Pick the right database answer

Exercise and reference answers

Questions

1. Question

   Which model is most commonly used?

   Choices

   1. Relational
   2. Hierarchical

   Correct choice

   Relational

2. Question

   What does a data type usually specify?

   Choices

   1. The cardinality
   2. The domain

   Correct choice

   The domain

3. Question

   Where do all values of one attribute come from?

   Choices

   1. The same domain
   2. Any domain

   Correct choice

   The same domain

4. Question

   What does redundancy waste?

   Choices

   1. Storage
   2. Sorting

   Correct choice

   Storage

5. Question

   What hides how data is actually stored?

   Choices

   1. The keyboard
   2. The database system

   Correct choice

   The database system

Instructions

Read each question and pick the right answer.

Explanation