Ernst & Young Junior Engineer Interview Questions and Answers

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
Ans. 
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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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. They check your Basic knowledge
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Q2. Knowledge related to the post you have applied for.
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3 dsa questions and various golang concepts and 1 concurrency question

Q1. System design questions
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Q1. Explain about past projects.
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Q2. Technology on which you worked.
Ans. 
I have worked on various technologies including Java, Python, AWS, and Docker.
• Developed RESTful APIs using Java and Spring framework

• Implemented machine learning models using Python and scikit-learn library

• Deployed applications on AWS using EC2, S3, and RDS

• Containerized applications using Docker for easy deployment and scaling
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Q3. C language basic but important concepts related to Data type, pointer, etc.
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Q4. Python knowledge check.
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In first round they will ask a pseudocode basics.

In second round they ask a question in coding segment in C,C++, Python

Q1. Wath is your name Wath is heat treatment Wath is melting point of cast iron
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