Java Math.max Method and Casting Quiz
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Questions and Answers

What method returns the absolute value of its argument in the Math class?

  • round()
  • pow()
  • max()
  • abs() (correct)
  • Which constant is present in the Math class to represent the mathematical value of pi?

  • PIE
  • π (correct)
  • e
  • pi
  • In Java, what does the Math class conventionally use to name constants?

  • Capital Letters (correct)
  • camelCase
  • LowerCase
  • MixedCase
  • Which method in the Math class returns a double value greater than or equal to 0.0 and less than 1.0?

    <p>random()</p> Signup and view all the answers

    What does the max() method in the Math class return?

    <p>The larger of two int or double arguments</p> Signup and view all the answers

    Which method in the Math class raises Euler's number e to the power of its argument?

    <p>exp()</p> Signup and view all the answers

    What does the method Math.max(j,k) do?

    <p>Returns the larger of two int arguments</p> Signup and view all the answers

    What does explicit casting in Java allow us to do?

    <p>Change the type of a value</p> Signup and view all the answers

    Which syntax represents explicit casting in Java?

    <p>(type) exp</p> Signup and view all the answers

    Which class in Java is a utility class with static methods?

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

    What does the Integer class method max(…) do?

    <p>Returns the larger of two int arguments</p> Signup and view all the answers

    'Java convention is to name constants using capital letters' is associated with which class?

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

    What does the toString(…) method do?

    <p>Returns the String object representing an integer value</p> Signup and view all the answers

    Which method is used to convert a character string to an integer?

    <p>parseInt(…)</p> Signup and view all the answers

    In TotalQuantity.java, what does the line 'String qtyAsString = line.substring(commaAt+1);' do?

    <p>Extracts the quantity value from the input line</p> Signup and view all the answers

    What is the purpose of wrapper classes in Java?

    <p>To convert primitives to objects</p> Signup and view all the answers

    What is the role of the Integer class in Java?

    <p>It provides utility static methods for integers</p> Signup and view all the answers

    Why are wrapper classes called 'wrapper' classes?

    <p>Because they wrap primitive values inside objects</p> Signup and view all the answers

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