Ultimate Guide to Prepare 1Z0-908 with Accurate PDF Questions [Nov 12, 2021]
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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.
Benefits in Obtaining Oracle 1Z0-908: MySQL 8.0 Database Exam Certification
Oracle 1Z0-908 Certification will strengthen your knowledge and skills by introducing you to a wide variety of important database features, functions, and tasks. Oracle Database certification trains you on how to perform complex, hands-on activities through study, labs, and practice. This certification will help you gain a better understanding and experience with Oracle RAC and Grid Infrastructure. After gaining this certification you will be able to install, maintain, tune, and recover RAC databases, Clusterware, and ASM environments. if you are unsure that which is the correct option, mark the most suitable option as your answer so that any question should not be left unanswered in 1Z0-908 dumps pdf.
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NEW QUESTION 25
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 needs to reconnect to the database.
- B. The DBA needs to execute FLUSH PRIVILEGES.
- C. The statement was blocked by MySQL Firewall.
- D. John has not activated the role.
Answer: D
NEW QUESTION 26
Examine this query and output:
Which two statements are true? (Choose two.)
- A. The optimizer estimates that 51 rows in the country table have Continent = 'Asia'.
- B. It takes more than 8 milliseconds to sort the rows.
- C. The query returns exactly 125 rows.
- D. The country table is accessed as the first table, and then joined to the city table.
- E. 35 rows from the city table are included in the result.
Answer: A,E
NEW QUESTION 27
Examine these entries from the general query log:
All UPDATE statements reference existing rows.
Which describes the outcome of the sequence of statements?
- A. Connection 24 experiences a lock wait timeout.
- B. Connection 25 experiences a lock wait timeout.
- C. A deadlock occurs after innodb_lock_wait_timeout seconds.
- D. All statements execute without error.
- E. A deadlock occurs immediately.
Answer: C
NEW QUESTION 28
You made some table definition changes to a schema in your MySQL Server.
Which two statements reflect how MySQL Server handles the table definition changes? (Choose two.)
- A. MySQL implicitly executes FLUSH TABLES and stores a snapshot backup of the metadata.
- B. MySQL writes SDI to the binary log for distributed backups.
- C. The metadata is serialized in JSON format in Serialized Dictionary Information (SDI).
- D. MySQL keeps InnoDB metadata changes in .sdi files in datadir.
- E. MySQL Server stores a copy of the serialized data in the InnoDB user tablespace.
Answer: C,E
NEW QUESTION 29
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. ibbackupfiles
- B. *.ibdfiles
- C. *.sdifiles
- D. *.CSMfiles
- E. ib_logfile*files
Answer: B,E
Explanation:
Explanation/Reference:
Reference: https://dev.mysql.com/doc/mysql-backup-excerpt/5.7/en/innodb-backup.html
NEW QUESTION 30
Examine this query and output:
Which two statements are true? (Choose two.)
- A. It takes more than 8 milliseconds to sort the rows.
- B. The query returns exactly 125 rows.
- C. The countrytable is accessed as the first table, and then joined to the city table.
- D. The optimizer estimates that 51 rows in the countrytable have Continent = ‘Asia’.
- E. 35 rows from the city table are included in the result.
Answer: D,E
NEW QUESTION 31
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 fail because the slave has purged more aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa transactions than the master.
- B. Replication will fail because of inconsistent numbers in cccccccc-cccc-cccc-cccc-cccccccccccc GTIDs.
- C. Replication will fail because the master has already purged transactions with cccccccc-cccc-cccc- cccc-ccccccccccccGTIDs.
- D. Replication will fail because the master does not have the required transaction with bbbbbbbb-bbbb- bbbb-bbbb-bbbbbbbbbbbbGTIDs in its binary logs.
- E. Replication will work.
Answer: A
Explanation:
Explanation/Reference: https://bugs.mysql.com/bug.php?id=86643
NEW QUESTION 32
Which three are characteristics of a newly created role? (Choose three.)
- A. It can be protected with a password.
- B. It can be dropped using the DROP ROLEstatement.
- C. It can be granted to user accounts.
- D. It is created as a locked account.
- E. It can be renamed using the RENAME ROLEstatement.
- F. It is stored in the mysql.roletable.
Answer: A,B,C
Explanation:
Explanation/Reference:
NEW QUESTION 33
Examine this command and output:
Which two options will improve the security of the MySQL instance? (Choose two.)
- A. Change the parent directory owner and group to mysql.
- B. Remove world read privileges from the server-cert.pem certificate file.
- C. Change the group ownership of the mysql directory to the mysql user group.
- D. Remove world read privileges from the public_key.pem file.
- E. Remove group read/write privileges from the private_key.pem file.
- F. Remove the world read/execute privilege from the accounting directory.
Answer: A,C
NEW QUESTION 34
Which three statements are true about MySQL replication? (Choose three.)
- A. Any instance can have multiple slaves, but it can have only one master.
- B. Each slave must have its own MySQL user for replication.
- C. Binary logs contain only transactions originating from a single MySQL instance.
- D. Each instance in a replication topology must have a unique server ID.
- E. Replication can use only TCP/IP connections.
- F. A replication user must have the SELECT privilege for all tables that need to be replicated.
- G. Binary logging must be enabled on the master in order to replicate to other instances.
Answer: D,F,G
NEW QUESTION 35
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. systemd attempted to start mysqld, found another systemd mysqld process running, and shut it down.
- B. MySQL server continued to start up even though another process existed.
- C. systemd waited for 30 seconds before timing out and start up failed.
- D. MySQL server was not started due to a problem while executing process 2732.
- E. systemd found the mysqld service disabled and failed to start it.
Answer: A
NEW QUESTION 36
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. The Innodb Buffer pool is full.
- B. You use the MyISAM storage engine for most common tables.
- C. Your table accesses wait for the operating system level flush.
- D. You use the InnoDB storage engine and statements wait while data is inserted.
Answer: D
NEW QUESTION 37
You want to log only the changes made to the database objects and data on the MySQL system.
Which log will do this by default?
- A. binary log
- B. general query log
- C. slow query log
- D. audit log
- E. error log
Answer: A
NEW QUESTION 38
Examine the modified output:
Seconds_Behind_ Master value is steadily growing. What are two possible causes? (Choose two.)
- A. This value shows only I/O latency and is not indicative of the size of the transaction queue.
- B. The master is producing a large volume of events in parallel but the slave is processing them serially.
- C. One or more large tables do not have primary keys.
- D. The parallel slave threads are experiencing lock contention.
- E. The master is most probably too busy to transmit data and the slave needs to wait for more data.
Answer: A,B
NEW QUESTION 39
Examine this SQL statement:
mysql> GRANT r_read@localhost TO mark WITH ADMIN OPTION;
Which two are true? (Choose two.)
- A. ADMIN OPTION allows Mark to drop the role.
- B. Mark must connect from localhost to activate the r_read@localhost role.
- C. Mark can grant the privileges assigned to the r_read@localhost role to another user.
- D. Mark can revoke the r_read@localhost role from another role.
- E. ADMIN OPTION causes the role to be activated by default.
- F. Mark can grant the r_read@localhost role to another user.
Answer: A,C
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 --rewrite-db=’mydb1->mydb2’ | mysql
- B. mysqlbinlog --read-from-remote-server --raw | sed ‘s/mydb1/mydb2/g’ | mysql
- C. mysqlbinlog --rewrite-db=’mydb1’ --rewrite-db=’mydb2’ | mysql
- D. mysqlbinlog --datebase=mydb1 --database=mydb2 | mysql
Answer: B
NEW QUESTION 41
An attempt to recover an InnoDB Cluster fails.
Examine this set of messages and responses:
host3:3377 ssl JS > dba.rebootClusterFromCompleteOutage() Reconfiguring the default cluster from complete outage...
The instance 'host1:3377'' was part of the cluster configuration. Would you like to rejoin it to the cluster? [y/N]: y The instance 'host2:3377' was part of the cluster configuration. Would you like to rejoin it to the cluster? [y/N]: y Dba.rebootClusterFromCompleteOutage: The active session instance isn't the most updated in comparison with the ONLINE instances of the Cluster's metadat a. Please use the most up to date instance: 'host1:3377'. (RuntimeError) Which statement is true?
- A. The cluster is running and there is at least one ONLINE instance.
- B. The instance deployed on host3 must be synchronized from a donor deployed on host1 by using the command cluster.addInstance('host1:3377').
- C. It is possible to determine the most up-to-date instance by comparing different global transaction identifier (GTID) sets with GTID_SUBSET(set1,set2).
- D. The instance deployed on host3 must be rebuilt with a backup from the primary instance.
- E. The active session instance is invalid and must be re-created by using the command shell.connect ('host3:3377').
Answer: B
NEW QUESTION 42
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