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Oriserve Interview Questions, Process, and Tips
Top Oriserve Interview Questions and Answers
- Q1. duplicate element in arrayasked in Backend Developer interview
- Q2. What is SPA and how is react SPA?asked in Frontend Developer Intern interview
- Q3. Agrregation pipeline in mongodbasked in Associate Software Engineer interview
Oriserve Interview Experiences
7 interviews found
Anonymous
(2 Questions)
- Q1. Duplicate element in array
- Ans.
Find and return the duplicate element in an array of strings.
Iterate through the array and keep track of elements seen so far using a hash set.
If an element is already in the hash set, return it as the duplicate element.
Example: ['apple', 'banana', 'apple', 'orange'] should return 'apple' as the duplicate element.
- Q2. Async await in js
- Ans.
async await in JavaScript is a way to write asynchronous code in a synchronous manner.
async functions return a Promise
await keyword is used to pause the execution of async functions until a Promise is settled
async/await makes asynchronous code easier to read and write compared to using callbacks or Promises
Skills evaluated in this interview
Backend Developer Interview Questions asked at other Companies
(2 Questions)
- Q1. Cant specify as per company policy
- Q2. Cant specify
- Ans.
The question was related to designing a scalable system for handling large amounts of data.
Focus on distributed systems and scalability
Consider using technologies like Hadoop, Spark, or Kafka
Discuss strategies for data partitioning and replication
.Cant specify as per company policy
(1 Question)
- Q1. Cant specify as per company policy
Interview Preparation Tips
Software Engineer Interview Questions asked at other Companies
Ganshyam Shukla
I was interviewed in Feb 2025.
(2 Questions)
- Q1. DSA question of DP
- Q2. Backend and Database discussion
Backend Developer Intern Interview Questions asked at other Companies
I applied via Campus Placement and was interviewed in Aug 2024. There was 1 interview round.
(2 Questions)
- Q1. What is react dom?
- Ans.
React DOM is a package that provides DOM-specific methods that can be used to render React components.
React DOM is used to render React components in the DOM.
It provides methods like ReactDOM.render() to render components.
React DOM takes care of updating the DOM to match the React components.
- Q2. What is SPA and how is react SPA?
- Ans.
SPA stands for Single Page Application. React is a popular JavaScript library for building SPAs.
SPA is a web application that loads a single HTML page and dynamically updates the page as the user interacts with it.
React is a JavaScript library for building user interfaces, including SPAs.
React uses a virtual DOM to efficiently update the UI without reloading the entire page.
React Router is commonly used with React to h
Skills evaluated in this interview
Frontend Developer Intern Interview Questions asked at other Companies
Oriserve interview questions for popular designations
I applied via LinkedIn and was interviewed in Jun 2024. There were 3 interview rounds.
(2 Questions)
- Q1. Profile Related
- Q2. Internship Related
(1 Question)
- Q1. Project Related
CI-CD related pipeline using Git, Jinkins.
Interview Preparation Tips
Devops Engineer Interview Questions asked at other Companies
Selected
I was interviewed in Nov 2023.
(2 Questions)
- Q1. Asked about Javascripts output based questions and some questions of Mongo DB
- Q2. One question related to setTimeout output based whose answer was lying in hoisting of var
(2 Questions)
- Q1. I was asked show my project repos and then was asked about questions related to those code and mongo queries
- Q2. Agrregation pipeline in mongodb
- Ans.
Aggregation pipeline in MongoDB is a framework for data aggregation operations.
Pipeline stages are used to process documents in a collection.
Operators like $match, $group, $project are used in pipeline stages.
Results can be transformed, sorted, grouped, and filtered using aggregation pipeline.
Example: db.collection.aggregate([{$match: {field: value}}, {$group: {_id: '$field', count: {$sum: 1}}}, {$sort: {count: -1}}])
Interview Preparation Tips
- node.js
- Javascript
- MongoDB
Skills evaluated in this interview
Associate Software Engineer Interview Questions asked at other Companies
Jobs at Oriserve
Mazhar Alam
Palindrome question asked to solved in 10 minutes
(2 Questions)
- Q1. Normal hr question
- Q2. Why you want to join
Interview Preparation Tips
Software Engineer Trainee Interview Questions asked at other Companies
Interview questions from similar companies
I was interviewed before Dec 2020.
(2 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
This round was purely based on Data Structures and Algorithms . One has to be fairly comfortable in solving Algorithmic problems to pass this round . Both the questions asked were quite common and luckily I had already prepared them from CodeStudio and LeetCode.
- Q1.
Binary Tree Traversals Problem Statement
Given a Binary Tree with 'N' nodes, where each node holds an integer value, your task is to compute the In-Order, Pre-Order, and Post-Order traversals of the binar...
- Ans.
Compute the In-Order, Pre-Order, and Post-Order traversals of a Binary Tree given in level-order format.
Implement functions to perform In-Order, Pre-Order, and Post-Order traversals of a Binary Tree.
Use level-order input to construct the Binary Tree.
Traverse the Binary Tree recursively to generate the required traversals.
Ensure proper handling of null nodes represented by -1 in the input.
Return the three traversals as
- Q2.
Reverse Linked List Problem Statement
Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.
Input:
The first line of input is an intege... - Ans.
Reverse a singly linked list by altering the links between nodes.
Iterate through the linked list and reverse the links between nodes
Use three pointers to keep track of the current, previous, and next nodes
Update the links between nodes to reverse the list
Return the head of the reversed linked list
(1 Question)
Round duration - 45 Minutes
Round difficulty - Medium
This round basically tested some concepts from Data Structures and File Manipulation .
- Q1.
Intersection of Two Arrays Problem Statement
Given two arrays
AandBwith sizesNandMrespectively, both sorted in non-decreasing order, determine their intersection.The intersection of two arrays in...
- Ans.
The problem involves finding the intersection of two sorted arrays efficiently.
Use two pointers to iterate through both arrays simultaneously.
Compare elements at the pointers and move the pointers accordingly.
Handle cases where elements are equal and update the intersection array.
Return the intersection array as the result.
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
I applied via Campus Placement
Interview Preparation Tips
Experience: They selected 10 students from our college from CS and IT .They are looking for guys with extra projects done during college .App development will be a bonus ,contribution to open source and competitive programming will help for shortlisting.
Some of my friends had research papers published and they too got selected.
Round: Test
Experience: Have to write code snippet for 4 questions in 45 minutes
1.Difference between hour hand and minute hand
2.longest palindromic sub string.
3.Product Array puzzle
4.Some question related to matrix
Tips: All question were from geeksforgeeks
So practice it well ..u will make through it
Round: Test
Experience: Long Discussion on projects
They will scan each and every line of your Resume ,so dont write bullshits..
I wrote about interest in AI and got screwed..Discussion on college projects and final year project.
Then asked me to design a snake and ladder game OOPS concepts
Told me to find sum of all elements of sub matrix..(hint pre-processing the matrix)
Asked me about sessions and cookies
Gave a query to write on database indexing (dont remember exactly)
Asked me the code of the difference between hour hand and minute hand and extended it wid the second hand
Asked me as how to implement a dictionary
asked about TRIES ,CODE SNIPPET ON THE SHARED DOCS
One of my friend was asked to implement (set) of STL
Tips: The interviewer was cool guy..helped me a lot always made me comfortable.Interact with them as much as possible
Round: Test
Experience: Wid the CTO of the company .
Started wid the projects again .ACID properties,Database transactions,Concurrency Control
Optimization in database.
Then he asked me to code a function
Given a hash function applied on letters of English words ,un-hash it.Took me 45 minutes to reach the solution ,he helped me a lot.
Asked me to write the code for diameter of a binary tree
Asked me write the code for Boolean Matrix
One of my friend was asked to a question in which there was a bug in a m*n matrix and we have to find the bug(hint dfs or bfs)
Tips: keep calm ,,just keep talking ad he will help u a lot...
Round: HR
Experience: This was the toughest round for me...I had cleared all the rounds but they rejected me in the HR round ,,,dont know where I screwed..Learn every thing of Zomato..
They offered me an internship and thereafter they would look to give a PPO ...!!!lets see what happens
Skills: Coding Skills And Knowledge On Data Structures
Duration: 3
College Name: NIT Srinagar
Interview Questionnaire
9 Questions
- Q1. Write a regex for email validation?
- Ans.
Regex for email validation
Start with a string of characters followed by @ symbol
Followed by a string of characters and a period
End with a string of characters with a length of 2-6 characters
Allow for optional subdomains separated by periods
Disallow special characters except for . and _ in username
- Q2. Parse the XML? and store the output in JSON. Discussed different approaches?
- Q3. Print prime numbers in a given range and optimize the solution?
- Ans.
Print prime numbers in a given range and optimize the solution.
Use Sieve of Eratosthenes algorithm to generate prime numbers efficiently
Start with a boolean array of size n+1, mark all as true
Loop through the array and mark all multiples of each prime as false
Print all the indexes that are still marked as true
- Q4. Puzzle – 25 horses – 5 lanes, find fastest 3 horses?
- Q5. Web related questions on Sessions and cookies?
- Q6. A lot of discussion on my resume, experience etc
- Q7. Find angle between hour hand and minute hand in clock if time is given? Write a program or pseudo code?
- Ans.
Find angle between hour and minute hand in a clock given the time.
Calculate the angle made by the hour hand with respect to 12 o'clock position
Calculate the angle made by the minute hand with respect to 12 o'clock position
Find the difference between the two angles and take the absolute value
If the angle is greater than 180 degrees, subtract it from 360 degrees to get the smaller angle
- Q8. A hash function was written to convert a string into a hash. Write a un-hash function to revert it(from hash to string)?
- Ans.
To un-hash a string, use a reverse algorithm to convert the hash back to the original string.
Create a reverse algorithm that takes the hash as input and outputs the original string
Use the same logic as the hash function but in reverse order
If the hash function used a specific algorithm, use the inverse of that algorithm to un-hash the string
- Q9. He discussed about expectations and role. Asked me if I have any questions. He said to me “yaha aana hai to marwani padegi. tyar ho”? I smiled and asked what are the work timings? He said 9-9 and I was kin...
Interview Preparation Tips
Skills: Web development, JSON, Algorithm
College Name: na
Motivation: Overall process was not very tough. But they have start up culture. People work their for 11-12 hours a day. Sometimes on Saturday as well. So people who are geeks or have nothing in life to do except their job can go and join
Skills evaluated in this interview
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