Crack The Code: Top Azure Data Engineer Interview Questions

Main Ideas and Concepts

• Introduction to Azure Data Factory (ADF)

  ADF is a data orchestration service provided by Microsoft. It is commonly used for data integration and ETL (Extract, Transform, Load) processes.

• Common Interview Questions

  Candidates can expect questions about ADF's relevance in data engineering projects, particularly its ability to connect with over 90 data sources. The importance of ADF in initial data ingestion phases compared to other Azure services like Synapse and Azure Databricks.

• Key Features of Azure Data Factory
  • Connectors: ADF can handle more than 90 connectors for various data sources.
  • Cost Efficiency: ADF is often more cost-effective than other services like Synapse for initial data ingestion.
  • Integration Runtimes: There are three types of integration runtimes:
    • Azure Integration Runtime
    • Self-hosted Integration Runtime
    • Azure SSIS Integration Runtime
• Data Migration Steps

  A structured approach is necessary when migrating data from on-premises to the cloud:

  • Use Self-hosted Integration Runtime.
  • Create a pipeline.
  • Create datasets and linked services.
  • Implement copy activity.
  • Store data in Azure Data Lake Storage (ADLS) Gen2 or Blob Storage.
• Understanding Pipelines and Activities

  A pipeline is a logical grouping of activities designed to achieve specific tasks. Common activities include:

  • Copy Data
  • Data Flow
  • Lookup
  • Execute Pipeline
  • Filter
• Triggers in Azure Data Factory

  Different types of triggers include:

  • Schedule Trigger
  • Tumbling Window Trigger
  • Storage Event Trigger
  • Custom Event Trigger

  Triggers automate the execution of pipelines based on defined schedules or events.

• Copy Activity

  The primary function of copy activity is to move data from one location to another.

• Variables and Parameters

  Variables hold temporary values and can be modified during pipeline execution. Parameters are fixed values that cannot be changed once set.

• Global Parameters

  Global parameters are accessible across multiple pipelines within the same ADF account and cannot be modified during execution.

Methodology for Data Migration

• Use Self-hosted Integration Runtime.
• Create a pipeline.
• Create a dataset.
• Establish linked services.
• Implement copy activity to transfer data.
• Store the data in ADLS Gen2 or Blob Storage.

Speakers or Sources

The video appears to feature a single speaker who discusses Azure Data Factory and provides insights on interview preparation for Azure Data Engineer roles. The speaker also interacts with participants, asking them to share their thoughts and responses in the chat.