Practice Explicit Casting (narrowing) (3.2.2) - Chapter 7: Variables and Expressions

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10 questions

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6 sample questions

Question 1.
What is the syntax to cast a double to an int?
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Remember to use parentheses for casting.
Question 2.
Explain what happens when casting from float to int.
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Think about how rounding works.
3Question 3.
What is the term for converting from a larger to a smaller data type in Java?
- Widening
- Narrowing
- Casting
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Think about how it affects the data size.
4Question 4.
True or False: Explicit casting will always preserve the decimal portion of a float.
- True
- False
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Remember what truncation means.
Question 5.
You have a variable double num = 150.75;. Write a Java snippet to safely define an int variable with this value while ensuring you document any potential issues.
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What happens to the decimal part?
Question 6.
Given a float variable f with a value of 500.5, show what happens when you convert it to byte using explicit casting. Discuss the impact on the value.
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Consider how overflow works in data types.

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