AFL Telecommunications Data Engineer Interview Questions

Compare ETL and ELT, and explain when ELT is the better pipeline pattern.

ETLELTData ModelingAFL Telecommunications

Preferred tools and patterns for data modeling and pipeline architecture in a modern data platform.

InfrastructureToolsData ModelingAFL Telecommunications

Approach for handling missing data in an ML data pipeline, including validation, imputation, and safe downstream consumption.

InfrastructureETLBatch ProcessingAFL Telecommunications

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityAFL Telecommunications

Tests ownership in diagnosing and fixing a slow data pipeline, with emphasis on root-cause analysis, communication, and measurable impact.

data pipelinesOwnershipPrioritizationAFL Telecommunications

Tests your ability to build correct and efficient deduplication logic in Python for real datasets.

Hash TablesStringsSortingAFL Telecommunications