IB Computer Science Topic 1.1.3 Compatibility Challenges Revision Notes (SL/HL)

IB Computer Science Topic 1.1.3 Compatibility Challenges Revision Notes (SL/HL) | RevisionDojo

Understanding Compatibility Issues

Legacy systems

Definition

Legacy system

System that is not supported anymore, but is still in use

Note

Compatibility issues can arise from differences in software, hardware, data formats, and even organizational cultures.

Why are legacy systems used even if they are not supported?

Critical Functionality: They perform unique tasks that newer systems may not replicate.
Data Dependency: Data stored in proprietary formats may be complex to migrate.
Cost: Replacing them can be expensive and risky.

Example

NASA still uses some legacy systems because they reliably meet specific needs, despite the availability of newer technologies.

Disadvantages of Legacy Systems

Data Incompatibility: Legacy systems often employ outdated data formats, which can hinder the exchange of information with modern systems.
Software Incompatibility: Older software may not run on newer hardware or operating systems.
Security Risks: Legacy systems often lack up-to-date security features, making them vulnerable to cyberattacks.
Maintenance Costs: Keeping legacy systems operational requires specialised knowledge and can be costly.

Strategies for Integrating Legacy Systems

Data Migration: Convert data to compatible formats for use in new systems
Middleware: Use software that bridges the gap between legacy and modern systems

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Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Understanding Compatibility Issues

Legacy systems

Definition

Legacy system

System that is not supported anymore, but is still in use

Note

Compatibility issues can arise from differences in software, hardware, data formats, and even organizational cultures.

Why are legacy systems used even if they are not supported?

Critical Functionality: They perform unique tasks that newer systems may not replicate.
Data Dependency: Data stored in proprietary formats may be complex to migrate.
Cost: Replacing them can be expensive and risky.

Example

NASA still uses some legacy systems because they reliably meet specific needs, despite the availability of newer technologies.

Disadvantages of Legacy Systems

Data Incompatibility: Legacy systems often employ outdated data formats, which can hinder the exchange of information with modern systems.
Software Incompatibility: Older software may not run on newer hardware or operating systems.
Security Risks: Legacy systems often lack up-to-date security features, making them vulnerable to cyberattacks.
Maintenance Costs: Keeping legacy systems operational requires specialised knowledge and can be costly.

Strategies for Integrating Legacy Systems

Data Migration: Convert data to compatible formats for use in new systems
Middleware: Use software that bridges the gap between legacy and modern systems

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

IB Computer Science 1.1.3 Compatibility Challenges Notes

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

Understanding Compatibility Issues

Legacy systems

Disadvantages of Legacy Systems

Strategies for Integrating Legacy Systems

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Understanding Compatibility Issues

Legacy systems

Disadvantages of Legacy Systems

Strategies for Integrating Legacy Systems

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account