Deck 8: Basic Systems Concepts and Tools

Question 1

Which of the following is a type of control that is used to ensure the development of a high quality,reliable information system?

A) methodology standards
B) system testing
C) system backup
D) all of the above

Answer 1

D

Question 2

When a physical model of a system is depicted with a diagram,cylinders are used to represent:

A) major modules.
B) databases.
C) data flows.
D) processes.

Answer 2

B

Question 3

Using a payroll system as an example,paychecks and W-2 forms are examples of which of the following system elements?

A) outputs
B) inputs
C) storage
D) memory

Answer 3

A

Question 4

Which of the following technique is most closely associated with the Logical To-Be model?

A) work process flow diagram
B) context diagram
C) data flow diagram
D) swimming lane diagram

Question 5

Which of the following is not an example of a principal method for system decoupling?

A) slack resources to provide alternative paths
B) usage of standards
C) sharing data stores
D) benchmarking

Question 6

Using a sales tracking system as an example,the customer orders and customer returns of goods are examples of which type of system components?

A) outputs
B) inputs
C) storage
D) memory

Question 7

Procedural-oriented approaches to systems design first involve the:

A) Logical To-Be model.
B) As-Is model.
C) Physical To-Be model.
D) Want-To-Be model.

Question 8

Which of the following elements usually includes subcomponents to filter,translate,store,and correct data that flows through it?

A) component
B) environment
C) storage
D) interface

Question 9

Which of the following describes an early step in the implementation phase of the systems life cycle?

A) The system is detailed functionally, and then its physical design is specified.
B) Programs and computer files are designed.
C) Operational feasibility is conducted.
D) Data and procedures from the old system are converted.

Question 10

A physical system description depicts ________ the system operaters,while a logical system description depicts ________ the system does.

A) how; what
B) how; why
C) what; how
D) why; what

Question 11

Which of the following is not graphically represented in a data flow diagram (DFD)?

A) sender
B) process
C) data flow
D) data store

Question 12

Why is it important for a system analyst to document formal as well as informal systems within an organization?

A) informal systems are always less efficient.
B) the usage of an informal system by users means that the formal system is deficient in some way and users have designed ways to work around it.
C) informal systems require natural language processing, but formal systems do not.
D) all of the above

Question 13

Which of the following is an example of a goal of hierarchical decomposition?

A) to take advantage of the simplicity of a system
B) to analyze or change only part of the system
C) to design and build each subsystem at the same time
D) to increase the interdependence of the system components

Question 14

As defined in the textbook,the generic systems development life cycle consists of the following three phases:

A) requirements, design, and implementation.
B) definition, construction, and implementation.
C) specifications, development, and installation.
D) feasibility analysis, testing, and maintenance.

Question 15

Which of the following best describes the construction phase of the systems life cycle?

A) The system is functionally designed, and then its physical design is specified.
B) The new system is installed.
C) Business and systems professionals document systems needs and feasibility.
D) Data and procedures from the old system are converted.

Question 16

Which is a basic principle of business process reengineering (BPR)suggested by Hammer ?

A) integrating information processing into the work that produces the information
B) building reengineering efforts around legacy systems
C) developing parallel processes for redundancy
D) escalating decision-making up an organizational hierarchy

Question 17

Which of the following best describes the definition phase of the systems life cycle?

A) The system is functionally designed, and then its physical design is specified.
B) The new system is installed.
C) Business and systems professionals document systems needs and feasibility.
D) Data and procedures from the old system are converted.

Question 18

A numerical digit based on the other digits within a numerical identifier is referred to as a:

A) ITIL rule.
B) check digit.
C) lottery number.
D) none of the above

Question 19

Which of the following system descriptions depicts the function and purpose (the what)of the system without reference to,or implications for,the actual way in which the system will be implemented?

A) functional system description
B) logical system description
C) physical system description
D) network system description

Question 20

In basic systems terminology,the process of breaking down a system into successive levels of subsystems is called:

A) functional analysis.
B) factoring.
C) interfacing.
D) hierarchical decomposition.

Question 21

Which of the following statements is not true about system testing controls in the construction phase of the systems life cycle?

A) Each program is tested individually and in combination with other programs.
B) The results from processing typical and atypical inputs are examined.
C) Users are not involved in system testing.
D) Validation rules and calculations are checked.

Question 22

All of the following are tools for representing the Logical To-Be model of an information system except a(n):

A) program chart.
B) data dictionary.
C) entity-relationship diagram.
D) data flow diagram.

Question 23

In general,the term "system" is defined as a set of interrelated components that must work together to achieve some common purpose.

Question 24

When developing a logical data flow diagram,a circle indicates:

A) an element in the environment of the system that sends or receives data.
B) data in motion.
C) data at rest.
D) a process component.

Question 25

Which of the following diagrams is not part of the Unified Modeling Language for O-O modeling?

A) class diagram
B) context diagram
C) sequence diagram (to capture messages)
D) use Case diagram

Question 26

In the object-oriented (O-O)approach to software engineering,the term "encapsulation" refers to:

A) sharing commonalities between classes of objects.
B) a relationship between a generalized object class and one or more specialized classes.
C) storing data and related operations together within objects.
D) the reusability of objects across a wide variety of applications.

Question 27

System testing only occurs when systems are initially developed.

Question 28

Security measures that are concerned with whether or not users can run an application,read a file,or change data in a database,or can change who can access to data that others have created are referred to as:

A) logical access controls.
B) physical access controls.
C) backup procedures.
D) audit trails.

Question 29

The most common approach to defining data elements in a DFD is to create a(n):

A) data store.
B) data dictionary/directory.
C) process.
D) external entity.

Question 30

Controls for the validity of data entered into an application program (such as ensuring that only numbers are entered into a numeric field)are referred to as:

A) batch totals.
B) encryption rules.
C) access privileges.
D) edit rules.

Question 31

When developing a logical data flow diagram,a rectangle (or open rectangle)indicates:

A) data at rest.
B) data in motion.
C) an element in the environment of the system that sends or receives data.
D) a process component.

Question 32

What set of international guidelines includes an extensive set for implementation management practices against which firms can benchmark their own practices?

A) CCM
B) COSO
C) ITIL
D) none of the above

Question 33

One of the fundamental principles of systems analysis and design (SA&D)is that the logical system should be described before the physical system.