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)

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QUESTION OF
Views #: 5
Questions #: 7
Time: 10 minutes
Pass Score: 80.0%
Style
Mode

Legacy System Definition

1 pts
volume_mute

What is a legacy system?

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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.

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Six Logical Components of a Legacy System

1 pts

Match each legacy system component to its correct description.

To complete the line match

  1. Click on an item in the first group
  2. Click on the match in the second group

To delete a match, double click on a line

Component

Application data
Business policies and rules
System hardware
Application software
Business processes
Support software

Description

Hardware that may no longer be available or compatible with current IT purchasing policies
Operating system, utilities, and compilers needed to run and develop the system, which may be obsolete
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
Data processed by the application system, often inconsistent and duplicated across multiple files
Definitions of how the business should be carried out and constraints on the business
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Relationships Among Legacy System Components

1 pts

Classify each relationship between legacy system components correctly.

drag and drop the selected option to the right place

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Layered View of Legacy Systems

1 pts
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.

Platform and infrastructure software
Application software
Business processes
Hardware
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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?

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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?

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Explanation

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Keywords
Undergraduate Professional