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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. 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) It is based on the TEXT data type.
C) It supports indexing directly against the JSON-defined column.
D) Comparisons of JSON values are not case-sensitive.
E) A set of SQL functions substantially support the SQL utilization of the data type.
F) It validates the JSON syntax on insert or merge.

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

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

3. What are two ways in which customers can receive notifications such as outages, configuration changes, database emergencies, and other information on their Database as a Service instances?

A) Application-to-application messaging
B) Browser pop-ups
C) SMS-notification tab on the dashboard
D) Direct support call from an Oracle representative
E) Email

4. Which is a correct example of creating an Enterprise Encryption function?

A) SET @function = CREATE_ASYMMETRIC_PRIV_KEY(@algo, @key_len);
B) CREATE FUNCTION asymmetric_decrypt RETURNS STRING SONAME ,openss1_udf.so,;
C) VALIDATE FUNCTION create_asymmetric_priv_key WITH ,openssl_udf.so';
D) INSERT INTO t1 (key_co1) FUNCTION(CREATE_ASYMMETRIC_PRIV_KEY(,RSA,, 1024));

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

Solutions: