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Computer science · lesson 4 of 4

Accessibility and performance

Text that identifies a control to assistive technology.

University8 practice questionsNotes + worked examples
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Learn the ideas

Prerequisites: Basic computer literacy.

Accessible name

Text that identifies a control to assistive technology.

Keyboard access

The ability to operate interactive features without a pointing device.

Alternative text

A textual equivalent for meaningful non-text content.

Performance budget

A practical limit for resource size or runtime cost used to protect speed.

Worked examples

Example 1

Which term best matches this description: Text that identifies a control to assistive technology.

Accessible name is the matching concept in this lesson.

Accessible name

Example 2

Which term best matches this description: The ability to operate interactive features without a pointing device.

Keyboard access is the matching concept in this lesson.

Keyboard access

Check your understanding

8 questions

Decimals or fractions are accepted for numeric answers. Proofs and written responses use sample answers and require human marking. This is practice, not a protected examination.

1 Which term best matches this description: Text that identifies a control to assistive technology.

Show answer and explanation

Accessible name

Accessible name is the matching concept in this lesson.

2 Which term best matches this description: The ability to operate interactive features without a pointing device.

Show answer and explanation

Keyboard access

Keyboard access is the matching concept in this lesson.

3 Which concept would you apply first in a situation where a textual equivalent for meaningful non-text content.

Show answer and explanation

Alternative text

The scenario directly calls for Alternative text.

4 Name the concept described as: A practical limit for resource size or runtime cost used to protect speed.

Show answer and explanation

Performance budget

The intended concept is Performance budget.

5 Which statement about Accessible name is most accurate?

Show answer and explanation

Text that identifies a control to assistive technology.

The definition in the lesson notes gives the required condition.

6 Explain one important difference between Accessible name and Keyboard access.

Sample answer and marking guidance

Accessible name: Text that identifies a control to assistive technology. Keyboard access: The ability to operate interactive features without a pointing device.

Credit a clear distinction using both definitions and an appropriate example if supplied.

7 Give a short example showing how Alternative text would be used in practice.

Sample answer and marking guidance

A valid example should demonstrate this idea: A textual equivalent for meaningful non-text content.

Credit a relevant scenario that applies the concept rather than merely naming it.

8 Summarize why Performance budget matters in the lesson “Accessibility and performance”.

Sample answer and marking guidance

Performance budget matters because A practical limit for resource size or runtime cost used to protect speed.

Credit the core purpose, scope and any important limitation from the notes.

Further reading and review references

These are reference links, not copied exercises, institutional endorsement or proof of independent review.