Legacy Systems - Definition and Sociotechnical Nature

What makes a system "legacy," why it's more than just code, and the six interconnected components (hardware, software, data, business processes, policies)

download Export

search_insights Statistics

stylus_note White Board

Quran

calculate Calculator

dictionary Dictionary

fullscreen Full Screen

more_vert More

QUESTION OF

volume_mute Read quiz aloud

Views #: 204

Questions #: 7

Time: 10 minutes

Pass Score: 80.0%

Style

Step

List

Mode

Exam

Practice

Legacy System Definition

1 pts

volume_mute

What is a legacy system?

Any software system that is less than one year old

An older software system that relies on languages and technology no longer used for new systems development

A system that has never been modified since its original release

A system that runs exclusively on cloud infrastructure

note_alt Add notes

flag Flag

volume_mute

Correct Answer

Explanation

Legacy Systems Are Sociotechnical Systems

1 pts

volume_mute

True or False: A legacy system is best understood as just the software code, without considering the surrounding hardware, business processes, or organizational policies.

True

False

note_alt Add notes

flag Flag

volume_mute

Correct Answer

Explanation

Six Logical Components of a Legacy System

1 pts

volume_mute

To complete the line match

Click on an item in the first group
Click on an item in the second group
To delete a match, double click on a line

Component

System hardware

Application software

Support software

Application data

Business processes

Business policies and rules

Description

Operating system, utilities, and compilers needed to run and develop the system, which may be obsolete

Definitions of how the business should be carried out and constraints on the business

Data processed by the application system, often inconsistent and duplicated across multiple files

Hardware that may no longer be available or compatible with current IT purchasing policies

Processes used to achieve a business objective, such as issuing an insurance policy

The collection of application programs providing business services, developed at different times

Match each legacy system component to its correct description.

note_alt Add notes

flag Flag

volume_mute

Correct Answer

Explanation

Relationships Among Legacy System Components

1 pts

volume_mute

Relationship

×Application software embeds knowledge of business policies and rules

×Business processes are constrained by business policies and rules

×Application software runs-on system hardware

Correct relationship

Incorrect relationship

Classify each relationship between legacy system components correctly.

note_alt Add notes

flag Flag

volume_mute

Correct Answer

Explanation

Layered View of Legacy Systems

1 pts

volume_mute

Please drag and drop the options to sort them

Sort the four layers of a legacy system from the lowest (foundational) layer to the highest layer.

Hardware

Application software

Platform and infrastructure software

Business processes

note_alt Add notes

flag Flag

volume_mute

Correct Answer

Explanation

Encapsulation Assumption in Layered Systems

1 pts

volume_mute

Why is the assumption that changes within one layer of a legacy system will not affect adjacent layers an oversimplification?

Because each layer in a legacy system uses a different unrelated programming paradigm

Because legacy systems never actually have any layered structure at all

Because changing one layer can introduce new facilities that higher layers are then modified to exploit, and changes can also ripple to lower layers such as hardware

Because layers in legacy systems are always developed by completely unrelated companies

note_alt Add notes

flag Flag

volume_mute

Correct Answer

Explanation

Hardware Interface Maintenance Problem

1 pts

volume_mute

Why is it often impossible to maintain hardware interfaces unchanged when new hardware is introduced, particularly in embedded systems?

Because embedded systems never use any hardware at all

Because embedded systems are not allowed to use any hardware interfaces by law

Because hardware interfaces are always backward compatible regardless of system type

Because there is tight coupling between software and hardware in embedded systems, so major application software changes may be required to use new hardware effectively

note_alt Add notes

flag Flag

volume_mute

Correct Answer

Explanation

Undergraduate Professional

Legacy System Definition

Correct Answer

Explanation

Legacy Systems Are Sociotechnical Systems

Correct Answer

Explanation

Six Logical Components of a Legacy System

Component

Description

Correct Answer

Explanation

Relationships Among Legacy System Components

Correct Answer

Explanation

Layered View of Legacy Systems

Correct Answer

Explanation

Encapsulation Assumption in Layered Systems

Correct Answer

Explanation

Hardware Interface Maintenance Problem

Correct Answer

Explanation

Quran Recitation

Query Dictionary

Select a result: