PSK Infrastructures Senior Engineer Interview Questions and Answers

Hacker Rank test with medium difficulty

Q1. Technical discussion mainly around system design, different architectures, problem solving and coding question may be asked.
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A case study for a problem statement

Q1. React and virtual dom and life cycle
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Q2. Nextjs and it's core concept
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Nextjs is a React framework that enables server-side rendering and other features for building fast and scalable web applications.
• Nextjs is built on top of React and provides features like server-side rendering, static site generation, and API routes.

• It allows for faster page loads and improved SEO performance compared to traditional client-side rendering.

• Nextjs also supports automatic code splitting, hot module replac...read more
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Logical program on string array collection

Q1. What is SQL? Mssql
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SQL (Structured Query Language) is a standard language for managing and manipulating databases, including Microsoft SQL Server (MSSQL).
• SQL is used to retrieve and manipulate data in relational databases.

• MSSQL is a popular relational database management system that uses SQL.

• SQL queries are used to perform operations like selecting, updating, inserting, and deleting data.

• Example: SELECT * FROM table_name WHERE condition;
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C,c++ ,javaa,python website etc

Q1. Technical Departments
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Q1. Basic physics. Mechanics etc.
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Q2. Acceleration due to gravity
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Acceleration due to gravity is the force that pulls objects towards the center of the earth.
• The acceleration due to gravity on Earth is approximately 9.8 m/s².

• It varies depending on the location and altitude.

• It is responsible for the weight of objects on Earth.

• It is also used in various scientific calculations and experiments.
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There were 2 DSA questions that we had to solve on HackerRank. One of them was a medium dynamic programming question - minimum insertions required to make a string palindrome. The other was a fairly easy question that required knowledge of permutations and combinations. We just had to figure out a maths formula given the situation.
1st round also involved a logical game that we had to play. We were scored based on coding + game and shortlisted for next round.

An interviewer joined me on zoom meet and sent a HackerRank link to a question. It was a medium dynamic programming/backtracking question. I solved it but only half the test cases ran while others threw TLE as my recursive code took exponential time.

Q1. Explain what happens after you search a url on your browser. (Had to explain the whole DNS working)
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Q2. Explain how video calling works. (Had to explain the whole OSI model)
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Q3. Asked possible causes of ClassNotFoundException and MemoryOutOfBoundException
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Q4. Asked 2 or 3 case study questions like designing a car infotainment system.
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Q5. Asked about the usefulness of OOPS.
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Q6. Asked how Java code compiles/runs(had to explain about creation of class file, JVM etc)
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Q7. Asked about working of https.
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Q1. Explain few challenges that you faced during a project/internship.
Ans. 
During my internship, I faced challenges related to communication, time management, and technical skills.
• Communication challenges: Difficulty in effectively conveying ideas and understanding instructions.

• Time management challenges: Struggling to prioritize tasks and meet deadlines.

• Technical skills challenges: Learning new technologies and troubleshooting issues.

• Example for communication challenge: Working in a team whe...read more
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Q2. Where do you see yourself in 5 years?
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In 5 years, I see myself as a Senior Engineer, leading a team and working on complex projects.
• I envision myself taking on more responsibilities and leading a team of engineers.

• I hope to have gained expertise in my field and be recognized as a subject matter expert.

• I aim to work on challenging projects that require problem-solving and innovation.

• I plan to continue learning and staying updated with the latest technologie...read more
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Q3. Explain a project that you did
Ans. 
Developed a mobile app for tracking daily water intake
• Used React Native framework for cross-platform development

• Implemented a user-friendly interface with intuitive design

• Integrated a database to store and retrieve user data

• Implemented push notifications to remind users to drink water

• Conducted testing and debugging to ensure app functionality
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Q4. Tell me about a conflict that you may have faced during a project/internship
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During my internship, I faced a conflict regarding the allocation of resources for a project.
• Conflict arose when team members disagreed on the distribution of resources.

• I suggested a fair and balanced approach to allocate resources based on individual strengths and project requirements.

• We held a team meeting to discuss and resolve the conflict.

• Through open communication and compromise, we reached a consensus on resourc...read more
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