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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.
NEW QUESTION 33
You are upgrading a MySQL instance to the latest 8.0 version.
Examine this output:
You plan to add this parameter to the configuration: innodb_directories='/innodb_extras' Which statement is true?
- A. It is not necessary because innodb_data_home_dir is already defined.
- B. It defines all innodb tablespace options relative to a starting parent directory.
- C. It adds more temporary workspace in addition to the innodb_tmpdir location.
- D. It allows scanning of other locations to discover more innodb tablespaces.
- E. It moves all innodb tablespaces to the /innodb_extras directory to enable a new innodb_data_home_dir to be defined.
Answer: A
NEW QUESTION 34
Examine this command, which executes successfully:
shell> mysqldump --master-data=2 --single-transaction --result-file=dump.sql mydb Which two statements are true? (Choose two.)
- A. This option uses the READ COMMITTED transaction isolation mode.
- B. It is a cold backup.
- C. The backup created is a consistent data dump.
- D. It enforces consistent backups for all storage engines.
- E. It executes flush tables with read lock.
Answer: A,E
NEW QUESTION 35
A user wants to connect without entering his or her username and password on the Linux command prompt.
Which three locations can be used to store the user's mysql credentials to satisfy this requirement? (Choose three.)
- A. $HOME/.mysql/auth/login file
- B. $HOME/.my.cnf file
- C. $HOME/.mylogin.cnf file
- D. DATADIR/mysqld-auto.cnf file
- E. $HOME/.mysqlrc file
- F. $MYSQL_HOME/my.cnf file
- G. /etc/my.cnf file
Answer: D,F,G
NEW QUESTION 36
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 37
Which two are features of MySQL Enterprise Firewall? (Choose two.)
- A. modifying SQL statement dynamically with substitutions
- B. provides stateless firewall access to TCP/3306
- C. automatic locking of user accounts who break your firewall
- D. blocking of potential threats by configuring pre-approved whitelists
- E. recording incoming SQL statement to facilitate the creation of a whitelist of permitted commands
Answer: A,D
NEW QUESTION 38
Examine this command, which executes successfully:
cluster.addInstance('<user>@<host>:<port>', {recoveryMethod: 'clone'})
Which three statements are true? (Choose three.)
- A. It is always slower than {recoveryMethod: 'incremental'}.
- B. The account used to perform this recovery needs the BACKUP_ADMIN privilege.
- C. A target instance must exist, then it will be provisioned with data from an instance already in the cluster and joined to the cluster.
- D. A new instance is installed, initialized, and provisioned with data from an instance already in the cluster and joined to the cluster.
- E. InnoDB tablespaces outside the datadir are able to be cloned.
- F. InnoDB redo logs must not rotate for the duration of the execution; otherwise, the recovery will fail.
Answer: A,B,F
NEW QUESTION 39
The data in this instance is transient; no backup or replication will be required. It is currently under performing.
The database size is static and including indexes is 19G.
Total system memory is 32G.
After profiling the system, you highlight these MySQL status and global variables:
The OS metrics indicate that disk is a bottleneck. Other variables retain their default values.
Which three changes will provide the most benefit to the instance? (Choose three.)
- A. innodb_log_file_size=1G
- B. innodb_flush_log_at_trx_commit=1
- C. sync_binlog=0
- D. innodb_undo_directory=/dev/shm
- E. max_connections=10000
- F. buffer_pool_size=24G
- G. innodb_doublewrite=0
Answer: A,B,E
NEW QUESTION 40
Binary log events for the ‘mydb1’ schema must be copied to a different schema name ‘mydb2’.
Which command will do this?
- A. mysqlbinlog --datebase=mydb1 --database=mydb2 | mysql
- B. mysqlbinlog --rewrite-db=’mydb1’ --rewrite-db=’mydb2’ | mysql
- C. mysqlbinlog --read-from-remote-server --raw | sed ‘s/mydb1/mydb2/g’ | mysql
- D. mysqlbinlog --rewrite-db=’mydb1->mydb2’ | mysql
Answer: C
NEW QUESTION 41
Examine this command, which executes successfully:
$ mysqlrouter --bootstrap user@hostname:port --directory=directory_path Which activity is performed?
- A. MySQL Router configures itself based on the information retrieved from the InnoDB cluster metadata server.
- B. MySQL Router is configured based on the information in files in directory_path.
- C. MySQL Router configures all the cluster nodes based on the information retrieved from the InnoDB cluster metadata server.
- D. MySQL Router is restarted.
Answer: A
NEW QUESTION 42
Examine this command, which executes successfully:
$ mysqlrouter --bootstrap user@hostname:port --directory=directory_path Which activity is performed?
- A. MySQL Router configures itself based on the information retrieved from the InnoDB cluster metadata server.
- B. MySQL Router is configured based on the information in files in directory_path.
- C. MySQL Router configures all the cluster nodes based on the information retrieved from the InnoDB cluster metadata server.
- D. MySQL Router is restarted.
Answer: A
Explanation:
Explanation/Reference: https://dev.mysql.com/doc/mysql-router/8.0/en/mysqlrouter.html
NEW QUESTION 43
Which statement is true about InnoDB persistent index statistics?
- A. Tables are scanned and index statistics recalculated when an instance is restarted.
- B. Setting innodb_stats_auto_recalc=ON causes statistics to be updated automatically when a new index is created.
- C. Index statistics are calculated from pages buffered in the buffer pool for tables with InnoDB storage engine.
- D. Increasing innodb_stats_persistent_sample_pages determines higher pages scanning speed, at the cost of increased memory usage.
- E. Execution plans based on transient index statistics improve precision when innodb_stats_persistent_sample_pages is increased.
- F. Updating index statistics is an I/O expensive operation.
Answer: E
NEW QUESTION 44
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 45
You wish to protect your MySQL database against SQL injection attacks.
Which method would fail to do this?
- A. using PREPARED STATEMENTS
- B. avoiding concatenation of SQL statements and user-supplied values in an application
- C. installing and configuring the Connection Control plugin
- D. using stored procedures for any database access
Answer: D
NEW QUESTION 46
You must configure the MySQL command-line client to provide the highest level of trust and security when connecting to a remote MySQL Server.
Which value of --ssl-mode will do this?
- A. VERIFY_CA
- B. PREFERRED
- C. VERIFY_IDENTITY
- D. REQUIRED
Answer: D
NEW QUESTION 47
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 48
You have a MySQL system with 500 GB of data that needs frequent backups.
You use a mix of MyISAM and InnoDB storage engines for your dat
a. Examine your backup requirement:
The MySQL system being backed up can never be unavailable or locked to the client applications.
The recovery from the backup must work on any system.
Only 1 hour of data can be lost on recovery of the backup.
Which option fulfills all backup requirements?
- A. Take a physical backup of the MySQL system.
- B. Take a logical backup of the MySQL system.
- C. Use the Clone Plugin to copy the data to another MySQL system.
- D. Take your backup from a slave of the MySQL system.
Answer: B
NEW QUESTION 49
You wish to protect your MySQL database against SQL injection attacks.
Which method would fail to do this?
- A. using PREPARED STATEMENTS
- B. avoiding concatenation of SQL statements and user-supplied values in an application
- C. installing and configuring the Connection Control plugin
- D. using stored procedures for any database access
Answer: D
Explanation:
Explanation/Reference: https://www.ptsecurity.com/ww-en/analytics/knowledge-base/how-to-prevent-sql-injection-attacks/
NEW QUESTION 50
Which four connection methods can MySQL clients specify with the --protocol option when connecting to a MySQL server? (Choose four.)
- A. IPv6
- B. SOCKET
- C. TCP
- D. MEMORY
- E. DIRECT
- F. PIPE
- G. IPv4
- H. FILE
Answer: B,C,D,F
NEW QUESTION 51
You are backing up raw InnoDB files by using mysqlbackup.
Which two groups of files will be backed up during a full backup? (Choose two.)
- A. *.sdifiles
- B. *.ibdfiles
- C. *.CSMfiles
- D. ib_logfile*files
- E. ibbackupfiles
Answer: B,D
Explanation:
Explanation/Reference:
Reference: https://dev.mysql.com/doc/mysql-backup-excerpt/5.7/en/innodb-backup.html
NEW QUESTION 52
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Oracle 1Z0-908: MySQL 8.0 Database Administrator Certification Path
The Oracle Certified Expert, Oracle 1Z0-908: MySQL 8.0 Database Administrator certification is for Database Development Systems Managers and Database Administrators with at least 1 year of RAC and Grid Infrastructure experience. It is also recommended to understand high availability concepts and clustering. To earn this certificate, you should have the ability to install, manage, monitor, and recover RAC databases, Clusterware, and ASM environments. You will get a complete understanding of the architecture of the Clusterware, ASM, and RAC databases while preparing for the exam with the help of 1Z0-908 practice test. After earning this certification, you will gain the skills of installing, setup, backup and recovery, tuning, and monitoring of these components.
The candidates should have to complete one of the following Certification or Training:
Oracle Database 12c Certified Professional
Oracle Database 11g Certified Professional
Oracle Certified Expert, Oracle Real Application Clusters 11g and Grid Infrastructure Administrator
Certifications:
Oracle Database 10g Real Applications Clusters Certified Expert
Oracle Database Administration 2019 Certified Professional
1Z0-908 practice exams are great sources for the preparation of the exam but they do not meet the requirement of the training. To meet the requirement of the training course must be offered by Oracle University Training Center, Oracle Authorized Education Center, Oracle Authorized Partner, or Oracle Workforce Development Program. Courses can be a live virtual class, training on demand, learning subscription, or instructor-led in-class.
Average Salary for Oracle 1Z0-908: MySQL 8.0 Database Exam Certified Professional
Oracle Database administrator roles are in great demand nowadays. The average salaries of Oracle 1Z0-908 Exam Certified professional in:
- United State - 94,000 USD
- England - 71,000 POUND
- Europe - 80,000 Euro
- India - 69,96,000 16,42,330 INR
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