ProcDNA Software Engineer Interview Questions and Answers

Q1. Singleton in java code. multithreading, spring boot questions.
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Q2. SQL queries for finding highest salary
Ans. 
SQL queries to find highest salary
• Use the MAX() function to find the highest salary

• Combine with the SELECT statement to retrieve the corresponding employee details

• Use the ORDER BY clause to sort the results in descending order

• Use the LIMIT clause to limit the number of results returned
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It was an aptitude test

Q1. It was technical test
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Q2. Sort an array with numbers
Ans. 
Use a sorting algorithm like quicksort or mergesort to rearrange the numbers in ascending or descending order.
• Implement a sorting algorithm like quicksort, mergesort, or bubblesort to rearrange the numbers in the array.

• Ensure the algorithm is efficient and handles edge cases like empty arrays or arrays with duplicate numbers.

• Test the sorting function with different arrays to verify its correctness.

• Example: [5, 2, 9, 1,
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Q1. SQL interview question
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Q2. Stored Procedure and function differences
Ans. 
Stored procedures are precompiled and stored in the database, while functions are compiled and stored in memory.
• Stored procedures are precompiled and stored in the database for reuse.

• Functions are compiled and stored in memory for faster execution.

• Stored procedures can return multiple values, while functions return a single value.

• Functions can be called from within a stored procedure, but stored procedures cannot be ca
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Q3. SQL query flow and window function they will ask
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Complexity level - moderate. Basic concepts.

Q1. Questions to assess how independently a candidate can work.
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Q2. - Can you work independently? - Can you work under pressure in a dynamic environment?
Ans. 
Yes, I have experience working independently and thrive in dynamic environments.
• I have successfully completed multiple projects on my own, demonstrating my ability to work independently.

• I am comfortable making decisions and solving problems without constant supervision.

• I have experience working in fast-paced environments where I had to adapt quickly to changing priorities and deadlines.
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Q1. Self and other tools
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Q2. Jenkins Linux Ansible git AWS
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A question expecting the prod code with out clear instructions

Q1. Buy and Sell Stock
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2 dsa coding questions

Q1. Cannot disclose
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Q1. Cannot disclose
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Q1. Offer discussion
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