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1z0-908 Exam Dumps : MySQL 8.0 Database Administrator

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MySQL 8.0 Database Administrator Questions and Answers

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Question 1

Which two are true about differences between logical and physical upgrades of MySQL databases? (Choose two.)

Options:

A.

Post-upgrade table storage requirements after logical upgrades are usually smaller than that after physical upgrades.

B.

Physical upgrades are performed for current instances on bare metal deployments, whereas logical upgrades are used for virtual machines or containerized instances.

C.

Logical upgrades are much faster because they do not require restarting the mysqld process.

D.

Post-upgrade table storage requirements after physical upgrades are usually smaller than that after logical upgrades.

E.

Physical upgrades are much faster because they do not require restarting the mysqld process.

F.

Physical upgrades leave data in place, whereas logical upgrades require data to be restored from mysqldump-type backups taken before the upgrades.

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Question 2

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.)

Options:

A.

innodb_flush_log_at_trx_commit=1

B.

buffer_pool_size=24G

C.

innodb_log_file_size=1G

D.

sync_binlog=0

E.

innodb_doublewrite=0

F.

max_connections=10000

G.

innodb_undo_directory=/dev/shm

Question 3

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

Options:

A.

ALTER USER statement

B.

mysql_secure_installation utility

C.

SET PASSWORD statement

D.

mysqladmin client program

E.

GRANT statement

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