IGCSE Computer Science Paper-1: Specimen Questions with Answers 76 - 77 of 164
Question number: 76
Write in Short
Differentiate between Cohesion and Coupling.
Explanation
Cohesion may be defined as the indication of the relationship within module. Whereas Coupling represents the relationships between modules.
Cohesion follows Intra – Module Concept Whereas Coupling follows Inter -Module Concept.
Cohesion is the property of an individual module. Whereas Coupling is the property of the collection of modules.
Image of the Collection of Modules
Question number: 77
Write in Short
Explain Demand Paging and Kernel.
Explanation
Demand Paging is method which doesn’t require the entire processes or pages to be in memory before actually the program execution begins.
i) It is a type of swapping done in Virtual memory systems.
ii) They can be loaded off the disk when required.
Kernel is responsible for connecting applications to the actual processing of data.
i) A Kernel is the core of every operating system.
ii) It is also responsible for managing communication between software and hardware components so as to ensure usability and reliability.
Image of the Demand Paging in Operating System
Image of the Application