16. Relational databases represent relationships using ________. a. foreign keys

Question

16. Relational databases represent relationships using ________. a. foreign keys b. file systems c. metadata d. unique identifiers 3

17. Brad, a project manager, wants to build a database to integrate information about employees and tasks that they handle. Brad wants to track information such as task name, percentage completed, and employee name. These aspects that Brad wants to track are called ________. a. identifiers b. records c. primary keys d. entities

18. ________ is a term that came to be used when companies such as Google offered thinclient email such as Gmail for free, as a service. a. Platform as a service b. Software as a service c. Cloud as a service d. Infrastructure as a service

19. If the same data element is stored differently in another table, this is said to be an issue of _____. a. data sufficiency b. data integrity c. inaccurate data d. entity integrity

20. Which of the following is a valid observation of MySQL? a. It is offered by Oracle. b. It is license-free for most applications. c. It is a closed-source database product. d. It is yet to be widely adopted.

Explanation / Answer

16) a).foreign keys

A foreign key is a column or group of columns in a relational database table that provides a link between data in two tables. It acts as a cross-reference between tables because it references the primary key of another table, thereby establishing a link between them

17) d .entities

18) software as a service

Software as a service (or SaaS) is a way of delivering applications over the Internet—as a service. Instead of installing and maintaining software, you simply access it via the Internet, freeing yourself from complex software and hardware management.SaaS applications are sometimes called Web-based software, on-demand software, or hosted software. Whatever the name, SaaS applications run on a SaaS provider’s servers. The provider manages access to the application, including security, availability, and performance.

19)data sufficiency

20)b.it is license free for most applications

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