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Oracle MySQL 8.0 Database Administrator Sample Questions (Q21-Q26):

NEW QUESTION # 21
You have just installed MySQL on Oracle Linux and adjusted your /etc/my.cnf parameters to suit your installation.
Examine the output:

What statement is true about the start attempt?

A. MySQL server continued to start up even though another process existed.
B. systemd attempted to start mysqld, found another systemd mysqld process running, and shut it down.
C. MySQL server was not started due to a problem while executing process 2732.
D. systemd waited for 30 seconds before timing out and start up failed.
E. systemd found the mysqld service disabled and failed to start it.

Answer: B

NEW QUESTION # 22
Your MySQL server was upgraded from an earlier major version.
The sales database contains three tables, one of which is the transactions table, which has 4 million rows.
You are running low on disk space on the datadir partition and begin to investigate.
Examine these commands and output:

Which two statements are true? (Choose two.)

A. Truncating the sales and leads table will free up disk space.
B. Truncating the transactions table will free up the most disk space.
C. Executing ALTER TABLE transactions will enable you to free up disk space.
D. The transactions table was created with innodb_file_per_table=OFF.
E. Executing SET GLOBAL innodb_row_format=COMPRESSED and then ALTER TABLE transactions will free up disk space.

Answer: D,E

NEW QUESTION # 23
Which step or set of steps can be used to rotate the error log?

A. Rename the error log file on disk, and then execute FLUSH ERROR LOGS.
B. Execute SET GLOBAL log_error = ‘<new error log file>’.
C. Execute SET GLOBAL expire_logs_days=0to enforce a log rotation.
D. Execute SET GLOBAL max_error_count = <number of messages at point to rotate>.

Answer: A

Explanation:
Explanation/Reference: https://blog.pythian.com/mysql-log-rotation/

NEW QUESTION # 24
Examine these statements, which execute successfully:
CREATE ROLE r_world_rd;
GRANT SELECT ON world.* TO r_world_rd;
CREATE USER john IDENTIFIED BY 'P@ssw0rd';
GRANT r_world_rd TO john;
Examine these statements issued by user John:

What is the reason for the error?

A. John has not activated the role.
B. John needs to reconnect to the database.
C. The statement was blocked by MySQL Firewall.
D. The DBA needs to execute FLUSH PRIVILEGES.

Answer: A

NEW QUESTION # 25
A colleague complains about slow response time on your website.
Examine this query and output:

What is the most likely cause for the high number of lock waits?

A. You use the InnoDB storage engine and statements wait while data is inserted.
B. You use the MyISAM storage engine for most common tables.
C. The Innodb Buffer pool is full.
D. Your table accesses wait for the operating system level flush.

Answer: A

NEW QUESTION # 26
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Pass Guaranteed 2025 Oracle 1Z0-908: MySQL 8.0 Database Administrator–High Hit-Rate Exam Vce Format

Exam Oracle 1Z0-908 Experience - Reliable 1Z0-908 Test Materials

Oracle MySQL 8.0 Database Administrator Sample Questions (Q21-Q26):

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