Java interview questions and answers for beginner

[DDarkBC]

Good job 😃 @kenany92 your article is really great, love it. Thanks also for contributing to the community. Together we're going to do great things and achieve big projects. OK, I've some improvments for you:

• [ ] What is Java?: You might want to mention that Java is also widely used for server-side development, Android apps, and much more.
• [ ] Features of Java: Consider breaking down the features into bullet points for easier readability.
• [ ] JDK, JRE, JVM: This section could be clearer if you use a table format.
• [ ] Heap and Stack Illustration: You mentioned an illustration, but there's no illustration provided.
• [ ] Static void main method: You could elaborate a bit more on why the main method is static and why it takes a String[] args parameter.
• [ ] Is empty .java file name a valid source file name?: This question is a bit unclear. Do you mean to ask if an empty Java file (i.e., a file with no content) is a valid source file?
• [ ] Wrapper Classes: You could provide examples of wrapper classes like Integer, Character, etc.
• [ ] Polymorphism: The example code for polymorphism is incorrect. In Java, you don't use implements for class inheritance; you use extends.
• [ ] Compile-Time and Run-Time Polymorphism: The code snippets have a typo; vois should be void.
• [ ] Exception: You could elaborate more on checked and unchecked exceptions.
• [ ] Automatic Garbage Collection: You might want to mention that the garbage collector is part of the Java Virtual Machine (JVM).
• [ ] Possible ways to making object eligible for garbage collection: The sentence "An island of isolation is a group of objects that reference each other but are not referenced by any active object in the application." could be confusing for beginners. Maybe provide a simpler explanation.

Also in a more General perspective :

• [ ] Grammar and Spelling: There are some grammatical errors and typos throughout the article. Consider proofreading the article or using a grammar checker tool (Reverso for example).
• [ ] Code Formatting: Make sure that all code snippets are well-formatted. This will make it easier for the reader to understand the code.
• [ ] Consistency: Maintain consistency in the formatting, especially when you're listing points or explaining concepts.
• [ ] Examples: While you have provided examples in some sections, consider adding more practical examples to further illustrate your points (for next articles it'll be great).

Good Job Again Colleague!

[kenany92]

@DDarkBC did you follow this link to see what the article looks for? https://github.com/kenany92/community/tree/java-interview-questions-and-answers-beginner/java/java-interview-questions-and-answers-beginner

[dassiorleando]

@kenany92, @danielkaiser80, and @DDarkBC Great stuff you are doing together here, I’m sure this content will be REALLY appreciated.

A lot of courage to finalize it ✅

[dassiorleando]

@kenany92 please is that OK, do you need another round of review?

[dassiorleando]

@kenany92 please is it possible to check the items you have done which are pointed out by @DDarkBC in the list on the top?

[DDarkBC]

It's good for me 👌🏾

[dassiorleando]

Me move live with this then, thank you so much for your ALWAYS valuable contributions. 🥇 🚀 💯 👍