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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

Question 1

Which three options are valid reasons for using a primary key in a table?

A. maintaining a history of row insertions or updates
B. exporting data faster with mysqldump
C. preventing duplicate keys
D. automatic storage of data in a sorted order
E. to make it easier to change the PRIMARY KEY value
F. increasing performance when using select statements

Question 2

What is true about MySQL Enterprise Transparent Data Encryption (TDE)?

A. Encryption key is stored in a centralized key memory location
B. Enables data-at-rest encryption by encrypting the physical files of the database.
C. Tablespace keys are managed manually behind the scenes.
D. Data is encrypted automatically, in real time, after it is written to storage.

Question 3

You have a backup image file that is backed up using MySQL Enterprise Backup with the -compress option:
/home/mysq1/backup/full/mybackup/myimage. Img

You are required to perform a database restore to a new machine to provision the database. Which command can provision the new database in the datadir as /home/mysql/data/MEB?

A.

B.

C.

D.

E.

Question 4

You execute this statement:
SELECT NULL=NULL;
What is the result?

A. 1
B. FALSE
C. NULL
D. 0
E. TRUE

Question 5

Which three are characteristics of the JSON data type?

A. Key or array references enable quick read-access to look up document elements directly.
B. A set of SQL functions substantially support the SQL utilization of the data type.
C. It is based on the TEXT data type.
D. Comparisons of JSON values are not case-sensitive.
E. It supports indexing directly against the JSON-defined column.
F. It validates the JSON syntax on insert or merge.

Solutions: