Java Foundations Exam 1Z0-811 Practice Test 5
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Java Foundations Exam 1Z0-811 Practice Test 5

Test your knowledge with this practice set for the Java Foundations Exam 1Z0-811. There are 65 questions to answer within a limited time. Get your final score and see how well you performed.

Created by
@HeroicMorganite

Questions and Answers

What data type should be used for the variable newFee to enable the Course class to compile?

double newFee;

What is the value of newFee if the code compiles and runs successfully?

$5000.00

Which data type has a higher precision in Java?

double

What happens if the variable percentage is declared as double instead of float?

<p>There will be no impact on the result.</p> Signup and view all the answers

Which of the following statements about floating-point numbers in Java is true?

<p>-1.0*Double.POSITIVE_INFINITY results in -Infinity.</p> Signup and view all the answers

Study Notes

Data Type for newFee

  • The variable newFee should be declared as a double to enable the Course class to compile.

Value of newFee

  • The value of newFee depends on the calculation and values used in the code, but if the code compiles and runs successfully, it will hold a decimal value.

Precision in Java

  • double data type has a higher precision than float in Java.

Declaring percentage as double

  • If the variable percentage is declared as double instead of float, it will be able to hold more precise decimal values and reduce the risk of precision loss.

Floating-point Numbers in Java

  • In Java, floating-point numbers are represented as binary fractions, which can lead to slight precision errors due to the conversion from decimal to binary.

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