DataEngPrep.tech
QuestionsBlogStore
Get PDF Bundle
Home/Questions/System Design/Architecture/How would you handle data quality issues in a real-time ingestion pipeline?

How would you handle data quality issues in a real-time ingestion pipeline?

System Design/Architectureeasy0.2 min readPremium
Frequency
Low
Asked at 1 company
Category
179
questions in System Design/Architecture
Difficulty Split
15E|6M|158H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Goldman Sachs
Interview Pro Tip

Pro-Move: 'Flink job with side-output for bad records. DLQ to S3; daily report. Reprocess job after schema fix. <0.01% to DLQ.'

Key Concepts Tested
spark
Expert AnswerPremium
43 wordsInterview-ready
**Strategy**: (1) Validate at source—schema registry, API validation; (2) Stream validation—Flink/Spark checks (nulls, types, ranges); (3) DLQ—quarantine invalid for triage; (4) Monitoring—alert on DLQ growth; (5) Reprocess from DLQ after fix. Don't block stream; use side-outputs; fail fast....
The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations. It covers performance optimization strategies, common pitfalls to avoid, and real-world examples from companies like Goldman Sachs. The answer also includes follow-up discussion points that interviewers commonly explore.

Continue Reading the Full Answer

Unlock the complete expert answer with code examples, trade-offs, and pro tips - plus 1,863+ more.

Create Free Account - Unlock 30 Answers
Get PDF Bundle - from $21

Or upgrade to Platform Pro - $39

Engineers who used these answers got offers at

AmazonDatabricksSnowflakeGoogleMeta

Related System Design/Architecture Questions

hardWhat architecture are you following in your current project, and why?FreeeasyCDC During Migration - explain approaches for real-time Change Data CaptureFreehardBriefly explain the architecture of Kafka.FreehardDescribe the data pipeline architecture you've worked with.FreehardExplain the trade-offs between batch and real-time data processing. Provide examples of when each is appropriate.Free

According to DataEngPrep.tech, this is one of the most frequently asked System Design/Architecture interview questions, reported at 1 company. DataEngPrep.tech maintains a curated database of 1,863+ real data engineering interview questions across 7 categories, verified by industry professionals.

← Back to all questionsMore System Design/Architecture questions →