Computer Concepts

Computing

Quiz 1 :

Computers and Digital Basics

Quiz 1 :

Computers and Digital Basics

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List the ASCII representation for B and the binary representation for 18; draw a stepped waveform showing a digital sound; and draw a diagram showing how color is represented in a graphic.
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ASCII and binary representation, stepped waveform and color representation in graphics
ASCII representation
ASCII representation for B in terms of is as follow:
1. Decimal: 066
2. Octal: 102
3. Hexadecimal: 042
4. Binary: 01000010
Binary representation
Binary representation of 18 is 00010010
Steeped waveform
The stepped waveform diagram of a digital sound is represented as:
On the x-axis represents the time and y- axis represents the signal strength. When wave comes on its axis again, the duration of time is known as one time period.
img Representing color in graphics
RGB in graphics is a way of specifying color in graphics and a powerful tool for viewing color. Graphics algorithm manipulate RGB color and the images produced by the graphics algorithm are encoded as RGB pixels and display on the device that render these pixels by emitting RGB light
img

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Explain the technical difference between data and information.
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Data and Information
The data can be defined as the symbols or characteristics that represent people, events, things and ideas. Data can be in the any form such as name, number, and address and can be musical composition. Whereas the information can be defined as the format in which data is represented, the format should be such that any person can understand the format and can use it.
Difference between data and information
Differences between data and information are given as:
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Describe at least two social, political, and economic effects of the digital revolution.
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Effects of digital revolution
With the introduction of digital revolution, the mechanical and electronic technology is replaced by digital technology. The digital revolution was started from 1950s to 1970s with the adoption of digital computer and digital devices keeping that continues to the present day.
In the middle of this revolution, there is the mass production of digital logic circuits and its derived technologies such as mobile, computer and fax machine.
Social effects
1. Inter connectedness: With the development of digital revolution, now people are constantly connected with each other with the help of digital devices.
2. Easier communication: Effects of digital revolution makes communication easier. Now people from different countries can contact everywhere in the world.
Exposure of information: Now it become easier to get and sent information about whatever you want with the help of digital devices.
Economic effects
1. Increased in productivity: With the positive effects of digital revolution, there is an increased in the productivity, which implies the development in economy of people.
2. Performance of business: performance in business has also been increased. Everyone wants to develop more and more which results in improvement in economic effect.
Political effect
1. Use of internet in their election program: Politician use internet in their election program in order to promote their party and organize various election campaign.
2. Means of business and economy: Digital revolution also become a means of business and economy. Now people can do business and economic activities with the help of digital devices

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You're visiting an antique shop and notice a collection of old-fashioned radios. They actually feature a dial for tuning in different radio stations. You immediately recognize this as a(n) img device because it deals with an infinite scale of values, rather than discrete values.
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Your bank is giving customers the choice of using a fourdigit PIN or a password that can contain up to ten letters and numbers. The img is more secure, so that's what you decide to use.
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You receive an e-mail message asking you to join a circle of friends. You assume that the message was generated in conjunction with an online img network, such as Facebook, and if you become a member, you will be able to socialize online.
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List the four phases of the digital revolution.
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While attending a meeting at work, you hear one of the executives wondering if "unit code" would be helpful. After a moment of puzzlement, you realize that the executive really meant img , and that it would allow your company software to be translated into the Cyrillic alphabet used by the Russian language. img
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You have a storage device that offers 2 GB of storage space. It is currently empty. Your friend wants to give you a large digital photo that's 16 MB. Will it fit on your storage device? img
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Suppose that you walk into an office and see the devices pictured to the right. You would probably assume that they are the screen, keyboard, and mouse for a(n) img computer, workstation, or server.
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Define the term microcontroller and provide three examples of devices in which microcontrollers are found.
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Describe the difference between system software, an operating system, application software, and a computer program.
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Define the term convergence and provide examples of at least five devices that are converging.
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Draw a diagram to explain how a computer makes use of input, processing, storage, memory, output, and stored programs.
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You're planning a trip to Finland, but when you access the hotel site, the prices are listed in euros. To find the price in U.S. dollars, you access a currency converter from your portable phone. That's an example of img computing, representative of the fourth phase of the digital revolution.
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Provide three examples of digital devices and three examples of analog devices.
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List the characteristics that handheld computers and dedicated handheld devices have in common with personal computers, and list factors by which they differ.
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You need to select a password for your online PayPal account. Which of the following passwords would be the LEAST secure: jeff683, hddtmrutc, gargantuan, fanhotshot, bb#ii22jeffry, or high348? img
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List and define all the chapter terms, such as bit , byte , and kibibyte , that pertain to quantifying data.
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List, briefly describe, and rank (in terms of computing capacity) the characteristics of each computer category described in Section B of this chapter.
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