QueueBuster Interview Questions and Answers

Q1. Why shifting from government bank
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Q2. Tell about yourself
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Q1. Case based on building a financial application for payments
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The first round was a coding test, which was outsourced to an external vendor. I was asked 2 basic DSA questions, and there was discussions around the time and space complexity, and scope of optimizing the solutions. Post that there were a few questions around Spring Boot features and basic system design. The interviewer was professional throughout the interview, and the interview process felt more like a discussion, as compared to the standard interview process.

There was another round of coding - this time conducted by the organization itself. It consisted of a medium level DSA question on stacks. I wrote the code on my personal IDE and executed it there itself. The interviewer discussed about the possible edge cases and how I would deal with them. Post solving the question I was asked about my previous projects.

Q1. Discuss in detail about a scenario where a challenging production issue was handled.
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Q2. What are your responsibilities as a senior / team lead in the current organization?
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Q3. How did you handle conflicts with junior engineers and reporting managers?
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This was the final round where the discussion was largely around system design and HLD. It started off with questions are system design patterns and concepts. Then I was asked to design a booking design, with discussions around concurrency control and transaction management.

MCQs around CS fundamentals

3 DSA questions on graph

Q1. Hackathon of two parts
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Q1. DSA and system design
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Q1. Things you have worked on in the past
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I have worked on developing and launching new mobile applications for a tech startup.
• Led cross-functional teams to define product requirements

• Conducted market research and user testing to inform product decisions

• Worked closely with designers and engineers to bring products to market

• Managed product roadmap and prioritized features based on user feedback
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Take home assignment on a relevant problem statement for the organization

Q1. Discussion on the assignment
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Q1. Details of your salary and negotiation
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Q1. Asked me to give a self introduction
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Q2. Asked me about college activities
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Q1. Sorting objects based on keys ruby
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In Ruby, you can sort objects based on keys using the sort_by method.
• Use the sort_by method with a block to specify the key to sort by.

• For example, sorting an array of hashes by a specific key: array_of_hashes.sort_by { |hash| hash['key_to_sort_by'] }

• You can also sort objects by multiple keys by chaining sort_by calls.
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Q2. Frequency of arr elements
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Calculate the frequency of elements in an array
• Iterate through the array and count occurrences of each element

• Use a hash map to store element frequencies

• Return the hash map with element frequencies
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Q1. Introduction about me, info about the previously worked projects
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Q2. Pick an random number from an array using random function and two pointer approach
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Use random function and two pointer approach to pick a random number from an array of strings.
• Initialize two pointers at the start and end of the array

• Generate a random index between the two pointers

• Return the element at the random index
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Q1. What is SDLC and STLC?
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SDLC stands for Software Development Life Cycle, which is a process used by software development teams to design, develop, and test high-quality software products. STLC stands for Software Testing Life Cycle, which is a subset of SDLC focused on testing activities.
• SDLC involves planning, designing, coding, testing, and deployment stages.

• STLC involves test planning, test design, test execution, and test closure stages.

• S...read more
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Q2. Explain Bug life cycle
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Bug life cycle is the process of a bug from identification to resolution in software testing.
• Bug is identified by tester

• Bug is logged in bug tracking tool

• Bug is assigned to developer

• Developer fixes the bug

• Bug is retested by tester

• If bug is fixed, it is closed. If not, it is reopened

• Bug is verified in subsequent releases
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Q1. Sql, excel, python, g-sheet
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Q2. Window function
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Q3. Lookup, pivot, graphs, sumif, countif
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Q4. Puzzles, fake coin, 25 horses,
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Q5. Basic business understanding
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