Core java - Interview Questions and Answers for 'Span infotech' | Search Interview Question

Core java - Interview Questions and Answers for 'Span infotech' - 2 question(s) found - Order By Newest

Frequently asked these days as there are major changes in Java 8.

Q1. What are new features introduced with Java 8 ?

Ans. Lambda Expressions , Interface Default and Static Methods , Method Reference , Parameters Name , Optional , Streams, Concurrency.

Sample Code for Lambda

Sample Code for interface default

Sample Code for Optional

Sample Code for Streams

Sample Code for java.time

Sample Code for Predicate

Sample Code for Consumer

Sample Code for MapMerge

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Related Questions

Difference between final and effectively final ? Why is effectively final even required ?

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Name few "Optional" classes introduced with Java 8 ?

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Is it ok to use optional everywhere just to get over nullpointerexception ?

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Q2. 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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What is casting?

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