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05: ETL architecture interview Q&As

Q1. What is an ETL process? A1. ETL is a architectural style, and it stands for Extract, Transform and Load. Extract does the process of reading data from an input data source like file, database, etc. Transform does the converting of data into a format that could be appropriate for…...

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

Extends Writing low latency applications in Java Q&A. Tip #1: Use a RTSJ (Real Time Specification for Java ) JVM.  IBM, Oracle, and other smaller vendors have implemented this, but it comes at a cost. Oracle’s JavaRT, IBM’s real-time WebSpere, and aicas JamaicaVM to name a few popular ones. In

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Posted in FAQs Java Key Areas, Java Architect Interview Q&A, Judging Experience Interview Q&A, Low Latency, Performance, Scalability
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2. Asynchronous processing in Java real life examples – part-2

Extends: 1. Asynchronous processing in Java real life examples – part-1. Example 3: Trade execution reports are received & processed asynchronously If you are working in an online trading application, you may want the functionality to queue trades and process them when the stock market opens. You also asynchronously receive…...

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1. Asynchronous processing in Java real life examples – part-1

The scenario based questions are very popular with the job interviewers, and some scenario based questions are related to decoupling and asynchronous (aka non-blocking) processing in Java with message queues/topics, database tables where one process inserts data and another process consumes the inserted data, and Future objects in Java multi-threading.…...

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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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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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♦ 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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001B: ♦ Java architect interview Q&As on high level architectures

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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