Computer Networks: Types, Topologies, and Protocols
1. What is a Computer Network?
A computer network is a set of computers connected to each other so they can share resources and exchange information.
2. Types of Networks According to Size
Local Area Networks (LANs)
LANs interconnect various computer devices, such as personal computers (PCs), workstations, printers, and other equipment. These devices are usually located in the same building or in buildings that are close together. LANs are private networks that allow users to share devices and programs,
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Photo and Video Editing
Photo and video editing are fundamental skills in electronics or digital media. These skills involve manipulating images or videos to improve their quality, enhance their visual appeal, and convey messages more effectively. In electronics, editing software like Adobe Photoshop or Adobe Premiere Pro allows users to adjust elements such as brightness, contrast, color balance, and sharpness. It also enables more advanced techniques like retouching, compositing, and adding special
Read MoreUnderstanding Structured Programming and C Structures
Structured Programming Principles
1. State two reasons why structured programming insists on one entry point and one exit point to any construct in a program such as for-next, while, a function, etc… (Week 3 – Computations: Logic)
Answer:
- Aim for one entry point and one exit point. You do all initialization at one spot – the entry point, and all code cleanup at one spot – the exit point.
- Breaks and continues are discouraged in loops. Returns in the middle of a function are discouraged.
Functions
Read MoreUnderstanding Bitcoin and Ethereum: A Deep Dive into Blockchain Technology
Bitcoin and Ethereum: A Deep Dive into Blockchain Technology
Bitcoin Transactions
The $1000 is broken up into many smaller amounts and mixed in a tumbler with funds from other people. Then, the person receives $1000 from the tumbler, but with no connection to the addresses used to provide the original funds.
Analogy: Suppose you have a large group of people who each put cash in a closed box. Then, each person takes out from the box the exact amount that he put in, although the specific coins and bills
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Random Scan Display vs. Raster Scan Display
Random Scan Display
- Uses a vector drawing method that directly draws lines and shapes on the screen.
- The resolution of random scan is higher than raster scan.
- It is costlier than raster scan.
- Any alteration is easy in comparison to raster scan.
- In random scan, interlacing is not used. e.g., Pen Plotter.
Raster Scan Display
- Uses an electron beam that scans the screen in a fixed pattern, line-by-line.
- The resolution of raster scan is lesser or lower than random scan.
Operating Systems Concepts: A Quiz
What is the main function of timer interrupts?
- They notify the system a given time interval has elapsed since the timer was set.
Delaying disk–or SSD–writes:
- May result in lost data if the system crashes.
Accessing the disk drive of your computer is approximately:
- 100,000 times slower than accessing its main memory.
- 100,000 times slower than accessing its main memory.
Which hardware mechanism allows a device to notify the CPU of an event?
- Interrupts
Memory protection is normally done through privileged instructions.
- False
A computer not having privileged