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Oracle 1Z0-908: MySQL 8.0 Database Administration

Introduction to Oracle 1Z0-908: MySQL 8.0 Database Administrator Exam

Oracle 1Z0-908: MySQL 8.0 Database Administrator Administration Exam assesses the abilities of the Database Administrators and System Administrators who have at least 1 year of experience in RAC and Grid Infrastructure. The candidates should have the ability to install, manage, tracking, tuning, and restoring RAC databases, cluster, and Oracle Automatic Storage Management (ASM). They should have a good understanding of the architectures of the ASM, Clusterware, and Oracle RAC databases. They should also know how to install, setup, backup, and recovery monitoring and tuning of these components.

Oracle Real Application Clusters (RAC) in database computing is a choice for Oracle Database software developed by Oracle Corporation, it provides clustering software and high availability in Oracle database environments. With the Enterprise Version, Oracle Corporation includes RAC, provided the nodes are clustered using Oracle Clusterware. Oracle RAC allows several machines when accessing a single database, to run Oracle RDBMS software simultaneously, offering to cluster.

The Oracle Grid Infrastructure for an independent server is the Oracle software that offers system support for a database including the file system, volume management, and automation of the restart process. If you want to utilize the Oracle restart or Oracle Automatic Storage Management (ASM) services, you have to install Oracle grid infrastructure before installing Oracle Database.

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Earning the Oracle 1Z0-908 certification can open doors to new career opportunities and provide a competitive edge in the job market. Certified MySQL 8.0 Database Administrators are in high demand, and their skills are valued by organizations that rely on MySQL databases for their operations. Moreover, the certification demonstrates a commitment to ongoing learning and professional development, which is highly valued by employers.

Oracle MySQL 8.0 Database Administrator Sample Questions (Q128-Q133):

NEW QUESTION # 128
Which two are true about differences between logical and physical upgrades of MySQL databases? (Choose two.)

A. Physical upgrades are much faster because they do not require restarting the mysqld process.
B. Post-upgrade table storage requirements after logical upgrades are usually smaller than that after physical upgrades.
C. Physical upgrades are performed for current instances on bare metal deployments, whereas logical upgrades are used for virtual machines or containerized instances.
D. Post-upgrade table storage requirements after physical upgrades are usually smaller than that after logical upgrades.
E. Physical upgrades leave data in place, whereas logical upgrades require data to be restored from mysqldump-type backups taken before the upgrades.
F. Logical upgrades are much faster because they do not require restarting the mysqld process.

Answer: E,F

NEW QUESTION # 129
Examine the modified output:

Seconds_Behind_ Master value is steadily growing. What are two possible causes? (Choose two.)

A. The master is most probably too busy to transmit data and the slave needs to wait for more data.
B. The master is producing a large volume of events in parallel but the slave is processing them serially.
C. This value shows only I/O latency and is not indicative of the size of the transaction queue.
D. One or more large tables do not have primary keys.
E. The parallel slave threads are experiencing lock contention.

Answer: B,C

NEW QUESTION # 130
You issue this command:
SHOW SLAVE STATUS -
In the output, there is a value for Seconds_behind_master.
How is this time calculated?

A. It is the time between the I/O thread receiving details of the master's last transaction and the time it was written to the relay log on the slave.
B. It is the time between the most recent transaction written to the relay logs and the time it was committed on the master.
C. It is the time between the I/O thread receiving details of the master's last transaction and the time it was applied by the SQL thread.
D. It is the time between the most recent transaction applied by a SQL thread and the time it was committed on the master.

Answer: D

NEW QUESTION # 131
There are five MySQL instances configured with a working group replication.
Examine the output of the group members:

Which two statements are true about network partitioning in the cluster? (Choose two.)

A. A manual intervention to force group members to be only the working two instances is required.
B. The cluster has built-in high availability and updates group_replication_ip_whitelist to remove the unreachable nodes.
C. There could be both a 2 node and 3 node group replication still running, so shutting down group replication and diagnosing the issue is recommended.
D. The group replication will buffer the transactions on the online nodes until the unreachable nodes return online.
E. The cluster will shut down to preserve data consistency.

Answer: B,E

NEW QUESTION # 132
Examine this query and output:

Which two statements are true? (Choose two.)

A. 35 rows from the city table are included in the result.
B. The optimizer estimates that 51 rows in the countrytable have Continent = ‘Asia’.
C. It takes more than 8 milliseconds to sort the rows.
D. The countrytable is accessed as the first table, and then joined to the city table.
E. The query returns exactly 125 rows.

Answer: A,B

NEW QUESTION # 133
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