Changing over from the old information system to a new one by turning off the old

Question # 00004290 Posted By: expert-mustang Updated on: 12/01/2013 05:58 AM Due on: 12/01/2013
Subject Computer Science Topic General Computer Science Tutorials:
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1 Question: Changing over from the old information system to a new one by turning off the old system as the new one is turned on best describes

A Phased installation

B Single location installation

C Parallel installation

D Direct installation

E Rotation installation

Question: On a data-flow diagram, a diamond represents a process.

A True

B False

Question: When designing the navigation procedures within your system, the primary concerns are

A The design of between-field navigation and the ability to provide feedback

B Grouping data fields into logical categories and assigning group labels

C Flexibility and consistency

D Formatting and meaningful labels

E Spacing and color differences

Question: Functional decomposition is a repetitive process of breaking the description or perspective of a system down into finer and finer detail.

A True

B False

Question: A ternary relationship is the equivalent of three binary relationships.

A True

B False

Question: In a file-oriented information system, a security file ____.

A Stores relatively permanent data about an entity

B Is created and saved for backup and recovery purposes

C Stores records that contain day-to-day business and operational data

D Is a temporary file created by an information system for a single task

Question: Which of the following types of maintenance accounts for as much as 70 percent of all maintenance activity?

A Preventive maintenance

B Corrective maintenance

C Adaptive maintenance

D Perfective maintenance

E Internal maintenance

Question: In a typical file processing environment, ____ problems can occur if updates are not applied in every file.

A Rigid data structure

B Data integrity

C Referential integrity

D Data redundancy

Question: The ease with which software can be understood, corrected, adapted, and enhanced best describes

A Maintenance

B Maintainability

C Adaptability

D Comfort level

E Installation

Question: Which of the following influences most of the costs associated with maintaining a system?

A Maintenance personnel

B Documentation quality

C Number of latent defects

D Number of customers

E Tools

Question: ____ describe what objects need to know about each other, how objects respond to changes in other objects, and the effects of membership in classes, superclasses, and subclasses.

A Aggregates

B Relationships

C Clusters

D Linkages

12 Not certain of answer
Question: The dependence of nonprimary key attributes on other nonprimary key attributes best describes a

A Relationship dependency

B Transitive dependency

C Weak attribute

D Weak entity

E Weak relationship

Question: A primary key should be null.

A True

B False

Question: A relationship between object classes best defines

A Encapsulation

B Scope

C Association

D Composition

E Integration

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Question: Data-flow diagramming is one of several structured analysis techniques used to increase software development productivity.

A True

B False

Question: Referential integrity specifies that the value of an attribute of one relation depends on the existence of the same attribute in another relation.

A True

B False

Question: Which of the following functional capabilities are required for providing smooth and easy navigation within a form?

A Cursor-control capabilities

B Editing capabilities

C Exit capabilities

D Help capabilities

E All of the above

Question: During an inspection test, exactly what the code does is investigated.

A True

B False

Question: A relationship between the instances of one entity type is a

A Unary relationship

B Binary relationship

C Ternary relationship

D Singular occurrence

E Partnership occurrence

Question: When two relations, A and B, have a many-to-many relationship, we create a separate relation, C, to represent this.

A True

B False

Question: A relation is said to be in second normal form if the primary key consists of only one attribute.

A True

B False

Question: Where possible, text should appear in all uppercase on forms.

A True

B False

Question: Which of the following encompasses an object's properties and the values those properties have?

A Behavior

B Class

C State

D Encapsulation

E Incorporation

Question: Which of the following represents how an object acts and reacts?

A Behavior

B Class

C State

D Encapsulation

E Environment

Question: Which of the following provides an external interface to a class?

A Constructor

B Operation

C View

D Association

E Source

Question: During beta testing, users test a completed information system using real data in the real user environment.

A True

B False

Question: Which of the following is a true statement?

A The goal of conceptual data modeling is to capture as much of the meaning of data as is possible

B The efficiencies gained by maintaining systems at the rule rather than code level drastically reduce cost

C If a thorough repository of data descriptions is kept, the system can be regenerated as the business rules change

D The more details about data that we can model, the better the system we can design and build

E All of the above are true statements

Question: Changes made to a system to fix or enhance its functionality best defines

A Maintenance

B Support

C Repair

D Installation

E Coding


Question: When each nonprimary key attribute is identified by the whole key, the relation is said to be in at least

A Second normal form

B Third normal form

C Fourth normal form

D Fifth normal form

E A relational form

Question: The most complete acceptance testing will include

A Alpha testing, beta testing, and a walkthrough

B Beta testing, stub testing, and unit testing

C Desk checking, a system audit, and integration testing

D A system audit, system testing, and integration testing

E Alpha testing, beta testing, and a system audit

Question: During physical design, you consider

A The definitions of each attribute

B The descriptions of where and when data are entered, retrieved, deleted, and updated

C The expectations for response time and data integrity

D The descriptions of the file and database technologies to be used

E All of the above

Question: A context diagram shows the scope of the organizational system, system boundaries, external entities that interact with the system, and the major information flows between entities and the system.

A True

B False

Question: An object is an entity that has a well-defined role in the application domain, and has state, behavior, and identity.

A True

B False

Question: An association between the instances of one or more entity types that is of interest to the organization best defines

A Occurrence

B Relationship

C Natural connection

D Cardinality

E Entity link

Question: Highlighting methods should be consistently selected and used based upon the level of importance of the emphasized information.

A True

B False

Question: Use cases show the static structure of data and the operations that act on data.

A True

B False

Question: ____ is the transfer of information systems development, operation, or maintenance to an outside firm that provides these services, for a fee, on a temporary or long-term basis.

A Outsourcing

B Commission

C Subscription

D External provision

Question: A(n) ____ is a user interface that allows users to interact with graphical objects and pointing devices.





Question: An identifier is a candidate key that has been selected as the unique, identifying characteristic for an entity type.

A True

B False

Question: Transitive attributes are attributes that determine other attributes.

A True

B False

Question: Combining all normalized user views into one consolidated logical database model refers to

A Normalization

B Requirements structuring

C File integration

D View integration

E Logic modeling

Question: A functional dependency between two (or more) nonkey attributes in a relation defines a

A Weak dependency

B Partial dependency

C Simple dependency

D Transitive dependency

E Recursive dependency


Question: The purpose of acceptance testing is to

A Determine if new requirements must be added to the newly completed system

B Determine if the system meets user requirements

C Determine if the system meets its objectives

D Test a completed information system using simulated data

E Test a completed information system using real data

Question: A candidate key that has been selected as the unique, identifying characteristic for an entity type is called a(n)

A Attribute

B Identifier

C Secondary key

D Gerund

E Index

Question: On a use-case diagram, a linking relationship arises when one use case references another use case.

A True

B False

Question: An arrow on a data-flow diagram represents a(n)

A Data store

B Data flow

C Process

D Source

E Action sequence

Question: Which of the following is not a rule for structuring data entry fields?

A Never require data that is already online or that can be computed

B Always provide default values when appropriate

C Data entries should not be justified

D Always place a caption adjacent to fields

E Provide context-sensitive help when appropriate

Question: One problem in a file processing environment is ____, which means that data common to two or more information systems is stored in several places.

A Rigid data structure

B Data integrity

C Referential integrity

D Data redundancy

Question: An object has certain ____, like the make, model, and color of a car.

A Keys

B Attributes

C Indices

D Packets

Question: A use case is a complete sequence of related actions initiated by an actor; it represents a specific way to use the system.

A True

B False

Question: During stress testing, the analysts try to determine how the system performs on the range of possible environments on which it may be used.

A True

B False

Question: In all cases, a network must use a ____, which is a set of standards that govern network data transmission.

A Protocol

B Hub

C Switch

D Router

Question: Which of the following is true regarding the context diagram?

A The process symbol is labeled "0"

B The context diagram contains two processes

C Data stores must be shown on the context diagram

D The internal workings of the system are shown on the context diagram

E The context diagram organizes the processes in a tree-like structure

Question: The primary deliverable for the conceptual data-modeling step within the analysis phase is an entity-relationship diagram.

A True

B False

Question: When displaying textual information, use abbreviations and acronyms as often as possible.

A True

B False


Question: In the accompanying figure, a ____ is a field or combination of fields that uniquely and minimally identifies a particular member of an entity.

A Primary key

B Common key

C Secondary key

D Combination key

Question: In a ____, a single communication path connects the network server, departmental servers, workstations, and peripheral devices.

A Hierarchical network

B Star network

C Bus network

D Ring network

Question: ____ is a widely used method of visualizing and documenting an information system.


B Java



stion: A data ____, which is a framework for organizing and storing data, consists of one or more files or tables.

A Structure

B Roster

C Index

D Integral

Question: A use case participates in relationships with actors, not other use cases.

A True

B False

Question: Which of the following is a true statement?

A Data entities correspond to sources/sinks on a data flow diagram

B Relationships correspond to data flows on a data flow diagram

C A data entity will have many possible instances

D Verbs are used to name entity types

E An entity type is described many times in the data model


Question: A single occurrence of an entity type defines

A Entity instance

B Entity appearance

C Attribute

D Data element

E Multivalued attribute

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