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Backend
Java
Curated Java interview questions with detailed answers.
30
questions
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Junior
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12
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8
Java questions
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›
What is Java and what is "write once, run anywhere"?
Junior
#Language
#Java
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›
What is the difference between JVM, JRE and JDK?
Junior
#Platform
#Java
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›
What are primitive types vs reference types in Java?
Junior
#Language
#Java
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›
What are the four pillars of OOP?
Junior
#Oop
#Java
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›
How do classes, objects and constructors work?
Junior
#Oop
#Java
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›
What are Java's access modifiers?
Junior
#Language
#Java
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›
Why are Java Strings immutable, and what is StringBuilder for?
Junior
#Language
#Java
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›
How do arrays work in Java?
Junior
#Data Structures
#Java
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›
What control-flow constructs does Java provide?
Junior
#Language
#Java
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›
What do the static and final keywords mean?
Junior
#Language
#Java
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