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Exam Preparation

Questions in the exam are based on official training material provided by Oracle over different official platforms. Also the information in the following pieces of training is the source for the exam. Hence, candidates should complete the following training courses before appearing for the certification exam.

Candidates should complete one of the below-mentioned pieces of training for the proper understanding of content and topics. On successful completion of the training, the candidate will get the exam voucher for the certification exam.

There are two main types of resources for preparation of certification exams first there are the study guides and the books that are detailed and suitable for building knowledge from the ground up then there are video tutorial and lectures that can somehow ease the pain of through study and are comparatively less boring for some candidates yet these demand time and concentration from the learner.

Candidates who want to build a solid foundation in all exam topics and related technologies usually combine video lectures with study guides to reap the benefits of both but there is one crucial preparation tool as often overlooked by most candidates the practice exams.

Practice exams are built to make students comfortable with the real exam environment. Statistics have shown that most students fail not due to that preparation but due to exam anxiety the fear of the unknown. It is recommended to prepare notes and practice 1z0-888 Exam exam dumps.

Questions in the certification examination are based on the real-world scenarios and cater to the real-time problems implementation difficulties, hence along with all the training material and tutorial it is of utmost importance for the candidate to possess practical knowledge and experience of working in the field of MySQL Database Technology.

Scope

This certificate verifies the fundamental knowledge to become an Oracle Certified MySQL 5.7 Database Administrator ensuring if the candidate is skilled enough of practically applying the knowledge gained through pieces of training and practical experience of working within the projects.

NEW QUESTION 47
An existing master-slave setup is currently using a delayed replication of one hour. The master has crashed and the slave must be "rolled forward" to provide all the latest datA.
The SHOW SLAVE STATUS indicates these values:
* RELAY_LOG_FILE=hostname-relay-bin.00004
* RELAY_LOG_POS=1383
Which command set would make the slave current?

A. STOP SLAVE; CHANGE MASTER TO RELAY_LOG_FILE = 'hostname-relay-
bin.00004',
RELAY_LOG_POS = 1383;
B. STOP SLAVE; SET GLOBAL master_delay=0; START SLAVE;
C. STOP SLAVE; CHANGE MASTER TO MASTER_DELAY=0; RELAY_LOG_FILE
'hostname-relay-bin.00004', RELAY_LOG_POS = 1383;
D. STOP SLAVE; CHANGE MASTER TO MASTER_DELAY=0; START SLAVE;

Answer: D

NEW QUESTION 48
Where does MySQL Linux RPM install the mysqld binary?

A. /opt/mysql/server/bin/
B. /usr/local/mysql/bin/
C. /usr/sbin/
D. /usr/bin/
E. /usr/libexec/

Answer: C

NEW QUESTION 49
Which two are considered good security practices when using passwords? (Choose two.)

A. Do not use dictionary-based words.
B. Use one-way encryption for storage of passwords.
C. Choose short passwords to save on storage space.
D. Use simple keyboard actions that give mixed letters.
E. Store passwords external to the database.

Answer: A,B

Explanation:
Reference:
https://stackoverflow.com/questions/14798275/best-way-to-store-passwords-in-mysql-database

NEW QUESTION 50
When you examine a new MySQL installation with default configuration, you find a file called ibdata1 in the database directory. Which two statements are true about this file?

A. it is the default location for all new tables that you create.
B. it contains the system tablespace.
C. it contains the redo log.
D. it contains the undo log.
E. it contains a general tablespace.
F. it contains the binary log.

Answer: A,B

Explanation:
Reference:
https://dev.mysql.com/doc/refman/5.7/en/innodb-init-startup-configuration.html

NEW QUESTION 51
What is the order of tables shown in an EXPLAINoutput?

A. It lists tables in the order in which they are specified in the statement that is being explained.
B. It lists tables from the smallest to the largest.
C. It lists tables in the order in which their data will be read.
D. It lists tables from the most optimized to the least optimized.

Answer: A

Explanation:
Explanation/Reference: https://dev.mysql.com/doc/refman/8.0/en/explain-output.html

NEW QUESTION 52
These details are shown when logged in to an account:

Which set of statements would match the accounts shown?

A. mysql> CREATE USER 'employee'@'localhost' IDENTIFIED BY 'more_secrets';mysql> GRANT PROXY ON 'employee'@'localhost' TO 'robert'@'localhost';
B. mysql> CREATE USER 'robert'@'localhost' IDENTIFIED BY 'secret_password';mysql>CREATE USER 'employee'@'localhost' IDENTIFIED BY 'more_secrets';
C. mysql> CREATE_USER ''@'' IDENTIFIED WITH authentication_pam ACCOUNT LOCK;mysql> CREATE USER 'employee'@'localhost' IDENTIFIED BY 'more_secrets';mysql> GRANT PROXY ON 'employee'@'localhost' TO ''@'';
D. mysql> CREATE USER 'employee'@'localhost' IDENTIFIED BY 'more_secrets';mysql> CREATE USER ''@'' IDENTIFIED BY 'valid_password' WITH PROXY 'employee'@'localhost';

Answer: C

NEW QUESTION 53
When you examine a new MySQL installation with default configuration, you find a file called ibdata1in the database directory. Which two statements are true about this file? (Choose two.)

A. it is the default location for all new tables that you create.
B. it contains the system tablespace.
C. it contains the redo log.
D. it contains the undo log.
E. it contains a general tablespace.
F. it contains the binary log.

Answer: A,B

Explanation:
Explanation/Reference:
Reference: https://dev.mysql.com/doc/refman/5.7/en/innodb-init-startup-configuration.html

NEW QUESTION 54
You have a MySQL replication setup and you intentionally stop the SQL thread on the slave.

What are two reasons that you may stop the SQL thread on the slave while keeping the I/O thread running?

A. to allow the remaining events to be processed on the slave while not receiving new events from the master
B. to prevent schema changes from propagating to the slave before they are validated
C. to allow a backup to be created under reduced load
D. to prevent any transaction experiencing a deadlock
E. to allow for point-in-time recovery on the slave

Answer: C,E

NEW QUESTION 55
The Performance Schema includes these tables related to status variables:

Which two facts are true about these tables? (Choose two.)

A. The global_statustable is equivalent to the SHOW GLOBAL STATUSstatement.
B. The variable values in status_by_accountare the sum of those in status_by_hostand status_by_user grouped by the variable name.
C. All these tables have the same number of rows.
D. The session_statustable is equivalent to status_by_threadfor the current thread.
E. The variable values in global_statusare the sum of those in status_by_threadgrouped by the variable name.

Answer: B,D

NEW QUESTION 56
You have created a new user with this statement:
CREATE USER `erika'@'localhost' IDENTIFIED BY `first#1Pass' PASSWORD EXPIRE; What is the outcome?

A. When `erika'@'localhost' tries to log in with the MySQL command-line client, the user will have to change the password before seeing the mysql> prompt.
B. You receive a syntax error that indicates that you cannot set a password and expire it at the same time.
C. When `erika'@'localhost' tries to log in with the MySQL command-line client, the user will not be permitted to log in because the password is expired.
D. When `erika'@'localhost' tries to log in with the MySQL command-line client, the user will be permitted to log in but will not be able to issue ant statements until the user changes the password.

Answer: D

Explanation:
mysql> CREATE USER 'erika'@'localhost' IDENTIFIED BY 'first#1Pass' PASSWORD EXPIRE; mysql -u erika -pfirst#1Pass -hlocalhost mysql> use db1; ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> show variables;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

NEW QUESTION 57
Consider these global status variables:

Which two conclusions can be made from the output?

A. There are more connections being idle than executing queries.
B. There are 510 connections to MySQL at the time of the output.
C. The thread cache has been configured with thread_cache_size set to at least 6.
D. There are 140 Performance Schema threads at the time of the output.
E. All max_connections were in use at 2018-03-22 14:54:06

Answer: A,B

NEW QUESTION 58
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.
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 }
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. Execute the PURGE BINARY LOGS NOT USED command.
E. Ensure that none of the attached slaves are using any of the binary logs you want to delete.

Answer: A,E

NEW QUESTION 59
The MySQL error log shows:
InnoDB: Warning: a long semaphore wait:
The relevant parts of the InnoDB monitor output shows:

Which two options would help avoid the long wait in the future?

A. Increase the value of the innodb_lock_wait_timeout option.
B. Change the table to use HASH indexes instead of BTREE indexes.
C. Deactivate the query cache.
D. Set the value of innodb_adaptive_hash_index to zero.
E. Increase the size of the InnoDB buffer pool.
F. Increase the value of the innodb_read_io_threads option.

Answer: E,F

NEW QUESTION 60
Why should you be selective when granting the PROCESS privilege to an account?

A. It allows the use of stored routines.
B. It allows a client to control running processes on a server.
C. It allows a client to process scripts.
D. It allows a client to see another user's queries with the SHOW PROCESSLIST command.

Answer: B

NEW QUESTION 61
Consider:

Which statement best describes the meaning of the value for the key_len column?

A. It shows the total size of the index row.
B. It shows how many columns in the index are examined.
C. It shows how many bytes will be used from each index row.
D. It shows the number of characters indexed in the key.

Answer: C

NEW QUESTION 62
Which three allocate memory per thread in MySQL?

A. query cache
B. sort buffer
C. thread cache
D. read buffer
E. internal temporary table
F. InnoDB buffer pool instance

Answer: B,D,F

NEW QUESTION 63
Which statement is correct about how InnoDB storage engine uses disk space?

A. It stores its data, index and undo information in .MYD and .MYI files.
B. It stores its data in tablespace file(s). Index and data dictionary details are stored in .FRM files.
C. It stores data, index and undo information in tablespace file(s).
D. It stores data in .MYD files, index information in .MYI files, and undo information the common tablespace.
E. It stores data in .MYD files and its index and undo information in the common tablespace.

Answer: C

NEW QUESTION 64
Which three are key advantages of standard MySQL replication? (Choose three.)