WNS SQL Database Administrator Interview Questions and Answers

Aptitude , reasoning, general questions

Q1. What is spark architecture and partitions
Ans. 
Spark architecture refers to the structure of Apache Spark framework, while partitions are units of data distribution for parallel processing.
• Spark architecture includes components like Driver, Executor, and Cluster Manager

• Partitions are units of data distribution for parallel processing in Spark RDDs

• Increasing the number of partitions can improve parallelism and performance

• Example: In Spark, data is divided into parti...read more
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Q2. What is rdd, trsnsformations
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RDD (Resilient Distributed Dataset) is a fundamental data structure in Apache Spark for distributed data processing. Transformations are operations that create a new RDD from an existing one.
• RDD is a fault-tolerant collection of elements that can be operated on in parallel.

• Transformations are functions that produce a new RDD by applying a computation on the existing RDD.

• Examples of transformations include map, filter,
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Q1. Salary expectations
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Q2. Current ctc n expected ctc
Ans. 
The current CTC (Cost to Company) and expected CTC (Cost to Company) are typically discussed during salary negotiations.
• Be honest about your current salary and provide a realistic expectation for your future salary.

• Consider factors such as your experience, skills, industry standards, and the company's budget when discussing CTC.

• It is important to have a clear understanding of your worth and negotiate accordingly.
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