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LinkedIn Interview Questions and Answers
76 Interview questions
Ninja and Sorted Array Merging Problem
Ninja is tasked with merging two given sorted integer arrays ARR1 and ARR2 of sizes 'M' and 'N', respectively, such that the merged result is a single sorted array wi...
Merge two sorted arrays into one sorted array in place.
Use two pointers to compare elements from both arrays and place them in the correct position in ARR1.
Start from the end of ARR1 and compare elements from both arrays, placing the larger element at the end of ARR1.
Continue this process until all elements from ARR2 are merged into ARR1.
Word Distance Calculation
Given a document represented as an array/list ARR of words with length N, find the smallest distance between two given words for multiple queries. The distance is defined as the d...
Find the smallest distance between two words in a document for multiple queries.
Iterate through the document array to find the indices of the two words in each query.
Calculate the absolute difference between the indices to get the distance.
If a word from the query is not present in the document, return the length of the document array.
Repeat the process for each query and output the smallest distance for each.
Combination Sum Problem Statement
Given an array of distinct positive integers ARR and a non-negative integer 'B', find all unique combinations in the array where the sum is equal to 'B'. Numbers can be ch...
Find all unique combinations in an array where the sum is equal to a given target sum, with elements in non-decreasing order.
Use backtracking to generate all possible combinations.
Sort the array to ensure elements are in non-decreasing order.
Track the current combination and sum while backtracking.
Terminate recursion when the sum equals the target sum.
Avoid duplicates by skipping elements that have been used in pr...
Level Order Traversal Problem Statement
Given a binary tree of integers, return the level order traversal of the binary tree.
Input:
The first line contains an integer 'T', representing the number of tes...The problem requires implementing a function to return the level order traversal of a binary tree.
Implement a function that takes the root of the binary tree as input and returns the level order traversal of the tree.
Use a queue data structure to perform level order traversal.
Process each level of the tree one by one, starting from the root node.
Print the node values at each level in the order they appear from lef...
Counting Triangles in Graphs
Given two graphs – a directed graph DIR_GRAPH and an undirected graph UNDIR_GRAPH – you are tasked with counting the number of triangles in each of the graphs.
Example:
In th...
Count the number of triangles in a directed and undirected graph.
Parse the input to extract vertices, edges, and edges between vertices.
Implement a function to count triangles in both directed and undirected graphs.
Return the counts of triangles for each test case.
Sum of Digits Problem Statement
Given an integer 'N', continue summing its digits until the result is a single-digit number. Your task is to determine the final value of 'N' after applying this operation i...
Given an integer, sum its digits until a single-digit number is obtained.
Iteratively sum the digits of the integer until a single-digit number is reached
Output the final single-digit integer for each test case
Handle multiple test cases efficiently
Stock Trading Maximum Profit Problem
Given the stock prices for 'N' days, your goal is to determine the maximum profit that can be achieved. You can buy and sell the stocks any number of times but can only...
The goal is to determine the maximum profit that can be achieved by buying and selling stocks on different days.
Iterate through the stock prices and buy on days when the price is lower than the next day, and sell on days when the price is higher than the next day.
Calculate the profit by summing up the differences between buying and selling prices.
Repeat the process for each test case and output the maximum profit ...
Bit Majority Number Generation
You are given an array arr consisting of N integers. Construct a number from these integers such that, for each bit position, if the quantity of set bits (1s) is greater than...
Generate a number based on majority set bits in given integers array.
Iterate through each bit position and count set and unset bits
Construct the resulting number based on majority set bits at each position
Return the final constructed number
Ninja's Complement Problem Statement
Every day, Ninja dreams of a number but does not understand its significance. Upon investigation, Ninja discovers that converting this number to binary, taking its comp...
Convert a number to binary, take its complement, and convert back to decimal.
Convert the given number to binary representation
Take the complement of the binary number by swapping '1's and '0's
Convert the complement back to decimal representation
Return the complement number for each test case
OOP allows for code reusability, modularity, and easier maintenance.
Encapsulation: Bundling data and methods together to protect data from outside interference.
Inheritance: Allows for the creation of new classes based on existing classes, promoting code reuse.
Polymorphism: Objects can be treated as instances of their parent class, allowing for flexibility and extensibility.
Modularity: Breaking down a program into ...
LinkedIn Interview Experiences
69 interviews found
Anonymous
I applied via LinkedIn and was interviewed in Nov 2024. There was 1 interview round.
(2 Questions)
- Q1. Minimum Knight Moves (LC Medium)
- Q2. OS, CN, DB concepts like multithreading, semaphore, tcp vs udp, transaction and ACId properties. Java concepts like stack vs heap(memory), error vs exception. Any 1 Project discussion for 10 mins
Interview Preparation Tips
Selected
Prepare for a mock success review with the client, during which they will provide you with data for analysis. You will need to analyze this data and offer recommendations to your customers. You have approximately five days to prepare.
Selected
I applied via Approached by Company and was interviewed in Aug 2024. There were 3 interview rounds.
Asked Fizbuzz and Char replace in a string
(2 Questions)
- Q1. Basic of Linux OS
- Q2. Network troubleshooting
(2 Questions)
- Q1. Design a monitoring system
- Ans.
Design a monitoring system for SiteOps
Identify key metrics to monitor such as server uptime, response time, and error rates
Implement monitoring tools like Nagios, Zabbix, or Prometheus to track these metrics
Set up alerts for critical thresholds to notify the team in case of issues
Create dashboards to visualize the data and trends for easy monitoring
Regularly review and update the monitoring system to ensure it remains ...
- Q2. Examples of automation
- Ans.
Automation in SiteOps involves using tools and scripts to streamline processes and reduce manual tasks.
Automated deployment scripts for deploying code changes to servers
Monitoring tools that automatically alert when server resources are low
Automated backup processes for data protection
Scheduled tasks for routine maintenance like database cleanup
Skills evaluated in this interview
I appeared for an interview in Apr 2025, where I was asked the following questions.
- Q1. What are the steps to create a live chat feature for YouTube live streams? Make it scalable, UI focused
- Ans.
Creating a scalable live chat feature for YouTube live streams involves real-time messaging, UI design, and backend architecture.
WebSocket Implementation: Use WebSockets for real-time communication, allowing users to send and receive messages instantly without refreshing the page.
Scalable Backend: Implement a microservices architecture with load balancers to handle high traffic during live streams, ensuring reliability...
- Q2. 2 DSA coding questions - Tree reverse coding question - O(1) datastructures implementation
Selected
I applied via Job Fair and was interviewed in Jul 2024. There were 2 interview rounds.
More focus on dp,graphs.
(2 Questions)
- Q1. Focus on backend concepts,routing.
- Q2. Question on flood fill algo,backtracking.
(2 Questions)
- Q1. Find the leaves of the tree.
- Ans.
Leaves of a tree are the nodes with no children in a tree data structure.
Traverse the tree and identify nodes with no children.
Use depth-first search or breadth-first search algorithms to find leaves.
Examples: In a binary tree, leaves are nodes with no left or right child.
In a general tree, leaves are nodes with no children in their child list.
- Q2. Find the LCA of tree.
(2 Questions)
- Q1. What projects you worked upon?
- Q2. What internships you did?
- Ans.
I completed internships at ABC Company and XYZ Company during my undergraduate studies.
Interned at ABC Company working on web development projects
Interned at XYZ Company assisting with software testing and quality assurance
Gained hands-on experience in coding, debugging, and problem-solving
Interview Preparation Tips
Skills evaluated in this interview
I appeared for an interview in Feb 2025, where I was asked the following questions.
- Q1. Given a url and asked to get query params from the url and follow ups on it like what if there are some escape characters how do you handle it? is there any dom API which can give you directly the query pa...
- Q2. Write a string repeat function
- Ans.
A string repeat function generates a new string by repeating the input string a specified number of times.
Define a function named `repeatString` that takes two parameters: `str` (the string to repeat) and `num` (the number of repetitions).
Use a loop or string methods to concatenate the string `num` times.
Example: `repeatString('abc', 3)` should return 'abcabcabc'.
Consider edge cases: if `num` is 0, return an empty stri...
Selected
I applied via LinkedIn and was interviewed in Apr 2024. There were 4 interview rounds.
This was a technical round where they check how you approach a problem. The questions were around SQL, Linux commands, basics of HTML and Rest API basic troubleshooting
(1 Question)
- Q1. Behavioural Round where managers interact directly with you on your previous experiences, achievements and failures
(1 Question)
- Q1. One more culture fit round where manager checks your hunger for learning and contributing to the company. Also, checks if you align with Linkedin's culture & values
(1 Question)
- Q1. This was my last round with HR where they discuss your salary & benefits
I applied via LinkedIn and was interviewed in Jul 2024. There were 2 interview rounds.
(1 Question)
- Q1. General discussion on previous experiences
Case study on any industry review, with inmail, discovery call and elevator pitch
I applied via Naukri.com and was interviewed in Oct 2024. There were 2 interview rounds.
Online test on hacker rank . difficult level
Assignmemt on sorting array
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