| kernel layer | handles such functions as process creation, swapping and scheduling |  |
| is a subtopic of 9.5 - Architectural Patterns | |
| is a kind of layer | |
| layer | communicates using procedure calls or by inter-process communication where the lower layers can become servers and the higher layers can become clients | |
has example The set of related services which could form a layer might include:- Services for computation
- Services for transmission of messages or data
- Services for storage of data
- Services for managing security
- Services for interacting with users
- Services provided by an operating system
- Services provided directly by the hardware
| |
| has well-defined interface that is used by layer immediately above | |
| is often divided into smaller subsystems | |
| is part of multi-layer system | |
| only communicates with the layer immediately below it | |
| sees a lower layer as a set of services it can use | |
| usually provides services through an API | |
| component | is reusable if it can be used in several different systems with little or no modification | |
| may perform a special-purpose function such as the user interface for a particular system | |
Object Oriented Software Engineering View all facts Glossary Help
