Core Java - Interview Questions and Answers for 'Float' | Search Interview Question

Core Java - Interview Questions and Answers for 'Float' - 4 question(s) found - Order By Rating

Q1. Why calculations in float or Double sometimes gives unpredictable results ?

Ans. Because the way float values are stored its not precise.

For example - 0.1 is actually stored as
0.1000000000000000055511151231257827021181583404541015625

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Q2. What is the difference between float and double?

Ans. Float can represent up to 7 digits accurately after decimal point, where as double can represent up to 15 digits accurately after decimal point.

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Q3. Name few float data type related classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-data-types-float-classes-and.html

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Q4. Which takes more memory - float or Float ?

Core Java

Ans. float is a native data type whereas Float is a class. A Float object will always take more memory than float variable as there are metadata overheads with the objects.

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