Practice Primitive Data Types In Java (6.2) - Chapter 6: Primitive Values, Wrapper Classes, Types and Casting

Practice: Primitive Data Types in Java

Lesson 6.2Primitive Values, Wrapper Classes, Types and Casting

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10 questions

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4 cards from this section. Quick, good the night before a test.
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6 sample questions

Question 1.
What is the default value of a boolean in Java?
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Think about the initial state of a boolean variable.
Question 2.
How many primitive data types does Java have?
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Recall what we discussed about the types in class.
3Question 3.
What is the size of a float in Java?
- 8 bits
- 16 bits
- 32 bits
- 64 bits
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Think about the precision needed for decimal values.
4Question 4.
Autoboxing is the process of converting an object to a primitive type.
- True
- False
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What happens during autoboxing?
5Question 5.
Consider the following code snippet. What value will 'result' hold after execution?
Java
float num = 10.5f; int result = (int) num;
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What do you think happens to the decimal part when converting from float to int?
Question 6.
In what scenario would you prefer using wrapper classes over primitive types? Provide a code example.
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Which data structures require objects and can't accept primitive types?

6 more questions in this section. Enroll free to practise them all.