Java Developer Interview Questions Every Hiring Manager Should Ask

What is JSON and what is it used for?

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Give an example of a poorly designed Java app you’ve seen developed.

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ArrayList, LinkedList, and Vector are all implementations of the List interface. Which of them is most efficient for adding and removing elements from the list?

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How would you connect a Java application to a database?

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Give 3 benefits of working in an agile team environment.

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Why would it be more secure to store sensitive data (like a password, social security number, etc.) in a character array rather than in a String?

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What is the ThreadLocal class? How and why would you use it?

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Compare the sleep() and wait() methods in Java, including when and why you would use one vs. the other.

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How can you catch an exception thrown by another thread in Java?

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Is a finally block executed when an exception is thrown from a try block that does not have a catch block, and if so, when?

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Ready to Level Up your Java Game?

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