Volkswagen Devops Engineer Interview Questions and Answers

I was asked about Rust and it's nuances: How the memory management model works, and then asked to write a program to read and write files to disk, as well as accept command line arguments using Rust's standard library.

Q1. How do you work on code that someone else has written?
Ans. 
I review the code thoroughly, understand its functionality, and make necessary changes while following coding standards.
• Review the code to understand its functionality

• Follow coding standards and best practices

• Make necessary changes while ensuring code quality

• Communicate with the original author if needed
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Q2. How do you debug and solve problems that might've gotten missed during Unit Testing after they've been presented by QA?
Ans. 
I use a combination of debugging tools, logs, code reviews, and collaboration with team members to identify and fix issues.
• Utilize debugging tools such as breakpoints, watchpoints, and step-through debugging to pinpoint the root cause of the issue.

• Analyze logs and error messages to gather more information about the problem.

• Review the code changes made since the last successful unit test to identify potential causes of ...read more
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Q3. How do you improve the performance/memory footprint of your Rust program, without relying on any external crates, profilers, or architectural changes? Assume that logging and monitoring libraries etc. are ...read more
Ans. 
To improve performance/memory footprint of Rust program without external tools, focus on optimizing algorithms, data structures, and memory management.
• Optimize algorithms to reduce time complexity

• Use efficient data structures like HashMaps or Vecs

• Minimize memory allocations by reusing objects or using stack allocation

• Avoid unnecessary copying of data

• Implement lazy evaluation to defer computations until needed
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Q1. Where do you see yourself in 3 years time?
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Q2. Why did you leave your previous organisation after such a short stint?
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Q1. 1. Coding question related to Comparator. 2. Android Questions medium level. 3. Collection Framework Java. 4. OOPs concept related questions.
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Q1. Usual HR round for Relocation, Salary, etc. discussion.
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Q1. C++ basic questions on OOPS principles. Questions on QT/QML.
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