DTDC Express Senior Sdet Test Engineer Interview Questions and Answers

It was a normal aptitude test with mathematical questions.

It was a techno-coding test where I had to code while sharing my screen on a live conversation with the interviewer.

Q1. I was primarily asked about managerial questions on adaptability to new technology and creativity if existing solutions don't work.
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Q2. In a situation where your team is not getting a proper result with existing approach your team uses, how would you try to fix it?
Ans. 
I would analyze the current approach, identify the root cause of the issue, brainstorm alternative solutions, and collaborate with the team to implement and test them.
• Analyze the current approach to identify weaknesses

• Brainstorm alternative solutions with the team

• Implement and test the new solutions

• Regularly communicate and collaborate with team members
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Q1. Introduce yourself
Ans. 
I am a Senior Software Engineer with 8 years of experience in developing web applications using Java, Spring, and Angular.
• 8 years of experience in software development

• Proficient in Java, Spring, and Angular

• Strong problem-solving skills

• Experience in leading development teams

• Passionate about learning new technologies
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Q2. Build a digital stopwatch with HTML, CSS, JS
Ans. 
Build a digital stopwatch using HTML, CSS, and JS
• Create HTML structure with buttons for start, stop, and reset

• Use CSS to style the stopwatch display

• Implement JS logic to start, stop, and reset the stopwatch
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Q3. What is your day to day work life looks like?
Ans. 
As a Senior Software Engineer, my day-to-day work involves designing and developing software solutions, collaborating with team members, troubleshooting issues, and staying updated on industry trends.
• Designing and developing software solutions based on project requirements

• Collaborating with team members to discuss project progress and brainstorm solutions

• Troubleshooting and debugging code to fix issues and improve perf...read more
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Q4. Horizontal vs vertical scaling
Ans. 
Horizontal scaling involves adding more machines to distribute load, while vertical scaling involves increasing the power of existing machines.
• Horizontal scaling adds more machines to handle increased load

• Vertical scaling increases the power of existing machines

• Horizontal scaling is more cost-effective and easier to implement

• Vertical scaling may have limitations in terms of hardware capabilities

• Examples: Horizontal sca...read more
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Q5. Load balancer vs API gateway
Ans. 
Load balancer distributes incoming network traffic across multiple servers, while API gateway manages API traffic.
• Load balancer operates at the network layer, distributing traffic based on algorithms like round-robin or least connections.

• API gateway operates at the application layer, providing features like authentication, rate limiting, and caching for APIs.

• Load balancer can balance traffic for any type of application...read more
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Q6. There is a scenario where user wants to upload multiple files at once but provided API can on accept one file at a time, how tackle this scenario gracefully?
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Some leetcode medium problem

System Design and Cloud

Q1. Managerial round casual introduction
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Q1. Salary discussion
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Easy to medium level leetcode or hackerrank problem.

Q1. Hashmap based question
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Q2. Microservice Database design
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Q1. About Azure Cloud, System Design high availability, reliability, performance.
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Coding problem on integer to Roman number conversion.

Q1. Managerial round, why you want to join Maersk ?
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Q1. Api optimisations, query optimisations, how to keep code more extensible, scalable etc
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Q1. Questions related to designing around redis
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Q1. Container with most water
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Q2. Maximum product subarray
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Problem to solve with importance to coding standards

Q1. Indepth knowledge of JS html n CSS
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Q1. Manager round and agile principles
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Q1. HR discussions on the job expectations
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