RXO Inc. Senior Engineer Interview Questions and Answers

Q1. What is gear what is two stoke and for stoke engine
Ans. 
Gears are mechanical components that transmit power and motion between rotating shafts. Two-stroke and four-stroke engines are types of internal combustion engines.
• Gears are used to change the speed, torque, and direction of power transmission.

• Two-stroke engines have a simpler design and are lighter than four-stroke engines.

• Four-stroke engines are more fuel-efficient and produce less pollution than two-stroke engines.

• B...read more
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Q2. What is use of latch machine
Ans. 
A latch machine is a digital circuit that stores data and can be used for memory and data storage applications.
• A latch machine is a type of flip-flop circuit that can store a single bit of data.

• It can be used for memory and data storage applications.

• It is commonly used in digital systems such as computers and microcontrollers.

• Examples of latch machines include D-latch, SR-latch, and JK-latch.
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Q1. Related to my job profile
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Q2. What kind of exposure I have in my engineering field?
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Q1. Salary related questions along with past experiences
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Q2. How much salary i need
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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?
Ans. 
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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Q1. Intro and Background
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Q2. Work experience and Javanese Question
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