Latest 1Z0-908 Pass Guaranteed Exam Dumps with Accurate & Updated Questions
1Z0-908 Exam Brain Dumps - Study Notes and Theory
Oracle 1Z0-908 certification exam is designed for those individuals who want to become a MySQL 8.0 Database Administrator. 1Z0-908 exam is a must for anyone who wants to learn and master the skills required to manage and optimize MySQL databases. The 1Z0-908 exam is designed to test the skills and knowledge of candidates in various areas related to MySQL database administration.
Oracle 1Z0-908 exam is a rigorous and challenging test of a candidate's knowledge and skills in MySQL 8.0 Database Administration. However, with the right preparation and study materials, candidates can feel confident and well-prepared to pass the exam and earn their certification.
NEW QUESTION # 46
The mysqld instance has the connection control plugin enabled with these settings:
connection_control_min_connection_delay=1000 connection_control_max_connection_delay=2000 The minimum and maximum delays need to be increased to 3000 and 5000, respectively.
A command is executed:
mysql> SET GLOBAL connection_control_min_connection_delay=3000;
What is the result?
- A. The minimum connection value is changed to 2000.
- B. Only the minimum connection value is increased to 3000.
- C. The minimum value increases to 3000 and the maximum value increases to 4000.
- D. An error is returned.
Answer: B
NEW QUESTION # 47
Which statement is true about cold backups?
- A. They are good to use when many users are online accessing the database.
- B. They are backups taken from snapshots of a running database.
- C. They are backups taken from OS copy commands.
- D. They are good to use if only data structures must be backed up but not log files.
Answer: B
NEW QUESTION # 48
Examine this statement and output:
You must try to reduce query execution time.
Which two queries should you focus on? (Choose two.)
- A. QN = 5
- B. QN = 4
- C. QN = 3
- D. QN = 2
- E. QN = 1
Answer: D,E
NEW QUESTION # 49
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 country table is accessed as the first table, and then joined to the city table.
- D. The optimizer estimates that 51 rows in the country table have Continent = 'Asia'.
- E. 35 rows from the city table are included in the result.
Answer: D,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 ACCOUNT LOCK;
- 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 IDENTIFIED WITH mysql_no_login;
Answer: A,E
NEW QUESTION # 51
Which statement is true about InnoDB persistent index statistics?
- A. Increasing innodb_stats_persistent_sample_pages determines higher pages scanning speed, at the cost of increased memory usage.
- B. Index statistics are calculated from pages buffered in the buffer pool for tables with InnoDB storage engine.
- C. Execution plans based on transient index statistics improve precision when innodb_stats_persistent_sample_pages is increased.
- D. Setting innodb_stats_auto_recalc=ON causes statistics to be updated automatically when a new index is created.
- E. Updating index statistics is an I/O expensive operation.
Answer: E
NEW QUESTION # 52
Examine this statement, which executes successfully:
You want to improve the performance of this query:
Which change enables the query to succeed while accessing fewer rows?
- A. ALTER TABLE world.city ADD FULLTEXT INDEX (Name);
- B. ALTER TABLE world.city ADD SPATIAL INDEX (Population);
- C. ALTER TABLE world.city ADD FULLTEXT INDEX (Population);
- D. ALTER TABLE world.city ADD INDEX (Population);
- E. ALTER TABLE world.city ADD SPATIAL INDEX (Name);
- F. ALTER TABLE world.city ADD INDEX (Name);
Answer: B
Explanation:
Explanation/Reference: https://dev.mysql.com/doc/refman/5.7/en/creating-spatial-indexes.html
NEW QUESTION # 53
Examine this command, which executes successfully:
cluster.addInstance('<user>@<host>:<port>', {recoveryMethod: 'clone'})
Which three statements are true? (Choose three.)
- A. InnoDB tablespaces outside the datadir are able to be cloned.
- B. A new instance is installed, initialized, and provisioned with data from an instance already in the cluster and joined to the cluster.
- C. The account used to perform this recovery needs the BACKUP_ADMIN privilege.
- D. A target instance must exist, then it will be provisioned with data from an instance already in the cluster and joined to the cluster.
- E. It is always slower than {recoveryMethod: 'incremental'}.
- F. InnoDB redo logs must not rotate for the duration of the execution; otherwise, the recovery will fail.
Answer: C,E,F
NEW QUESTION # 54
Examine this parameter setting:
audit_log=FORCE_LOG_PERMANENT
What effect does this have on auditing?
- A. It will force the load of the audit plugin even in case of errors at server start.
- B. It prevents the audit plugin from being removed from the running server.
- C. It causes the audit log to be created if it does not exist.
- D. It prevents the audit log from being removed or rotated.
Answer: B
NEW QUESTION # 55
You want to dump all databases with names that start with "db".
Which command will achieve this?
- A. mysqlpump --include-databases=db --result-file=all_db_backup.sql
- B. mysqlpump > all_db_backup.sql
- C. mysqlpump --include-databases=db% --result-file=all_db_backup.sql
- D. mysqlpump --include-tables=db.% --result-file=all_db_backup.sql
Answer: A
NEW QUESTION # 56
You are using an existing server with a new configuration. MySQL Server fails to start.
Examine this snapshot of the error log:
Which action would allow the server to start?
- A. First run mysqld --initialize to refresh the Size of ib_logfile.
- B. Execute mysqladmin flush-logs.
- C. Remove ib_logfile0 and ib_logfile1 files from the file system.
- D. Create a new ib_logfile0 file of size 26214400.
Answer: A
NEW QUESTION # 57
You execute this command:
shell> mysqlpump --exclude-databases=% --users
Which statement is true?
- A. It creates a logical backup of all metadata, but contains no table data.
- B. It creates a logical backup of only the users database.
- C. It returns an error because the mysqldump command should have been used.
- D. It creates a logical backup of all MySQL user accounts.
Answer: A
NEW QUESTION # 58
Examine this snippet from the binary log file named binlog.000036:
The rental table was accidentally dropped, and you must recover the table.
You have restored the last backup, which corresponds to the start of the binlog.000036 binary log.
Which command will complete the recovery?
- A. mysqlbinlog --stop-datetime='2019-ll-20 14:55:16' binlog.000036 | mysql
- B. mysqlbinlog --stop-position=500324 binlog.000036 | mysql
- C. mysqlbinlog --stop-datetime='2019-ll-20 14:55:18' binlog.000036 | mysql
- D. mysqlbinlog --stop-position=5004S3 binlog.000036 | mysql
Answer: A
NEW QUESTION # 59
Examine these statements and output:
Which statement is true?
- A. The user is authorized as the rsmith@localhost user.
- B. The user failed to define a username and the connecting username defaulted to ''@'%'.
- C. The user is authorized as the accounting@localhost user.
- D. The user is authenticated as the anonymous proxy user ''@'%'.
- E. The user is logged in with --user=accounting as an option.
Answer: A
NEW QUESTION # 60
Which step or set of steps can be used to rotate the error log?
- A. Execute SET GLOBAL max_error_count = <number of messages at point to rotate>.
- B. Execute SET GLOBAL expire_logs_days=0to enforce a log rotation.
- C. Rename the error log file on disk, and then execute FLUSH ERROR LOGS.
- D. Execute SET GLOBAL log_error = ‘<new error log file>’.
Answer: C
Explanation:
Explanation/Reference: https://blog.pythian.com/mysql-log-rotation/
NEW QUESTION # 61
Examine this command and output:
Which two statements are true? (Choose two.)
- A. The lock is at the metadata object level.
- B. The lock is at the table object level.
- C. The lock is an intentional lock.
- D. The lock is an exclusive lock.
- E. The lock is a shared lock.
- F. The lock is a row-level lock.
Answer: B,D
NEW QUESTION # 62
Which condition is true about the use of the hash join algorithm?
- A. The smallest of the tables in the join must fit in memory as set by join_buffer_size.
- B. No index can be used for the join.
- C. The query must access no more than two tables.
- D. At least one of the tables in the join must have a hash index.
Answer: C
NEW QUESTION # 63
A MySQL server is monitored using MySQL Enterprise Monitor's agentless installation.
Which three features are available with this installation method? (Choose three.)
- A. disk usage and disk characteristics including disk advisors warnings
- B. MySQL Replication monitoring
- C. security-related advisor warnings
- D. network-related information and network characteristics
- E. MySQL Query Analysis data
- F. CPU utilization
- G. operating system memory utilization
Answer: A,C,E
NEW QUESTION # 64
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 contain events that describe database changes on the master.
- C. They are pulled from the master to the slave.
- D. They contain events that describe all queries run on the master.
- E. They are pushed from the master to the slave.
Answer: B,E
NEW QUESTION # 65
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 # 66
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