Top 50 core Java interview questions covering Java core concepts with diagrams, code, examples, and scenarios. If you don’t get these Java interview questions right, you will not be getting an offer.
Q1. What is the difference between “==” and “equals(…)” in comparing Java String objects?
A1. When you use “==” (i.e.…
The focus is on Java OOP interview questions and answers. Q11. What is the difference between constructors and other regular methods? A11. Constructors must have the same name as the…
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Focus is on Java classes, interfaces and generics the interview questions and answers style. Java classes and interfaces are the building blocks. Q24. What happens when a parent and a…
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As a Java developer, you may not need to know how the JVM works, but the most important topic that you must know is Java Garbage Collection. How the Garbage…
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Q43. What can you tell about the performance of a HashMap compared to a TreeMap? Which one would you prefer? A43. A balanced tree does have O (log n) performance….
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Q1. What is the difference between Docker & Kubernetes? A1. Docker & Kubernetes can function without each other, and also both can compliment each other. Docker enables us to run,…
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Q1. What is the difference between snapshot versions and release versions? A1. The term “SNAPSHOT” means the build is a snapshot of your code at a given time, which means…
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Q1. HTTP is a stateless protocol, so how do you maintain state? How do you store user data between requests?
A1. This is a commonly asked interview question. The “http protocol is a stateless request/response based protocol”. You can retain the state information between different page requests as follows:
HTTP Session.…
Q1. How does Git differ from SVN? A1. #1. Git is a distributed source control system meaning that there will be multiple client repositories. SVN is one repository with lots…
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Q1 How do you remove the Control-M characters from a file? A1 Using the sed command that replaces Control-M with nothing
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sed 's/^M//g' ReadWriteFile.sh > ReadWriteFileNew.sh |
Note: The ^M is typed on the command…
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