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Fundamental concepts of JavaScript discussed in the interview
Data types in JavaScript (string, number, boolean, object, array)
Functions and scope in JavaScript
DOM manipulation and event handling
Asynchronous programming with callbacks, promises, and async/await
Object-oriented programming concepts in JavaScript
Designing WhatsApp involves creating a high-level design for the messaging app, focusing on features like chat, groups, calls, and media sharing.
Implement chat functionality with real-time messaging using sockets
Design group chat feature with ability to add/remove members
Include end-to-end encryption for secure messaging
Develop voice and video calling functionality
Allow media sharing such as photos, videos, and documen
Design a ticket booking system for efficient and user-friendly experience.
Use a database to store information about available tickets, users, and bookings
Implement a user-friendly interface for users to search for and book tickets
Include features like seat selection, payment processing, and booking confirmation
Consider scalability and performance to handle a large number of users and bookings
I applied via Company Website and was interviewed in Feb 2024. There was 1 interview round.
Design dream11. Bonus - how notification will be sent to customer for milestone of a player they have followed at scale.
Two DSA Questions
1. Check whether two strings are anagram or not?
2. Create power function without using Math.pow() library?
Top trending discussions
Developed a web application for online shopping with user authentication and payment gateway integration.
Used React.js for front-end development
Implemented user authentication using JWT tokens
Integrated Stripe API for payment processing
Optimization techniques are methods used to improve the efficiency and performance of software applications.
Use of algorithms like dynamic programming and greedy algorithms
Profiling and performance tuning to identify bottlenecks
Code refactoring to improve readability and maintainability
Utilizing caching and memoization for faster access to data
Parallel processing and multi-threading for improved concurrency
I applied via Referral and was interviewed in Jan 2024. There were 2 interview rounds.
Find k closest elements in an array
Sort the array based on the absolute difference between each element and the target element
Return the first k elements from the sorted array
posted on 13 Aug 2024
I applied via Referral and was interviewed in Oct 2023. There were 2 interview rounds.
Pagination in SQL allows for displaying a subset of query results at a time.
Use LIMIT and OFFSET clauses in SQL queries to implement pagination.
LIMIT specifies the maximum number of rows to return.
OFFSET specifies the number of rows to skip before starting to return rows.
Threads and tasks are both used in multiprocessing, but have different characteristics and use cases.
Threads are lightweight processes within a single process, sharing memory space. They are managed by the operating system.
Tasks are units of work that can be executed asynchronously. They are typically managed by a task scheduler.
Threads are suitable for parallel processing and improving performance, while tasks are use...
ViewBag is used to pass data from controller to view, while TempData is used to pass data between controller actions.
ViewBag is a dynamic property that allows you to pass data from controller to view
TempData is a dictionary object that allows you to pass data between controller actions
ViewBag is not type-safe and requires typecasting, while TempData is type-safe
ViewBag data is lost if redirection occurs, while TempData
Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.
Abstract classes can have constructors, fields, and non-abstract methods.
Interfaces can only have abstract methods and constants.
A class can implement multiple interfaces but can only inherit from one abstract class.
I applied via Approached by Company and was interviewed in Mar 2024. There was 1 interview round.
REST API is a standard way of building web services, while Kafka is a distributed streaming platform for handling real-time data feeds.
REST API is used for building web services that follow the REST architectural style
Kafka is used for handling real-time data feeds and building real-time data pipelines
REST API is synchronous, while Kafka is asynchronous and can handle high throughput and low latency data streams
I applied via Recruitment Consulltant and was interviewed before May 2023. There were 2 interview rounds.
Primary is used to define a primary bean when multiple beans of the same type are present, while Qualifier is used to specify which bean to autowire when multiple beans of the same type are present.
Primary annotation is used to give a higher preference to a bean when multiple beans of the same type are present in the Spring application context.
Qualifier annotation is used to specify which bean to autowire when multiple...
Fault tolerance in Microservices can be achieved through redundancy, graceful degradation, and circuit breakers.
Implementing redundancy by having multiple instances of each microservice running to handle failures.
Using graceful degradation to ensure that the system can still function even if certain microservices are unavailable.
Utilizing circuit breakers to prevent cascading failures by temporarily stopping requests t
Implementing Spring Security involves configuring security settings in the Spring application.
Add Spring Security dependency in pom.xml
Configure security settings in SecurityConfig class
Define user roles and permissions
Use annotations like @EnableWebSecurity and @Secured
OAuth 2 is an authorization framework that allows a third-party application to obtain limited access to an HTTP service.
OAuth 2 is used for delegated access, allowing a user to grant a third-party application access to their resources without sharing their credentials.
It involves the use of access tokens, which are issued by the authorization server after the user authenticates and authorizes the application.
OAuth 2 su...
Java uses automatic memory management through garbage collection to allocate and deallocate memory.
Java uses garbage collection to automatically manage memory by deallocating objects that are no longer needed.
The JVM has a heap where objects are allocated and garbage collection is performed to reclaim memory.
Java provides the 'finalize()' method for objects to perform cleanup before they are garbage collected.
Memory le...
Different types of garbage collection algorithms in software development.
Mark and Sweep: Identifies and removes unreachable objects.
Generational: Divides objects into different generations based on age.
Parallel: Uses multiple threads to perform garbage collection concurrently.
Incremental: Spreads garbage collection work over multiple cycles to reduce pause times.
Executors are a class that provides factory and utility methods for Executor, ExecutorService is an interface that represents an asynchronous execution service.
Executors class provides factory and utility methods for Executor interface
ExecutorService is an interface that represents an asynchronous execution service
ExecutorService extends Executor interface
ExecutorService provides methods to manage termination and produ...
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