This Java code review checklist is not only useful during code reviews, but also to answer an important Java job interview question, Q. How would you go about evaluating code quality of others’ work? This can judge a candidate’s real experience & … Read more ›...
Q1. What is DevOps? A1. Traditionally the developers & IT operations work in silos where the developers code, build, test & release the software artefacts and the IT operations deploy & monitor the applications. In DevOps a unified team apply the CI/CD practices with automation tools like Jenkins/Bamboo, … Read...
Firstly, the systems need to be designed well. For example, High level & low level system design considerations for read heavy systems vs High level & low level system design considerations for write heavy systems. The performance focus must start from high level design. Q1. … Read more ›...
Unlike J2EE, Java EE 6 consists of annotated classes without any dependencies on the platform. This approach eliminates the need to separate business logic from the infrastructure and makes the majority of J2EE patterns and best practices superfluous. The following J2EE design patterns can be obsolete: — Service Locator (Use...
Functional Programming (i.e. FP) is prevalent in Big Data (i.e. Spark programming, etc) roles. A must know for Big Data Engineers and Analysts. One needs to get used to the transformation from imperative programming to functional programming. You like it or not, … Read more ›...
Concurrency is very important in any modern system, and this is one topic many software engineers struggle to have a good grasp. The complexity in concurrency programming stems from the fact that the threads often need to operate on the common data. Each thread has its own sequence of execution,...
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...
Q1. What is JSON and how does it differ from an XML? A1. JSON (JavaScript Object Notation) is a lightweight, text-based, language-netral like XML, but less verbose than XML data exchange format. JSON is used in Web services to exchange data between client and server. … Read more ›...
Q1. What is the difference between performance and scalability? A1. The performance and scalability are two different things. For example, if you are in the business of transporting people in a van, the performance is all about utilizing more powerful engine to transporting your people quicker to their destination. …...
Java modifiers like final, finally, const, volatile, and transient are very popular with the job interviewers. You will see why because of the possible drill down questions. Q1. What is the difference between ‘final‘ and ‘const‘ modifiers on a variable? … Read more ›...
FAQ Hibernate interview questions & answers are covered below.
Q1. What is an Object-to-Relational Mapping (i.e. ORM) tool?
A1. There are several ways to persist data to a database from your Java applications.
1) Direct JDBC SQL statements for the CRUD (Create,
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Q1. Are memory leaks possible in Java, which has memory management via automatic Garbage Collection? A1. Memory and resource leaks are possible in any robust application. In managed languages such as Java and C#, the developers do not have to worry too much about memory management as the garbage collector...
This is JEE from a 10,000 feet before diving into details of each technology.
Q1. When a company requires Java EE experience, what are they really asking for?
A1. Java EE (i.e. Enterprise Edition) is a collection of specifications for developing and deploying enterprise applications.
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