10+ Zomato Interview Questions and Answers

SSL set up requires a valid SSL certificate and configuring web server settings.

• Obtain a valid SSL certificate from a trusted Certificate Authority (CA)

• Configure web server settings to enable SSL/TLS protocol

• Ensure that the SSL certificate matches the domain name of the website

• Update website URLs to use HTTPS instead of HTTP

• Regularly renew SSL certificate to maintain security

GTT stands for Global Temporary Table, which is a temporary table used to store data temporarily during a session.

• GTT is a temporary table that is created and used within a session

• Data in GTT is visible only to the session that created it

• GTT is automatically dropped at the end of the session or when the transaction is committed or rolled back

Spring Boot is a framework built on top of Spring, providing a more streamlined development experience.

• Spring Boot provides auto-configuration, reducing the need for manual configuration

• Spring Boot includes an embedded server, making it easier to deploy applications

• Spring Boot provides a simpler project structure and faster development experience

• Spring Boot is opinionated, providing defaults for many configuration options

• Spring Boot is built on top of Spring, providing all th...read more

There are three types of exceptions in Java: checked, unchecked, and errors.

• Checked exceptions are checked at compile-time, e.g. IOException

• Unchecked exceptions are not checked at compile-time, e.g. NullPointerException

• Errors are caused by the environment in which the application is running, e.g. OutOfMemoryError

Performing CRUD on MVC or Asp.net

• Create: Use HTTP POST method to add new data to the database.

• Read: Use HTTP GET method to retrieve data from the database.

• Update: Use HTTP PUT or PATCH method to modify existing data in the database.

• Delete: Use HTTP DELETE method to remove data from the database.

I developed 3 APIs on my previous project.

• Developed 3 APIs for data retrieval, user authentication, and payment processing.

• Used RESTful architecture for API development.

• Integrated APIs with frontend and backend systems for seamless communication.

The project uses a microservices architecture.

• The architecture is based on the principles of microservices.

• Each service is developed and deployed independently.

• The services communicate with each other through APIs.

• The architecture allows for scalability and flexibility.

• Examples of technologies used include Docker, Kubernetes, and AWS.

Multi instance refers to the ability of a system to run multiple instances of an application or service simultaneously.

• Multi instance allows for greater scalability and flexibility in a system.

• It can be used to distribute workload across multiple instances, improving performance and reducing downtime.

• Examples include running multiple instances of a web server or database server.

• Multi instance can also be used for redundancy and failover purposes.

• It is important to properly ma...read more

OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.

• OOPS is based on four main concepts: Encapsulation, Inheritance, Polymorphism, and Abstraction.

• Encapsulation is the process of hiding the implementation details of an object from the outside world.

• Inheritance is the process of creating a new class from an existing class, inheriting all the properties and methods of the parent class.

• Polymorphism is the ability of an...read more

Spring Boot has various annotations for different purposes.

• SpringBootApplication - main class of Spring Boot application

• RestController - marks a class as a RESTful controller

• Autowired - injects dependencies automatically

• RequestMapping - maps HTTP requests to handler methods

• Value - injects values from properties file or environment variables

NodeJs is a runtime environment that allows you to run JavaScript on the server side.

• NodeJs uses an event-driven, non-blocking I/O model which makes it lightweight and efficient.

• It is built on the V8 JavaScript engine from Google Chrome.

• NodeJs allows you to easily build scalable network applications.

• It uses the CommonJS module system for organizing code.

• NodeJs has a large ecosystem of open source libraries available through npm.

Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.

• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() method to handle success and failure.

• Example: const promise = new Promise((resolve, reject) => { ... });

Query optimization is the process of improving the performance of a database query.

• It involves analyzing and modifying the query to reduce the execution time and resource usage.

• Techniques include indexing, rewriting the query, and using query hints.

• Example: Adding an index to a frequently used column can significantly improve query performance.

• Example: Rewriting a complex query to use simpler subqueries can also improve performance.

• Example: Using query hints to force the data...read more

There were 5 nodes worked on the earlier project.

• 5 nodes were involved in the project

• Each node had specific tasks and responsibilities

• Collaboration and communication among nodes were crucial for project success

CICD process involves continuous integration, continuous delivery, and continuous deployment to automate software delivery.

• Continuous Integration (CI) - Developers regularly merge code changes into a shared repository, triggering automated builds and tests.

• Continuous Delivery (CD) - Code changes that pass automated tests are automatically deployed to a staging environment for further testing.

• Continuous Deployment - Code changes that pass all tests are automatically deployed t...read more