Recall & Review
beginner
What is type promotion in Java?
Type promotion is when Java automatically converts a smaller data type to a larger data type to avoid data loss during operations.
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beginner
Which data types are involved in type promotion during arithmetic operations?
Java promotes byte, short, and char to int before performing arithmetic operations.
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beginner
What happens when you add a byte and an int in Java?
The byte is promoted to int, and the result is an int.
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intermediate
Explain type promotion with an example:
byte b = 10; int i = b + 5;
Here, byte b is promoted to int before addition. So, b + 5 is int + int, resulting in an int assigned to i.
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beginner
Does Java promote boolean types during type promotion?
No, boolean types are not promoted because they represent true/false values, not numbers.
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Which type does Java promote byte and short to during arithmetic operations?
✗ Incorrect
Java promotes byte and short to int before arithmetic operations to ensure consistent calculation.
What is the result type of the expression:
byte b = 5; b + 10?✗ Incorrect
The byte is promoted to int, so the result of b + 10 is an int.
Does Java automatically promote boolean values during arithmetic operations?
✗ Incorrect
Boolean values are not promoted because they represent true or false, not numbers.
If you add an int and a long, what is the type of the result?
✗ Incorrect
The int is promoted to long, so the result is long.
Which of these is NOT automatically promoted by Java during arithmetic operations?
✗ Incorrect
Boolean is not promoted because it is not a numeric type.
Explain what type promotion is in Java and why it is important.
Think about how Java handles small numbers when doing math.
You got /4 concepts.
Describe what happens when you add a byte and an int in Java.
Consider how Java treats smaller types in expressions.
You got /4 concepts.