Question 1

A data model is a diagram of data attributes and their relationships.

Accepted Answer

False

Question 2

Today,most organizations use the traditional approach to data management,where multiple information systems share a pool of related data.

Accepted Answer

Most organizations now use a database approach to data management, where data is organized and managed centrally, allowing multiple applications to access and use the same data efficiently, rather than having separate, duplicated data for each application.

Question 3

A database,a database management system (DBMS),and the application programs that use the data make up a database environment.

Accepted Answer

A database environment consists of a database, a DBMS that manages the data, and the application programs that use the data.

Question 4

The goal of a Structured Query Language (SQL)database is to provide faster performance and greater scalability.

Accepted Answer

The primary goal of SQL databases is to ensure data integrity, consistency, and ease of access through structured queries, not specifically to provide faster performance and greater scalability.

Question 5

In the context of relational database model,selecting involves combining two or more tables.

Accepted Answer

Selecting in the context of a relational database model typically refers to retrieving data from a table based on specific criteria, not combining tables. Combining tables is generally referred to as joining.

Question 6

By separating descriptions of the characteristics of an object,activity,or individual,a record can provide a complete description of it.

Accepted Answer

The answer of By separating descriptions of the characteristics of...

Question 7

When organizing a database,one of the key considerations include determining who will have access to the collected data.

Accepted Answer

Access control is an important aspect of database organization, and determining who will have access to the collected data is a crucial consideration in this process.

Question 8

To use the database approach to data management,no additional software is required.

Accepted Answer

To use the database approach to data management, specialized software such as a database management system (DBMS) is required. This software allows users to create, store, update, and retrieve data in a structured manner. Without it, managing data in a database would be difficult and prone to errors.

Question 9

A database installed on a personal computer is typically meant for a single user.

Accepted Answer

A database installed on a personal computer is typically meant for a single user. It is not designed or intended to be shared by multiple users simultaneously.

Question 10

In the relational model,each column in the table represents an entity,and each row represents an attribute of that entity.

Accepted Answer

In the relational model, each row represents an entity or a record, and each column represents an attribute or a field of that entity.

Question 11

One of the final steps in installing and using a large database involves "telling" the database management system (DBMS)the logical and physical structure of the data and the relationships among the data for each user.

Accepted Answer

The answer of One of the final steps in installing...

Question 12

A NoSQL database is highly scalable,meaning that a large database may be distributed across hundreds,thousands,or even tens of thousands of servers running the same NoSQL database management system.

Accepted Answer

NoSQL databases are designed to be highly scalable, and one of their key features is the ability to distribute data across multiple servers or nodes in a cluster. This allows them to handle large volumes of data and high levels of traffic, making them well-suited for modern, web-based applications that need to handle large amounts of user data and activity.

Question 13

Several records can share the same primary key.

Accepted Answer

Primary key is a unique identifier for each record in a database table. Therefore, by definition, no two records can share the same primary key.

Question 14

Oracle is currently the market leader in general purpose databases,with about three-fourths of the multibillion dollar database market.

Accepted Answer

As of my last update, Oracle is a major player in the database market but does not hold a three-fourths share. The market is more fragmented, with significant shares also held by Microsoft SQL Server, IBM Db2, and open-source databases like MySQL and PostgreSQL.

Question 15

One of the primary advantages of a relational database is that it reduces data redundancy and allows data to be organized more logically.

Accepted Answer

A relational database uses tables with primary keys and foreign keys to link related data together, thus reducing the need for duplicate data and improving data organization.

Question 16

A collection of fields about a specific object is a record.

Accepted Answer

A record is a collection of fields about a specific object or entity.

Question 17

A field represents a circuit that is either on or off.

Accepted Answer

The answer of A field represents a circuit that is...

Question 18

The specific value of an attribute is called a data entity.

Accepted Answer

The specific value of an attribute is called a data element, not a data entity. A data entity is a unique object, concept, or event that is recognizable and distinguishable from other objects, concepts, or events.

Question 19

A database should be designed to store all data relevant to a business and provide quick access and easy modification.

Accepted Answer

A database is a structured collection of data that is designed to hold all relevant data for a business. It should be designed in a way that allows for quick access and easy modification of the data within it. This allows for efficient and effective management of the business's operations and decision-making processes. Therefore, option A is correct.

Question 20

One data cleansing solution is to identify and correct the data by cross-checking it against a validated data set.

Accepted Answer

Cross-checking data against a validated data set is a common method of data cleansing, used to identify and correct errors, inconsistencies, or inaccuracies within a data set. By comparing the original data with a trusted, validated source, data analysts can identify discrepancies and either correct them or remove them from the data set.

Quiz 3: Database Systems,data Centers,and Business Intelligence