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Choosing Batch vs Real Time

HardPipelines00:00
Ametek
Your interviewer · Data Engineer
In session
Interviewer

Welcome to your interview for the Data Engineer role at Ametek.

The question is on your right: Choosing Batch vs Real Time. Take a moment with it first.

Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen. You have three graded attempts to score 7/10 or better.

Only Submit answer is graded - discussion is free practice.

Problem

Scenario

You're planning a new workflow in a data pipeline and need to decide how it should run. Some consumers may need fresh data quickly, while others can work with scheduled updates if the pipeline is simpler and cheaper.

Question

How do you decide whether a workflow should run in real time or in batch?

What Matters

  • Freshness requirement and business SLA
  • Volume and arrival pattern of data
  • Operational complexity and support burden
  • Replay, backfill, and audit requirements
  • Data quality tolerance for late or missing records

Batch vs Stream

Latency
Complexity
Cost model
Best fit