University Computer science practice

What is on the worksheet

1. Give a short example showing how Uncertainty would be used in practice.

2. Which statement about Selector is most accurate?

   1. A pattern that chooses which elements a CSS rule targets.
   2. The content, padding, border and margin dimensions of an element.
   3. Adapting layout and presentation to different viewport sizes and capabilities.
   4. The rule system that resolves competing CSS declarations.

3. Which term best matches this description: An operation combining rows according to a relationship condition.

   1. One-to-many
   2. Join
   3. Left join
   4. Inner join

4. Which statement about Join is most accurate?

   1. An operation combining rows according to a relationship condition.
   2. A join retaining all rows from the left side plus matching right-side rows.
   3. A join returning rows with matches under the join condition.
   4. A relationship where one row can correspond to several rows in another table.

5. Which term best matches this description: Held-out data used to assess performance after model choices are made.

   1. Training set
   2. Test set
   3. Baseline
   4. Metric

6. Which concept would you apply first in a situation where a conditional function choosing between outputs based on a logical test.

   1. SUM
   2. AVERAGE
   3. IF
   4. COUNTIF

7. Name the concept described as: Adapting layout and presentation to different viewport sizes and capabilities.

8. Which concept would you apply first in a situation where data representing the current condition of an interface.

   1. DOM
   2. State
   3. Event
   4. Validation

9. Which concept would you apply first in a situation where a value constrained to reference a key in another relation.

   1. Schema
   2. Table
   3. Primary key
   4. Foreign key

10. Summarize why Least privilege matters in the lesson “Authentication and access control”.

11. Which is an important test input for a search function?

    1. Only a screenshot
    2. Only a large output font
    3. An empty collection
    4. Only one usual successful case

12. Summarize why Document outline matters in the lesson “HTML structure and semantics”.

13. Name the concept described as: Giving only the access needed for the intended task.

14. Which statement about Event is most accurate?

    1. A browser occurrence such as a click, input or key press.
    2. The object representation of a document that scripts can inspect and change.
    3. Checking input against expected rules before using it.
    4. Data representing the current condition of an interface.

15. Give a short example showing how Patch would be used in practice.