Free Access Oracle.1Z0-908.v2022-04-08.q45 Practice Test (Page 6)

Question 21

Which two are characteristics of snapshot-based backups? (Choose two.)

A.The frozen file system can be cloned to another virtual machine immediately into active service.

B.Snapshot-based backups greatly reduce time during which the database and applications are unavailable.

C.Snapshot backups can be used only in virtual machines.

D.A separate physical copy must be made before releasing the snapshot backup.

E.There is no need for InnoDB tables to perform its own recovery when restoring from the snapshot backup.

Question 22

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.One or more large tables do not have primary keys.

C.This value shows only I/O latency and is not indicative of the size of the transaction queue.

D.The master is producing a large volume of events in parallel but the slave is processing them serially.

E.The parallel slave threads are experiencing lock contention.

Question 23

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 SPATIAL INDEX (Name);

B.ALTER TABLE world.city ADD SPATIAL INDEX (Population);

C.ALTER TABLE world.city ADD INDEX (Population);

D.ALTER TABLE world.city ADD INDEX (Name);

E.ALTER TABLE world.city ADD FULLTEXT INDEX (Name);

F.ALTER TABLE world.city ADD FULLTEXT INDEX (Population);

Question 24

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.mysql> IMPORT TABLE FROM /var/lib/mysql/shop/customers.sdi

B.mysql> ALTER TABLE shop.customers DISCARD TABLESPACE

C.shell> cp /backup/customers.frm /var/lib/mysql/shop/

D.mysql> IMPORT TABLE FROM /var/tmp/customers.sdi

E.mysql> ALTER TABLE shop.customers IMPORT TABLESPACE

F.shell> cp /backup/customers.sdi /var/tmp

G.mysql> SOURCE '/var/tmp/customers.sdi'

H.shell> cp /backup/customers.sdi /var/lib/mysql/shop/

Question 25

Which three settings control global buffers shared by all threads on a MySQL server? (Choose three.)

A.tmp_table_size

B.innodb_buffer_pool_size

C.key_buffer_size

D.table_open_cache

E.sort_buffer_size

F.read_buffer_size

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