Java Foundations Exam 1Z0-811 Practice Test 5

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5 Questions

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

double newFee;

What will be the output of the given Java program?

5000.0

Which data type in Java provides higher precision, especially for decimal values?

double

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

It will lead to loss of precision in the multiplication.

What is the main reason for choosing double over float in Java when dealing with decimal values?

Double variables provide higher precision.

Study Notes

Data Types in Java

  • The variable newFee in the Course class should be of type double to enable the class to compile, considering it's likely to hold decimal values.

Java Program Output

  • The output of the given Java program depends on the actual code and its implementation, which is not provided in the given text.

Precision in Java

  • The double data type in Java provides higher precision, especially for decimal values, compared to the float data type.

Declaring Variables

  • If the variable percentage is declared as double instead of float, it will be able to hold more precise decimal values, which can be beneficial in certain calculations.

Choosing Between double and float

  • The main reason for choosing double over float in Java when dealing with decimal values is to achieve higher precision and accuracy, especially in mathematical calculations or financial applications.

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