Software Reengineering - Process and Advantages

The five-stage reengineering process (translation, reverse engineering, restructuring, modularization, data reengineering), its cost/risk advantages over replacement, and legacy system wrapping

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Views #: 187

Questions #: 12

Time: 10 minutes

Pass Score: 80.0%

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Goal of Software Reengineering

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What is the primary goal of software reengineering?

To completely rewrite a system with entirely new functionality and features

To permanently delete obsolete code without any analysis

To improve the structure and understandability of a legacy system, generally without changing its functionality

To convert all programs into exactly the same programming language across an entire industry

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What Reengineering May Involve

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Which of the following activities can be part of the software reengineering process? Select all that apply.

Replacing the original requirements specification with entirely new business goals

Redocumenting the system

Translating programs to a modern programming language

Modifying and updating the structure and values of the system's data

Refactoring the system architecture

Adding completely new business functionality not previously requested

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Two Advantages of Reengineering Over Replacement

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To complete the line match

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Click on an item in the second group
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Advantage

Reduced risk

Reduced cost

Explanation

The cost of reengineering may be significantly less than the cost of developing entirely new software

Redeveloping business-critical software from scratch carries high risk of specification errors, development problems, and delays

Match each advantage of reengineering to its correct explanation.

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Five Activities in the Reengineering Process

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Fill in the blanks to complete the names of the five reengineering process activities: source code (1), reverse (2), program structure improvement, program (3), and data (4).

Please drag and drop the selected option in the right place or type it instead

modularization

engineering

reengineering

translation

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Source Code Translation

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What does the source code translation activity in reengineering accomplish?

It converts source code directly into a finished marketing presentation

It permanently deletes all comments from the source code

It removes all functions and procedures from the original program

It converts a program from an old programming language to a more modern version of the same language, or to a different language

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Reverse Engineering Purpose

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What does reverse engineering accomplish within the reengineering process?

It deletes the original program permanently once analysis is complete

The program is analyzed and information is extracted from it to help document its organization and functionality

It builds an entirely new system from a blank specification with no reference to the original program

It converts business requirements directly into marketing materials

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Program Modularization and Architectural Refactoring

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What might program modularization involve when a system uses several different data stores?

Renaming all variables in the program to single letters

Deleting all the data stores without any replacement

Architectural refactoring to consolidate the system to use a single repository instead of multiple data stores

Adding even more separate data stores to increase redundancy

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Data Reengineering Process

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Which of the following are part of data reengineering during software reengineering? Select all that apply.

Converting existing databases to a new structure

Automatically generating brand-new business data with no relationship to the original system

Permanently encrypting all historical data so it can never be read again

Redefining database schemas to reflect program changes

Removing duplicate records

Finding and correcting mistakes in the data

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Not All Reengineering Steps Are Always Required

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Under what condition would source code translation NOT be needed in a reengineering project?

If the original developers are still employed by the company

If the application has more than 10,000 lines of code

If the system has never had any bugs reported against it

If the application's existing programming language is still going to be used

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Legacy System Wrapping

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What is the purpose of developing adaptor services as part of legacy system wrapping?

To hide the original interfaces of the legacy system and present new, better-structured interfaces usable by other components

To permanently disable all of the legacy system's original functionality

To prevent any other system from ever interacting with the legacy system again

To physically wrap server hardware in protective packaging for shipping

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Cost Spectrum of Reengineering Approaches

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Please drag and drop the options to sort them

Sort the following reengineering approaches from lowest cost to highest cost.

Automated source code conversion (cheapest)

Restructuring plus architectural changes (most expensive)

Automated restructuring with manual changes

Program and data restructuring

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Practical Limits of Reengineering

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What is a key practical limitation of software reengineering compared to building a brand-new system?

Major architectural changes, such as converting a functional system to an object-oriented one, cannot be carried out automatically and are very expensive

Reengineering is illegal for systems older than 10 years

Reengineering can be performed without any cost whatsoever using fully automated tools in all cases

Reengineering always produces a system that is more maintainable than a newly developed system

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Goal of Software Reengineering

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What Reengineering May Involve

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Two Advantages of Reengineering Over Replacement

Advantage

Explanation

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Five Activities in the Reengineering Process

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Source Code Translation

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Explanation

Reverse Engineering Purpose

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Program Modularization and Architectural Refactoring

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Data Reengineering Process

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Not All Reengineering Steps Are Always Required

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Legacy System Wrapping

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Cost Spectrum of Reengineering Approaches

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Practical Limits of Reengineering

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