Java Foundations Exam 1Z0-811 Practice Test 5

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Questions and Answers

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

float newFee;
int newFee;
long newFee;
double newFee; (correct)

What will be the output of the given Java program?

50.0
50.0f
5000.0f
5000.0 (correct)

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

float
long
int
double (correct)

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

<p>It will lead to loss of precision in the multiplication. (A)</p> Signup and view all the answers

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

<p>Double variables provide higher precision. (A)</p> Signup and view all the answers

Flashcards

Data type for newFee

The double data type should be used for the newFee variable in the Course class to enable compilation in Java.

Java program output

The output of the given Java program is 5000.0.

Higher precision data type

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

double vs float precision

Using double over float in Java, especially with decimal values, does not lead to loss of precision when performing calculations.

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Reason for choosing double

Double variables are preferred over float variables in Java when dealing with decimal values because they provide higher precision, which is important for accurate results.

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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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Test your knowledge of Java foundational concepts with this practice test for the 1Z0-811 exam. Evaluate your skills with 65 questions and get your final score instantly.