3’?

A 0B 7C 1D 12

Q28 In Java, what does the ‘>>>=’ operator do?

A Performs a right arithmetic shift and assigns the resultB Performs a left arithmetic shift and assigns the resultC Performs an unsigned right shift and assigns the resultD Performs an unsigned left shift and assigns the result