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MYSQL 1Z0-874 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Backup and Recovery | - Recovery procedures
|
| MySQL Architecture and Administration | - User management and security
|
| Performance Tuning and Optimization | - Query optimization
|
| Replication and High Availability | - Failover and scaling
|
MYSQL MySQL 5.0 Database Administrator Certified Professional Exam, Part II Sample Questions:
It is important to analyze queries that involve joins with EXPLAIN because...
- A. Using EXPLAIN before executing the query helps the server prepare the statements used.
- B. Joins have the potential to cause more server processing if not defined correctly.
- C. Joins are more prone to mistakes.
Correct Answer: B 🗳️
Consider the following: mysql> EXPLAIN SELECT DISTINCT City.id,City.name -> FROM City,Country -> WHERE Country.Name IN ('United States','Canada','Mexico') -> AND City.CountryCode=Country.Code -> ORDER BY name *************************** 1. row *************************** id: 1 select_type: SIMPLE table: City type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 4079 Extra: Using temporary; Using filesort *************************** 2. row *************************** id: 1 select_type: SIMPLE table: Country type: eq_ref possible_keys: PRIMARY key: PRIMARY
key_len: 3
ref: world.City.CountryCode
rows: 1
Extra: Using where;
Distinct
Which of the following best describes the meaning of the values in the ref columns?
- A. No index columns are used to choose rows from Country and the City.CountryCode column is used to reference rows in the City table.
- B. City.CountryCode is used to sort what rows are returned from the City table.
- C. No indexed columns are used to choose rows from City and the City.CountryCode column is used to reference rows in the Country table.
Correct Answer: C 🗳️
Why is --bind-address an important security option?
- A. Mysqld will turn off networking and will only accept local connections
- B. Mysqld will only accept connections from the given address.
- C. Mysqld won't accept any connections at all.
- D. On a server with multiple network interfaces, you can have mysqld accept connections only on the given interface.
Correct Answer: D 🗳️
In order to create an account where no username is needed for login, ...
- A. The account should be created with the username "%"
- B. The account should be created with the username "anon"
- C. None of the above
- D. Accounts cannot be specified in a way such that no username is required
- E. The account should be created with a username consisting of the empty string
Correct Answer: E 🗳️
What kind of replication is supported by the MySQL server?
- A. Multiple-master replication
- B. Master to slave replication
- C. Single file based clustering
- D. MySQL doesn't support replication
Correct Answer: B 🗳️
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