Understanding Programs, Software, and Systems
A program is a set of instructions written in a programming language for a computer to perform a particular task. A program is called into action to create or design programs. Programmers are the people who carry out this action.
Programming Languages
Low-Level Language
Used to write programs or system software because they provide a more direct shape.
High-Level Language
Used to write application programs and special-purpose programs, written in a way more like the language we speak, but in English.
Read MoreDistributed Systems: Concepts and Design
1. Distributed Systems: Definition and Consequences
A. Define Distributed Systems. List and explain the significant consequences of Distributed Systems.
Ans. A distributed system is defined as a system in which hardware or software components located at networked computers communicate and coordinate their actions solely by passing messages. This definition encompasses a wide range of systems where networked computers can be deployed, regardless of their physical separation, which can range from being
Read MoreSession Layer Services: Data Exchange & More
Services Offered: Level Meeting & Data Interchange
The primary purpose of the meeting is to facilitate data exchange. A session, functioning as a transport connection, follows three phases: establishment, use, and release. Primitives provided to the presentation layer for these phases closely resemble those provided to the session layer for managing transport links. Often, the session layer invokes transport primitives to ensure proper execution.
However, there are key differences between session
Read MoreUnderstanding Computer Fundamentals and Concepts
ROM (Read-Only Memory)
Read-Only Memory (ROM) is a type of computer memory that cannot be overwritten. The information stored inside is read-only and permanent. This information consists of predefined processes and is part of the hardware. ROM is non-volatile, meaning the data is retained even when the power is turned off.
RAM (Random Access Memory)
Random Access Memory (RAM) is a type of computer memory that can be overwritten. The information stored inside is loaded when there is a request for a
Read MoreComputer Peripherals: Types and Features
Advantages of LCD Monitors
What are the advantages of an LCD monitor?
LCD monitors are flat, which reduces glare and reflections. They are not bulky or heavy, and they do not use cathode rays. Therefore, they do not generate electromagnetic interference. They use digital technology, with little emission of radiation and a very low flash. They also consume less energy and make better use of visible space.
Keyboard Functions and Types
Checking for Key Presses
How do I check if a key is pressed on the keyboard?
Read MoreUnderstanding Computer Hardware & IT Concepts
Understanding Computer Hardware & IT Concepts
UPS (Uninterruptible Power Supply): A battery that automatically provides an electricity supply to allow the server to shut itself down properly if the main power supply fails.
Processor: The most important part of the computer. It processes data and controls the computer.
Memory:
- RAM (Random Access Memory): Holds the program instructions and the data that is being used by the processor.
- ROM (Read Only Memory): Holds the program instructions and settings