Layers of Abstraction in Computer System
Computer System is divided into two functional entities. Hardware and Software are two functional entities of computer system. Operating system is the link between hardware and software. There are a certain layers in computer system through which a process goes to perform a task. Here we will discuss about each layer.
Following are the different layers of abstraction in computer system:
- Problem Statement –
Problem Statement is stated using natural language. It may be ambiguous or imprecise. It is basically the user’s requirement from the system.
- Algorithm –
Algorithm is the step by step procedure to perform a specific task. It is guaranteed to finish. It has definiteness, effective computability and finiteness.
- Program –
Program expresses the algorithm using a computer language such as high level language and low level language. User writes the code for their problem statement.
- Instruction Set Architecture –
Instruction set architecture specifies the set of instructions the computer can perform using data types and addressing modes.
- Micro-architecture –
Micro-architecture is the detailed organization of a processor implementation.
- Logic Circuits –
Logic circuits combine basic operations to realize micro-architecture.
- Device –
Device has the properties of materials and manufacturability.