[2024年07月] 検証済みCompTIA FC0-U61日本語リアル豪華お試しセット試験問題集でPDF
FC0-U61日本語問題集PDF最新 [2024年最新] 究極の学習ガイド
質問 # 112
ソフトウェア開発者は、ソフトウェアプログラムを開発し、ソフトウェアの使用方法を段階的に説明したドキュメントを作成します。開発者は、他の人や会社がこのドキュメントを公開して公開しないことを保証したいと考えています。開発者は、ドキュメントを最もよく保護するために次のうちどれを使用する必要がありますか？
- A. Watermark
- B. Copyright
- C. Trademark
- D. Patent
正解：B
解説：
A document that explains how to use a software program is an example of a written work that expresses the original ideas of the developer. A copyright is a legal protection that grants the developer the exclusive right to publish, distribute, and control the use of the document. Reference := CompTIA IT Fundamentals (ITF+) Study Guide, 2nd Edition, Chapter 9: Intellectual Property1
質問 # 113
基本的なコンピューティング操作は次のうちどれですか？
- A. 入力、プロセス、出力、およびストレージ
- B. 入力、出力、保存、およびフィードバック
- C. 入力、プロセス、出力、およびフィードバック
- D. 入力、プロセス、および出力
正解：A
解説：
Explanation
Input, process, output, and storage are the basic computing operations that describe how a computer system works. Input is the data or instructions that are entered into the computer system by the user or another device.
Process is the manipulation or transformation of the input data by the computer system according to a set of rules or algorithms. Output is the result or information that is displayed or sent by the computer system to the user or another device. Storage is the retention or preservation of the input, output, or intermediate data by the computer system for future use. References : The Official CompTIA IT Fundamentals (ITF+) Study Guide (FC0-U61), page 28.
質問 # 114
次のうちどれが最速のプロセッサ速度を示しますか？
- A. 3.6Gbps
- B. 3.6GHz
- C. 3.6Mbps
- D. 3.6MHz
正解：B
解説：
Processor speed is measured in hertz (Hz), which is the number of cycles per second that the processor can perform. The higher the processor speed, the faster the processor can execute instructions. Gigahertz (GHz) is equal to one billion hertz, while megahertz (MHz) is equal to one million hertz. Megabits per second (Mbps) and gigabits per second (Gbps) are units of data transfer rate, not processor speed. Therefore, 3.6GHz would indicate the fastest processor speed among the options given. Reference: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 3: Computing Components, page 114.
質問 # 115
標準的なトラブルシューティング方法論の最終ステップは、次のどのアクションですか？
- A. 原因の新しい理論を作成します。
- B. ソリューションと原因を文書化します。
- C. 問題をオンラインで調査します。
- D. 予防措置を実施します。
正解：B
解説：
The final step in the standard troubleshooting methodology is to document the solution and cause of the problem. This step involves recording the details of the problem, the steps taken to resolve it, the outcome of the solution, and any preventive measures implemented to avoid future occurrences. Documenting the solution and cause can help to create a knowledge base for future reference, improve communication among IT professionals, and facilitate continuous improvement12. References := CompTIA IT Fundamentals (ITF+) Study Guide, 2nd Edition, Chapter 7: Explain the Troubleshooting Methodology3; Troubleshooting Methodology | IT Support and Help Desk | CompTIA4
質問 # 116
無線デバイスが有線ネットワークと通信できるのは次のうちどれですか?
- A. スイッチ
- B. アクセスポイント
- C. ファイアウォール
- D. モデム
正解：B
解説：
An access point is a device that allows wireless devices to communicate to a wired network. An access point acts as a bridge between the wireless and wired networks, converting radio signals from wireless devices into data packets that can be transmitted over the network cable. An access point can also extend the range and coverage of a wireless network3. Reference := CompTIA IT Fundamentals (ITF+) Study Guide, 2nd Edition, Chapter 4: Networking Concepts2
質問 # 117
次のデータベース構造のうち、最も粒度が細かいのはどれですか?
- A. テーブル
- B. フィールド
- C. 列
- D. 録音
正解：B
解説：
A field is the most granular database structure among the options given. A field is a single unit of data that represents an attribute of an entity, such as name, age, or address. A field can have a specific data type, such as text, number, or date. A column is a collection of fields that share the same data type and name, such as the name column in a table. A record is a collection of fields that represent an instance of an entity, such as a person, a product, or an order. A record can be identified by a primary key, which is a unique value for each record. A table is a collection of records that represent the same type of entity, such as the customer table or the product table. Reference: CompTIA IT Fundamentals (ITF+) Study Guide: Exam FC0-U61, Second Edition, Chapter 5: Database Fundamentals and Security Concepts, page 156
質問 # 118
従業員のラップトップは、コーヒーショップで使用されている場合、インターネットに接続しません。次のうち、最も可能性の高い原因はどれですか？
- A. スクリプトブロッカー
- B. プライベートブラウジング
- C. 完全なブラウザキャッシュ
- D. プロキシ設定
正解：D
解説：
Proxy settings are the configuration options that determine how a computer or device connects to the Internet through a proxy server. A proxy server is an intermediary server that acts as a gateway between the computer or device and the Internet. Proxy servers can provide security, privacy, caching, filtering, or access control functions. Proxy settings can affect the Internet connectivity of a computer or device depending on the proxy server's availability, location, or rules. If an employee's laptop does not connect to the Internet when it is used in a coffee shop, the most likely cause is that the proxy settings are incorrect or incompatible with the coffee shop's network. The employee may need to disable or change the proxy settings to connect to the Internet through the coffee shop's network. Script blocker, private browsing, and full browser cache are not likely causes of Internet connectivity issues when using a laptop in a coffee shop. References: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 6: Infrastructure Concepts, page 234.
質問 # 119
データベースレコードを一意に識別する値は次のうちどれですか？
- A. 外部キー
- B. 主キー
- C. 秘密鍵
- D. 公開鍵
正解：B
質問 # 120
ディスプレイ モニターに通常使用される接続タイプは次のうちどれですか?
- A. RJ45
- B. DVI
- C. Bluetooth
- D. USB
正解：B
解説：
The connection type that is typically used for a display monitor is DVI. DVI stands for Digital Visual Interface, which is a standard that defines how digital video signals are transmitted from a source device, such as a computer or a DVD player, to a display device, such as a monitor or a projector. DVI can support various resolutions and refresh rates, depending on the type and length of the cable and the capabilities of the devices. DVI can also support analog video signals, using a DVI-A connector, or both digital and analog video signals, using a DVI-I connector. However, DVI does not support audio signals, so a separate audio cable is needed. USB is not the connection type that is typically used for a display monitor, but rather a connection type that is typically used for peripheral devices, such as keyboards, mice, printers, scanners, etc. USB stands for Universal Serial Bus, which is a standard that defines how data and power are transmitted between devices using a common interface. USB can support various types and speeds of devices, depending on the version and mode of the USB port and cable. USB can also support video and audio signals, using a USB-C connector, which can be converted to other standards, such as HDMI or DisplayPort. Bluetooth is not the connection type that is typically used for a display monitor, but rather a connection type that is typically used for wireless devices, such as headphones, speakers, keyboards, mice, etc. Bluetooth is a technology that defines how data and audio are transmitted between devices using short-range radio waves. Bluetooth can support various profiles and protocols that enable different types of communication and functionality between devices. Bluetooth can also support video signals, using a Bluetooth Low Energy Video Streaming (BLE-VS) protocol, but it is not widely adopted or supported by most devices. RJ45 is not the connection type that is typically used for a display monitor, but rather a connection type that is typically used for network devices, such as routers, switches, computers, etc. RJ45 stands for Registered Jack 45, which is a connector that defines how data are transmitted between devices using twisted pair cables. RJ45 can support various standards and speeds of network communication, depending on the category and length of the cable and the capabilities of the devices. RJ45 can also support video signals, using an Ethernet AVB (Audio Video Bridging) protocol, but it is not widely adopted or supported by most devices. Reference: The Official CompTIA IT Fundamentals (ITF+) Student Guide (Exam FC0-U61), Chapter 1: IT Fundamentals
質問 # 121
開発者は、問題を解決するためにコンピュータープログラムによって使用される特定の段階的な指示/手順および条件ステートメントを作成しています。次のどれが開発されていますか？
- A. Pseudocode
- B. Software
- C. Flowchart
- D. Algorithm
正解：D
質問 # 122
従業員は建物に出入りする際にバッジを使用する必要があります。バッジが使用されるたびに、誰が建物に出入りしたかを記録するためのログ エントリが作成および保存されます。ログ エントリが提供する内容を最もよく説明しているのは次のうちどれですか?
- A. 認可
- B. 認証
- C. 自動化
- D. 会計
正解：D
解説：
The log entries that are created and stored when employees use their badges to enter and exit the building provide accounting. Accounting is a security function that records and tracks user activities and events on a system or network. Accounting can provide evidence of user actions, such as authentication, authorization, access, modification, or deletion of data or resources. Accounting can also provide information for billing, auditing, or reporting purposes. Accounting can be implemented using log files, audit trails, or monitoring tools. Automation is not a security function, but rather a process of using technology to perform tasks or operations without human intervention. Automation can improve productivity, efficiency, accuracy, or reliability of a system or network. Automation can be implemented using scripts, programs, or tools.
Authorization is not a security function that records and tracks user activities and events, but rather a security function that grants or denies user access to data or resources based on their identity and permissions.
Authorization can ensure that users only access what they are allowed to access on a system or network.
Authorization can be implemented using access control lists (ACLs), role-based access control (RBAC), or mandatory access control (MAC). Authentication is not a security function that records and tracks user activities and events, but rather a security function that verifies user identity based on credentials, such as passwords, tokens, biometrics, etc. Authentication can ensure that users are who they claim to be on a system or network.
Authentication can be implemented using single-factor authentication (SFA), multi-factor authentication (MFA), or single sign-on (SSO).
References: The Official CompTIA IT Fundamentals (ITF+) Student Guide (Exam FC0-U61), Chapter 7: Security Concepts1
質問 # 123
次のステートメントを検討してください。
「アナリスト」の入力（ウーゼリン）を考えると、クリアランス変数は次のうちどれに設定されますか？
- A. 通常
- B. アナリスト
- C. トップシークレット
- D. 制限付き
正解：D
解説：
Explanation
Float is a data type that can store decimal or fractional numbers, such as 3.14, 0.5, or -2.75. Float would be the best data type to use for storing monetary values because monetary values often involve decimals, such as
$1.99, 0.25,or-5.50. Integer is a data type that can only store whole numbers, such as 1, 0, or -2. Integer would not be suitable for storing monetary values that have decimals. The other options are not data types that can store numerical values. References: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 4: Programming Concepts and Data Structures, page 146.
質問 # 124
会社は、従業員が電子メールサーバーからメッセージをダウンロードして削除する電子メールクライアントを使用することを望んでいます。これを容易にするために、電子メールクライアントで構成する必要があるプロトコルは次のうちどれですか？
- A. SMTP
- B. POP3
- C. ICMP
- D. IMAP
正解：B
解説：
Explanation
POP3 (Post Office Protocol version 3) is a protocol that allows an email client to download and remove messages from an email server. POP3 would be the best protocol to configure in an email client to facilitate this requirement. IMAP (Internet Message Access Protocol) is a protocol that allows an email client to access and synchronize messages from an email server without removing them. ICMP (Internet Control Message Protocol) is a protocol that allows network devices to send and receive error or control messages. SMTP (Simple Mail Transfer Protocol) is a protocol that allows an email client to send messages to an email server or another email client. References: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 6: Infrastructure Concepts, page 233.
質問 # 125
すべてのユーザーがソフトウェアにアクセスする必要があるが、一貫したベースではない場合、組織にとって最もコスト効率が高いライセンス タイプは次のうちどれですか?
- A. サイト
- B. デバイス
- C. 同時実行
- D. 使い捨て
正解：C
解説：
A concurrent license would be most cost-effective for an organization where all users need access to software but not at the same time. Concurrent licenses allow a certain number of users to access the software simultaneously, regardless of who those users are. This type of licensing is efficient and economical for environments with variable software usage patterns.References: Licensing models and their applications are discussed in CompTIA IT Fundamentals, which includes various types of software licenses and their suitability for different organizational needs.
質問 # 126
モールの製品広告キオスクは、ハード ドライブのないシン クライアントを使用してセットアップされ、インターネット接続を通じて管理および更新される Web アプリケーションを実行しています。次のアプリケーション配信方法のうち、キオスクに使用されている可能性が最も高いのはどれですか?
- A. クラウドホスト型
- B. ローカルネットワークホスト型
- C. ハイブリッド搭載
- D. ローカルにインストールされています
正解：A
解説：
The application delivery method that is most likely being used for the kiosk is cloud-hosted. Cloud-hosted is a type of application delivery method that involves running and accessing an application from a remote server or service over the internet. Cloud-hosted applications do not require installation or storage on the local device, but only a web browser or a client software to connect to the application. Cloud-hosted applications can provide benefits such as scalability, availability, security, and automatic updates. A product advertising kiosk at a mall that is set up using a thin client without a hard drive and is running a web application managed and updated through an internet connection is most likely using a cloud-hosted application delivery method, as it does not need any local resources or maintenance for the application. Local network-hosted is not the application delivery method that is most likely being used for the kiosk, but rather a type of application delivery method that involves running and accessing an application from a server or a device within the same local area network (LAN) as the client device. Local network-hosted applications require installation or storage on the server or device that hosts the application, but not on the client device. Local network-hosted applications can provide benefits such as speed, reliability, and control. A product advertising kiosk at a mall that is set up using a thin client without a hard drive and is running a web application managed and updated through an internet connection is not likely using a local network-hosted application delivery method, as it would need to be connected to a server or device within the same LAN as the kiosk. Hybrid-installed is not the application delivery method that is most likely being used for the kiosk, but rather a type of application delivery method that involves running and accessing an application from both a local device and a remote server or service over the internet. Hybrid-installed applications require partial installation or storage on the local device, as well as a web browser or a client software to connect to the remote part of the application.
Hybrid-installed applications can provide benefits such as flexibility, functionality, and performance. A product advertising kiosk at a mall that is set up using a thin client without a hard drive and is running a web application managed and updated through an internet connection is not likely using a hybrid-installed application delivery method, as it would need some local resources for the application. Locally installed is not the application delivery method that is most likely being used for the kiosk, but rather a type of application delivery method that involves running and accessing an application from the local device only. Locally installed applications require full installation or storage on the local device, but do not need any web browser or client software to connect to the internet. Locally installed applications can provide benefits such as offline access, customization, and compatibility. A product advertising kiosk at a mall that is set up using a thin client without a hard drive and is running a web application managed and updated through an internet connection is not likely using a locally installed application delivery method, as it would need a hard drive or other storage device for the application. References: The Official CompTIA IT Fundamentals (ITF+) Student Guide (Exam FC0-U61), Chapter 4: Operating System Fundamentals1
質問 # 127
次のファイルシステムのうち、最も多くのオペレーティング システムと互換性があるのはどれですか?
- A. ext4
- B. HFS
- C. FAT32
- D. NTFS
正解：C
解説：
The filesystem that is compatible with the greatest number of operating systems is FAT32. FAT32 stands for File Allocation Table 32-bit, which is a filesystem that organizes data into clusters or groups of sectors on a storage device, such as a hard disk or a flash drive. FAT32 uses a 32-bit table to keep track of the location and status of each cluster. FAT32 can support volumes up to 2 TB and files up to 4 GB in size. FAT32 is compatible with most operating systems, such as Windows, Linux, Mac OS, Android, etc., as well as most devices, such as cameras, printers, game consoles, etc. FAT32 is one of the oldest and simplest filesystems, but it also has some limitations and drawbacks, such as fragmentation, waste of space, lack of security features, etc. ext4 is not the filesystem that is compatible with the greatest number of operating systems, but rather a filesystem that is mainly used by Linux operating systems. ext4 stands for Fourth Extended Filesystem, which is a filesystem that organizes data into blocks or groups of sectors on a storage device. ext4 uses an inode table to keep track of the location and attributes of each file or directory. ext4 can support volumes up to 1 EB and files up to 16 TB in size. ext4 has many features and advantages over FAT32, such as journaling, extents, subdirectories, encryption, etc., but it also has limited compatibility with other operating systems, such as Windows or Mac OS. NTFS is not filesystem that is compatible with greatest number of operating systems, but rather filesystem that is mainly used by Windows operating systems. NTFS stands for New Technology File System, which is filesystem that organizes data into clusters or groups of sectors on storage device. NTFS uses Master File Table (MFT) to keep track of location and attributes of each file or directory. NTFS can support volumes up to 256 TB and files up to 256 TB in size. NTFS has many features and advantages over FAT32, such as journaling, compression, encryption, security, etc., but it also has limited compatibility with other operating systems, such as Linux or Mac OS. HFS is not filesystem that is compatible with greatest number of operating systems, but rather filesystem that is mainly used by Mac OS operating systems. HFS stands for Hierarchical File System, which is filesystem that organizes data into blocks or groups of sectors on storage device. HFS uses catalog file to keep track of location and attributes of each file or directory. HFS can support volumes up to 2 TB and files up to 2 GB in size. HFS has some features and advantages over FAT32, such as resource forks, aliases, etc., but it also has some limitations and drawbacks, such as fragmentation, waste of space, lack of security features, etc. HFS also has limited compatibility with other operating systems, such as Windows or Linux. Reference: The Official CompTIA IT Fundamentals (ITF+) Student Guide (Exam FC0-U61), Chapter 4: Operating System Fundamentals1
質問 # 128
ヘルプ デスクの技術者は問題に遭遇し、同僚が以前に同じ問題に遭遇したかどうかを知りたいと考えています。技術者が最初に行うべきことは次のうちどれですか?
- A. 考えられる理論を研究します。
- B. ナレッジベースを確認してください。
- C. ローカルログを検索します。
- D. ユーザー数。
正解：B
解説：
A Knowledge Base is a collection of information that provides solutions to common problems or issues encountered by IT professionals. A Knowledge Base can be accessed online or offline, and can be maintained by an organization or a vendor. A help desk technician should check the Knowledge Base first before trying other methods, as it may contain the answer or a workaround for the issue3. Reference := CompTIA IT Fundamentals (ITF+) Study Guide, 2nd Edition, Chapter 6: Security2
質問 # 129
従業員は、学生情報システムに関するレポートを生成するよう求められます。従業員はスプレッドシートソフトウェアを使用し、リモートデータベースに接続してレポート用のデータを取得します。従業員が使用したアプリケーションアーキテクチャのタイプは次のうちどれですか？
- A. Webアプリケーション
- B. スタンドアロンアプリケーション
- C. クライアントサーバーアプリケーション
- D. クラウドアプリケーション
正解：C
解説：
Explanation
A client-server application is an application that runs on a client device and communicates with a server device over a network. The client device requests data or services from the server device, and the server device responds to the requests. A spreadsheet software that connects to a remote database is an example of a client-server application. The spreadsheet software acts as the client, and the database acts as the server. References : The Official CompTIA IT Fundamentals (ITF+) Study Guide (FC0-U61), page 128.
質問 # 130
IPアドレスは32ビット長です。バイトに変換すると、次のようになります。
- A. 4バイト
- B. 16バイト
- C. 64バイト
- D. 8バイト
正解：A
解説：
A byte is a unit of information that consists of eight bits. A bit is a binary digit that can have a value of either
0 or 1. An IP address is 32 bits long, which means it is composed of four groups of eight bits each. Therefore, if converted to bytes, an IP address would be four bytes long. For example, the IP address 192.168.1.1 in binary form is:
11000000.10101000.00000001.00000001
This IP address has four groups of eight bits each, which are equivalent to four bytes. References: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 6: Infrastructure Concepts, page
221.
質問 # 131
主に機密性の懸念事項は次のうちどれですか？
- A. 変更
- B. なりすまし
- C. 破壊
- D. 盗聴
正解：D
解説：
Explanation
Eavesdropping is an electronic attack where digital communications are intercepted by an individual whom they are not intended1. This is a confidentiality concern because it violates the principle of limiting access to information to authorized people only. Confidentiality is a set of rules that limits access to information1.
Eavesdropping can compromise the secrecy of the information and expose sensitive data to unauthorized parties. References:
Confidentiality, Integrity & Availability Concerns | CompTIA IT Fundamentals FC0-U61 | 6.1
質問 # 132
開発者は、データベースにテーブルを追加する必要があります。ユーザーが実行する必要があるデータベースアクティビティは次のうちどれですか？
- A. 更新
- B. レポート
- C. ALTER
- D. CREATE
正解：D
質問 # 133
データベース レコードの概念を説明しているものは次のうちどれですか?
- A. 異なるスキーマ内のテーブルのコレクション
- B. 行、列、および制約のコレクション
- C. 同じオブジェクトに関するフィールドのコレクション
- D. 同じデータベース内のスキーマのコレクション
正解：C
解説：
Explanation
The concept of a database record is best described as a collection of fields about the same object. A database record is a row in a table that represents an instance of an entity, such as a customer, an order, a product, etc. A database record consists of one or more fields that store data about the attributes of the entity, such as name, address, phone number, quantity, price, etc. A database record can be uniquely identified by a primary key, which is a field or a combination of fields that do not repeat in the table. A collection of rows, columns, and constraints is not the concept of a database record, but rather the concept of a database table. A database table is a structure that organizes data into rows and columns. Each row represents a record, and each column represents a field. A database table can have constraints that define the rules and restrictions for the data in the table, such as primary keys, foreign keys, unique keys, check constraints, etc. A collection of schemas within the same database is not the concept of a database record, but rather the concept of a database instance. A database instance is a set of memory structures and processes that manage and access a database. A database instance can contain one or more schemas, which are collections of objects that belong to a user or an application in the database, such as tables, views, indexes, etc. A collection of tables within different schemas is not the concept of a database record, but rather the concept of a database relationship. A database relationship is a connection between two tables that share common data. A database relationship can be established by using foreign keys, which are fields that reference the primary keys of another table. A database relationship can be one-to-one, one-to-many, or many-to-many depending on how many records in each table are related to each other. References: The Official CompTIA IT Fundamentals (ITF+) Student Guide (Exam FC0-U61), Chapter 6: Database Fundamentals
質問 # 134
デスクトップ管理者がプリンターをワークステーションに接続しましたが、ワークステーションがプリンターを認識しません。ワークステーションがほとんどの場合、プリンターが機能するために必要なのは次のうちどれですか？
- A. Permission
- B. Ink cartridge
- C. Driver
- D. USB cable
正解：C
解説：
A driver is a software component that enables a device, such as a printer, to communicate with the operating system of a computer. Without a proper driver, the workstation will not be able to recognize or use the printer.
Therefore, the workstation most likely needs a driver for the printer to function. The other options are not relevant to the problem of device recognition.
質問 # 135
次の接続タイプのうち、最も速いインターネット速度を提供するのはどれですか?
- A. 非対称 DSL
- B. 携帯電話
- C. 縁石までのファイバー
- D. 対称 DSL
正解：C
解説：
Among the listed internet connection types, 'Fiber to the curb' (FTTC) generally provides the fastest speeds.
FTTC involves running fiber-optic cables close to the curbs near homes or businesses, with the remaining connection to the premises being made through traditional coaxial or ethernet cabling. This provides higher speeds compared to traditional DSL (Digital Subscriber Line) or cellular connections.References: Networking and internet technologies, including different types of broadband connections, are thoroughly explored in CompTIA IT Fundamentals, emphasizing the speed and reliability differences among various internet access technologies.
質問 # 136
複雑なパスワードが必要な理由は次のうちどれですか？
- A. パスワードの多様性を促進するため
- B. 覚えにくくするため
- C. ソーシャルエンジニアリング攻撃を減らすため
- D. 誰かがそれらを推測するのを防ぐため
正解：D
解説：
A managed relational database is a type of database that is hosted and maintained by a cloud service provider such as Microsoft Azure or Amazon Web Services. A relational database is a type of database that organizes data into tables that are related to each other by common fields or attributes. A managed relational database would be the best option for allowing multiple users to create and edit reports at the same time because it can handle concurrent user requests, provide high availability and scalability, and perform complex queries and operations on the data. A text file on a shared drive, an informational intranet page, and locally installed productivity software are not options that can allow multiple users to create and edit reports at the same time because they cannot handle concurrent user requests, provide high availability and scalability, or perform complex queries and operations on the data. Reference: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 5: Database Fundamentals, page 197.
質問 # 137
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