Data Replication

Duplicate and distribute data across different locations

Data replication is the process of creating and distributing multiple copies of the same data across different locations or systems, providing redundancy and ensuring high availability and fault tolerance.

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Big Data Engineer - Data Replication Example Questions

Test your knowledge of Amazon Simple Storage Service (S3)

Question 1

What is the purpose of conflict resolution in data replication?

To resolve conflicts that arise when the same data is updated in different locations at the same time To encrypt data during replication to secure it To speed up data replication by skipping data that has already been replicated To check for data consistency across all locations To transform data into a common format that can be easily replicated

Correct Answer: To resolve conflicts that arise when the same data is updated in different locations at the same time

Conflict resolution is used to resolve conflicts that occur when multiple copies of the same data are updated at different locations at the same time. This can arise due to network latency, replication delays, or application errors. Conflict resolution is not used to speed up data replication, ensure data consistency, or encrypt data. It may involve transforming data formats, but this is not its primary purpose.

Question 2

Which technique can be used for data replication?

Data Integration Data Cleansing Data Migration Change Data Capture (CDC) Data Virtualization Data Compression

Correct Answer: Change Data Capture (CDC)

Change Data Capture (CDC) is a technique that captures and replicates only the changes made to source data. Data cleansing, migration, virtualization, integration, and compression are not techniques used for data replication.

Question 3

Which data replication technique allows you to maintain a real-time copy of the source data?

High Availability (HA) Replication Streaming Replication Change Data Capture (CDC) Selective Replication Incremental Replication Batch Replication

Correct Answer: Streaming Replication

Streaming replication allows you to maintain a real-time copy of the source data by continuously streaming changes from the source to the replica. Batch replication transfers data in batches, whereas CDC captures and replicates only the changes made to source data. HA replication is a type of partial replication used for disaster recovery, and selective and incremental replication are other replication techniques that do not guarantee real-time replication.

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