DB Schenker Senior System Testing Engineer Interview Questions and Answers

Q1. Sorting algorithms
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Q1. Detailed project diacussion
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Q1. Basic hr questions
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Q1. 1) OOPS 2) SOLID 3) Design Patterns 4) SQL Concepts
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Q2. LINQ joins on 2 tables
Ans. 
LINQ joins on 2 tables allow for combining data from both tables based on a common key.
• Use the 'join' keyword in LINQ to join two tables based on a common key

• Specify the key to join on using 'equals' keyword

• Select the desired columns from both tables in the result
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Q3. Example of Open close principle
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Open close principle states that a class should be open for extension but closed for modification.
• Classes should be open for extension through inheritance or implementing interfaces

• Classes should be closed for modification to avoid breaking existing code

• Example: Using abstract classes or interfaces to define behavior and allowing subclasses to implement specific functionality
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Q1. Basic string related coding questions
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Q2. Core java questions
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Q1. How to identify and solve race condition.
Ans. 
Identifying and solving race conditions involves understanding concurrent execution and implementing synchronization mechanisms.
• Understand the critical sections of code where race conditions can occur

• Use synchronization mechanisms like locks, semaphores, or atomic operations to control access to shared resources

• Implement thread-safe data structures or use thread-safe libraries to avoid race conditions

• Use tools like sta...read more
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Q2. Solve an array question on finding the third largest in an unsorted array.
Ans. 
Find the third largest element in an unsorted array of strings.
• Sort the array in descending order.

• Remove duplicates if necessary.

• Return the element at index 2 as the third largest.
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Q1. Have you used multithreading?
Ans. 
Yes, I have used multithreading in software development.
• Multithreading is the ability of a central processing unit (CPU) to execute multiple threads concurrently.

• It allows for parallel execution of tasks, improving performance and responsiveness in applications.

• Multithreading can be used to perform tasks in the background while the main thread handles user interactions.

• Examples of multithreading in software development...read more
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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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Easy to medium level leetcode or hackerrank problem.

Q1. Hashmap based question
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Q2. Microservice Database design
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Offline coding task based on small requirement.

Some coding tests like LinQ queries, Random number generations etc and other C# based technical questions

Q1. It is 1.30 hr. 30 mins of coding or code review based discussion. 30 mins of System design like Photo upload, GPS extraction, satelite image etc. 30 mins of Manager round (not technical, mostly Engineering...read more
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Q1. What are your salary expectations?
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Q2. Share details of your previous job.
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Q3. Why should we hire you?
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Q4. Why are you looking for a change?
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Q5. Where do you see yourself in 5 years?
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Q6. Tell me about yourself.
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Q7. Dedicated 30 mins slots with typical HR questions but nothing to worry.
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