Practice Explicit Type Conversion (narrowing Conversion) (6.5.2) - Chapter 6: Primitive Values, Wrapper Classes, Types and Casting

Practice: Explicit Type Conversion (Narrowing Conversion)

Lesson 6.5.2Primitive Values, Wrapper Classes, Types and Casting

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10 questions

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6 sample questions

Question 1.
What is narrowing conversion?
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Think about why you might need to convert a double to an int.
Question 2.
What happens when you convert 10.5 to an int?
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What do we call this process?
3Question 3.
What is required for narrowing conversion in Java?
- Implicit casting
- Explicit casting
- Automatic conversion
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Think about what Java requires when changing from a larger type to a smaller type.
4Question 4.
True or False: Narrowing conversion can never lead to data loss.
- True
- False
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Consider what happens when converting a floating-point number to an integer.
Question 5.
Create a program that reads a double value from the user, converts it to an int, and prints both values. Discuss what would happen with different inputs.
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What input would clearly show the effects of truncation?
Question 6.
Write a Java function that attempts to convert various numbers (e.g., double, and long) to int and returns whether it was successful or if there was a notice of potential data loss.
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What checks do you think are necessary to prevent errors during conversion?

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