Capgemini Gcp Data Engineer Interview Questions, Process, and Tips

Q1. GCP Services, What is use of Bigquery? What is Pubsub,Dataflow,cloud storage. Question related previous roles and responsibility.
Ans. 
Bigquery is a cloud-based data warehousing tool used for analyzing large datasets quickly. Pubsub is a messaging service, Dataflow is a data processing tool, and Cloud Storage is a scalable object storage service.
• Bigquery is used for analyzing large datasets quickly

• Pubsub is a messaging service used for asynchronous communication between applications

• Dataflow is a data processing tool used for batch and stream processin...read more
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Q1. What is your Salary expectations?
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Q1. What are sql joins explain About bigquery related
Ans. 
SQL joins are used to combine rows from two or more tables based on a related column between them.
• SQL joins are used to retrieve data from multiple tables based on a related column between them

• Types of SQL joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• In BigQuery, joins can be performed using standard SQL syntax

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
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Q2. Bigquery, GCS related
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Q1. About project related questions
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Q1. What are the GCP services used in your project
Ans. 
The GCP services used in our project include BigQuery, Dataflow, Pub/Sub, and Cloud Storage.
• BigQuery for data warehousing and analytics

• Dataflow for real-time data processing

• Pub/Sub for messaging and event ingestion

• Cloud Storage for storing data and files
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Q2. What is cloud function
Ans. 
Cloud Functions are event-driven functions that run in response to cloud events.
• Serverless functions that automatically scale based on demand

• Can be triggered by events from various cloud services

• Supports multiple programming languages like Node.js, Python, etc.
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Q3. How to shedule job to trigger every hr in Airflow
Ans. 
To schedule a job to trigger every hour in Airflow, you can use the Cron schedule interval
• Define a DAG (Directed Acyclic Graph) in Airflow

• Set the schedule_interval parameter to '0 * * * *' to trigger the job every hour

• Example: schedule_interval='0 * * * *'
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Q4. Bigquey architecture
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Q5. How display string in reverse using python
Ans. 
Use Python's slicing feature to display a string in reverse order.
• Use string slicing with a step of -1 to reverse the string.

• Example: 'hello'[::-1] will output 'olleh'.
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Q6. What is pub sub and where are you getting used in your project.
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Pub/Sub is a messaging service that allows communication between independent applications.
• Pub/Sub is used for real-time messaging and event-driven systems.

• It is commonly used for data ingestion, streaming analytics, and event-driven architectures.

• Examples of Pub/Sub services include Google Cloud Pub/Sub, Apache Kafka, and Amazon SNS/SQS.
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