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♥ How to become a Java application architect?

In industry specific forums, I often see questions like “what certification do I need to do to become an architect?”.  The simple answer is that you don’t need a certification to become an architect. It may help, but there is a lot more to it to become an architect. You

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Posted in Java Architect Q&As, True value of Certification

♦ 10 ERD (Entity-Relationship Diagrams) Interview Questions and Answers

Q1. What is an ERD? A1. ERD or Entity-Relationship Diagram, is a chart that visually represents the relationship between database entities. ERDs model an organization’s data storage requirements with three main components: entities, attributes, and relationships. As UML is for charting the relationships and interactions among Java entities like classes…...

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♥ Top 11 slacknesses or mistakes that can come back and bite you as an experienced Java developer

Production issues seek the attention of middle and top level management. Here are a few things that you must pay attention as a software developer or architect to prevent any future embarrassments. You can use this as a check list. #1:  Not externalizing configuration values in .properties or XML files.

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Posted in Java Architect Q&As, QoS
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♥ What are the 16 technical key areas of Java programming to fast-track your career?

What are the 16 technical key areas? If you want to become a Java Application Architect, then you must have good handle on these 16 technical key areas. Not only the architects, but also seasoned Java developers must have a good understanding & hands-on experience in these key areas to

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Posted in 13 Technical Key Areas Q&As, Java Architect Q&As
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♥♦ 01: 30+ Writing low latency applications in Java interview Q&As

Have you seen job advertisements requiring Java candidates to work in real-time, low latency, and high throughput systems? Wondering what questions you will be asked? You will be quizzed on the low latency application you had recently worked on especially the outcomes in terms of the latencies, response times, and

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Posted in FAQs Java Key Areas, Judging Experience Q&As, Low Latency, Low latency & Asynchronous, Performance, Scalability

♦ 12 UML interview Questions & Answers

Q1. What are the different types of UML diagrams? A1. Use case diagrams, Class diagrams, Package diagrams, Object diagrams, Sequence diagrams, Collaboration diagrams, and State chart diagrams. Q2. What is a use case diagram, and when will you use it? A2. Depicts the typical interaction between external users (i.e. actors)…...

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001A: ♥♦ 7+ Java Interview Q&As on high level architectures & integration styles

One of the very frequently asked open-ended interview questions is – Can you describe the high-level architecture of the recent application you had worked on from a 100 feet? You will be asked to 1) draw a diagram on a white board and 2) follow up questions based on your

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Posted in FAQs Java Architectural Patterns, Java Design & Architecture FAQs
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001B: ♦ Q&As on high level Java architectural patterns

Continuation of Java architecture interview Q&A with integration styles & architecture diagrams – part 1 Q3. Can you discuss some of the high level architectures you are experienced with? A3. Be prepared for a white board session on architectures, especially the bird’s eye view of the last application you had…...

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01: ♥ Q1 – Q6 Hadoop based data hub architecture & basics interview Q&As

70+ FAQ Hadoop interview questions answered with lots of diagrams and tutorials to work in the sought-after bigdata space. 70+ Scala interview questions and answers are also covered as Scala is popular in bigdata. Q1. What is Hadoop? A1. Hadoop is an open-source software framework for storing large amounts of

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Posted in Hadoop, Spark & BigData Q&As, Java Design & Architecture FAQs

01: ♥♦ Q01 – Q06 Java Web Services Interview questions & answers

As an enterprise Java developer, you will be spending more time integrating systems via web services & messaging. Java Web Services interview questions are very popular. Q1. What are the different styles of Web Services used for application integration? and What are the differences between both approaches? A1. SOAP WS

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Posted in FAQs Free, FAQs Java Web Services, Java Design & Architecture FAQs, WebService
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01: ♦ Q07 – Q12 Java Micro & Web services Interview Q&As

Extends Java Web Services Basics Interview Q&As – Q17 – Q06. Q7. What is a microservice architecture (aka MSA)? A7. Martin Fowler defines Microservices as a subset of Service Oriented Architecture (SOA). In SOA, the services can be of any size. In a microservice, the service performs a single function.…...

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Posted in FAQs Java Web Services, Java Design & Architecture FAQs, member-paid, WebService

01: ♦ Q13 “12 Rules” for REST API design & development

These are more like rules to develop RESTFul web services as opposed to being the best practices. REST is an architectural style without any contracts or specifications. So, it is imperative to apply the following rules for better REST API design. #1. Write stateless RESTFul services This means each request…...

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Posted in API Design, Best Practice, Design Concepts, FAQs Java Web Services, Java Architect Q&As, member-paid, WebService

02: ♦ 13 Tips to write low latency applications in Java

Extends Writing low latency applications in Java interview Q&As. If the job description says “low latency” application, then be prepared. Even if “low latency” experience is not a requirement, all employers like candidates who can not only build systems that perform well, but also can stress test (e.g. JMeter), profile…...

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Posted in FAQs Java Key Areas, Judging Experience Q&As, Low Latency, Low latency & Asynchronous, member-paid, Performance, Scalability
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03: ♦ What should be a typical Java EE architecture?

This question is a very popular white board session question for both Java architects and experienced JEE Developers. You need to draw on your experience to tackle this question as there are no right or wrong answers. These high level diagrams and summary will help you refresh your memory. Q.…...

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Posted in Java Design & Architecture FAQs, member-paid

04: ♦ How to go about designing a medium size JEE application?

A very popular open-ended question to judge your Java/JEE experience. Q. How would you go about designing a medium sized JEE application? A. Don’t start with 3-tier architecture, logical layers, Spring/Hibernate framework etc. The phases of designing any systems are: Requirements Gathering => Baseline Architecture => Design Alternatives & impact…...

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Posted in FAQs Java Architectural Patterns, Java Design & Architecture FAQs, member-paid
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