Java Operators MCQs (Multiple Choice Questions)

By 4 Mins Read

Java, one of the most widely used programming languages, offers a rich set of operators to perform various operations, from basic arithmetic to complex logical evaluations. Understanding these operators and their precedence is crucial for anyone looking to master Java programming. To aid in this journey, we have compiled a meticulously curated set of multiple-choice questions (MCQs) focusing on Java Operators. This collection spans from the foundational arithmetic and relational operators to the more nuanced conditional and bitwise operators. Whether you’re a novice programmer aiming to solidify your Java fundamentals or an experienced developer looking to brush up on the intricacies of Java operators, this guide is tailored to enhance your knowledge and test your skills.

Advertisement

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


Correct Answer: B
The ‘==’ operator is used to compare two values for equality in Java.

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


Correct Answer: B
The ‘%’ operator returns the remainder of the division. In this case, ’10 % 3′ equals 1.

Q3 Which operator is used for string concatenation in Java?


Correct Answer: A
The ‘+’ operator is used for string concatenation in Java.

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


Correct Answer: B
The ‘++’ operator increases the value of a variable by 1.

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


Correct Answer: A
The ternary operator is used as ‘(condition) ? valueIfTrue : valueIfFalse;’ in Java.

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


Correct Answer: A
The expression ‘5 == 5’ evaluates to ‘true’ because both operands are equal.

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


Correct Answer: A
The ‘==’ operator checks if two variables refer to the same object instance in memory.

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


Correct Answer: B
The ‘!’ operator is the logical NOT operator, which inverts the value of a boolean. Thus, ‘!true’ is ‘false’.

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


Correct Answer: C
In Java, the order of precedence is ‘()’, then ‘*’, and ‘+’ has the lowest precedence.

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


Correct Answer: B
The ‘!’ operator is used to invert the value of a boolean variable.

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


Correct Answer: D
The increment operator (++) has the highest precedence in Java.

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


Correct Answer: A
The expression ‘x &= y’ is equivalent to ‘x = x & y’, which sets x to the result of x AND y.

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


Correct Answer: C
The ‘instanceof’ operator checks if an object is an instance of a specific class or interface.

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


Correct Answer: B
The – operator is used to perform negation or change the sign of a value.

Q15 What is the output of ‘1


Correct Answer: D
‘1

Q16 What is the output of the following code snippet?


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


Correct Answer: B
The expression ‘x++ + ++y’ becomes 5 + 11, which equals 16. So, the output of the given Java code will be: 16

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


Correct Answer: B
The bitwise OR operation between two integers x and y is performed using ‘x | y’.

Q18 Which operator is used for type casting in Java?


Correct Answer: C
Type casting in Java is performed using parentheses ‘()’, enclosing the target type.

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


Correct Answer: B
The expression ‘null instanceof Object’ evaluates to ‘false’ because ‘null’ is not an instance of any class.

Q20 What does the expression ‘var a = 20; var b = a


Correct Answer: C
The expression ‘a

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


Correct Answer: D
‘=>’ is not a relational operator in Java. It is used in other programming languages for lambda expressions.

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


Correct Answer: C
The operator ‘?:’ is the ternary conditional operator in Java, used to assign a value based on a condition.

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


Correct Answer: C
The ‘>>>=’ operator performs an unsigned right shift on the operand to the left of the operator by the number of bits specified to the right of the operator and assigns the result to the left operand.

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


Correct Answer: C
The ‘instanceof’ operator is used to check whether an object is an instance of a particular class or interface at runtime.

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


Correct Answer: A
The logical OR operator ‘||’ returns ‘true’ if either of the operands is true. Therefore, ‘true || false’ evaluates to ‘true’.

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


Correct Answer: B
The bitwise XOR operator in Java is ‘^’. It returns 1 for each position where the corresponding bits of two operands are different.

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


Correct Answer: B
The ‘|’ operator performs a bitwise OR operation. For ‘4 | 3’ (i.e., 100 OR 011), the result is 111 in binary, which is 7 in decimal.

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


Correct Answer: C
The ‘>>>=’ operator performs an unsigned right shift on the operand to the left of the operator by the number of bits specified to the right of the operator and assigns the result to the left operand.

Navigating through the realm of Java operators is a fundamental step towards mastering Java programming. The provided MCQs offer a panoramic view of Java’s operator capabilities, from manipulating numbers and strings to making complex decisions based on various conditions. Engaging with these questions not only reinforces theoretical concepts but also sharpens practical problem-solving skills. As you progress, remember that the understanding of operators extends beyond their individual functionality; it’s about recognizing their role in the broader context of Java programming paradigms. We encourage learners to delve deeper into each topic, experiment with code examples, and continuously challenge their understanding. This exploration is not just about passing a test; it’s about laying a solid foundation for your Java programming journey.

Share.

Related Posts

Leave A Reply