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I applied via LinkedIn and was interviewed before Feb 2023. There were 2 interview rounds.
Designing a chess game involves creating a board with 64 squares, defining the movement rules for each piece, implementing game logic, and designing a user interface.
Create a 8x8 board with alternating colors for squares
Define movement rules for each type of chess piece (pawn, rook, knight, bishop, queen, king)
Implement game logic for capturing pieces, checkmate, stalemate
Design a user interface for players to interact
I applied via Campus Placement and was interviewed before Sep 2022. There were 5 interview rounds.
2 medium level questions
Implement a stack data structure using an array of strings.
Use an array to store the strings in the stack.
Implement push() and pop() functions to add and remove elements from the stack.
Keep track of the top of the stack using a variable.
I applied via Job Fair and was interviewed before Oct 2021. There were 3 interview rounds.
Sar mujhe job ki bahut jyada jarurat hai
PubMatic interview questions for popular designations
I applied via Recruitment Consulltant and was interviewed before Oct 2022. There were 4 interview rounds.
Questions around DSA were asked
Questions about ML fundamentals were asked along with last experience
Get interview-ready with Top PubMatic Interview Questions
I applied via LinkedIn and was interviewed in May 2021. There was 1 interview round.
Multiprocessing is the use of multiple processors to execute multiple tasks simultaneously. Multithreading is the use of multiple threads within a single process to execute multiple tasks simultaneously.
Multiprocessing involves the use of multiple processors or cores to execute multiple tasks simultaneously.
Multithreading involves the use of multiple threads within a single process to execute multiple tasks simultaneou...
Simulating one user profile to another can be done through user impersonation.
User impersonation can be achieved through various tools and techniques.
One way is to use a proxy server to intercept and modify the user's requests and responses.
Another way is to use a browser extension or plugin that allows you to switch between user profiles.
You can also use a testing tool like Selenium to automate the process of switchin...
bashrc and .profile are configuration files for the Bash shell in Linux/Unix systems.
bashrc is executed for every new interactive shell session
.profile is executed only once during login
They contain environment variables, aliases, and other shell settings
bashrc is typically used for user-specific settings, while .profile is system-wide
Examples: setting PATH variable, defining aliases, setting prompt
Code using multithreading to scan 3 log files for different patterns and write matches in o/p file with low memory footprint.
Use Python's threading module to create multiple threads for each log file
Use regex to search for patterns in each log file
Write matches to output file using a thread-safe queue
Use a memory-efficient data structure like deque to store log file lines
Code to run as a service to scan CPU/memory every 30 sec and calculate min, max, avg and moving avg of last 300 sec.
Use a loop to run the code every 30 sec
Use psutil library to get CPU/memory usage
Store the values in a list and calculate min, max, avg and moving avg using numpy library
Use threading to run the code in the background as a service
I was interviewed in Jan 2021.
Round duration - 90 Minutes
Round difficulty - Medium
It was a zoom call with a SDE-2 person, after 15 mins into my background he jumped directly to the questions
Given a Binary Tree comprised of 'N' nodes with integer values, your task is to print the zigzag traversal of the tree.
The zigzag pattern implies th...
Implement a function to print the zigzag traversal of a Binary Tree.
Traverse the Binary Tree level by level, alternating the direction of traversal for each level.
Use a queue to keep track of nodes at each level and a flag to switch the direction of traversal.
Print the values of nodes in the zigzag order as described in the problem statement.
Convert a given binary tree into its mirror tree, where the left and right children of all non-leaf nodes are interchanged.
An integer ‘T’ denoting the number o...
Convert a binary tree into its mirror tree by interchanging left and right children of non-leaf nodes.
Traverse the tree in a recursive manner and swap the left and right children of each node.
Use a temporary variable to swap the children of each node.
Ensure to modify the tree in place without creating a new tree.
Example: For the input tree 1 2 3 4 -1 5 6 -1 7 -1 -1 -1 -1 -1 -1, the mirror tree will have inorder travers
You are given a binary tree consisting of 'N' unique nodes and a start node where the burning will commence. The task is to calculate the time in minutes required to completely b...
Calculate the time in minutes required to completely burn a binary tree starting from a given node.
Start burning from the given node and spread fire to adjacent nodes each minute
Track the time taken for each node to burn completely
Return the maximum time taken to burn the entire tree
Round duration - 90 Minutes
Round difficulty - Medium
Again this was a Problem Solving round taken by a SDE-2
Given a Directed Acyclic Graph (DAG) consisting of V
vertices and E
edges, your task is to find any topological sorting of this DAG. You need to return an array of size ...
Implement a function to find any topological sorting of a Directed Acyclic Graph (DAG).
Use Depth First Search (DFS) to find the topological ordering of the vertices.
Start by visiting a vertex and recursively visit its adjacent vertices before adding it to the result array.
Maintain a visited array to keep track of visited vertices and avoid cycles.
Once all vertices are visited, reverse the result array to get the topolo...
Round duration - 100 Minutes
Round difficulty - Hard
This round was with a SDE-3(Principal Engineer)
Find the number of trailing zeroes in the factorial of a given number N
.
The first line contains an integer T
representing the number of test cases.
Each of the...
Count the number of trailing zeros in the factorial of a given number.
Count the number of factors of 5 in the factorial of the given number N.
Divide N by 5, then by 25, then by 125, and so on, and sum up the quotients to get the total number of trailing zeros.
Example: For N=10, 10/5=2, so there are 2 factors of 5 in 10!, hence 2 trailing zeros.
Round duration - 90 Minutes
Round difficulty - Hard
This round was scheduled with a SDE-3/SDE-4(Senior Principal Engineer):
He directly started with questions after my introduction of 5mins
Round duration - 90 Miinutes
Round difficulty - Medium
Discussion with Hiring Manager
A thief is planning to steal from several houses along a street. Each house has a certain amount of money stashed. However, the thief cannot loot two adjacent houses. Determi...
Determine the maximum amount of money a thief can steal from houses without looting two consecutive houses.
Use dynamic programming to keep track of the maximum money that can be stolen up to each house.
At each house, the thief can either choose to steal from the current house or skip it and steal from the previous house.
The maximum amount of money that can be stolen without looting two consecutive houses is the maximum
Round duration - 75 Minutes
Round difficulty - Easy
This round was with VP in Redwood City , it was scheduled around 11:00 pm IST
Tip 1 : Be solid with the basics of Ds, Algo. Good to have end to end projects which are hosted on cloud/Github.
Tip 2 : Its always good to be presentable and have good communications skills
Tip 3 : Be honest, clear in approach and always walkthrough your thought process to the interviewer, If you dont know something kindly refuse , dont try to fake anything
Tip 1 : Mention your projects and experience at the top. Be clear on what was done, a brief on how it was done, language /tech stack involved. If possible try to host and make it accessible. You never know if you can present it with just one click.
Tip 2 : Choose a balance between, white spaces and text, it should be well indented, no grammatical errors.
Tip 3 : It takes less than 2 min to scan a resume. Don't mention things which are irrelevant.
I was interviewed in Apr 2021.
I applied via Naukri.com and was interviewed in Sep 2020. There was 1 interview round.
I was interviewed before Jun 2016.
I prefer Python because of its simplicity, readability, and extensive libraries.
Python is known for its simplicity and readability, making it easier to write and understand code.
Python has a large number of libraries and frameworks that can be used to quickly develop applications.
Python's syntax is clean and concise, allowing for faster development and easier maintenance.
Python is widely used in various domains such as...
I want to work with Pubmatic because of their innovative technology solutions and strong reputation in the industry.
Pubmatic is known for their cutting-edge technology solutions in the digital advertising space
I admire Pubmatic's strong reputation and track record in the industry
I believe working at Pubmatic will provide me with valuable learning opportunities and career growth
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