Tech Key Areas (16+ ) FAQs Archives | Page 5 of 16 | 800+ Java & Big Data Interview Q&As

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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...

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10 DevSecOps interview Q&As

Q1. What is DevSecOps or DevOpsSec or rugged DevOps? A1. DevSecOps is the philosophy of integrating security practices within the DevOps process. DevSecOps is an evolution of DevOps. Q What is Rugged DevOps? A Rugged DevOps as a technique was borne out of the views expressed in Josh Corman’s RuggedSoftware....

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10 Encryption and Decryption interview Q&As

Q1. What do you understand by the terms encryption and decryption? A1. Encryption is the process of converting clear data (e.g. database password, credit card number, etc) to incomprehensible cyberyext like “š£”Œz_fÓe©ˆ»[” by applying mathematical transformations. These transformations are known as encryption algorithms and require an encryption key. … Read...

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10 ERD (Entity-Relationship Diagrams) Interview Q&As

Q01. Can you describe a business domain of a Telecom company offering multiple services to its customers? A01. A Telecom company will have entities such as Customer, Account, Subscriptions & Products representing a business domain. 1) Each customer entity has a name, … Read more ›...

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10: 8 Java Maps & Caching Data in Java Interview Q&As

Q1. What is the purpose of a Map interface in Java collection API? A1. A map is a set of associations between pairs of objects. One is known as a “key” and the other is known as a “value”. It is used very frequently in programming in case where for...

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10+ Domain Driven Design (i.e. DDD) Interview Q&As

Q1. What is Domain Driven Design (i.e. DDD)? What is DDD oriented microservice? A1. Domain-driven design advocates modelling based on the reality of business as relevant to your use cases. In the context of building applications, DDD talks about problems as domains. If you are building a shopping cart application,...

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10+ Key Java Microservices Interview Questions & Answers

Java microservices interview questions and answers covering microservices patterns, best practices, Springboot and Spring cloud . Q1. How will you go about choosing REST vs Messaging for Microservices? A1. Microservices can be invoked both synchronously and asynchronously. Microservices must be organized around business functionalities like Customers, … Read more ›...

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11 “In your Java experience” interview questions & answers

Q1. In your Java experience, what are some of the common dilemmas you face when writing unit tests? A1. Whether to fix the code or the test. When you write unit tests, sometimes you feel compelled to change your code just to facilitate the test. … Read more ›...

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12 Java design patterns interview Q&As

Q1. Why use design patterns? A1. 1) Capture design experience from the past: E.g. Facade and value object patterns evolved from performance problems experienced due to multiple remote calls. 2) Promote reuse without having to reinvent the wheel: E.g. … Read more ›...

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12 Kerberos interview Q&As

Q1. What is kerberos? A1. Kerberos is a network authentication protocol designed to provide strong authentication for client/server applications by means of secret-key cryptography. Kerberos ensures the highest level of security to network resources. Q2. What are the 3 key components of Kerberos? … Read more ›...

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12: 5 Java synchronize & concurrency mgmt scenarios interview Q&As

This extends Q1. Can you give some scenarios where you had used multi-threading in Java applications? Q2. Can you give some scenarios where you used the synchronized keyword in Java? A2. Firstly, you need to assume that your code is always going to be accessed by multiple threads. … Read...

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14: Singleton design pattern in Java & 5 key follow up Interview Q&As

When you are asked in job interviews to explain a design pattern that you had used, many pick “singleton” as it is easy to explain. But, “singleton” design pattern does have lots of nuances that can lead to further drill down questions mentioned in this post. This post also explains...

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15 Database design interview Q&As

Q1. What is normalization? When to denormalize? A1. Normalization is a design technique that is widely used as a guide in designing relational databases. Normalization is essentially a two step process that puts data into tabular form by removing repeating groups and then removes duplicated data from the relational tables....

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