1z1-908 Exam Dumps - Try Best 1z1-908 Exam Questions from Training Expert Test4Engine [Q29-Q52]

1z1-908 Exam Dumps - Try Best 1z1-908 Exam Questions from Training Expert Test4Engine

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NEW QUESTION 29
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 30
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. slow query log
• C. error log
• D. general query log
• E. audit log

Answer: A

 

NEW QUESTION 31
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 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 this statement and output:

You must try to reduce query execution time.
Which two queries should you focus on? (Choose two.)

• A. QN = 1
• B. QN = 5
• C. QN = 3
• D. QN = 4
• E. QN = 2

Answer: A,E

 

NEW QUESTION 34
Which command enables rule-based MySQL Auditing capabilities?

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

Answer: A

Explanation:
Explanation/Reference: https://dev.mysql.com/doc/mysql-security-excerpt/5.7/en/audit-log-filtering.html

 

NEW QUESTION 35
Which two queries are examples of successful SQL injection attacks? (Choose two.) SELECT user,passwd FROM members

• A. SELECT id, name FROM user WHERE id=23 OR id=32 OR 1=1;
• B. WHERE user = ‘?’;INSERT INTO members(‘user’,’passwd’) VALUES
  (‘[email protected]’,‘secret’);--‘;
• C. SELECT email,passwd FROM members
• D. SELECT id, name FROM user WHERE id=23 OR id=32 AND 1=1;
• E. SELECT id, name FROM user WHERE user.id=(SELECT members.id FROM members);
• F. WHERE email = ‘INSERT INTO members(‘email’,’passwd’) VALUES
  (‘[email protected]’, ‘secret’);--‘;
  SELECT user, phone FROM customers WHERE name = ‘\; DROP TABLE users; --‘;

Answer: C,D

 

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. You use the InnoDB storage engine and statements wait while data is inserted.
• B. The Innodb Buffer pool is full.
• C. You use the MyISAM storage engine for most common tables.
• D. Your table accesses wait for the operating system level flush.

Answer: A

 

NEW QUESTION 37
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 38
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 39
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 40
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. Create the backup by using the --set-gtid-purged=OFF option.
• B. Remove the @@GLOBAL.gtid_purged statement from the dump file.
• C. Stop all instances except the primary read/write master instance and run the restore.
• D. Remove the group replication plugin from each instance before restoring.
• E. Remove the @@GLOBAL.gtid_executed statement from the dump file.
• F. Restore using the --set-gtid-purged=OFF option.

Answer: A,B

 

NEW QUESTION 41
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 data.
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 42
A valid raw backup of the shop.customers MyISAM table was taken.
You must restore the table. You begin with these steps:
1. Confirm that secure_file_priv='/var/tmp'
2. mysql> DROP TABLE shop.customers;
3. shell> cp /backup/customers.MY* /var/lib/mysql/shop/
Which two actions are required to complete the restore? (Choose two.)

• A. shell> cp /backup/customers.sdi /var/lib/mysql/shop/
• B. shell> cp /backup/customers.sdi /var/tmp
• C. mysql> IMPORT TABLE FROM /var/tmp/customers.sdi
• D. mysql> IMPORT TABLE FROM /var/lib/mysql/shop/customers.sdi
• E. shell> cp /backup/customers.frm /var/lib/mysql/shop/
• F. mysql> ALTER TABLE shop.customers DISCARD TABLESPACE
• G. mysql> SOURCE '/var/tmp/customers.sdi'
• H. mysql> ALTER TABLE shop.customers IMPORT TABLESPACE

Answer: C,H

 

NEW QUESTION 43
Which statement is true about MySQL Enterprise Transparent Data Encryption (TDE)?

• A. Both MyISAM and InnoDB tables can be encrypted by setting the keyring_engine = ALL variable in the MySQL configuration file.
• B. TDE can encrypt InnoDB and MyISAM tables only when the tables are stored in the SYSTEM tablespace.
• C. MySQL TDE uses an appropriate keyring plugin to store the keys in a centralized location.
• D. Lost tablespace encryption keys can be regenerated only if the master database key is known or present in the Key Vault specification.

Answer: D

 

NEW QUESTION 44
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 45
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 only the users database.
• D. It creates a logical backup of all metadata, but contains no table data.

Answer: D

 

NEW QUESTION 46
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. ibbackup files
• B. *.sdi files
• C. *.ibd files
• D. ib_logfile* files
• E. *.CSM files

Answer: C,D

 

NEW QUESTION 47
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 48
Which two statements are true about using MySQL Enterprise Monitor Query Analyzer? (Choose two.)

• A. It is possible to import data into the Query Analyzer from heterogeneous sources, such as CSV.
• B. It is possible to list and analyze statements in an arbitrary graph range selection from timeseries graphs.
• C. It is possible to configure the Query Analysis built-in advisor to get notified about slow query execution.
• D. It is possible to retrieve a normalized statement, but never the exact statement that was executed.
• E. The single query QRTi pie chart in the Query Analyzer view is based on the average execution of all statements.

Answer: B,C

 

NEW QUESTION 49
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. Run MySQL Server docker containers.
• C. Use systemd with different settings for each instance.
• D. Use resource groups to lock different instances on separate CPUs.
• E. Run mysqld with --datadir defined for each instance.
• F. Use system tools to lock each instance to its own CPU.

Answer: A,C,E

 

NEW QUESTION 50
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 IDENTIFIED WITH mysql_no_login;
• B. ALTER USER baduser@hostname MAX_USER_CONNECTIONS 0;
• C. ALTER USER baduser@hostname DEFAULT ROLE NONE;
• D. ALTER USER baduser@hostname PASSWORD DISABLED;
• E. ALTER USER baduser@hostname ACCOUNT LOCK;

Answer: A,E

 

NEW QUESTION 51
You have just installed MySQL on Oracle Linux and adjusted your /etc/my.cnfparameters to suit your installation.
Examine the output:

What statement is true about the start attempt?

• A. systemdattempted to start mysqld, found another systemd mysqldprocess running, and shut it down.
• B. systemdwaited for 30 seconds before timing out and start up failed.
• C. MySQL server continued to start up even though another process existed.
• D. MySQL server was not started due to a problem while executing process 2732.
• E. systemd found the mysqldservice disabled and failed to start it.

Answer: A

 

NEW QUESTION 52
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Topics of Oracle 1Z0-908: MySQL 8.0 Database Exam

The Oracle 1Z0-908 exam tests the abilities and knowledge of the candidates by checking the following objectives:

Architecture

• Understand and use the Data Dictionary
• Understand how MySQL stores data
• Configure buffers and caches
• Understand how InnoDB stores data and logs
• Configure client connections to the server

Server Installation and Configuration

• Start and stop MySQL
• Install and use the MySQL server and client programs
• Configure MySQL by using options and option files
• Upgrade MySQL
• Identify the files and folders created during the installation
• Launch multiple MySQL servers on the same host
• Configure MySQL variables

Security

• Prevent SQL injection attacks
• Use authentication plug-ins
• Secure the MySQL host environment
• Create user accounts and roles
• Recognize common security risks
• Provide the password and login security
• Encrypt MySQL data
• Control user and role permissions
• Secure MySQL server connections
• Configure MySQL Enterprise Firewall

Monitoring and Maintenance

• Monitor database growth and explain capacity planning
• Use MySQL Enterprise Monitor to view activity in MySQL
• Troubleshoot problems with locked resources
• Configure and view MySQL log files
• Monitor MySQL processes and status
• Configure MySQL Enterprise Audit

Query Optimization

• Create indexes to improve server performance
• Analyze queries with MySQL Enterprise Monitor
• Examine how MySQL optimizes queries
• Monitor and understand index statistics

Backups and Recovery

• Backup and restore data with MySQL Enterprise Backup
• Implement a backup strategy
• Explain when and how to use raw file backups
• Back up the binary log
• Distinguish between the different types of backup
• Use mysqldump and mysqlpump to perform logical backups

High Availability Techniques

• Monitor and troubleshoot replication
• Describe MySQL InnoDB Cluster and Group Replication
• Configure replication
• Explain the role of the binary log in replication
• Configure multisource replication
• Explain the role of replication threads
• Explain how replication provides high availability and scalability
• Perform an InnoDB cluster recovery
• Configure a MySQL InnoDB cluster

 

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