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I applied via LinkedIn and was interviewed in Jul 2024. There was 1 interview round.
Design a system to rate and review products or services.
Allow users to rate products on a scale of 1-5 stars.
Include written reviews for users to provide more detailed feedback.
Implement a system to filter and display reviews based on relevance or helpfulness.
Consider incorporating user profiles and past review history to personalize recommendations.
I applied via LinkedIn and was interviewed in Jul 2024. There was 1 interview round.
I was asked to perform the low-level design of a microservice.
I am a passionate software engineer with experience in developing web applications using various technologies.
Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular
Proficient in backend development with Node.js and databases like MySQL and MongoDB
Familiar with version control systems like Git and project management tools like Jira
Razorpay interview questions for designations
Basic DS Question, Medium level difficulty , followed with some puzzles
Designing an in-memory database involves optimizing data storage and retrieval for fast performance.
Use data structures like hash tables or B-trees for efficient indexing and searching
Implement caching mechanisms to reduce disk I/O and improve read/write speeds
Consider data durability and consistency mechanisms to prevent data loss in case of system failures
I applied via Company Website and was interviewed in Jan 2021. There were 5 interview rounds.
Top trending discussions
I was interviewed in Jun 2017.
Ajax calls allow for asynchronous communication between client and server without reloading the page.
Ajax stands for Asynchronous JavaScript and XML
Uses XMLHttpRequest object to send and receive data
Allows for partial page updates without reloading the entire page
Can handle data in various formats such as JSON, XML, HTML, and plain text
Example: $.ajax({url: 'example.com', success: function(data){console.log(data)}});
REST is lightweight and uses HTTP while SOAP is XML-based and has more features.
REST uses HTTP methods like GET, POST, PUT, DELETE while SOAP uses XML messaging.
REST is stateless while SOAP can maintain state.
REST is faster and easier to use while SOAP is more secure and reliable.
REST is used for web services while SOAP is used for enterprise-level services.
Example of REST: Twitter API. Example of SOAP: Amazon Web Serv
GET and POST are HTTP methods used for sending data to a server.
GET is used to retrieve data from a server
POST is used to submit data to a server
GET requests can be cached and bookmarked
POST requests are not cached and cannot be bookmarked
GET requests have length restrictions
POST requests have no length restrictions
GET requests are less secure than POST requests
Observer pattern is a design pattern in which an object maintains a list of its dependents and notifies them automatically of any state changes.
Also known as publish-subscribe pattern
Used in event-driven systems
Allows loose coupling between objects
Example: A weather station broadcasts weather updates to multiple displays
Example: A stock market ticker notifies multiple investors of stock price changes
Singleton is a design pattern that restricts the instantiation of a class to a single object.
Singleton ensures that only one instance of a class exists in the entire application.
It provides a global point of access to the instance.
Commonly used in scenarios where a single instance needs to coordinate actions across the system.
Example: Database connection manager, logger, configuration manager.
Immutable in Java refers to objects whose state cannot be changed after creation.
String, Integer, and other wrapper classes are immutable in Java.
Immutable objects are thread-safe and can be shared without synchronization.
To create an immutable class, make all fields final and private, and don't provide setters.
Examples of immutable classes in Java include LocalDate, LocalTime, and LocalDateTime.
Creating immutable in Java
Use final keyword to make variables immutable
Use private constructor to prevent object modification
Use defensive copying to prevent modification of mutable objects
Use enum to create immutable objects
Use String class to create immutable strings
Dependency injection is a design pattern that allows objects to receive dependencies rather than creating them internally.
It helps to decouple the code and makes it more testable and maintainable.
It allows for easier swapping of dependencies without changing the code.
There are three types of dependency injection: constructor injection, setter injection, and interface injection.
Example: Instead of creating a database co...
CORS stands for Cross-Origin Resource Sharing. It is a security feature implemented in web browsers to restrict access to resources from different origins.
CORS allows web servers to specify which origins are allowed to access its resources
It is implemented using HTTP headers
CORS prevents malicious websites from accessing sensitive data from other websites
Examples of resources that may be restricted by CORS include cook
CORS can be overcome by configuring the server to allow cross-origin requests.
Configure the server to include the Access-Control-Allow-Origin header
Use JSONP (JSON with Padding) to bypass CORS restrictions
Use a proxy server to make the request on behalf of the client
Use a browser extension to disable CORS restrictions during development
Use a server-side proxy to forward requests to the target server
I applied via Campus Placement
I applied via Referral
My biggest achievement till date is successfully leading a team to develop and launch a new software product ahead of schedule.
Led a team of developers to create a new software product
Completed the project ahead of schedule
Received positive feedback from clients and stakeholders
I would address conflicts directly and respectfully, seeking to understand the root cause and find a mutually beneficial solution.
Listen actively to understand the other person's perspective
Communicate clearly and respectfully
Identify the root cause of the conflict
Brainstorm potential solutions together
Be willing to compromise and find a mutually beneficial solution
Success is achieving personal goals, feeling fulfilled, and making a positive impact.
Success is subjective and can vary from person to person.
It involves setting and achieving goals, both short-term and long-term.
Feeling fulfilled and content with one's accomplishments is a key aspect of success.
Making a positive impact on others or the world can also be a measure of success.
Success is not just about material wealth or...
Dijkstra's algorithm finds the shortest path between nodes in a graph.
Create a graph with nodes and edges
Assign a tentative distance to each node
Set the initial node as current and mark it visited
For each neighbor of the current node, calculate the tentative distance
If the tentative distance is less than the current distance, update the distance
Mark the current node as visited and select the unvisited node with the sma...
A program to reverse a singly linked list
Create a new empty linked list
Traverse the original linked list and insert each node at the beginning of the new list
Return the new list
Methods to find nth largest element in an unsorted linked list
Traverse the linked list and store elements in an array, sort the array and return the nth largest element
Use quickselect algorithm to find the nth largest element in O(n) time complexity
Implement a max heap and extract the nth largest element
Divide the linked list into smaller sublists and recursively find the nth largest element
Use merge sort to sort the l
A prime number is a number that is divisible only by 1 and itself.
A prime number has exactly two factors: 1 and itself.
Prime numbers cannot be divided evenly by any other number.
Examples of prime numbers include 2, 3, 5, 7, 11, 13, 17, etc.
Test cases for a bank transaction
Transaction amount within account balance limit
Transaction amount exceeds account balance limit
Transaction to a valid account number
Transaction to an invalid account number
Transaction with correct transaction code
Transaction with incorrect transaction code
Transaction during bank working hours
Transaction outside bank working hours
Design classes for educational institutions in a city
Identify the main entities: schools, students, teachers, courses
Create a School class with attributes like name, address, and a list of students and teachers
Create a Student class with attributes like name, age, and a list of courses
Create a Teacher class with attributes like name, specialization, and a list of courses
Create a Course class with attributes like name, ...
I applied via Campus Placement and was interviewed in Dec 2016. There were 5 interview rounds.
Paypal is a leading online payment platform with a strong reputation and global presence.
Paypal is a well-established and trusted online payment platform used by millions of users worldwide.
It offers secure and convenient payment options for both individuals and businesses.
Paypal has a strong focus on innovation and technology, making it an exciting place to work for software engineers.
Working at Paypal provides opport...
Paypal is a digital payment platform that allows individuals and businesses to make online transactions.
Paypal provides a secure way to send and receive money online.
It allows users to link their bank accounts, credit cards, or debit cards to their Paypal account.
Users can make payments to merchants or individuals using their Paypal balance or linked payment methods.
Paypal offers buyer and seller protection, dispute re...
In 5 years, I see myself as a senior software engineer leading a team of developers on innovative projects.
Continuing to enhance my technical skills and knowledge through ongoing learning and certifications
Taking on more leadership responsibilities and mentoring junior team members
Contributing to the development of cutting-edge software solutions
Building strong relationships with colleagues and stakeholders to drive pr
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