1. A data ____, which is a framework for organizing and storing data, consists o
ID: 3582716 • Letter: 1
Question
1.
A data ____, which is a framework for organizing and storing data, consists of one or more files or tables.
Please provide your answer in the rich text box.
A
Structure
B
Roster
C
Index
D
Integral
2.
A named two-dimensional table of data is a(n)
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A
Network
B
Tree structure
C
Relation
D
Tuple
E
Object
3.
Which of the following properties of a relation states that an entry at the intersection of each row and column is single-valued?
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A
Entries in cells are simple
B
Entries in columns are from the same set of values
C
Each row is unique
D
The sequence of rows is insignificant
E
The sequence of columns can be interchanged
4.
This type of user documentation is intended primarily for those who will install and administer a new system and contains information about the network on which the system will run, software interfaces for peripherals such as printers, troubleshooting, and setting up user accounts.
Please provide your answer in the rich text box.
A
External documentation
B
User's manual
C
System documentation
D
System administrator's guide
E
Programmer's guide
5.
A component of a software package or application in which training and educational information is embedded best defines
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A
Resident expert
B
Computer-aided instruction
C
Electronic tu torial
D
Electronic performance support system
E
Electronic encyclopedia
6.
The technique where users must confirm their intention twice before being allowed to proceed is called
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A
Double-confirmation
B
Double-checking
C
Replacement confirmation
D
Validity confirmation
E
Feedback confirmation
7.
A particular relationship between two attributes best defines
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A
Context
B
Functional dependency
C
Normal form
D
Structure
E
Join
8.
____ is a widely used method of visualizing and documenting an information system.
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A
UML
B
Java
C
UNIX
D
DFD
9.
Which of the following properties should be satisfied when the identifier of the entity type becomes the primary key of the corresponding relation?
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A
The value of the key must uniquely identify every row in the relation
B
The key should serve as a foreign key in at least two other relations
C
The key must be a composite of a primary key and a secondary key
D
The key should be an intelligent key
E
The key should allow for null values
10.
All of the following are types of user documentation except
Please provide your answer in the rich text box.
A
Release description
B
Reference guide
C
Acceptance sign-off
D
Entity-relationship diagrams
E
user's guide
A data ____, which is a framework for organizing and storing data, consists of one or more files or tables.
Please provide your answer in the rich text box.
A
Structure
B
Roster
C
Index
D
Integral
Explanation / Answer
1)answer:A structure
2)answer:C Relation
3)answer:A Entries in cells are simple
4)answer:D System administrator's guide
5)answer:D Electronic performance support system
6)answer:A Double-confirmation
7)answer:B functional dependency
8)answer:A UML
9)answer:A The value of the key must uniquely identify every row in the relation
10)answer:B reference guide
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