Oracle 1Z1-921 - MySQL 2021 Implementation Essentials

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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

Question 1

The replication for a Master and Slave MySQL Servers is up and running. The disk space for Master Server is continuously growing. The binlog size keeps growing. Which two methods can fix the issue?

A. Execute the purge binary logs statement without argument.
B. Set the expire_logs_days system variable to expire binary log files automatically after a given number of days.
C. On the Master server, disable binlog by removing the --log-bin option.
D. To safely purge binary log files, perform these steps:
E. Delete all binlog files manually on the file system to release storage spaces.

Question 2

Which MySQL Enterprise Edition plug-in replaces real values with substitutes?

A. MySQL Enterprise No-Login Authentication
B. MySQL Enterprise Transparent Data Encryption (TDE)
C. MySQL Enterprise Scalability
D. MySQL Enterprise Data Masking and De-identification
E. MySQL Enterprise Audit

Question 3

Which Oracle product is certified to work with MySQL Enterprise Edition?

A. Oracle Data Pump
B. Oracle Enterprise Backup
C. Oracle Enterprise Manager
D. Oracle Application Express

Question 4

Which query will find rows in a table that have no counterpart in another table?

A. SELECT t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;
B. SELECT left_tbl.*FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id=right_tbl.idWHERE right_tbl.id IS NULL;
C. SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;
D. SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;

Question 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. 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.

Solutions: