DATA 630: Applied Database Management Week 1-5 Questions And Answers Rated A+ New Update Assured Satisfaction
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DATA 630: Applied Database Management
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DATA 630: Applied Database Management
What is the primary feature of a database management system?
Efficient data handling. It stores data in an organized manner.
Data security and access control.
It allows for easy access and manipulation of data.
Minimize Data redundancy. It reduces data duplication.
All of the above - ️️ALL...
What is the primary feature of a database management system?
Efficient data handling. It stores data in an organized manner.
Data security and access control.
It allows for easy access and manipulation of data.
Minimize Data redundancy. It reduces data duplication.
All of the above - ✔️✔️ALL
What is data modeling primarily used for? - ✔️✔️To represent relationships between
business entities
In data-related terms, what is an entity? - ✔️✔️A thing in the real world with an
independent existence
What is a record in storage-related terms? - ✔️✔️A group of related fields
In a binary relationship, how many entities are involved? - ✔️✔️TWO
What can be seen as a disadvantage of data redundancy?
Wastes storage space
Leads to data inconsistencies
Both A and B
Neither A nor B - ✔️✔️BOTH A & B
Which of the following best defines an attribute in database terms? - ✔️✔️A
characteristic or property of an entity
Which of the following best describes a ternary relationship? - ✔️✔️A relationship
among three entities
Which of these is NOT a storage-related term?
Entity
Field
Record
File - ✔️✔️Entity
Historically, why did the development of database management systems arise?
, To manage increasing volumes of business data
To develop modern computers
To facilitate online shopping
To improve graphics in computer games - ✔️✔️To manage increasing volumes of
business data
What best describes the essence of data modeling?
Diagramming the business environment
Programming the database
Storing data in a physical location
Encrypting sensitive data - ✔️✔️Diagramming the business environment
Historically, what has driven many information technology developments? - ✔️✔️Data
needs
Which relationship allows both entities to have multiple instances related to multiple
instances of the other entity?
One-to-one
One-to-many
Many-to-many
Unary - ✔️✔️Many-to-many
Which of these is an accurate description of a record in a database?
A collection of related databases
A specific characteristic of an entity
A group of related fields representing an entity
A diagram showing relationships between entities - ✔️✔️A group of related fields
representing an entity
True/ False: Candidate keys can have null values in a relational database - ✔️✔️False
True/False: In a one-to-many relationship, the many side typically contains a foreign key
referencing the primary key on the one side. - ✔️✔️True
True/False: The select operator and project operator in relational algebra serve the
same purpose and can be used interchangeably. - ✔️✔️False
In relational database terms, which of the following best describes a 'relation'?
A row in a table
A set of tuples
A database key
A database query - ✔️✔️A set of tuples
How is a many-to-many relationship implemented in a relational database? Using two
foreign keys
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