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Oracle 1Z0-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which three prerequisites are needed for creating an Oracle Linux VM instance in the Oracle Cloud Infrastructure?

A) Custom Image
B) subnet configured on a Virtual Cloud Network (VCN)
C) Object Storage
D) ssh key pair
E) existing VCN
F) bare metal Oracle Linux shape

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

3. What SQL keyword must be specified when creating a foreign key constraint?

A) unique PRIMARY key values for both child and parent tables
B) a TRIGGER on the child table for cascading delete statements
C) an index on the foreign key
D) a REFERENCES in the child table to the parent table
E) the SET_FOREGIN variable in the my .cnf file

4. MySQL Enterprise Masking and De-identification can hide or obfuscate sensitive data, by controlling how the data appears. Which three are MySQL Enterprise Masking and De-identification functions?

A) random data substitution
B) strict or relaxed masking
C) dictionary substitution
D) whitelisting and substitution
E) misspelling

5. An Oracle Cloud Infrastructure customer already has many database instances configured and running in the cloud; however, they are reporting that they are unable to create any more instances.
What could be the problem?

A) The customer does not have proper user rights.
B) The customer account might have reached resource quota/limits.
C) The customer reached the database instance limit of 32.
D) The customer has not kept up with their patching requirements; new instances cannot be created unless the majority or the template of existing instances are up-to-date.

Solutions: