Most Recent Oracle 1Z0-888 Exam Questions & Answers

Prepare for the Oracle MySQL 5.7 Database Administrator exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.

QA4Exam focus on the latest syllabus and exam objectives, our practice Q&A are designed to help you identify key topics and solidify your understanding. By focusing on the core curriculum, These Questions & Answers helps you cover all the essential topics, ensuring you're well-prepared for every section of the exam. Each question comes with a detailed explanation, offering valuable insights and helping you to learn from your mistakes. Whether you're looking to assess your progress or dive deeper into complex topics, our updated Q&A will provide the support you need to confidently approach the Oracle 1Z0-888 exam and achieve success.

The questions for 1Z0-888 were last updated on Dec 21, 2024.

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Question No. 1

MySQL is installed on a Linux server and has this configuration:

[mysqld]

user=mysql

datadir=/data/mysql/

As the 'root' user, you change the datadir location by executing:

shell> cp --R /var/lib/mysql /data/mysql/

shell> chown --R mysql /data/mysql

What is the purpose of changing ownership of datadir to the 'mysql' user?

AMySQL needs to be run as the root user, but files cannot be owned by it.

BThe mysqld process requires all permissions within datadir to be the same.

CMySQL cannot be run as the root user.

DMySQL requires correct file ownership while remaining secure.

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Correct Answer: A

Question No. 2

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?

AGlobal variables are not persistent across server restarts.

BSession variables are not persistent across server restarts.

CThe query benefited from sort_buffer_size increase.

Dsort_buffer_size should match tmp_table_size to be optimal.

EThe query benefited from tmp_table_size increase.

FThe query benefited from sort_buffer_size and tmp_table_size increases.

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Correct Answer: B, C, E

Question No. 3

Host slave1 has ip address 192.0.2.10.

Host slave2 has ip address 203.0.113.50

Examine these commands:

Why did this error occur?

AThe host on the command line is not defined in the login path.

BThe mysqld instance has not been restarted after creating the login path.

CThere is no password defined in the login path.

DThe DNS is not configured correctly for slave1 host.

EThe .mylogin.cnf file is not readable.

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Correct Answer: E

Question No. 4

What does the possible_keys column in this output denote?

Aif it is possible for you to include any indexes in your query

Bwhether there are any indexes on the tables that you are querying

Cif there are any indexes that may be used to solve this query

Dwhether you are using any indexes in your query

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Correct Answer: A

Question No. 5

Which three options are most likely to be changed for production form their default values? (Choose three.)

Ainnodb_buffer_pool_size

Bmax_connections

Cjoin_buffer_size

Dcharacter_set_system

Einnodb_log_file_size

Fmax_user_connections

Gport

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Correct Answer: E, F, G

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