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  • [Q26-Q51] 検証済みの1Z0-921問題集と解答で合格保証で試験問題集テストエンジン [2025]

[Q26-Q51] 検証済みの1Z0-921問題集と解答で合格保証で試験問題集テストエンジン [2025]

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検証済みの1Z0-921問題集と解答で合格保証で試験問題集テストエンジン [2025]

1Z0-921問題集と78独特な問題


Oracle 1Z0-921（MySQL 2021 Implementation Essentials）試験は、IT業界で高い評価を受けている認定プログラムです。これは、データベース管理および管理でキャリアアップしたいプロフェッショナルを支援するために設計されています。認定は、個人のMySQLデータベース実装の専門知識を証明する貴重な資格を提供します。試験に合格した候補者は、自分自身を同僚から区別し、潜在的な雇用主に自分のスキルを示すのに使用できる認定を受けます。また、認定は、世界主要企業から認められているため、就職市場での競争優位性を提供します。


Oracle 1Z0-921試験に備えるために、候補者はMySQLの基礎を強く理解し、MySQLデータベースで実践的な経験をすることをお勧めします。また、試験の準備を支援するために、トレーニングコース、学習ガイド、および練習試験を活用することもできます。試験に合格すると、候補者にOracle認定スペシャリスト：MySQL 2021実装Essentials認定が授与されます。


試験は70問の選択問題から構成されており、105分以内に完了する必要があります。問題は、MySQLデータベース管理システムとその関連ツール（MySQL Workbench、MySQL Enterprise Monitor、MySQL Shell）の理解を試験するように設計されています。試験は英語と日本語の両方で利用可能であり、合格には少なくとも63％のスコアが必要です。

 

質問 # 26
What are two ways in which customers can receive notifications such as outages, configuration changes, database emergencies, and other information on their Database as a Service instances?

  • A. Browser pop-ups
  • B. Email
  • C. Application-to-application messaging
  • D. SMS-notification tab on the dashboard
  • E. Direct support call from an Oracle representative

正解：B、D


質問 # 27
Which three options are valid reasons for using a primary key in a table?

  • A. maintaining a history of row insertions or updates
  • B. preventing duplicate keys
  • C. automatic storage of data in a sorted order
  • D. exporting data faster with mysqldump
  • E. increasing performance when using select statements
  • F. to make it easier to change the PRIMARY KEY value

正解：B、D、E


質問 # 28
The user 'fwuser'@'localhost% was registered with the MySQL Enterprise Firewall and was granted privileges for the SAKILA database. You executed the commands:

You want to clear the account whitelist for the * fwuser" @* localhost* user. Which statement should you run to accomplish this?

  • A.
  • B.
  • C.

正解：C


質問 # 29
Which two are advantages of using Document Store in MySQL?

  • A. MySQL provides a native data type to store JSON data as a document
  • B. MySQL provides a native data type to index PDF documents
  • C. MySQL provides a NoSQL API to access the document store
  • D. MySQL can store XML as a schema-less database
  • E. MySQL is a document database allowing PDF and Word documents

正解：C、D


質問 # 30
You are testing a new application and want to use data masking but the database is empty. What option will generate dummy data for you to use for testing?

  • A. Use MySQL Enterprise High Availability to access one of the available data tables
  • B. Use mysqldump to import data from the sakila_dummy database sample data set.
  • C. Execute the sakila-data. sqi script to populate the database
  • D. Alter the table with the statement: ALTER TABLE IMPORT DATA WITH data_masking plugin;

正解：D


質問 # 31
Which two statements are true about MySQL Enterprise Authentication?

  • A. MySQL Enterprise Authentication makes it more difficult to set up security because you have different sets of security policies.
  • B. MySQL Enterprise Authentication supports Linux Pluggable Authentication Modules (PAM).
  • C. MySQL Enterprise Authentication supports Windows Active Directory.
  • D. MySQL Enterprise Edition automatically connects to Oracle Password Vault to verify user passwords..
  • E. MySQL Enterprise Authentication determines what operation the user can perform.

正解：B、C


質問 # 32
MySQL is installed on a Linux server with the configuration:
Which two methods can change the default options to use the authentication plug-in that implements SHA-256 hashing for user account passwords?

  • A. Add default_authentication_plugin=sha256_password under [mysqld] in the configuration file.
  • B. Create user by using CREATE USER 'newuser' @'localhost' SET PASSWORD AS 'Sh@256Pa33';
  • C. Create user by using CREATE USER 'newuser'@'localhost' IDENTIFIED WITH 'Sh@256Pa33';
  • D. Add --default_authentication_plugin=sha256_password on the command line when you invoke the server.

正解：C、D


質問 # 33
The slave connects to the master and asks for updated records. What command was issued for this to happen?

  • A. RUN SLAVE
  • B. SLAVE RUN
  • C. START RUN SLAVE
  • D. START SLAVE
  • E. SLAVE START

正解：E


質問 # 34
You have been using mysqldump for logical backups of your MySQL databases. Your MySQL database size has been growing. Which two options can reduce the backup size and speed up the backup time?

  • A. Use MySQL Enterprise Backup with the - - incremental policy to back up incrementally based on previous full backup.
  • B. Use MySQL Enterprise Backup with the - -size=compress to compress the backup file.
  • C. Use mysqldump with the - -changesonly option.
  • D. Use mysqldump with - -incremental together with the - -compress option to back up incrementally based on previous full backup and compress the incremental backup files.
  • E. Use MySQL Enterprise Backup with the - -compress option to compress the backup files and use - - compress-level to select the level of compression.

正解：C、E


質問 # 35
You need to change the password level for a test system.
Which two allow to change this level before you create new test user/passwords?

  • A. SET GLOBAL validate_password_policy=,new level,;
  • B. SET GLOBAL force_password_complex_policy=0;
  • C. Add validate_password=,new level, in the [security] section of the MySQL configuration file.
  • D. Add validate_password_policy=,new level, in the [mysqld] section of the MySQL configuration file.

正解：A、D


質問 # 36
You just installed MySQL by Using a Package Manager on Linux.
Where are the default InnoDB redo log files stored?

  • A. /var/lib/mysql
  • B. /usr/mysql
  • C. /usr/bin/logs
  • D. /var/lib/mysql/innodb
  • E. /etc/my.cnf
  • F. /usr/redo

正解：F


質問 # 37
When should you perform a backup in a MySQL database?
Response:

  • A. Only when the database size exceeds a certain limit.
  • B. Only during scheduled maintenance windows.
  • C. After critical data updates or before making significant changes to the database.
  • D. After every successful query execution.

正解：C


質問 # 38
Which two statements about the download of MySQL Enterprise Backup are correct?

  • A. MySQL Enterprise Backup can be downloaded from My Oracle Support (MOS).
  • B. MySQL Enterprise Backup comes with MySQL Utilities Package, which is available for download publicly on http://www.mysql.com.
  • C. MySQL Enterprise Backup comes with all MySQL editions including community edition.
  • D. MySQL Enterprise Backup is a separate package from MySQL Enterprise Edition. It can be downloaded from https://edelivery.oracle.com.
  • E. MySQL Enterprise Backup comes with MySQL Connector and is freely available for download.

正解：C、D


質問 # 39
What SQL keyword must be specified when creating a foreign key constraint?

  • A. a TRIGGER on the child table for cascading delete statements
  • B. an index on the foreign key
  • C. unique PRIMARY key values for both child and parent tables
  • D. the SET_FOREGIN variable in the my .cnf file
  • E. a REFERENCES in the child table to the parent table

正解：A


質問 # 40
Which three installation options are available for installing the MySQL Enterprise Monitor/Agent on Linux?

  • A. A CLI-based wizard MySQL Enterprise Monitor, Agent, and a MySQL Repository database
  • B. A MySQL Enterprise Monitor to remotely deploy the MySQL Monitor Agent
  • C. A browser-based wizard to remotely deploy the MySQL Monitor Agent
  • D. A script (with an option file) for installing MySQL Enterprise Monitor, Agent, and a MySQL Repository database
  • E. A GUI for installing MySQL Enterprise Monitor, Agent, and a MySQL Repository database

正解：A、D、E


質問 # 41
Which two deployment architectures could you use for scaling-out database reads?

  • A. Changing the system setting with memory stickiness to true in order not to swap out mysq1dfrom memory.
  • B. Adding a memcached-tier for caching data and objects in RAM to reduce the number of times an external data source must be read.
  • C. Edit the configuration file and increase the value for parallel_read_workers and reboot the server
  • D. Implementing a three-node, single-primary InnoDB Cluster.
  • E. Altering the storage engine for all tables to memory to increase performance.

正解：D、E


質問 # 42
Which of the following statements is true regarding MySQL user account privileges?
Response:

  • A. The RELOAD privilege allows a user to delete data from a table.
  • B. The GRANT option allows a user to revoke privileges from other users.
  • C. A user with the SUPER privilege can only read data from the database.
  • D. The USAGE privilege allows a user to connect to the MySQL server but grants no other privileges.

正解：D


質問 # 43
Which is true about inserting an additional line in a single document stored in MySQL document store?

  • A. The path specified must be an array position past the end of an array using the JSON_POSITION statement.
  • B. You cannot insert a single line, you have to replace the entire document with a new document.
  • C. You specify the new element,s position in the JSON_ARRAY_INSERT statement.
  • D. Any new lines can only be inserted at the end of the document.

正解：C


質問 # 44
Which statement would you use to remove the population column from the city table?

  • A. DROP population FROM city;
  • B. ALTER TABLE city LESS population;
  • C. DELETE population FROM city;
  • D. ALTER TABLE city DELETE population;
  • E. ALTER TABLE city DROP population;

正解：E


質問 # 45
Which three are recommended configurations for installing and running MySQL InnoDB Cluster?

  • A. Networks must be in separate regions.
  • B. use SSD,s for data and replication logs
  • C. Groups must be in even numbers; 2, 4, 6, 8.
  • D. Use Network-attached storage (NAS) for the data files.
  • E. smaller VM,s work best - with a maximum of eight vCPU,s and 16GB of RAM
  • F. The number of machines per group must be 3, 5, 7 or 9.
  • G. isolated machine resources

正解：C、D、F


質問 # 46
You set up a compressed full backup file from mysqlbackup by using the --compress option for MySQL Database backup. You are required to restore the database and apply the log.
Which two options should you add to the mysqlbackup to achieve the restoration of the database?

  • A. --uncompress
  • B. --copy-back-and-apply-log
  • C. --uncompress-and-apply-log
  • D. --decompress
  • E. --apply-log-and-copy-back

正解：A、B


質問 # 47
Which statement adds a column with the largest integer data type?

  • A. ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(10,10);
  • B. ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(15,10);
  • C. ALTER TABLE SCIENTIFIC ADD scientific_value INTEGER;
  • D. ALTER TABLE SCIENTIFIC ADD scientific_value BIGINT;

正解：D


質問 # 48
What is true about MySQL Enterprise Transparent Data Encryption (TDE)?

  • A. Encryption key is stored in a centralized key memory location
  • B. Enables data-at-rest encryption by encrypting the physical files of the database.
  • C. Tablespace keys are managed manually behind the scenes.
  • D. Data is encrypted automatically, in real time, after it is written to storage.

正解：B


質問 # 49
Which best describes database horizontal scale-out architecture deployment in MySQL in a read-heavy environment?

  • A. Deploy MySQL read-only slaves utilizing replication so that the slaves can be used for reads.
  • B. Increasing the storage capacity so that the database can store more data to scale.
  • C. Allocating more CPU to the database instance to improve throughput performance.
  • D. Increasing the memory capacity so that there is a larger pooling buffer to increase the database read performance.
  • E. Adding more MySQL servers and sharing the same dacadir on a shared storage component like NFS.

正解：B


質問 # 50
You have created your Compute instance using an Oracle-provided Oracle Linux image.
You want to log in to your OCI Compute instance using SSH. Which three items do you need for this process?

  • A. The root user
  • B. User Password
  • C. SSH public key
  • D. The opc user
  • E. Public IP address
  • F. SSH private key

正解：D


質問 # 51
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1Z0-921問題集は合格保証付き！合格させる1Z0-921試験：https://www.passtest.jp/Oracle/1Z0-921-shiken.html

1Z0-921試験問題集でベスト問題集を無料で試そう1Z0-921試験問題：https://drive.google.com/open?id=1_TLyX53cjlpJGYOjbRz6njj-Z1CHPvuv

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