200-901 Match each YAML structure to its description. Practice Question

Match each YAML structure to its description.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts

Matches

Scalar mapping

List item

Comment line

Nested mapping

Block scalar (literal)

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

✓

Mapping: An unordered set of key-value pairs, each separated by a colon and space.

In YAML, a mapping (dictionary) uses key: value pairs; a sequence (list) uses '- ' items; a scalar is a single value. The distractors swap definitions or apply collection concepts to scalars.

Answer analysis

Option-by-option breakdown

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

✓
Mapping: An unordered set of key-value pairs, each separated by a colon and space.
Why this is correct
A YAML mapping (or dictionary) uses key: value syntax, with indentation for nesting.
✓
Sequence: An ordered list of items, each prefixed with a dash and space.
Why this is correct
A YAML sequence (or list) is represented as a series of lines starting with '- '.
✓
Scalar: A single value, such as a string, number, or boolean, without any dash or key.
Why this is correct
Scalars are simple values, like hello, 42, or true.
✗
Mapping: An ordered list of items, each prefixed with a dash and space.
Why it's wrong here
Incorrect — this describes a sequence, not a mapping.
✗
Sequence: An unordered set of key-value pairs, each separated by a colon and space.
Why it's wrong here
Incorrect — this describes a mapping, not a sequence.
✗
Scalar: A collection of key-value pairs or items.
Why it's wrong here
Incorrect — scalars are single values, not collections.

Go deeper

200-901 Match each YAML structure to its description. Practice Question

Why each option matters

Option-by-option breakdown

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