Question 1

How would you copy 1TB of data daily?

Accepted Answer

**Tools**: AWS DataSync, rclone, distcp, rsync. **Network**: Dedicated link or cloud transfer. **Parallelism**: Multipart, parallel streams. **Incremental**: rsync, CDC after initial. **Scheduling**: Cron, Airflow off-peak. 1TB/day ≈ 12 MB/s; 1 Gbps sufficient. Checksum verify; retry; monitor throughput....

Question 2

What are the different data sources you have used?

Accepted Answer

Databases (Postgres, Oracle—CDC, bulk). APIs (REST, GraphQL). Files (CSV, JSON, Parquet on S3/GCS). Streaming (Kafka, Kinesis). SaaS (Salesforce, Stripe via Fivetran). Data lakes (Delta, Iceberg). Legacy (mainframe, FTP). Tailor to experience....

Question 3

What types of data do you work with?

Accepted Answer

Structured (SQL, CSV). Semi-structured (JSON, Avro, Parquet). Unstructured (logs, text, images). Temporal (time-series, events). Geospatial. Example: 'Semi-structured Kafka JSON; structured RDS; Parquet lake; log data.' Formats and use cases; schema-on-read vs -write.

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