Free 1z1-908 pdf Files With Updated and Accurate Dumps Training [Q74-Q98]

Free 1z1-908 pdf Files With Updated and Accurate Dumps Training

Top-Class 1z1-908 Question Answers Study Guide

Oracle 1z1-908 exam is an essential certification for MySQL database administrators who want to validate their skills and knowledge in managing and securing MySQL databases. 1z1-908 exam covers a range of topics related to MySQL database administration, including the latest features and enhancements introduced in MySQL 8.0. Passing the exam can help you stand out in a competitive job market and open up new career opportunities.

Preparing for the Oracle 1z1-908 certification exam requires a solid understanding of MySQL database administration concepts, principles, and best practices. Candidates can take advantage of various resources such as official Oracle training courses, study guides, practice exams, and online forums to enhance their knowledge and skills. With the right preparation, candidates can pass the exam and become certified MySQL 8.0 database administrators.

 

NEW QUESTION # 74
You have an InnoDB Cluster configured with three servers.
Examine this command, which executes successfully:
mysqldump -uroot -p -d mydatabase > mydatabase_backup.sql
Due to data loss, the cluster is initialized and a restore is attempted resulting in this error:
ERROR 13176 (HY000) at line 23: Cannot update GTID_PURGED with the Group Replication plugin running Which two actions, either one of which, can fix this error and allow a successful restore of the cluster?
(Choose two.)

• A. Remove the @@GLOBAL.gtid_executed statement from the dump file.
• B. Remove the group replication plugin from each instance before restoring.
• C. Remove the @@GLOBAL.gtid_purged statement from the dump file.
• D. Restore using the --set-gtid-purged=OFF option.
• E. Stop all instances except the primary read/write master instance and run the restore.
• F. Create the backup by using the --set-gtid-purged=OFF option.

Answer: C,F

NEW QUESTION # 75
Which three are types of InnoDB tablespaces? (Choose three.)

• A. redo tablespaces
• B. schema tablespaces
• C. encryption tablespaces
• D. undo tablespaces
• E. data tablespaces
• F. temporary table tablespaces

Answer: C,E,F

NEW QUESTION # 76
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. The backup created is a consistent data dump.
• B. It executes flush tables with read lock.
• C. It is a cold backup.
• D. This option uses the READ COMMITTED transaction isolation mode.
• E. It enforces consistent backups for all storage engines.

Answer: B,D

NEW QUESTION # 77
You must run multiple instances of MySQL Server on a single host.
Which three methods are supported? (Choose three.)

• A. Start mysqld or mysqld_safe using different option files for each instance.
• B. Use system tools to lock each instance to its own CPU.
• C. Run mysqld with --datadir defined for each instance.
• D. Use resource groups to lock different instances on separate CPUs.
• E. Use systemd with different settings for each instance.
• F. Run MySQL Server docker containers.

Answer: A,C,E

NEW QUESTION # 78
You execute this command:
shell> mysqlpump --exclude-databases=% --users
Which statement is true?

• A. It returns an error because the mysqldump command should have been used.
• B. It creates a logical backup of all MySQL user accounts.
• C. It creates a logical backup of all metadata, but contains no table data.
• D. It creates a logical backup of only the users database.

Answer: B

Explanation:
Explanation
the command mysqlpump --exclude-databases=% --users creates a logical backup of all MySQL user accounts as CREATE USER and GRANT statements2. The option --exclude-databases=% excludes all databases from the backup, while the option --users includes all user accounts1.

NEW QUESTION # 79
Which two statements are true about MySQL server multi-source replication? (Choose two.)

• A. It is not compatible with auto-positioning.
• B. It must use GTID replication.
• C. It relies on relay_log_recovery for resilient operations.
• D. It needs to be re-instanced after a crash to maintain consistency.
• E. It does not attempt to detect or resolve replication conflicts.
• F. It uses only time-based replication conflict resolution.

Answer: B,F

NEW QUESTION # 80
Examine this command, which executes successfully:
mysqlpump --user=root --password > full_backup.sql
Which two databases will be excluded from this dump? (Choose two.)

• A. sys
• B. employee
• C. mysql
• D. information_schema
• E. world

Answer: A,D

NEW QUESTION # 81
Examine this list of MySQL data directory binary logs:
binlog.000001 binlog.000002
.....
binlog.000289
binlog.000300
binlog.000301
binlog.index
Now examine this command, which executes successfully:
mysqldump --delete-master-logs --all-databases > /backup/db_backup.sql
Which two are true? (Choose two.)

• A. All binary logs are deleted from the master.
• B. All details regarding deleted logs and master metadata are captured in the output file.
• C. All databases, excluding master metadata, are backed up to the output file.
• D. All binary logs are backed up and then deleted.
• E. All non-active binary logs are removed from the master.
• F. All databases are backed up to the output file.

Answer: A,C

NEW QUESTION # 82
Examine this command, which executes successfully:
cluster.addInstance('<user>@<host>:<port>', {recoveryMethod: 'clone'})
Which three statements are true? (Choose three.)

• A. InnoDB redo logs must not rotate for the duration of the execution; otherwise, the recovery will fail.
• B. A target instance must exist, then it will be provisioned with data from an instance already in the cluster and joined to the cluster.
• C. It is always slower than {recoveryMethod: 'incremental'}.
• D. The account used to perform this recovery needs the BACKUP_ADMIN privilege.
• E. InnoDB tablespaces outside the datadir are able to be cloned.
• F. A new instance is installed, initialized, and provisioned with data from an instance already in the cluster and joined to the cluster.

Answer: A,C,D

NEW QUESTION # 83
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. sync_binlog=0
• B. innodb_log_file_size=1G
• C. buffer_pool_size=24G
• D. innodb_doublewrite=0
• E. innodb_undo_directory=/dev/shm
• F. innodb_flush_log_at_trx_commit=1
• G. max_connections=10000

Answer: B,F,G

Explanation:
Explanation/Reference: https://aws.amazon.com/blogs/database/best-practices-for-configuring-parameters-for-amazon- rds-for-mysql-part-1-parameters-related-to-performance/

NEW QUESTION # 84
Which command enables rule-based MySQL Auditing capabilities?

• A. mysql> INSTALL COMPONENT audit_log;
• B. mysql> INSTALL PLUGIN audit_log;
• C. shell> mysqld --initialize --log-raw=audit.log
• D. shell> mysql < audit_log_filter_linux_install.sql

Answer: D

NEW QUESTION # 85
Which two methods allow a DBA to reset a user's password? (Choose two.)

• A. GRANT statement
• B. SET PASSWORD statement
• C. ALTER USER statement
• D. mysql_secure_installation utility
• E. mysqladmin client program

Answer: B,C

NEW QUESTION # 86
User account baduser@hostname on your MySQL instance has been compromised.
Which two commands stop any new connections using the compromised account? (Choose two.)

• A. ALTER USER baduser@hostname DEFAULT ROLE NONE;
• B. ALTER USER baduser@hostname ACCOUNT LOCK;
• C. ALTER USER baduser@hostname PASSWORD DISABLED;
• D. ALTER USER baduser@hostname MAX_USER_CONNECTIONS 0;
• E. ALTER USER baduser@hostname IDENTIFIED WITH mysql_no_login;

Answer: B,E

NEW QUESTION # 87
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 DBA needs to execute FLUSH PRIVILEGES.
• D. The statement was blocked by MySQL Firewall.

Answer: A

NEW QUESTION # 88
You have a MySQL client installed on your Linux workstation with a default installation. You have your admin login credentials to connect to a MySQL server running Microsoft Windows on remote host
192.0.2.1:3306. You wish to connect directly to the world database.
Which four options need to be specified to complete this task with a single command? (Choose four.)

• A. --shared-memory-base-name=world
• B. --password
• C. --socket=/tmp/mysql.sock
• D. --protocol=UDP
• E. --port=3306
• F. --database=world
• G. --host=192.0.2.1
• H. --user=admin
• I. --protocol=pipe

Answer: A,B,G,I

NEW QUESTION # 89
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 a shared lock.
• D. The lock is an exclusive lock.
• E. The lock is an intentional lock.
• F. The lock is at the metadata object level.

Answer: A,D

NEW QUESTION # 90
You have configured GTID-based asynchronous replication with one master and one slave.
A user accidentally updated some data on the slave.
To fix this, you stopped replication and successfully reverted the accidental changes. Examine the current GTID information:

You must fix GTID sets on the slave to avoid replicating unwanted transactions in case of failover. Which set of actions would allow the slave to continue replicating without erroneous transactions?

• A. RESET SLAVE;
  SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
• B. RESET SLAVE;
  SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-3820;
  SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10300;
• C. RESET MASTER;
  SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
• D. SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-2312,bbbbbbbb- bbbb-bbbb-bbbb-bbbbbbbbbbbb:1-9; SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
• E. RESET MASTER;
  SET GLOBAL gtid_purged-aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-2312;
  SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;

Answer: E

NEW QUESTION # 91
Which two statements are true about MySQL Enterprise Backup? (Choose two.)

• A. It supports restoring to a remote MySQL system.
• B. It supports backing up only table structures.
• C. It supports backup of a remote MySQL system.
• D. It creates logical backups.
• E. It can perform hot or warm backups.
• F. It supports the creation of incremental backups.

Answer: E,F

NEW QUESTION # 92
t is a non-empty InnoDB table.
Examine these statements, which are executed in one session:
BEGIN;
SELECT * FROM t FOR UPDATE;
Which is true?

• A. mysqlcheck --analyze --all-databases will execute normally on all tables and return a report.
• B. If OPTIMIZE TABLE; is invoked, it will create a table lock on t and force a transaction rollback.
• C. If OPTIMIZE LOCAL TABLE t; is invoked from another session, it executes normally and returns the status.
• D. If ANALYZE TABLE; is invoked from the same session, it hangs until the transaction is committed or rolled back.

Answer: C

NEW QUESTION # 93
A MySQL server is monitored using MySQL Enterprise Monitor's agentless installation.
Which three features are available with this installation method? (Choose three.)

• A. security-related advisor warnings
• B. MySQL Query Analysis data
• C. disk usage and disk characteristics including disk advisors warnings
• D. CPU utilization
• E. network-related information and network characteristics
• F. operating system memory utilization
• G. MySQL Replication monitoring

Answer: A,B,C

NEW QUESTION # 94
You are having performance issues with MySQL instances. Those servers are monitored with MySQL Enterprise Monitor.
Using Query Analyzer, where do you begin to look for problem queries?

• A. Sort the "Exec" column and check for SQL queries with low Query Response Time index (QRTi) values.
• B. Sort the "Exec" column and check for SQL queries with high Query Response Time index (QRTi) values.
• C. Look for queries with low total latency times in the Latency section in the times series graph.
• D. Look for queries with big prolonged spikes in row activity/access graph in the times series graph.

Answer: D

NEW QUESTION # 95
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 metadata. Please use the most up to date instance: 'host1:3377'.
(RuntimeError)
Which statement is true?

• A. The instance deployed on host3 must be synchronized from a donor deployed on host1 by using the command cluster.addInstance('host1:3377').
• B. The cluster is running and there is at least one ONLINE instance.
• 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: A

NEW QUESTION # 96
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. Users could overwrite configuration files.
• B. Extra startup time would be required for the MySQL server to reset the privileges.
• C. Data files could be deleted.
• D. MySQL binaries could be damaged, deleted, or altered.
• E. SQL injections could be used to insert bad data into the database.

Answer: B,C

NEW QUESTION # 97
You plan to take daily full backups, which include the ndbinfo and sys (internal) databases.
Which command will back up the databases in parallel?

• A. mysqldump --all-databases > full_backup-$(date +%Y%m%d).sql
• B. mysqldump --single-transaction > full-backup-$(date +%Y%m%d).sql
• C. mysqlpump --include-databases=% > full-backup-$(date +%Y%m$d).sql
• D. mysqlpump --all-databases > full-backup-$(date +%Y%m%d).sql

Answer: A

NEW QUESTION # 98
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