Maersk Senior DBA and Data Engineer Interview Questions and Answers

Basic algorithms testing

Q1. HLD question on chat application
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Q1. Personal & Academics Questions
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Q1. Notice Period & Rotational Shift question
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Q1. Behavioural and Experience based questions
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Q2. Tell be about a time sort of stuff
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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. Basic string related coding questions
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Q2. Core java questions
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Q1. Do while vs while
Ans. 
The do while loop executes the code block once before checking the condition, while the while loop checks the condition before executing the code block.
• do while loop is useful when you want to execute the code block at least once, regardless of the condition.

• while loop is used when you want to execute the code block only if the condition is true.

• Example: do { // code block } while (condition);

• Example: while (condition)
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Q2. What are the types of data types
Ans. 
Data types are classifications of data items that determine the kind of operations that can be performed on them.
• Primitive data types: integers, floating point numbers, characters, booleans

• Composite data types: arrays, structures, classes

• Abstract data types: lists, stacks, queues
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