Ratna Global Technologies Interview Questions and Answers

Q1. Whats the difference between REST Api and Kafka? when do you choose each
Ans. 
REST API is a standard for building web APIs, while Kafka is a distributed streaming platform. REST is used for synchronous communication, while Kafka is used for asynchronous communication.
• REST API is used for building web APIs that follow the REST architectural style, allowing clients to interact with servers over HTTP. It is typically used for synchronous communication.

• Kafka is a distributed streaming platform that ...read more
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Q2. Different Springboot annotations used
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Springboot annotations are used to simplify the development process by providing metadata to the Spring framework.
• Annotations like @RestController, @RequestMapping, @Autowired, @Component are commonly used in Springboot.

• These annotations help in defining the behavior of the application, mapping endpoints, injecting dependencies, and creating beans.

• For example, @RestController is used to define a controller class, @Requ...read more
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Q3. Different aspects to improved database performance and scaling
Ans. 
Database performance and scaling can be improved by optimizing queries, indexing, caching, partitioning, and using sharding.
• Optimize queries by avoiding unnecessary joins, using proper indexes, and limiting the data returned

• Use indexing to speed up data retrieval by creating indexes on columns frequently used in queries

• Implement caching to store frequently accessed data in memory for faster retrieval

• Partitioning can he...read more
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Q4. Overall workflow of your project, tech stack, why those tech stack have been chosen so
Ans. 
Our project uses a modern tech stack including Java, Spring Boot, Angular, and MySQL for efficient development and scalability.
• Java and Spring Boot chosen for their robustness, scalability, and community support.

• Angular selected for its ability to create dynamic and interactive user interfaces.

• MySQL used for its reliability and performance in handling large amounts of data.
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Q5. GraphQL vs REST advantages and limitations
Ans. 
GraphQL vs REST comparison in terms of advantages and limitations
• GraphQL allows clients to request only the data they need, reducing over-fetching and under-fetching

• REST is simpler to understand and implement for basic CRUD operations

• GraphQL has a strong type system which helps in avoiding errors during development

• REST has better caching mechanisms due to its statelessness

• GraphQL can lead to complex queries and potenti...read more
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Q6. Different HTTP methods in REST Api, can we retrieve data through POST API?
Ans. 
No, POST method is used to create new data, not retrieve existing data in REST API.
• POST method is used to create new data in REST API

• GET method is used to retrieve existing data in REST API

• Other HTTP methods like PUT, PATCH, DELETE have different purposes in REST API
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Q1. Call backs in javascript
Ans. 
Callbacks in JavaScript are functions that are passed as arguments to other functions and are executed at a later time.
• Callbacks are commonly used in asynchronous programming to handle events or responses.

• Callbacks can be anonymous functions or named functions.

• Example: setTimeout(function() { console.log('Hello, world!'); }, 1000);
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Q2. Objects Print inside data in objects
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Coding print inside objects

Q1. SOLID Principles, Design Patterns, SQL, WPF
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Q1. Coding interview
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Q1. Salary negotiation
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Q1. Explain about SDLC & STLC
Ans. 
SDLC is a process followed for software development while STLC is a process followed for software testing.
• SDLC stands for Software Development Life Cycle

• It includes phases like planning, designing, coding, testing, and maintenance

• STLC stands for Software Testing Life Cycle

• It includes phases like test planning, test design, test execution, and test closure

• Both SDLC and STLC are important for delivering quality software
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Q2. What is Java and explain the execution process
Ans. 
Java is a high-level programming language used for developing applications and software.
• Java is an object-oriented language

• It is platform-independent

• Java code is compiled into bytecode

• The bytecode is executed by the Java Virtual Machine (JVM)

• JVM converts bytecode into machine code

• Java programs are executed in a sandbox environment for security

• Java has automatic memory management
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Q1. Explain about Github
Ans. 
Github is a web-based platform for version control and collaboration.
• Github allows developers to store and manage their code repositories online.

• It provides features like version control, issue tracking, and pull requests.

• Github also allows for collaboration between developers through features like forking and merging.

• It supports various programming languages and integrates with many development tools.

• Github is widely ...read more
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Q2. What is selenium and explain it's components
Ans. 
Selenium is a popular open-source automation testing tool used for web applications.
• Selenium has four components: Selenium IDE, Selenium RC, WebDriver, and Selenium Grid.

• Selenium IDE is a record and playback tool used for creating test cases.

• Selenium RC is a deprecated tool that allows executing test scripts in multiple browsers.

• WebDriver is a tool used for automating web applications and supports multiple programming ...read more
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Q1. Explain about yourself
Ans. 
I am a QE Automation Engineer with 5 years of experience in testing and automating software applications.
• I have a strong background in test automation frameworks like Selenium and Appium.

• I am proficient in programming languages like Java and Python.

• I have experience in creating and executing test plans, test cases, and test scripts.

• I have worked on both web and mobile application testing.

• I am familiar with Agile method...read more
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Q2. Why you choose QE filed
Ans. 
I chose the QE field because of my passion for ensuring quality and improving processes.
• I have always been interested in technology and how it can be used to enhance efficiency and effectiveness.

• I enjoy problem-solving and finding ways to optimize systems and workflows.

• I believe that quality is crucial in any industry and I want to contribute to delivering high-quality products and services.

• I am detail-oriented and hav...read more
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