Computer Concepts

Computing

Quiz 1 :

Computers and Digital Basics

Quiz 1 :

Computers and Digital Basics

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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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Unicode
It is a technique which is used to encode data. It uses 16 bits to encode 65000 characters. It is used to encode any language.
UTF-8 and UTF-16 are the two most commonly used encoding scheme. For an ASCII characters UTF-8 uses only one byte.
In Russian Cyrillic alphabets using Unicode A is encode as 000001000010000.
Therefore, the appropriate word to fill in the blank is Unicode.

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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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Define the term convergence and provide examples of at least five devices that are converging.
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Convergence
Convergence can be defined as ability for various technological systems to evolve toward performing similar task. To describe the emerging telecommunication technologies, telecommunication convergence, network convergence terms are used.
Five handsets devices that are converging are as follow:
1. BlackBerry 8820 : This device was launched in July 2007 which is based on 2G network. It has an operating system named as BlackBerry OS with 32-bit Intel Xscale PXA272 312MHz. It gives the facility of SMS, MMS, Email and Instant Messaging.
2. BlackBerry curve 8320: This device was launched on September 2007 which is based on 2G network. It has a BlackBerry OS with 32-bit Intel XScale PXA272 312 MHz. It has facilities such as GPRS, EDGE, WLAN, Bluetooth and USB.
3. HTC Mogul: This device was launched on July 2007 by Sprint Nextel. Its cellular technology is CDMA20001X. It runs Window Mobile 6. It also includes Bluetooth, WLAN and EV-DO.
4. HTC Tilt 8925: This device runs Window Mobile Professional version 6. It has a 400MHz Qualcomm MSM 7200 processor with 256MB internal memory. Features include GPS, Bluetooth, USB, and WLAN.
5. IPhone: An iPhone is a smart phone which is marketed by Apple Inc. It runs Apple's IOS mobile operating system. The first generation of iPhone was released on 2007 of July. It is based on 2G, 3G, 4G and LTE network. Certain features such as visual voice mail, virtual keyboard, multi touch screen and user interface is also included.

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Provide three examples of digital devices and three examples of analog devices.
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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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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 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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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 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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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 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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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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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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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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Explain the technical difference between data and information.
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List the four phases of the digital revolution.
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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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Describe the difference between system software, an operating system, application software, and a computer program.
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