PAYBACK Interview Questions and Answers

Q1. What is Class and object . explain hierarchial inheritence.
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Q2. Difference bertween deep copy and shallow copy.
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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.

Q1. Introduction to about your self
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Q2. Experience and product knowledge
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Java coding questions, basic Java questions.

Q1. Java basics questions.
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Q2. Live coding.
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Q1. Discussion on previous experience and projects.
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Q2. System design question
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Q1. Questions on SQL, Java advanced, personal projects, Java frameworks, UI based questions, Agile methodologies.
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Q2. Interview discussion with the whole team.
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Q1. Benefits discussion.
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Q2. Salary discussion.
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Q1. Hadoop architecture
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Q2. Spark architecture
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Q3. Difference between stage and task
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A stage is a collection of tasks that perform a specific computation, while a task is a unit of work that is executed on a single executor.
• Stage is a higher-level unit of work that can be broken down into multiple tasks.

• Tasks are individual units of work that are executed on a single executor.

• Stages are used to organize and coordinate tasks in a Spark job.

• Tasks are the actual units of computation that are performed by ...read more
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Q4. Sql questions to solve
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Q5. Scoop
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Q6. Action and transformation in pysaprk
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Actions and transformations are two types of operations in PySpark. Actions return a value to the driver program, while transformations create a new RDD.
• Actions are operations that trigger the execution of the Spark job, such as collect(), count(), and saveAsTextFile().

• Transformations are operations that create a new RDD from an existing one, such as map(), filter(), and reduceByKey().

• Actions are lazy operations, meani...read more
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Q7. Difference between rdd and dataframe
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RDD is a distributed collection of objects, while DataFrame is a distributed collection of data organized into named columns.
• RDD is more low-level and requires manual schema definition, while DataFrame provides a higher-level API with schema inference.

• DataFrames are optimized for processing structured data, while RDDs are more suitable for unstructured data.

• DataFrames support SQL queries and optimizations through Catal...read more
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3 dsa questions medium level

Q1. 2 medium level dp questions based on string and stocks
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Q2. One hard question based on graph
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Q1. Hr questions and java , springboot questions etc
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Asked to write a bank application - which includes adding,removing,transferring of money

How to increase personal insurance revenue to 5x?

Q1. Education Related Questions for Technical.
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Q2. Previous Company Tech Experience available or not.
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Q3. Family Background
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Q4. Technical Questions for Remote Tech Support of Installation of Software.
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