Propelld Software Engineer Trainee Interview Questions and Answers

Q1. Sort array containing 3 colours red, blue, green.
Ans. 
Sort an array of strings representing colors: red, blue, and green, using a simple algorithm for efficiency.
• Counting Sort: Since there are only three colors, we can use counting sort to count occurrences of each color and then reconstruct the array.

• Example: Given ['red', 'blue', 'green', 'red'], count reds (2), blues (1), greens (1) to form ['red', 'red', 'blue', 'green'].

• In-Place Sorting: Alternatively, we can use a t...read more
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Q2. Design Twitter HLD.
Ans. 
Design a high-level architecture for a Twitter-like social media platform.
• User Management: Handle user registration, authentication, and profiles.

• Tweet Management: Allow users to create, read, update, and delete tweets.

• Feed Generation: Implement algorithms to generate personalized feeds based on user interactions.

• Scalability: Use microservices architecture to scale components independently.

• Database Design: Utilize NoSQ...read more
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Q1. DSA question - medium leetcode with arrays
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Q2. System Design question - questions were more focused on what kind of DB, why to choose one DB over other, API endpoints and then LLD
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Q1. Basic SQL Questions
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Q1. Tell me about yourself
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Q2. Tell me about your projects
Ans. 
I worked on various projects focusing on data analysis, software development, and process optimization across different industries.
• Developed a data visualization tool that improved decision-making speed by 30%.

• Led a team in creating a mobile app for patient management, enhancing user engagement by 40%.

• Implemented an automated reporting system that reduced manual work by 50%.
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Q1. Just Basic Introduction
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Q2. Questions Related Past Experience.
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Assignment round - They gave 5 topics to write quotes and short article on the same.

Q1. Only Salary Discussion
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Q1. Work experience and future goals
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Q2. KRAs and expected work
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Real world case study & problem in hackathon environment

Q1. 3 year plans in career
Ans. 
I believe in setting short-term goals to achieve long-term success in my career.
• Setting specific, achievable goals for each year

• Regularly reviewing and adjusting goals based on progress and changes in the industry

• Seeking opportunities for growth and development to advance in my career

• Example: Year 1 - Gain experience in content management, Year 2 - Lead a team of content creators, Year 3 - Develop and implement a compr...read more
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Q2. Learnings from last job
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Learned importance of clear communication, time management, and collaboration in previous role as Content Manager.
• Developed strong communication skills through regular interactions with team members and clients.

• Improved time management by setting clear priorities and deadlines for content creation and publication.

• Enhanced collaboration by working closely with cross-functional teams to ensure content aligned with overal...read more
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Q3. Most difficult situation handled
Ans. 
Managing a crisis situation during a major website outage
• Coordinated with IT team to identify root cause of outage

• Communicated with stakeholders to provide updates and manage expectations

• Implemented temporary solutions to minimize impact on users

• Developed a long-term plan to prevent similar outages in the future
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