In a table for customers, the information about a single customer resides in a single:

a. table

b. column

c. field.

d. entity

e. record

5. Operational resilience in AWS means (choose two)

a. infrastructure costs are reduced

b. all functions are performed more efficiently

c. Reduce unplanned outages

d. Critical workloads run in multiple regions and availability zones for better disaster recovery

6. A data integrity problem is likely to occur if:

a. the database is very complex

b. database has multiple administrators

c. data is duplicated in the database

d. the database has too many keys

7. Which of the following notations in an Entity Relationship Diagram (ERD) means that the entity is optional and the relationship need not have an entity of that type?

a. arrow

b. triangle

c. vertical bar

d. small oval

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