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10 Core Java Best Practices with an industry strength code sample

Best Practices is one of the key areas, and often you can impress your interviewers, peers, and code reviewers by applying the best practices to your code. If you are an interviewer, you can show a piece of code that is badly written, and ask for the recommendations as to...



5 Java unit testing interview Questions and Answers

Q1 Why use mock objects in unit testing? A1 Unit testing is widely accepted as a “best practice” for software development. When you write an object, you must also provide an automated test class containing methods by calling its various public methods with various parameters and making sure that the...



9 Java Data structures best practices

#1: Choose the right type of Java data structure based on usage patterns

like fixed size or required to grow, duplicates allowed or not, ordering is required to be maintained or not, traversal is forward only or bi-directional, inserts at the end only or any arbitrary position,

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Can you list 10 JEE best practices from your experience?

Core Java best practices and JEE best practices can reveal a lot about your experience as a Java developer.

Q1. Can you list 10 JEE best practices from your experience?
A1.

#1: Using datasources with JNDI lookups

DataSources make the code more portable than using the DriverManagers.

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How will you go about improving on the following Java code?

Q1. How will you go about improving on the following code snippet that calculates the new balance based on the current balance, total debits, and total credits? Note: All amounts need to be positive values. A1. Firstly, a good thing about the above code is that it uses the BigDecimal...



Top 5 Core Java Exceptions and best practices

#1: ConcurrentModificationException Getting a ConcurrentModificationException when trying to modify (i.e. adding or removing an item) a collection while iterating. The following code throws a ConcurrentModificationException. To avoid ConcurrentModificationException in a single-threaded environment, you can remove the object that you are working on with the iterator. … Read more ›...



Java Interview FAQs

800+ Java Interview Q&As

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