Podcast
Questions and Answers
What quality factor refers to the ability to transfer a program from one platform to another?
What quality factor refers to the ability to transfer a program from one platform to another?
Which quality factor assesses a software's ability to withstand operational challenges?
Which quality factor assesses a software's ability to withstand operational challenges?
Which ISO 9126 quality factor focuses on the effective use of system resources?
Which ISO 9126 quality factor focuses on the effective use of system resources?
What is the primary purpose of software quality assurance (SQA)?
What is the primary purpose of software quality assurance (SQA)?
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Which factor allows software code to be reused in different applications?
Which factor allows software code to be reused in different applications?
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Which factor addresses the general ease of use for end users?
Which factor addresses the general ease of use for end users?
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Which of the following is NOT a factor included in McCall's quality factors related to product operation?
Which of the following is NOT a factor included in McCall's quality factors related to product operation?
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What is the main purpose of software maintainability in McCall's quality framework?
What is the main purpose of software maintainability in McCall's quality framework?
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What aspect of software quality is emphasized by the maintainability factor?
What aspect of software quality is emphasized by the maintainability factor?
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Which factor addresses the accuracy and consistency of software security according to McCall's model?
Which factor addresses the accuracy and consistency of software security according to McCall's model?
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Which factor involves integrating different systems together?
Which factor involves integrating different systems together?
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Which quality factor assesses the effort needed to improve an operational software program?
Which quality factor assesses the effort needed to improve an operational software program?
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What do the product revision factors primarily focus on in McCall's quality model?
What do the product revision factors primarily focus on in McCall's quality model?
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Which of the following factors pertains to how easily users can learn and operate the software?
Which of the following factors pertains to how easily users can learn and operate the software?
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Which of the following quality factors is directly related to software meeting its requirements specification?
Which of the following quality factors is directly related to software meeting its requirements specification?
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Which of the following is a factor included in McCall's quality factors related to product revision?
Which of the following is a factor included in McCall's quality factors related to product revision?
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What describes re-engineering in software development?
What describes re-engineering in software development?
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What is the primary goal of reverse engineering?
What is the primary goal of reverse engineering?
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Which type of software maintenance aims to prevent future problems?
Which type of software maintenance aims to prevent future problems?
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What is a primary advantage of re-engineering compared to new software development?
What is a primary advantage of re-engineering compared to new software development?
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When software needs to be modified to align with environmental changes, which maintenance is applied?
When software needs to be modified to align with environmental changes, which maintenance is applied?
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Which of the following is NOT a factor to consider in the cost of re-engineering?
Which of the following is NOT a factor to consider in the cost of re-engineering?
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Which condition is more suitable for applying re-engineering?
Which condition is more suitable for applying re-engineering?
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What is the first step in the reverse engineering process?
What is the first step in the reverse engineering process?
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What characterizes the process of reverse engineering?
What characterizes the process of reverse engineering?
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Which step in reverse engineering focuses on ensuring consistency and correctness of the design?
Which step in reverse engineering focuses on ensuring consistency and correctness of the design?
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What is involved in corrective maintenance?
What is involved in corrective maintenance?
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Modifying software by restructuring is referred to as which type of maintenance?
Modifying software by restructuring is referred to as which type of maintenance?
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What distinguishes reverse engineering from scientific research?
What distinguishes reverse engineering from scientific research?
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Which of the following statements about the objectives of re-engineering is true?
Which of the following statements about the objectives of re-engineering is true?
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During which step of reverse engineering is a structure chart identified?
During which step of reverse engineering is a structure chart identified?
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What is meant by 'recording control flow' in the reverse engineering process?
What is meant by 'recording control flow' in the reverse engineering process?
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What is the primary purpose of Change Control in an IT environment?
What is the primary purpose of Change Control in an IT environment?
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Which approach does Quality Control represent?
Which approach does Quality Control represent?
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What is a Change Log used for in the change control process?
What is a Change Log used for in the change control process?
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What does Version Control allow users to do?
What does Version Control allow users to do?
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What advantage does Software Reuse provide?
What advantage does Software Reuse provide?
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Which of the following best describes the role of Quality Assurance?
Which of the following best describes the role of Quality Assurance?
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What is a key characteristic of the Version Control system Git?
What is a key characteristic of the Version Control system Git?
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How does Software Re-engineering improve software systems?
How does Software Re-engineering improve software systems?
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Study Notes
Software Quality and SCM
- The lecture covers software quality and software configuration management (SCM) for UGC NET Mission JRF December 2024, Software Engineering.
- The lecture includes a recap of software testing.
Topics
- Software Quality and SCM
Content
- McCall's Factors
- ISO 9126 Quality Factor
- Quality Control
- Quality Assurance
- Change Control
- Process of change control
- Software Reuse
- Software Re-engineering
- Software Reverse engineering
McCall's Quality Factors
- Introduced in 1977
- Incorporates attributes that influence software
- Categorizes software requirements into 11 factors
- Organized into three product quality factors (product operation, product revision, and product transition)
Product Operation
- Includes five software quality factors related to operation requirements
- Operational performance, convenience, ease of use, correctness
- Aids in user experience
Product Quality Factors
- Correctness: The extent to which the software meets its requirements.
- Efficiency: The amount of resources (hardware, code) needed for the software function.
- Integrity: The software's ability to prevent unauthorized access to data.
- Reliability: The software performs its intended functions without failure.
- Usability: The effort required to learn, use, and understand the software.
Product revision
- Includes three software factors for testing and maintenance
- Focuses on providing maintenance, flexibility, and testing support for the software.
Maintainability
- Effort to detect and correct errors during maintenance phase
Flexibility
- Effort required to improve an operational software program
Testability
- Effort to verify software meets specified requirements
Portability
- Effort required to transfer a program from one platform to another
Reusability
- Extent to which the program's code can be reused in other applications
Interoperability
- Effort to integrate two or more systems
ISO 9126 Quality Factors
- International standard software quality model
- Helps create a framework for assessing software
- Categorized into four different ways to address subjects of different natures
Functionality
- Key aspect of any software that ensures task completion
- Includes purpose and/or use
Reliability
- Software's ability to sustain use under varying circumstances
- Example: ATM machine operations
Usability
- Highly dependent on software's functions
- Example: ATM cash withdrawal
Efficiency
- Focuses on system resources (disk space, memory, network) used for desired functionality
Maintainability (Software Property)
- Ability to recognize and fix defects in the software
- Software should easily adapt to environmental changes
Changes to the Software (Control)
- Documentation and control processes within a controlled environment
- Ensures integrity and consistency
Quality Control
- Focuses on identifying and resolving issues after the product release
- Reactive approach: Deal with issues after they occur
- Proactive approach: Anticipate issues and take preventative measures
Quality Assurance
- Ensuring quality requirements are met before the product release
- Proactive approach: Prevent issues before they occur
Change Logs
- Document that details information about change requests in software development
- Includes project details, priority, ownership, target dates, statuses, etc.
Change Request Forms
- Form for managing decision-making regarding software changes
- Includes details like change type, benefits, resource requestors, time estimates, costs, and status
Version Control
- Revision control for managing changes to software, computer programs, documents.
- Git for version control and project management (free and open-source)
Software Reuse
- Method for creating systems from preplanned components
- Systematic component development
- Structured reuse of components in new systems
- Increases productivity
- Shortens development time
- Develops standardized software
Software Re-Engineering
- Method for increasing software maintainability
- Study and modification of an existing system to a new form
- Risk is reduced compared to new development
Reverse Engineering
- Process of understanding a software system by analyzing its structure and behavior
- Aims to analyze the software to understand its design & requirements.
Software Maintenance Types
- Corrective: Finding and fixing errors in software
- Adaptive: Modifying software to adapt to changes in its environment
- Perfective: Improving the software's functionality
Re-engineering Cost Factors
- Cost is less than developing new software
- Software quality for re-arrangement
- Tool support available for re-engineering
- Extent of required data conversion
- Availability of expert staff
Objectives of Re-Engineering
- Relating cost-cutting options for system evolution
- Relate software maintenance process
- Differentiate software and data re-engineering to explain existing problems or issues
Reverse Engineering Steps
- Collecting information about the software (design documents, etc.)
- Examining the collected information to become familiar with the system
- Extracting the program structure (structure charts)
- Recording functionality (structured languages like decision tables)
- Recording Data Flow (Data Flow Diagrams)
- Recording Control Flow (Increased levels of control structure)
- Reviewing extracted design (for consistency and correctness)
- Generating documentation (SRS, design documents, history, etc.)
Difference Between Re-Engineering and Reverse Engineering
- Re-engineering: Improve existing software, make better
- Reverse Engineering: Understand existing software's internal functioning to implement similar functionalities
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Description
This quiz focuses on software quality and software configuration management (SCM) relevant for the UGC NET Mission JRF December 2024 exam in Software Engineering. Key topics include McCall's Factors, ISO 9126, quality assurance, and the change control process. Prepare yourself with essential concepts and improve your understanding of software testing and quality metrics.
