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I applied via Referral and was interviewed before Nov 2021. There were 4 interview rounds.
First round is a basic DS-Algo Round. It was a pen & paper interview. 2 interviewers asked me to write code for some problems such as:
1. You have an unsorted array of 0s and 1s, find the first 1. Different approaches for it.
2. What is setTimeOut in Node.JS?
3. How can you use 2 stacks as an array.
4. You have 2 sorted arrays. Merge them into a single array.
OS processes are instances of a program that are being executed by the operating system.
Processes are managed by the operating system's scheduler.
Each process has its own memory space and system resources.
Processes can communicate with each other through inter-process communication (IPC).
Examples of processes include web browsers, media players, and text editors.
Threads are lightweight processes that enable multitasking within a single process.
Threads allow multiple tasks to be executed concurrently within a single process.
They share the same memory space and resources of the parent process.
Threads can improve performance by utilizing available CPU resources more efficiently.
Examples include web servers handling multiple requests simultaneously and video games rendering graphi
Node.js is a powerful and efficient server-side JavaScript runtime environment.
Node.js is fast and scalable, making it ideal for building real-time applications.
It uses an event-driven, non-blocking I/O model, which makes it lightweight and efficient.
Node.js has a large and active community, with many useful libraries and modules available.
It allows for easy sharing of code between the server and client, using JavaScri...
Python is a general-purpose language while Node.JS is a JavaScript runtime environment.
Python is used for web development, data analysis, artificial intelligence, and scientific computing.
Node.JS is used for building scalable network applications and real-time web applications.
Python is slower than Node.JS in terms of performance.
Python has a larger standard library than Node.JS.
Python is easier to learn and has a simp
SQL is a relational database management system while NoSQL is a non-relational database management system.
SQL databases are table-based while NoSQL databases are document-based, key-value pairs, graph databases, or column-based.
SQL databases are structured while NoSQL databases are unstructured.
SQL databases use SQL (Structured Query Language) for querying and managing data while NoSQL databases use different query lan...
A Reddit-like application for sharing and discussing content
User authentication and authorization
Post creation and voting system
Commenting system
Subreddit creation and management
Search functionality
Real-time updates using websockets
CORS stands for Cross-Origin Resource Sharing. It is a security feature implemented in web browsers to restrict web pages from making requests to a different domain.
CORS is used to prevent malicious websites from accessing sensitive data from other websites.
To handle CORS, the server needs to include specific headers in the response to allow the browser to make requests from a different domain.
The most common header us...
Low level design for authentication
Define authentication requirements
Choose appropriate authentication mechanism
Design authentication flow
Implement secure storage of credentials
Consider multi-factor authentication
Include error handling and logging
An e2e system architecture design for user input to response output
Identify user requirements and define system goals
Choose appropriate technologies and frameworks
Design system components and their interactions
Ensure scalability, reliability, and security
Test and validate the system before deployment
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I applied via Naukri.com and was interviewed in Dec 2020. There were 3 interview rounds.
posted on 16 Apr 2021
Implement merge sort and find kth largest element in an array.
Merge sort is a divide and conquer algorithm that recursively divides the array into two halves, sorts them and then merges them.
Kth largest element can be found using quick select algorithm or by sorting the array and returning the kth element from the end.
Merge sort has a time complexity of O(nlogn) and space complexity of O(n).
Quick select has a time comp...
I applied via Campus Placement and was interviewed in Dec 2020. There was 1 interview round.
Convert given no to corresponding excel no.
Excel no starts from 1 and goes up to 16384
Excel no is calculated using column and row numbers
For example, 1 corresponds to A, 27 corresponds to AA, 28 corresponds to AB, and so on
Find unique characters in a window of k size in a string.
Use a sliding window approach.
Maintain a hash table to keep track of character frequency.
Remove characters from hash table as the window slides.
posted on 16 Apr 2021
I applied via Referral and was interviewed in Oct 2020. There was 1 interview round.
I applied via Naukri.com and was interviewed in Mar 2021. There were 3 interview rounds.
I applied via Campus Placement and was interviewed in May 2021. There was 1 interview round.
posted on 20 Jun 2021
I applied via Campus Placement and was interviewed in May 2021. There was 1 interview round.
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