Deliveroo Interview Questions, Process, and Tips

1 hr. moderate sql sceraio questions

Moderate 1 hr modelling and system design

Q1. Moderate 30 mins
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Design a cron parser

Q1. Design a system to distribute 6M burgers in 10 minutes.
Ans. 
Utilize multiple distribution centers, automated burger assembly lines, and efficient transportation to distribute 6M burgers in 10 minutes.
• Set up multiple distribution centers strategically located to cover a wide area.

• Implement automated burger assembly lines to quickly produce a large number of burgers.

• Utilize high-speed transportation methods such as drones or conveyor belts to deliver burgers to various locations.

• ...read more
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Q1. 2-3 standard scenarios
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Q1. How you resolved conflicts in your team
Ans. 
I resolved conflicts in my team by promoting open communication, active listening, and finding common ground.
• Encouraged team members to openly express their concerns and perspectives

• Actively listened to all parties involved to understand their viewpoints

• Facilitated discussions to find common ground and reach a mutually agreeable solution
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Q2. About a time where you received difficult feedback
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Q1. Design a system that distributes 6Million burgers in 10 min
Ans. 
Utilize multiple distribution centers, automated assembly lines, and efficient transportation to distribute burgers quickly.
• Set up multiple distribution centers in strategic locations to cover a wide area

• Implement automated assembly lines to quickly prepare and package burgers

• Utilize efficient transportation methods such as drones or high-speed delivery vehicles

• Coordinate logistics and timing to ensure smooth and timel
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Q2. No user can claim more than once. You can over distribute but not under distribute
Ans. 
Ensure each user can only claim once, can distribute extra but not less
• Implement a system to track claimed rewards by users

• Set up validation to prevent users from claiming more than once

• Consider implementing a queue system to distribute rewards fairly

• Use a database to store user claims and track distribution
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Q1. Take home assignment: Implement Custom Cron job parser
Ans. 
Implement a custom cron job parser as a take-home assignment for Software Engineer II position.
• Understand the cron syntax and how it works

• Parse the cron expression into separate fields (minute, hour, day of month, month, day of week)

• Implement logic to calculate the next execution time based on the current time and cron expression

• Handle edge cases like leap years, different month lengths, etc.

• Test your implementation wi
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Q2. Interview: Add support to year fields, Get Next N schedules
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Q1. Overview of my experience and how it is relevant to the applied role.
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Q1. Tell me about a time when you handled difficult stakeholder
Ans. 
Handled a difficult stakeholder by actively listening, addressing concerns, and finding a mutually beneficial solution.
• Actively listened to the stakeholder's concerns and validated their feelings

• Communicated openly and transparently about the situation

• Worked collaboratively to find a solution that met both parties' needs
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1. MCQs on software knowledge around REST APIs, database, deployment, etc.
2. Problem solving - Rate Limiter up to last K seconds
3. Implementation question - Write a solution to find the best restaurant in a city given a RESTful paginated API

Design a cron expression parser

Simple coding test with 1 coding problem (Leetcode medium) + 1 api (easy) + 1 Sql( easy)

Assignment was
- WAP for cron string parser
- in the follow-up interview, I was asked to print the next nth instance when a string is passed.

Q1. Design a system where 10 m burgers are on sale for just 10 mins
Ans. 
A system to sell 10 million burgers in 10 minutes
• Implement a high-traffic online ordering platform

• Utilize pre-ordering and queue management systems to handle the rush

• Have a countdown timer for the 10-minute sale period

• Ensure sufficient stock and staff to meet demand

• Offer limited-time promotions to attract customers
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Q2. Need to think about missing burger scenarios
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Q1. Lots of deep diving on the current project. Be prepared for behavioural questions. Do use STAR methodology
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Q2. Do study Company tech blogs
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