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How to Prepare for Oracle 1Z0-908: MySQL 8.0 Database Exam
Preparation Guide for Oracle 1Z0-908: MySQL 8.0 Database Administrator Exam
Introduction
Oracle, based in California, is an American multinational Information Technology company. Oracle is an international company that develops software applications for business. To help enterprises develop their operations, Oracle provides a variety of cloud-based applications and systems as well as hardware and services. Data management, business analytics, IT operations management, enterprise resource planning, security, and emerging technologies are the focus of Oracle’s applications. Oracle is best known for its database software and technology. Oracle Database, a relational Database Management System (DBMS), is one of the most popular corporate database products.
Oracle also develops and builds tools and technologies for database management systems for middle-tier applications, Human Capital Management systems (HCM), Customer Relationship Management systems (CRM), Enterprise Resource Planning systems (ERP), and Supply Chain Management systems (SCM). Oracle Database commonly known as Oracle Database Management System (DBMS) is a multi-model database management system. It is a widely used database to run tasks for Data warehousing and Online Transaction processing databases. Different service providers make Oracle Database accessible on cloud, premises, or a hybrid cloud installation.
This exam guide gives a brief introduction to the topics of 1Z0-908 practice exams and 1Z0-908 dumps.
NEW QUESTION 20
You reconfigure and start a slave that was not replicating for several days.
The configuration file and CHANGE MASTERcommand are correct.
Examine the GTID information from both master and slave:
Which statement is true?
- A. Replication will work.
- B. Replication will fail because the master has already purged transactions with cccccccc-cccc-cccc- cccc-ccccccccccccGTIDs.
- C. Replication will fail because the slave has purged more aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa transactions than the master.
- D. Replication will fail because of inconsistent numbers in cccccccc-cccc-cccc-cccc-cccccccccccc GTIDs.
- E. Replication will fail because the master does not have the required transaction with bbbbbbbb-bbbb- bbbb-bbbb-bbbbbbbbbbbbGTIDs in its binary logs.
Answer: C
Explanation:
Explanation/Reference: https://bugs.mysql.com/bug.php?id=86643
NEW QUESTION 21
Which two storage engines provide a view of the data consistent with the storage system at any moment?
(Choose two.)
- A. InnoDB
- B. MEMORY
- C. ARCHIVE
- D. NDB
- E. MyISAM
Answer: B,E
Explanation:
Explanation/Reference: https://zetcode.com/mysql/storageengines/
NEW QUESTION 22
You want to check the values of the sort_buffer_sizesession variables of all existing connections.
Which performance_schematable can you query?
- A. variables_by_thread
- B. global_variables
- C. session_variables
- D. user_variables_by_thread
Answer: C
Explanation:
Explanation/Reference: https://dev.mysql.com/worklog/task/?id=6629
NEW QUESTION 23
Which two MySQL Shell commands are excluded from the InnoDB Cluster creation procedure? (Choose two.)
- A. dba.createCluster()
- B. cluster.addInstance()
- C. cluster.setPrimaryInstance()
- D. dba.configureLocalInstance()
- E. dba.configureInstance()
- F. dba.checkInstanceConfiguration()
- G. cluster.forceQuorumUsingPartitionOf()
Answer: C,G
NEW QUESTION 24
Which three statements are true about MySQL replication? (Choose three.)
- A. Binary logging must be enabled on the master in order to replicate to other instances.
- B. A replication user must have the SELECT privilege for all tables that need to be replicated.
- C. Any instance can have multiple slaves, but it can have only one master.
- D. Each slave must have its own MySQL user for replication.
- E. Each instance in a replication topology must have a unique server ID.
- F. Replication can use only TCP/IP connections.
- G. Binary logs contain only transactions originating from a single MySQL instance.
Answer: A,B,E
NEW QUESTION 25
You plan to take daily full backups, which include the ndbinfoand sys (internal) databases.
Which command will back up the databases in parallel?
- A. mysqlpump --all-databases > full-backup-$(date +%Y%m%d).sql
- B. mysqldump --all-databases > full_backup-$(date +%Y%m%d).sql
- C. mysqldump --single-transaction > full-backup-$(date +%Y%m%d).sql
- D. mysqlpump --include-databases=% > full-backup-$(date +%Y%m$d).sql
Answer: B
Explanation:
Explanation/Reference: https://mysqlserverteam.com/introducing-mysqlpump/
NEW QUESTION 26
Examine this command, which executes successfull
mysqlbackup --defaults-file=/backups/server-my.cnf --backup-dir=/backups/full copy-back Which statement is true about the copy-back process?
- A. It restores files from the backup directory to their original MySQL server locations.
- B. The copy-back process makes inconsistent backups.
- C. The copy-back process is used to overwrite a new backup over an existing backup.
- D. It restores files from the data directory to their original MySQL server locations.
Answer: A,C
NEW QUESTION 27
Examine this MySQL client command to connect to a remote database:
mysql -h remote.example.org -u root -p --protocol=TCP --ssl-mode=
Which two --ssl-mode values will ensure that an X.509-compliant certificate will be used to establish the SSL/TLS connection to MySQL?
- A. VERIFY_CA
- B. PREFERRED
- C. VERIFY_IDENTITY
- D. DISABLED
- E. REQUIRED
Answer: E
NEW QUESTION 28
Which two MySQL Shell commands are excluded from the InnoDB Cluster creation procedure? (Choose two.)
- A. dba.createCluster()
- B. cluster.addInstance()
- C. cluster.setPrimaryInstance()
- D. dba.configureLocalInstance()
- E. dba.configureInstance()
- F. dba.checkInstanceConfiguration()
- G. cluster.forceQuorumUsingPartitionOf()
Answer: C,G
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/E17952_01/mysql-shell-8.0-relnotes-en/news-8-0-16.html
NEW QUESTION 29
Which two are true about binary logs used in asynchronous replication? (Choose two.)
- A. They contain events that describe only administrative commands run on the master.
- B. They are pulled from the master to the slave.
- C. They contain events that describe database changes on the master.
- D. They contain events that describe all queries run on the master.
- E. They are pushed from the master to the slave.
Answer: C,E
Explanation:
Explanation/Reference: https://www.oracle.com/technetwork/community/developer-day/mysql-replication-presentation-
485890.pdf (14)
NEW QUESTION 30
On examination, your MySQL installation datadir has become recursively world read/write/executable.
What are two major concerns of running an installation with incorrect file privileges? (Choose two.)
- A. Data files could be deleted.
- B. Extra startup time would be required for the MySQL server to reset the privileges.
- C. Users could overwrite configuration files.
- D. MySQL binaries could be damaged, deleted, or altered.
- E. SQL injections could be used to insert bad data into the database.
Answer: A,B
NEW QUESTION 31
You must run multiple instances of MySQL Server on a single host.
Which three methods are supported? (Choose three.)
- A. Use systemdwith different settings for each instance.
- B. Start mysqldor mysqld_safeusing different option files for each instance.
- C. Run MySQL Server docker containers.
- D. Use resource groups to lock different instances on separate CPUs.
- E. Use system tools to lock each instance to its own CPU.
- F. Run mysqldwith --datadirdefined for each instance.
Answer: A,B,F
Explanation:
Explanation/Reference:
NEW QUESTION 32
Which two statements are true about MySQL server multi-source replication? (Choose two.)
- A. It uses only time-based replication conflict resolution.
- B. It is not compatible with auto-positioning.
- C. It relies on relay_log_recovery for resilient operations.
- D. It does not attempt to detect or resolve replication conflicts.
- E. It must use GTID replication.
- F. It needs to be re-instanced after a crash to maintain consistency.
Answer: A,E
NEW QUESTION 33
Examine the modified output:
Seconds_Behind_ Mastervalue 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. This value shows only I/O latency and is not indicative of the size of the transaction queue.
- C. One or more large tables do not have primary keys.
- D. The parallel slave threads are experiencing lock contention.
- E. The master is producing a large volume of events in parallel but the slave is processing them serially.
Answer: B,E
Explanation:
Explanation
NEW QUESTION 34
Examine these statements and output:
Which statement is true?
- A. The user is authenticated as the anonymous proxy user ‘’@’%’.
- B. The user failed to define a username and the connecting username defaulted to ‘’@’%’.
- C. The user is authorized as the accounting@localhostuser.
- D. The user is authorized as the rsmith@localhostuser.
- E. The user is logged in with --user=accountingas an option.
Answer: D
NEW QUESTION 35
Examine this MySQL Shell command:
dba.rebootClusterFromCompleteOutage()
Which two statements are true? (Choose two.)
- A. It picks the minimum number of instances necessary to rebuild the quorum and reconfigures InnoDB Cluster.
- B. It stops and restarts all InnoDB Cluster instances and initializes the metadata.
- C. It reconfigures InnoDB Cluster if the cluster was stopped.
- D. It only starts all InnoDB Cluster instances.
- E. It is not mandatory that all instances are running and reachable before running the command.
- F. It performs InnoDB Cluster instances rolling restart.
- G. It only stops and restarts all InnoDB Cluster instances.
Answer: E,F
NEW QUESTION 36
Examine this command and output:
Which two statements are true? (Choose two.)
- A. The lock is at the table object level.
- B. The lock is a row-level lock.
- C. The lock is at the metadata object level.
- D. The lock is a shared lock.
- E. The lock is an intentional lock.
- F. The lock is an exclusive lock.
Answer: A,F
NEW QUESTION 37
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. This value shows only I/O latency and is not indicative of the size of the transaction queue.
- C. One or more large tables do not have primary keys.
- D. The parallel slave threads are experiencing lock contention.
- E. The master is producing a large volume of events in parallel but the slave is processing them serially.
Answer: B,E
NEW QUESTION 38
Which two commands will display indexes on the partstable in the manufacturing schema? (Choose two.) \
- A. SHOW INDEXES FROM manufacturing.parts;
- B. SELECT * FROM information_schema.COLUMN_STATISTICS;
- C. EXPLAIN SELECT INDEXES FROM manufacturing.parts;
- D. SELECT * FROM information_schema.statistics WHERE table_schema=’manufacturing’
AND TABLE_NAME=’parts’; - E. DESCRIBE manufacturing.parts;
Answer: B,D
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/E11882_01/server.112/e40540/indexiot.htm#CNCPT912
NEW QUESTION 39
Which three actions are effective in capacity planning? (Choose three.)
- A. buying more RAM
- B. buying more CPU
- C. basing expected growth on an average of the last 3 years
- D. buying more disk
- E. adding circular replication nodes for increased DML capability
- F. monitoring OS resources for patterns
- G. consulting the application team about any future projects and use
- H. upgrading to the latest application version
Answer: C,F,G
NEW QUESTION 40
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