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Master the Oracle 1z0-888 Exam: Essential Study Tips and Strategies

Questions 11

Examine the mydata table and SELECT statements:

1z0-888 Question 11

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?

Options:

A.

one

B.

one row and a next-key lock for supremum

C.

one row and a gap-lock

D.

five

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Questions 12

Which statement is true about using Microsoft Windows Cluster as a platform for MySQL?

Options:

A.

It relies on the shared disk architecture being visible to both servers.

B.

It is provided by means of IP-level disk replication.

C.

It implements High Availability by using the .NET Connector’s load balancing capabilities.

D.

It is a shared-nothing architecture.

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Questions 13

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? (Choose two.)

Options:

A.

it contains the binary log.

B.

it contains a general tablespace.

C.

it is the default location for all new tables that you create.

D.

it contains the system tablespace.

E.

it contains the redo log.

F.

it contains the undo log.

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Questions 14

To satisfy a security requirement, you have created or altered some user accounts to include REQUIRE X509.

Which additional task needs to be performed for those user accounts to fulfill the requirement to use X509?

Options:

A.

Install the X509 plug-in on the server.

B.

Set the X509 option in the [client] section of the MySQL server’s configuration file.

C.

Restart the server with the --require-x509 option.

D.

Distribute client digital certificates to the client computers being used to log in by the user accounts.

E.

Provide users access to the server’s private key.

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Questions 15

What is the best method for monitoring Group Replication conflict resolution?

Options:

A.

the PERFORMANCE_SCHEMA tables

B.

the SHOW PROCESSLIST command

C.

the INNODB Lock Monitor details

D.

the SHOW STATUS command

E.

the INFORMATION_SCHEMA tables

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Questions 16

Due to an authentication plug-in that is used on the server, passwords are required to be sent as clear text as opposed to the usual encrypted format.

Which two methods would allow the mysql client to connect to the server and send clear text passwords? (Choose two.)

Options:

A.

mysql --protocol=PLAIN –uroot –p –h dbhost.example.com

B.

INSTALL PLUGIN mysql_cleartext_password SONAME ‘mysql_cleartext_password.so’;

C.

export LIBMYSQL_ENABLE_CLEARTEXT_PLUGIN=’Y’

D.

SET GLOBAL mysql_cleartext_passwords=1;

E.

mysql --enable-cleartext-plugin –uroot –p –h dbhost.example.com

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Questions 17

You have the following in your my.cnf configuration file:

[mysqld]

default_authentication_plugin=sha256_password

You want to create a new user who will be connecting from the IP address 192.0.2.10, and you want to use the authentication plug-in that implements SHA-256 hashing for user account passwords.

Which two statements would create a user named webdesign for this IP address with the password of imbatman using a SHA_256 password hash? (Choose two.)

Options:

A.

CREATE USER ‘webdesign’@’192.0.2.10’ IDENTIFIED AS sha256_user WITH sha256_password ‘imbatman’;

B.

CREATE USER ‘webdesign’@’192.0.2.10’ IDENTIFIED BY ‘iambatman’;

C.

CREATE USER ‘webdesign’@’192.0.2.10’ IDENTIFIED WITH sha256_password BY ‘imbatman’;

D.

CREATE USER WITH sha256_password ‘sha256_user’@’192.0.2.10’ IDENTIFIED AS ‘webdesign’ USING ‘imbatman’;

E.

CREATE USER ‘webdesign’@’192.0.2.10’ WITH mysql_native_password USING SHA265 BY ‘imbatman’;

F.

CREATE USER ‘webdesign’@’192.0.2.10’ IDENTIFIED BY SHA265 AS ‘imbatman’;

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Questions 18

Consider the table people with this definition:

1z0-888 Question 18

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.)

Options:

A.

Change the WHERE clause to Birthday BETWEEN 1980-01-01 AND 1980-12-31.

B.

Add a functional index for YEAR(Birthday).

C.

Execute ANALYZE TABLE to update the index statistics.

D.

Add a generated column calculating YEAR(Birthday) and index that column.

E.

Add FORCE INDEX (Birthday) to the query.

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Questions 19

Which statement describes how the relay log works?

Options:

A.

when a slave receives a change from the master, it is processed first, and then recorded in the relay log.

B.

It maintains a record of available master binary logs and the current executed log position.

C.

It stores changes on the master, and relays them to the slave.

D.

When a slave receives a change from the master, it is recorded in the relay log first and processed later.

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Questions 20

You have a config file for a running DB with this excerpt:

[mysqld]

tmp_table_size=16M

sort_buffer_size=256k

To address a query performance problem of connecting to the DB from an application on another host, you log in and make these changes to the DB:

mysql> SET GLOBAL tmp_table_size=32000000;

mysql> SET sort_buffer_size=2000000;

This solves the problem with your queries. However, later the DB instance is restarted and the performance problem returns.

Which three best describe this scenario?

Options:

A.

Global variables are not persistent across server restarts.

B.

Session variables are not persistent across server restarts.

C.

The query benefited from sort_buffer_size increase.

D.

sort_buffer_size should match tmp_table_size to be optimal.

E.

The query benefited from tmp_table_size increase.

F.

The query benefited from sort_buffer_size and tmp_table_size increases.

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Exam Code: 1z0-888
Exam Name: MySQL 5.7 Database Administrator
Last Update: Dec 2, 2024
Questions: 124

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