LambdaTest Project Engineer Interview Questions and Answers

A fun filled "game based" test, where you had a target number on top of screen and then you had to burst some bubbles which had mathematical equations. So if the target number is 24, then you had to burst bubbles which had equations like '12 x 2' , '8 x 3' , '20+4', '48÷2' etc.
In another round, you also had to arrange the bricks 🧱 to fit into the space by changing the shape of bricks.
There were other aptitude tests also which tested your memory and reflex actions.
Total 9 different games.

After these 9 games, you need to give a psychometric tests that evaluates your personality. 5 questions x 7 rounds = Total 35 questions.

Q1. Questions based on your knowledge of project management and tools. 1. Introduce yourself 2. Explain your day to day life at work. 3. Difference between Agile and Waterfall. 4. Which ETL tools have you wor...read more
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Q1. 1. How many different types of API do you know about? 2. What's the difference between SOAP API and REST API?
Ans. 
There are two main types of APIs - SOAP API and REST API.
• SOAP API is a protocol-based API that uses XML for communication, while REST API is an architectural style that uses standard HTTP methods like GET, POST, PUT, DELETE.

• SOAP API has a strict set of rules and standards, while REST API is more flexible and lightweight.

• SOAP API requires more bandwidth and resources compared to REST API.

• Examples of SOAP APIs include Sa...read more
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Q2. 3. If you reach out to a vendor for API integration, what information would you look for?
Ans. 
Key information for API integration with a vendor
• Vendor's API documentation

• Authentication methods required

• Rate limits and usage restrictions

• Data formats supported (JSON, XML, etc.)

• Error handling and response codes

• Testing environment availability
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Q3. 4. What are the items in project contract? What factors would you include if you need to create a contract, so that client doesn't hold you for any legal issues?
Ans. 
Items in a project contract and factors to prevent legal issues with clients.
• Scope of work

• Project timeline

• Payment terms

• Deliverables

• Change management process

• Termination clauses

• Confidentiality agreements

• Dispute resolution mechanisms
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Q1. One on one round with Project head. He wanted to understand how a typical project is handled at my current organisation, right from sales handover to closure.
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Q1. Final round before the HR round, was conducted by Founder and CEO. 1. How does your goals and ambitions align with the job?
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Q2. 2. Why do you want to become a Project manager and not a product manager?
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Q3. 3. Why do you want to join Signzy? Are you aligned with the work and culture of Signzy?
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Q4. 4. A strategy based question was asked to check the thought process. If the company is not doing well overall, and your top leadership have abandoned the company and I ask you to take a responsibility of D...read more
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Q1. 1. Resume review and details on each work experience. 2. Salary expectations and what will I do if I am offered a salary which is half of my current CTC? 3. Any offer in hand? 4. Joining date and any exi...read more
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Q1. Basic testing questions covered
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Automation basic they ask

24 questions 30 mins

15 mins on recent affairs

Q1. About internship and general question on data management
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Q2. Data Visualization tools
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Q1. Regarding BMS and system engineering activities
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Q2. System engineer process and tools
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Q1. System engineer role and responsibilities
Ans. 
System engineers design and manage complex systems to ensure they operate efficiently and effectively.
• Designing and implementing computer systems

• Managing system configurations and upgrades

• Troubleshooting system issues

• Collaborating with other IT professionals

• Ensuring system security and data integrity
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Q2. System engineer activity wrt BMS
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Q1. Salary related stuff and expectations
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Q2. Details regarding joining date and last working day
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Round duration - 180 minutes
Round difficulty - Hard

The test link had 3 days expiry so I could attempt test anytime. It was conducted on doselect.com

Q1. 
Equilibrium Indices in a Sequence
You are given an array/list named 'SEQUENCE', which consists of 'N' integers. The task is to identify all equilibrium indices in this sequence.
Explanation:
An equilibr...read more
Ans. 
The task is to find the equilibrium indices of a given sequence, where the sum of elements at lower indices is equal to the sum of elements at higher indices.
• Iterate through the sequence and calculate the total sum of all elements

• Initialize a left sum and right sum as 0

• For each index, update the left sum and right sum and check if they are equal

• If they are equal, add the index to the equilibrium indices

• Return the equil
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Round duration - 60 minutes
Round difficulty - Medium

Video interview round wherein I was asked to wrote code for the problem statements given by the interviewer. The problems were mainly focused on advanced JS concepts like asynchonous progamming, timers, closures, and data structure problems around arrays, sets, linked list etc.

Q1. 
Rearrange Linked List Problem Statement
Given a singly linked list in the form 'L1' -> 'L2' -> 'L3' -> ... 'Ln', your task is to rearrange the nodes to the form 'L1' -> 'Ln' -> 'L2' -> '...read more
Ans. 
The task is to rearrange the nodes of a singly linked list in a specific order without altering the data of the nodes.
• Iterate through the linked list to find the middle node using the slow and fast pointer technique.

• Reverse the second half of the linked list.

• Merge the first and reversed second half of the linked list alternatively to get the desired order.
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Round duration - 30 minutes
Round difficulty - Easy

This was the last round with HR wherein they judged cultural fit and there was discussion on things like my expectations v/s their expectations etc.

Round duration - 30 minutes
Round difficulty - Easy

This round mainly consisted of some questions on advanced JS topics like Execution Context, Callback queue, Micro task queue, Promises, etc.

Round duration - 60 minutes
Round difficulty - Medium

This round was more technical compared to the previous one. The interviewer was a senior developer. If questions were not answered, answers would be given/explained.

Q1. What are some aggregate operators in MongoDB?
Ans. 
Aggregate operators in MongoDB are used for data aggregation and manipulation.
• Some aggregate operators in MongoDB include $sum, $avg, $min, $max, $push, $addToSet, $first, $last, $project, $match, $group, $sort, $limit, $skip.

• Example: db.collection.aggregate([{$group: {_id: '$field', total: {$sum: '$value'}}}])
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Round duration - 30 minutes
Round difficulty - Easy

This round was mainly to assess my experience level, roles, and responsibilities from my previous company. Salary negotiations also happened here.

4 Coding Questions Leetcode Level Medium to Hard. Had to solve it within 1.5 hours.

Was able to solve 2 questions - One hard and one Medium. Hadn't enough time to solve all.

Q1. DSA based round. Was asked to write 3 APIs based on the the given n-ary tree.
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Q2. Questions based on Path, end node, best path, etc.
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Q1. System Design round : Was asked to design RDBMS for the given problem.
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Q1. HM Round : Mostly behavioral based around Twilio Magic Values
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Q1. Bar Raiser Round : Taken by a director. Was asked behavioral questions again.
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Low level Design Problem in Java

Q1. Data Structures - Graph Problem DFS
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System Design with few details