Download Oracle.1z0-883.PracticeTest.2018-10-25.52q.tqb
| Vendor: | Oracle |
| Exam Code: | 1z0-883 |
| Exam Name: | MySQL 5.6 Database Administrator |
| Date: | Oct 25, 2018 |
| File Size: | 552 KB |
Demo Questions
Question 1
Which query would you use to find connections that are in the same state for longer than 180 seconds?
- SHOW FULL PROCESSLIST WHEER Time > 180;
- SELECT * FROM INFORMATION_SCHEMA.EVENTS SHERE STARTS < (DATE_SUB (NOW ( ), INTERVAL 180 SECOND) );
- SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE STATE < (DATE_SUB (NOW ( ), INTERVAL 180 SECOND) );
- SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST WHERE TIME > 180;
Correct answer: D
Explanation:
The show processlist cannot use where clause. mysql> show full processlist where time>0; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'where time>0' at line 1 The show processlist cannot use where clause.
mysql> show full processlist where time>0;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'where time>0' at line 1
Question 2
A database exists as a read-intensive server that is operating with query_cachek_type = DEMAND.
The database is refreshed periodically, but the resultset size of the queries does not fluctuate.
Note the following details about this environment:
- A web application uses a limited set of queries.
- The Query Cache hit rate is high.
- All resultsets fit into the Query Cache.
- All queries are configured to use the Query Cache successfully.
The response times for queries have recently started to increase. The cause for this has correctly been identified as the increase in the number of concurrent users accessing the web service.
Based solely on the information provided, what is the most likely cause for this slowdown at the database level?
- The Query Cache is pruning queries due to an increased number of requests.
- Query_cache_min_res_unit has been exceeded, leading to an increased performance overhead due to additional memory block lookups.
- Mutex contention on the Query Cache is forcing the queries to take longer due to its single-threaded nature.
- The average resultset of a query is increasing due to an increase in the number of users requiring SQL statement execution.
Correct answer: C
Question 3
You have a login-path named “adamlocal” that was created by using the mysql_config_editor command.
You need to check what is defined for this login_path to ensure that it is correct for you deployment.
You execute this command:
$ mysql_config_editor print –login-path=adamlocal
What is the expected output of this command?
- The command prints all parameters for the login-path. The password is printed in plain text.
- The command prints all parameters for the login-path. The password is shown only when you provide the –password option.
- The command prints all parameter for the login-path. The password is replaced with stars.
- The command prints the encrypted entry for the login-path. The is only possible to see if an entry exists.
Correct answer: C
