Capgemini Data Engineer Interview Questions, Process, and Tips

Q1. Spark optimization technique
Ans. 
Spark optimization techniques improve performance and efficiency of Spark jobs.
• Use partitioning to distribute data evenly across nodes

• Cache intermediate results to avoid recomputation

• Use broadcast variables for small lookup tables

• Optimize shuffle operations by reducing data shuffling

• Tune memory settings for better performance
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Q2. Small file problem in spark
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Small file problem in Spark refers to inefficiency when processing multiple small files in Spark jobs.
• Small files can lead to inefficient resource utilization and slow job execution in Spark.

• One solution is to combine small files into larger files before processing.

• Another solution is to use coalesce or repartition to reduce the number of partitions in RDDs.

• Avoid using HDFS block size smaller than the default block siz
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Q1. Why you leaving your current organization
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Q2. Your future plans
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Q1. What is sql , explain normalizing ?
Ans. 
SQL is a programming language used to manage and manipulate relational databases. Normalizing is the process of organizing data in a database to minimize redundancy.
• SQL stands for Structured Query Language

• It is used to create, modify, and query relational databases

• Normalization is the process of breaking down a database into smaller, more manageable tables to reduce redundancy and improve data integrity

• There are differ...read more
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Q2. What is a database and how it is used ?
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A database is a collection of data that is organized in a way that allows for efficient retrieval and manipulation of data.
• A database is used to store and manage data.

• It allows for easy retrieval and manipulation of data.

• Examples of databases include MySQL, Oracle, and MongoDB.

• Databases are used in various industries such as finance, healthcare, and e-commerce.
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It was easy which included Maths, English, essay writing and Aptitude

Q1. Basic C and SQL questions. Questions regarding my projects.
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Q2. Tell about joins in C
Ans. 
Joins in C are used to combine records from two or more tables based on a related column between them.
• Joins in C are typically implemented using nested loops or hash tables.

• Common types of joins include inner join, outer join, left join, and right join.

• Example: Performing an inner join between two tables to retrieve only the matching records.
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Q3. Asked a question about C
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Q1. Basic behavioral questions
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Q1. Aws basics and about snowflake
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Q2. Sql joins and python questions
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Basic questions , sql and python if ur azure baz=sed to questions on that

Q1. Azure and its details
Ans. 
Azure is a cloud computing platform and service provided by Microsoft.
• Azure offers a wide range of services including virtual machines, storage, databases, and analytics.

• It provides scalability, reliability, and security for businesses to build, deploy, and manage applications.

• Azure supports various programming languages and frameworks, allowing developers to use their preferred tools.

• It offers AI and machine learning ...read more
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Q2. Python and sql questions
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Q3. Basic testimg knowledge
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1. Find the pair from list resulting in maximum product

2. Nth highest salary in sql

Q1. Details about previous projects
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