Maintenance

Which type of maintenance involves fixing bugs in a system?

• Adaptive
• Corrective
• Perfective
• Preventive

Answer explanation

Corrective maintenance fixes flaws in design or implementation.

What is the main goal of adaptive maintenance?

• Improve performance
• Prevent issues
• Meet new business needs
• Fix bugs

Answer explanation

Adaptive maintenance evolves the system for changing needs.

Which type of maintenance adds new features or improves performance?

• Corrective
• Adaptive
• Perfective
• Preventive

Answer explanation

Perfective maintenance enhances system functionality.

What percentage of maintenance is typically corrective and adds no value?

• 13%
• 75%
• 5%
• 7%

Answer explanation

Corrective maintenance is about 75% and adds no value.

What is 'Mean Time Between Failures' (MTBF) used to measure?

• Cost
• Update frequency
• System reliability
• User count

Answer explanation

MTBF tracks reliability over time.

Which factor does NOT influence system maintainability?

• User count
• Documentation quality
• Programming language
• Latent defects

Answer explanation

Programming language is not listed as a key factor.

In a combined maintenance structure, what is a potential disadvantage?

• Lack of access
• Poor documentation
• Limited mobility
• Lack of resources

Answer explanation

Combined structure may lack formal documentation.

What is the role of a system librarian in configuration management?

• Write code
• Manage access
• Control module check-in/out
• Design architecture

Answer explanation

System librarian manages module access.

What does reverse engineering do in system maintenance?

• Create new code
• Generate design from code
• Delete modules
• Test performance

Answer explanation

Reverse engineering extracts design from code.

What is a benefit of using automated development tools in maintenance?

• Eliminate documentation
• Reduce testing
• Regenerate code and update docs
• Replace analysts

Answer explanation

Automated tools help with code and documentation.