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NEW QUESTION # 10
Consider a replication setup where a snapshot of the replication status shows:
Which statement is true?
- A. The melbourne channel is keeping up with the received events.
- B. The melbourne channel is resolving a GTID conflict.
- C. The sydney channel is keeping up with the received events.
- D. The last event received from the sydney channel was at 2018-05-08 14:55:01.
- E. The replication slave uses multisource replication with eight sources.
Answer: E
NEW QUESTION # 11
Consider:
Which statement best describes the meaning of the value for the key_len column?
- A. It shows how many columns in the index are examined.
- B. It shows how many bytes will be used from each index row.
- C. It shows the total size of the index row.
- D. It shows the number of characters indexed in the key.
Answer: B
NEW QUESTION # 12
Consider the table people with this definition:
The application uses a query such as:
SELECT * FROM people WHERE YEAR(Birthday) = 1980;
The query is not using an index.
Which two methods can be used to allow the query to use an index? (Choose two.)
- A. Add a generated column calculating YEAR(Birthday) and index that column.
- B. Change the WHERE clause to Birthday BETWEEN 1980-01-01 AND 1980-12-31.
- C. Add FORCE INDEX (Birthday) to the query.
- D. Add a functional index for YEAR(Birthday).
- E. Execute ANALYZE TABLE to update the index statistics.
Answer: B,C
NEW QUESTION # 13
You are using the mysqldumpslow utility to view the contents of the slow query log.
You notice the letter N and the character string `S' in a number of locations in the output.
What does the N indicate?
- A. the name of the user issuing the statement
- B. an abstracted substitution for numbers indicated in WHERE clauses
- C. an abbreviation for NULL in a statement
- D. the number of times the statement was executed
Answer: D
Explanation:
https://dev.mysql.com/doc/refman/5.7/en/mysqldumpslow.html
NEW QUESTION # 14
Which three are key advantages of standard MySQL replication? (Choose three.)
- A. provides arbitrary geographic redundancy with minimal overhead to master
- B. is easy to configure and has low performance overhead
- C. enables automatic resync of databases when discrepancies are detected
- D. synchronously guarantees identical slave copy
- E. can easily add slaves for read scaling
- F. supports native automatic failover
Answer: B,C,E
NEW QUESTION # 15
A crucial database, 'db_prod', just disappeared from your production MySQL instance.
In reviewing the available MySQL logs (General, Audit, or Slow) and your own application-level logs, you identified this command from a customer facing application:
SELECT id FROM users WHERE login='payback!';DROP DATABASE db_prod;'
Which three methods could have been used to prevent this SQL injection attack from happening?
- A. using SSL/TLS on your outward facing web servers (https://) to encrypt all user sessions
- B. writing your client code to properly escape all user input
- C. giving limited privileges to accounts used by application servers to interact with their backing databases
- D. removing any remaining anonymous accounts from your MySQL instance
- E. validating all user input before sending it to the database server
- F. changing all passwords for the MySQL account 'root'@'%'immediately after losing an employee who knew the current password
- G. using a hashing or encryption method to secure all user passwords in your MySQL tables
Answer: D,F,G
NEW QUESTION # 16
Which two are considered good security practices when using passwords? (Choose two.)
- A. Use one-way encryption for storage of passwords.
- B. Choose short passwords to save on storage space.
- C. Do not use dictionary-based words.
- D. Store passwords external to the database.
- E. Use simple keyboard actions that give mixed letters.
Answer: A,C
NEW QUESTION # 17
Consider the table people with the definition:
The application uses a query such as:
SELECT * FROM people WHERE YEAR(Birthday) = 1980;
The query is not using an index.
Which two methods can be used to allow the query to use an index?
- A. Add a generated column calculating YEAR(Birthday) and index that column.
- B. Change the WHERE clause to Birthday BETWEEN 1980-01-01 AND 1980-12-31.
- C. Add FORCE INDEX (Birthday) to the query.
- D. Add a functional index for YEAR(Birthday).
- E. Execute ANALYZE TABLE to update the index statistics.
Answer: B,C
NEW QUESTION # 18
You attempt to connect to a MySQL Server by using the mysql client program. However, you receive this notice:
What would you run to fix the issue?
- A. the mysql_upgrade script
- B. the mysql client with the --ignore-password-hashing option
- C. the mysql client with the --enable-cleartext-plugin option
- D. the install plugin command for the mysql_cleartext_password plugin
- E. the mysql_secure_installation script to update server security settings
Answer: E
NEW QUESTION # 19
An admin attempts to enforce stronger security by using these commands:
The admin then leaves the system running with the specified changes. What are two remaining security concerns?
- A. The validate_password plug-in has not been loaded.
- B. The dictionary file is an insecure location.
- C. The name of the dictionary file is too obvious.
- D. The dictionary file word list is too short.
- E. validate_password_policy cannot be set without restarting the MySQL instance.
- F. validate_password_dictionary_file cannot be set without restarting the MySQL instance.
Answer: B,C
NEW QUESTION # 20
You have just executed a manual backup by using this command:
mysqlbackup -u root -p --socket=/tmp/my.sock --backup-dir=/my/backup/ backup The operation completed without error.
What is the state of this backup and operation required before it is ready to be restored?
- A. Backup State = Prepared BackupOperation = validate
- B. Backup State = Compressed BackupOperation = copy-back
- C. Backup State = Prepared BackupOperation = apply-log
- D. Backup State = Raw BackupOperation = apply-log
- E. Backup State = Raw BackupOperation = backupdir-to-image
Answer: E
NEW QUESTION # 21
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? (Choose two.)
- A. Use REVOKE ALL PRIVILEGES FROM `mike'@'client.example.com';
- B. Use GRANT USAGE ON *.* TO `mike'@'client.example.com' MAX_USER_CONNECTIONS=0;
- C. Execute the mysql_secure_installation command.
- D. Use ALTER USER `mike'@'client.example.com' ACCOUNT LOCK;
- E. Use DROP USER `mike'@'client.example.com';
- F. Use ALTER USER `mike'@'client.example.com' PASSWORD EXPIRE;
Answer: B,E
NEW QUESTION # 22
Examine the mydata table and SELECT statements:
You issue:
mysql> begin;
mysql> update mydata set a=0 where b=3;
How many rows are now protected by locks with the default InnoDB configuration?
- A. one
- B. one row and a gap-lock
- C. one row and a next-key lock for supremum
- D. five
Answer: D
NEW QUESTION # 23
Which MySQL utility copies the master instance to a slave instance on the same host?
- A. mysqldbcopy
- B. mysqlrplsync
- C. mysqlserverclone
- D. mysqlfailover
Answer: C
Explanation:
https://docs.oracle.com/cd/E17952_01/mysql-utilities-1.5-en/mysqlserverclone.html
NEW QUESTION # 24
You are using replication and the binary log files on your master server consume a lot of disk space. Which two steps should you perform to safely remove some of the older binary log files? (Choose two.)
- A. Use the command PURGE BINARY LOGS and specify a binary log file name or a date and time to remove unused files.
- B. Remove all of the binary log files that have a modification date earlier than today.
- C. Edit the .index file to remove the files you want to delete.
- D. Ensure that none of the attached slaves are using any of the binary logs you want to delete.
- E. Execute the PURGE BINARY LOGS NOT USED command.
Answer: A,D
Explanation:
A: To safely purge binary log files, follow this procedure:
1. On each slave server, use SHOW SLAVE STATUS to check which log file it is reading.
2. Obtain a listing of the binary log files on the master server with SHOW BINARY LOGS.
3. Determine the earliest log file among all the slaves. This is the target file. If all the slaves are up to date, this is the last log file on the list.
4. Make a backup of all the log files you are about to delete. (This step is optional, but always advisable.)
5. Purge all log files up to but not including the target file.
Syntax:
PURGE { BINARY | MASTER } LOGS
{ TO `log_name' | BEFORE datetime_expr }
NEW QUESTION # 25
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Oracle 1Z1-888, also known as the MySQL 5.7 Database Administrator Exam, is a certification exam designed for individuals who are interested in becoming certified MySQL database administrators. 1Z0-888 exam tests the knowledge and skills required to effectively manage, maintain, and troubleshoot MySQL databases. Passing the 1Z1-888 exam is a great way to demonstrate your expertise and proficiency in MySQL database administration.
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