Which of the following lists all of the model stages are available in the MLflow Model Registry?

Question

Options

• ADevelopment. Staging. Production
• BNone. Staging. Production
• CStaging. Production. Archived
• DNone. Staging. Production. Archived
• EDevelopment. Staging. Production. Archived

• A
  72% (21)
• B
  7% (2)
• C
  14% (4)
• D
  3% (1)
• E
  3% (1)

Explanation

There's an important issue here: the marked correct answer (A) appears to be wrong based on MLflow documentation.

The MLflow Model Registry defines four model stages:

1. None - the default state when a model version is first registered
2. Staging - for models under evaluation/testing
3. Production - for models actively serving traffic
4. Archived - for deprecated model versions no longer in active use

This matches option D, not option A. Option A lists "Development, Staging, Production" - "Development" is not a valid MLflow stage, and it omits both "None" and "Archived."

Why the distractors fail:

• A - "Development" doesn't exist as an MLflow stage; also missing "None" and "Archived"
• B - Correct stages but missing "Archived"
• C - Correct stages but missing "None"
• E - "Development" is not an MLflow stage; it has no such concept

Memory tip: Think of the MLflow lifecycle as Nothing → Staging → Production → Archived, mapping to the four stages: None, Staging, Production, Archived. The acronym NSPA (No Stage Provided Always) can help you recall all four.

I'd strongly recommend double-checking the answer key on this question - the correct answer should be D.

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