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XK0-006 Practice Question: A script receives a JSON object where keys are…

A script receives a JSON object where keys are user IDs. Which command extracts the 'status' of user id '123'?

⚠ Common exam trap

Watch out — candidates often default to using `select(.id=="123")` as if the JSON were an array of objects with an 'id' field, failing to recognize that the user IDs are the object keys themselves, requiring direct key access with `.["123"]`.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

echo "$json" | jq '.["123"].status'

The JSON object uses user IDs as keys, so `.["123"]` directly accesses the object property for user ID '123', and `.status` extracts the 'status' field from that nested object. The `jq` syntax `.["key"]` is the standard way to access a property by a string key in a JSON object.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    echo "$json" | jq '.status'

    Why it's wrong here

    Attempts to access .status at the root, not within a specific key.

  • ✗

    echo "$json" | jq '. | select(.id=="123") | .status'

    Why it's wrong here

    Assumes an array of objects with .id, not a key-based object.

  • ✗

    echo "$json" | jq '.[] | select(.id=="123") | .status'

    Why it's wrong here

    Iterates over array elements, not applicable for an object with keys.

  • ✓

    echo "$json" | jq '.["123"].status'

    Why this is correct

    Correctly accesses the object by key and extracts status.

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Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This XK0-006 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-006 exam.