1z0-888 Oracle MySQL 5.7 Database Administrator exact Exam Questions

MySQL 5.7 Database Administrator

Last Update 19 hours ago Total Questions : 124

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Question # 4

You want to immediately stop access to a database server for remote user ‘mike’@’client.example.com’. This user is currently not connected to the server.

Which two actions can you take to stop any access from the user?

Use ALTER USER ‘mike’@’client.example.com’ PASSWORD EXPIRE;

Use REVOKE ALL PRIVILEGES FROM ‘mike’@’client.example.com’;

Execute the mysql_secure_installation command.

Use DROP USER ‘mike’@’client.example.com’;

Use GRANT USAGE ON *.* TO ‘mike’@’client.example.com’ MAX_USER_CONNECTIONS=0;

Use ALTER USER ‘mike’@’client.example.com’ ACCOUNT LOCK;

Question # 5

Consider these global status variables:

Which two conclusions can be made from the output? (Choose two.)

There are 140 Performance Schema threads at the time of the output.

There are 510 connections to MySQL at the time of the output.

The thread cache has been configured with thread_cache_size set to at least 6.

There are more connections being idle than executing queries.

All max_connections were in use at 2018-03-22 14:54:06

Question # 6

After analysis on the slow query log on a high-end OLTP service, the table identified in the slow queries is:

What are the two most likely reasons for the slowness given this output? (Choose two.)

Date should be a TIMESTAMP field for better performance.

The User field is too long for most names.

The engine type is not appropriate to the application use.

Using default values for DATETIME causes table scans.

No indexes are defined.

Question # 7

You are investigating the performance of the server and see this information:

events_waits_summary_global_by_event_name in the Performance Schema shows that the wait/synch/mutex/sql/LOCK_table_cache event is dominating other wait events.
The Table_open_cache_overflows status variable is 0.

Which action should be taken to remove the performance bottleneck described here?

Increase the value of table_open_cache_instances.

Decrease the value of table_definition_cache.

Decrease the value of table_open_cache.

Increase the value of table_definition_cache.

Increase the value of table_open_cache.

Decrease the value of table_open_cache instances.

Question # 8

Which two statements are true regarding the creating of new MySQL physical and logical backups? (Choose two.)

Physical backups can be used to recover from data corruption.

Logical backups are human-readable whereas physical backups are not.

Logical backups are always larger than physical backups.