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Cognizant Azure Data Engineer Interview Questions and Answers
Cognizant Azure Data Engineer Interview Experiences
7 interviews found
MUVVA ANIL
(1 Question)
- Q1. What is a polybase ?
- Ans.
PolyBase is a technology in Azure that allows you to query data from external sources like Hadoop or SQL Server.
PolyBase enables you to run T-SQL queries on data stored in Hadoop or Azure Blob Storage.
It can also be used to query data from SQL Server, Oracle, Teradata, and other relational databases.
PolyBase uses external tables to define the schema and location of the external data sources.
It provides a seamless way t...
(1 Question)
- Q1. What is serverless sqlpool?
- Ans.
Serverless SQL pool is a feature in Azure Synapse Analytics that allows on-demand querying of data without the need for managing infrastructure.
Serverless SQL pool is a pay-as-you-go service for running ad-hoc queries on data stored in Azure Data Lake Storage or Azure Blob Storage.
It eliminates the need for provisioning and managing dedicated SQL pools, making it more cost-effective for sporadic or unpredictable worklo...
I was interviewed in Dec 2024.
(4 Questions)
- Q1. 2 Python Questions based on Strong and List manipulation.
- Q2. 2 Sql Questions
- Q3. 1 Pyspark Question
- Q4. What is service principal, ADF questions...
(2 Questions)
- Q1. Introduction. Question on last company why left.
- Q2. Salary Negotiation.
Selected
I applied via Naukri.com
(4 Questions)
- Q1. Based on my previous company projects
- Q2. SQL based questions are asked
- Q3. ADF based questions are asked
- Q4. Azure related questions are asked
(1 Question)
- Q1. Reg salary discussion
Interview Preparation Tips
What people are saying about Cognizant
I applied via Referral and was interviewed in May 2024. There was 1 interview round.
(2 Questions)
- Q1. Basic Pyspark questions
- Q2. SQL queries based on join , case and row to column changes
Interview Preparation Tips
- Azure
- pyspark
- sql join
Cognizant interview questions for designations
Subiksha Manojkumar
(1 Question)
- Q1. Regarding experience in previous company
(1 Question)
- Q1. How to copy multiple tables from on-prim to Azure blob storage
- Ans.
Use Azure Data Factory to copy multiple tables from on-premises to Azure Blob Storage
Create a linked service to connect to the on-premises data source
Create datasets for each table to be copied
Create a pipeline with copy activities for each table
Use Azure Blob Storage as the sink for the copied tables
Interview Preparation Tips
Skills evaluated in this interview
Interview Questionnaire
1 Question
- Q1. Whole architecture of azure project, eto solutions using ADF, ADB, few SQL queries , azure sql pool
Interview questions from similar companies
Selected
I applied via Recruitment Consulltant and was interviewed in Aug 2024. There were 3 interview rounds.
(4 Questions)
- Q1. Lets say you have table 1 with values 1,2,3,5,null,null,0 and table 2 has null,2,4,7,3,5 What would be the output after inner join?
- Ans.
The output after inner join of table 1 and table 2 will be 2,3,5.
Inner join only includes rows that have matching values in both tables.
Values 2, 3, and 5 are present in both tables, so they will be included in the output.
Null values are not considered as matching values in inner join.
- Q2. Lets say you have customers table with customerID and customer name, Orders table with OrderId and CustomerID. write a query to find the customer name who placed the maximum orders. if more than one person...
- Q3. Spark Architecture, Optimisation techniques
- Q4. Some personal questions.
(5 Questions)
- Q1. Explain the entire architecture of a recent project you are working on in your organisation.
- Ans.
The project involves building a data pipeline to ingest, process, and analyze large volumes of data from various sources in Azure.
Utilizing Azure Data Factory for data ingestion and orchestration
Implementing Azure Databricks for data processing and transformation
Storing processed data in Azure Data Lake Storage
Using Azure Synapse Analytics for data warehousing and analytics
Leveraging Azure DevOps for CI/CD pipeline aut
- Q2. How do you design an effective ADF pipeline and what all metrics and considerations you should keep in mind while designing?
- Ans.
Designing an effective ADF pipeline involves considering various metrics and factors.
Understand the data sources and destinations
Identify the dependencies between activities
Optimize data movement and processing for performance
Monitor and track pipeline execution for troubleshooting
Consider security and compliance requirements
Use parameterization and dynamic content for flexibility
Implement error handling and retries fo
- Q3. Lets say you have a very huge data volume and in terms of performance how would you slice and dice the data in such a way that you can boost the performance?
- Q4. Lets say you have to reconstruct a table and we have to preserve the historical data ? ( i couldnt answer that but please refer to SCD)
- Q5. We have adf and databricks both, i can achieve transformation , fetching the data and loading the dimension layer using adf also but why do we use databricks if both have the similar functionality for few ...
(1 Question)
- Q1. Basic HR questions
Interview Preparation Tips
- SQL
- Databricks
- Azure Data Factory
- Pyspark
- Spark
Skills evaluated in this interview
I applied via Company Website and was interviewed in Dec 2024. There was 1 interview round.
(2 Questions)
- Q1. SCD type 1 and SCD type 2 in databircks
- Q2. How to pass parameters form ADF to ADB
Interview Preparation Tips
Selected
I applied via Naukri.com and was interviewed in Mar 2024. There was 1 interview round.
(5 Questions)
- Q1. Tell me about yourself
- Ans. Tell about your background and current project work
- Q2. What is azure data factory
- Ans.
Azure Data Factory is a cloud-based data integration service that allows you to create, schedule, and manage data pipelines.
Azure Data Factory is used to move and transform data from various sources to destinations.
It supports data integration and orchestration of workflows.
You can monitor and manage data pipelines using Azure Data Factory.
It provides a visual interface for designing and monitoring data pipelines.
Azure...
- Q3. What is Azure data lake
- Ans.
Azure Data Lake is a scalable data storage and analytics service provided by Microsoft Azure.
Azure Data Lake Store is a secure data repository that allows you to store and analyze petabytes of data.
Azure Data Lake Analytics is a distributed analytics service that can process big data using Apache Hadoop and Apache Spark.
It is designed for big data processing and analytics tasks, providing high performance and scalabili
- Q4. 2nd highest salary from employee table
- Q5. What is index in table
- Ans.
An index in a table is a data structure that improves the speed of data retrieval operations on a database table.
Indexes are used to quickly locate data without having to search every row in a table.
They can be created on one or more columns in a table.
Examples of indexes include primary keys, unique constraints, and non-unique indexes.
Interview Preparation Tips
- Adf
Skills evaluated in this interview
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Cognizant Azure Data Engineer Interview Process
based on 7 interviews
1 Interview rounds
- Technical Round
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Cognizant Azure Data Engineer Reviews and Ratings
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