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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

Question 1

Consider this SQL statement which is using the innoDB storage engine and with global AUTOCOMMIT = 1:

What is the result after issuing the rollback command?

A. Only the t1 table is created.
B. Only the t2 table is created.
C. Both the tables, t1 and t2, are created.
D. Both the tables, t1 and t2, are not created because there is an explicit ROLLBACK.

Question 2

Which statement would you use to remove the population column from the city table?

A. ALTER TABLE city DROP population;
B. DELETE population FROM city;
C. DROP population FROM city;
D. ALTER TABLE city DELETE population;
E. ALTER TABLE city LESS population;

Question 3

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

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

Question 4

You get a maintenance-notification about your MySQL Enterprise Edition in Oracle Cloud Infrastructure (OCI) Compute instance. What is re the implication?

A. Depending on the planned outage, you may not be affected by it. You need to read the maintenance details in the support notice.
B. You need to agree to the maintenance windows. If not, you are not affected by the outage.
C. There are no maintenance operations planned. You need to do them manually.
D. You can expect an outage of your MySQL OCI instance during the planned time..

Question 5

Which activity will take place if a table is created with both the compression and encryption options?

A. The compression is performed before tablespace data is encrypted.
B. The system generates an error because the COMPRESSION and ENCRYPTION options cannot be used together.
C. The tablespace data is encrypted first and then compression is performed.
D. The compression is performed, the ''data_at_rest_flag" is turned on and the tablespace data is encrypted.

Solutions: