Java Programming Operators
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Java Programming Operators

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Questions and Answers

What does the expression 'var1 >= var2' evaluate to when var1 is 30 and var2 is 20?

  • true (correct)
  • false
  • error
  • undefined

    • What is the output of 'var3 >= var1' when var3 is 5 and var1 is 30?

  • true
  • 30
  • 5
  • false (correct)

    • In the context of relational operators, what does '>= ' signify?

  • less than or equal to
  • not equal to
  • only greater than
  • greater than or equal to (correct)

    • If var1 is 20, var2 is 20, and var3 is 10, what is the output of 'var2 >= var3'?

    <p>true</p> Signup and view all the answers

    What will be the result of evaluating 'var3 > var1' when var3 is 10 and var1 is 20?

    <p>false</p> Signup and view all the answers

    What will be the output of the statement 'num1 *= num2' given num1 = 10 and num2 = 20?

    <p>200</p> Signup and view all the answers

    What does the expression 'var1 == var2' evaluate to if var1 = 5 and var2 = 10?

    <p>false</p> Signup and view all the answers

    Which relational operator should be used to check if one number is greater than another?

    <blockquote> </blockquote> Signup and view all the answers

    What will be the result of 'var1 == var3' if both var1 and var3 are assigned the value 5?

    <p>true</p> Signup and view all the answers

    If num1 is modified to 10 and num2 is set to 20, what equation does 'num1 *= num2' represent?

    <p>num1 = num1 * num2</p> Signup and view all the answers

    What is the primary function of the Addition operator in Java?

    <p>To add two operands</p> Signup and view all the answers

    Which of the following operators is used to perform subtraction in Java?

    <p>Subtraction operator (-)</p> Signup and view all the answers

    In Java, what does the multiplication operator (*) do?

    <p>Multiplies two numbers together</p> Signup and view all the answers

    Which of the following is NOT a category of operators in Java?

    <p>Increment Operators</p> Signup and view all the answers

    What will be the output of the following code: 'num1 = 10; num2 = 20; sum = num1 + num2;'?

    <p>30</p> Signup and view all the answers

    The class 'Addition' provided in the example demonstrates the use of which operator?

    <p>Arithmetic Operator</p> Signup and view all the answers

    Which operator would you use to compare two values for equality in Java?

    <p>Relational operator (==)</p> Signup and view all the answers

    What type of operator is the Subtraction operator classified as?

    <p>Binary Operator</p> Signup and view all the answers

    What is the output of the multiplication operation in the provided code?

    <p>num1 = 20 num2 = 10 Multiplication = 200</p> Signup and view all the answers

    What will happen if the second operand in the division operation is 0?

    <p>It will throw an ArithmeticException.</p> Signup and view all the answers

    In the context of the modulus operation, what does the statement 'mod = num1 % num2' return when num1 is 5 and num2 is 2?

    <p>1</p> Signup and view all the answers

    Which of the following best describes the assignment operator '=' in Java?

    <p>It assigns the value on the right to the variable on the left.</p> Signup and view all the answers

    What is the expected result of the division operation with num1 as 20 and num2 as 10?

    <p>2</p> Signup and view all the answers

    What is the purpose of the modulus operator (%) in Java?

    <p>To return the remainder of a division operation.</p> Signup and view all the answers

    Given the assignment statement 'int x = 10;', what does this indicate?

    <p>x is assigned the value of 10.</p> Signup and view all the answers

    In the multiplication example, what variable holds the result of the operation?

    <p>mult</p> Signup and view all the answers

    What will be the output of the following code? System.out.println('num1 = ' + num1); num1 = 10, num1 += 5;

    <p>num1 = 15</p> Signup and view all the answers

    What does the '-=' operator do in Java?

    <p>It subtracts the value of the right operand from the left.</p> Signup and view all the answers

    What will be printed after executing num1 -= num2 where num1 is initialized to 10 and num2 to 20?

    <p>num1 = -10</p> Signup and view all the answers

    What is the final value of num1 after executing the following: int num1 = 2; num1 *= 3;

    <p>6</p> Signup and view all the answers

    Given the code snippet, what will the output be? System.out.println('name is assigned: ' + name); where name = 'CJCS';

    <p>name is assigned: CJCS</p> Signup and view all the answers

    If num1 and num2 are both initialized to 10 and 20 respectively, what will be the value of num1 after executing num1 += num2;

    <p>30</p> Signup and view all the answers

    What does the output show after executing System.out.println('num2 = ' + num2); if num2 was initialized to 20?

    <p>num2 = 20</p> Signup and view all the answers

    Which of the following statements about the '+=' operator is correct?

    <p>It modifies the left operand in place.</p> Signup and view all the answers

    Study Notes

    Operators in Java

    • Operators are fundamental building blocks of a programming language.
    • They facilitate calculations, logical evaluations, and various other operations.
    • Java provides a wide range of operators categorized based on their functions.

    Arithmetic Operators

    • Addition (+): Adds two operands.
    • Subtraction (-): Subtracts the second operand from the first.
    • Multiplication (*): Multiplies two operands.
    • Division (/): Divides the first operand (dividend) by the second (divisor), producing the quotient.
    • Modulus (%): Returns the remainder when the first operand is divided by the second.

    Assignment Operators

    • Assignment (=): Assigns the value on the right to the variable on the left.
    • Compound Assignment: Combines an arithmetic operator with the assignment operator.
      • += (addition assignment): Adds the right operand to the left and assigns the result to the left operand.
      • -= (subtraction assignment): Subtracts the right operand from the left and assigns the result to the left operand.
      • *= (multiplication assignment): Multiplies the left operand by the right operand and assigns the result to the left operand.
      • /= (division assignment): Divides the left operand by the right operand and assigns the result to the left operand.
      • %= (modulo assignment): Calculates the remainder of the division of the left operand by the right operand and assigns the result to the left operand.

    Relational Operators

    • Equal to (==): Checks if two operands are equal. Returns true if they are, false otherwise.
    • Greater than (>): Checks if the left operand is greater than the right operand. Returns true if it is, false otherwise.
    • Less than (<): Checks if the left operand is less than the right operand. Returns true if it is, false otherwise.
    • Greater than or equal to (>=): Checks if the left operand is greater than or equal to the right operand. Returns true if it is, false otherwise.
    • Less than or equal to (<=): Checks if the left operand is less than or equal to the right operand. Returns true if it is, false otherwise.

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    CS 102: Programming1 Lecture 3 Fall 2024 PDF

    Description

    This quiz explores the different types of operators in Java, including arithmetic and assignment operators. Test your knowledge on how these operators function and their applications in programming. Ideal for learners covering introductory Java concepts.

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