Where to start

Data Engineering & MLOps

A short check to suggest a starting chapter. It's advice only: your answers aren't saved, nothing gets unlocked, and it doesn't count as evidence of a skill. It hasn't been tested on learners yet, and the questions are in English.

What's the main reason to use a columnar format such as Parquet for analytics?

Queries can read only the columns they need

It's the only format that can be compressed

It makes rows easier to update one at a time

What does it mean for a load to be idempotent?

It runs in one second

It never fails

Running it twice leaves the same result as running it once

What does a DAG's dependency edge express?

One task must finish before another may start

Two tasks must run on the same machine

One task's retries are shared with another

Is a hashed email address anonymous?

Yes, since hashes can't be reversed

No, since it can still identify a person by matching or guessing

Yes, provided that the table is private

What's needed to reproduce a trained model?

The final accuracy figure

The model's file name

Versions of the code, data, configuration and environment, along with the seed

Input drift has been detected, and accuracy can't be measured yet. What does this show?

The model has certainly become worse

Live data has changed, which warrants investigation, not automatic retraining

The model should be deleted

Understand

Learn by doing. Understand why.

Learn

Explore the programmes Higher education High school Programming Data Science & AI Search

Understand

The method Create an account Log in

Help and privacy

Privacy Contact