Exercise Chapter 10 - Discovering Computer 2011 - Living in Digital World

Martin - 1601213690

01 PBT

True / False

1.   True
2.   True
3.   False
4.   True
5.   False
6.   False
7.   True
8.   True
9.   False
10. True


Multiple Choice

1. B ( Timely )
2. A ( composite key )
3. D ( File maintenance )
4. B ( determines whether a number is within a specified range )
5. A ( less complexity )
6. B ( data dictionary )
7. B ( principle of least privilege )
8. A ( decides on the proper placement of fields )


Matching

1.   e
2.   g
3.   c
4.   b
5.   j
6.   a
7.   i
8.  d
9.   h
10. f


Short Answer

1. * Validation is the process of comparing data with a set of rules or values to find out if the data is correct.
    * Five types of validity checks are alphabetic checks, numeric checks, range checks, consistency checks, and completeness checks.

2. * Data redundancy a weakness of file processing systems because data redundancy means same information is duplicated in several files. This makes data redundancy.
    * Isolated data a weakness of file processing systems because data are scattered in various files, and the files may be in different format, writing new application program to retrieve data is difficult.

3. * Database approach is a approach whereby a pool of related data is shared by multiple application programs, offers significant advantages over traditional file-based approach.
    * Reduced Data Redundancy => most data items are stored in only one file, which greatly reduces duplicate data.
       Improved Data Integrity => when users modify data in the database, they make changes to one file instead of multiple files.
       Shared Data => the data in a database environment belongs to and is shared, usually over a network, by the entire organization.
       Easier Access => the database approach allows nontechnical users to access and maintain data, providing they have the necessary privileges.
       Reduced Development Time => it often is easier the faster to develop programs that use the database approach.

4. * Using a Simple Query Wizard for a query that searches for and lists students in an school or college.
    * Query By Example ( QBE ) is a database query language that has a graphical user interface to assist users with retrieving data.

5. * Object- oriented databases have several advantages, they can store more types of data, access data faster, and allow programmers to reuse objects.
    * A multimedia database stores images, audio clips, and/or video clips. A groupware database stores documents such as schedules, calendars, manuals, memos, and reports. A computer-aided design ( CAD ) database stores data about engineering, architectural, and scientific designs. A hypertext database contains text links to other types of documents.

Exercise Chapter 9 - Discovering Computer 2011 - Living in Digital World

Martin - 1601213690

01 PBT

True / False

1.   True
2.   False
3.   True
4.   False
5.   True
6.   True
7.   False
8.   True
9.   False
10. True
11. True


Multiple Choice

1. C ( visual voice mail )
2. C ( a Web conference )
3. C ( provides for storage and management of a company's documents )
4. D ( mashup )
5. B ( Hubs and switches )
6. A ( RFID )
7. D ( Coaxial cable )
8. B ( Mobile TV )


Matching

1.   e
2.   j
3.   h
4.   d
5.   f
6.   a
7.   g
8.   b
9.   c
10. i


Short Answer

1. * Test Messaging is a mobile device called SMS ( Short Message Service ), capability allows users to send and receive short text message, typically fewer than 300 characters, usually on a phone or other mobile device.
    * Mobile to mobile, mobile to E-mail, mobile to provider.

2. * It consist of one or more earth-based receivers that accept and analyze signals sent by satellites in order to determine the receiver's geographic location.
    * GPS can be uses to assist people with determining where they are located, creating a map, ascertaining the best road between two points, locating a lost person or stolen object, determining altitude, and calculating speed, give information about nearby points of interest. In nowadays, many mobile devices such as as smart phone use GPS to provide drivers with directions or other information, and also GPS receiver work in conjunction with a cellular wireless network. Parents, for example, can locate a child's whereabouts through a cell phone equipped with a GPS receiver.

3. * Local Area Network is a network that connects computers and devices in a limited geographical area such as home, school, office, or closely positioned group of buildings.
    * MAN ( Metropolitan Area Network ) is a high speed network that connects local area networks in a metropolitan area such as city or town and handles the bulk of communications activity across the region.
       WAN ( Wide Area Network ) is a network that covers a large geographic area like a city, country, or world, using a communications channel, that combines many type of media such as telephone lines, cables, and radio waves.
       Wireless LAN is a network that use no physical wires.

4. * Network Topology refers to the layout of the computers and devices in a communications network.
    * ISDN lines, DSL, FTTP, T-Carrier lines, and ATM.

5. * ISDN modem, DSL modem, Cable modem :
     - ISDN modem => sends digital data and information from a computer to an ISDN line and receives digital data and information from a ISDN line.
     - DSL modem => sends digital data and information from a computer to a DSL line and receives digital data and information from a DSL line.
     - Cable modem => a digital modem that sends and receives digital data over the cable television network.

Exercise Chapter 8 - Discovering Computer 2011 - Living in Digital World

Martin - 1601213690

01 PBT

True / False

1.   False
2.   False
3.   True
4.   True
5.   True
6.   True
7.   True
8.   True
9.   False
10. True


Multiple Choice

1. B ( CMOS )
2. B ( Windows ReadyBoost )
3. C ( gadget )
4. A ( index )
5. C ( contiguous sectors, which speeds )
6. D ( Windows Explorer )
7. C ( Adware )
8. B ( Web filter )


Matching

1.   f
2.   c
3.   g
4.   d
5.   e
6.   h
7.   a
8.   b
9.   i
10. j


Short Answer

1. * Turning on a computer that has been powered off completely, It's performing a cold boot. A warm boot, by contrast, is the process of using the operating system to restart a computer.
    * The kernel is memory resident, which means it remains in memory while the computer is running. Other parts of the operating system are nonresident, these instructions remain on a storage medium until they are needed.

2. * A user interface controls how to enter data and instructions and how information is displayed on the screen.
    * With a Graphical User Interface ( GUI ), users interact with menus and visual images such as buttons and other graphical objects to issue commands. While configure devices, manage system resources, and troubleshoot network connections, network administrators and other advanced users work with a command-line interface.

3. * With Windows Update, users can download and install operating system and utility updates. It also can become a fixer of program bugs or errors, enhancements to security, modifications to device drivers, access to new or expanded components such as desktop themes, or even update applications software in the computer.
    * Many software makers provide a free downloadable update to users who have registered and/or activated software.

4. * During the back-up process, the utility monitors progress and alerts users of an optional if users want to add another disc or not.
    * The purpose of a restore utility is to reserve the backup process and return backed up files to their original form.

5. * Four embedded operating systems :
     - Windows CE => an operating system developed by Microsoft for embedded system.
Optimized of devices that have minimal storage.
     - iOS => a mobile operating system developed and distributed by Apple Inc.
     - Palm OS => a mobile operating system initially developed by Palm, Inc., for personal digital assistants ( PDAs ) in 1996.
     - MS-DOS => an operating system for x86-based personal computers. It was the most commonly used member of the DOS family of operating system.
     - Inferno => a distributed operating system started at Bell Labs, but is now developed and maintained by Vita Nuova Holdings as free software.

    * The uses :
     - Windows CE => Windows CE kernel may run in under a megabyte of memory. Devices are often configured without disk storage, and may be configured as a closed system that does not allow for end-user extension.
     - iOS => extended to support other Apple devices such as the iPad and Apple TV.
     - Palm OS => designed for ease of use with a touchscreen-based graphical user interface.
     - MS-DOS => the most commonly used member of the DOS family of operating systems, and was the main operating system for IBM PC compatible personal computers during the 1980s to the mid 1990s.
     - Inferno => based on the experience gained with Plan 9 from Bell Labs, and the further research of Bell Labs into operating systems, languages, on-the-fly compilers, graphics, security, networking and portability.

Exercise Chapter 7 - Discovering Computer 2011 - Living in Digital World

Martin - 1601213690

01 PBT

True / False

1.   True
2.   False
3.   False
4.   False
5.   False
6.   True
7.   False
8.   True
9.   False
10. True
11. False
12. False
13. True


Multiple Choice

1. B ( Transfer rate )
2. C ( longitudinal recording )
3. D ( RAID )
4. D ( all of the above )
5. A ( optical disc )
6. C ( LightScribe )
7. B ( tape library )
8. B ( magnetic stripe )


Matching

1.   h
2.   c
3.   a
4.   e
5.   f
6.   j
7.   d
8.   b
9.   i
10. g


Short Answer

1. * A network attached storage device is a server connected to a network with the sole purpose of providing storage.
    * Six terabytes or more.

2. * Advantages of SAS over parallel SCSI :
       thinner, longer cables, reduced interference, less expensive, support for many more connected devices at once and faster speeds.
    * SAS interfaces support connections to optical disc drives, printers, scanners, digital cameras and other devices.

3. * Multisession disc means we can write the disc in parts.
    * Many people use archive discs and picture discs to preserver their photos.

4. * People use memory cards because memory cards enable mobile users easily to transport digital photos, musics or files to and from mobile devices and computers or other devices.
    * Common types memory cards like microSD, CompactFlash ( CF ), Secure Digital ( SD ), Secure Digital High Capacity ( SDHC ), micro SDHC.
        - MicroSD used on smart phones, portable media players, handheld game consoles, handheld navigation devices.
        - CompactFlash ( CF ) used on digital cameras, smart phones, PDAs, photo printers, portable media players, desktop computers and more.
        - Secure Digital High Capacity ( SDHC ) used on digital cameras.
        - Micro SDHC used on smart phones, portable media players, handheld game consoles and more.

5. * The difference is the size, Microfiche is a small sheet of film and usually about 4x6 inches, Microfilm is a 100-215 foot roll of film.
    * Libraries use these media to store back issues of newspapers, magazines, and genealogy records. Some large organizations use microfilm and microfiche to archive inactive files. Some banks use them to store transactions and canceled checks. The U.S. Armies use them to store personal records.

Exercise Chapter 6 - Discovering Computer 2011 - Living in Digital World

Martin - 1601213690

01 PBT

True / False

1.   True
2.   True
3.   False
4.   True
5.   False
6.   False
7.   True
8.   False
9.   False
10. True
11. False
12. False
13. False


Multiple Choice

1. D ( letters, reports, and e-mail messages )
2. B ( OLED )
3. A ( DisplayPort )
4. D ( diagonal )
5. D ( dots per inch (dpi) )
6. B ( if the multifunction peripheral breaks down, all functions are lost )
7. C ( interactive whiteboard )
8. D ( Force feedback )


Matching

1.   d
2.   j
3.   g
4.   h
5.   f
6.   c
7.   a
8.   e
9.   b
10. i


Short Answer

1. * A higher resolution uses a greater number of pixels and thus provides a smoother, sharper, and clearer image. As you increase the resolution, however, some items on the screen appear smaller.
    * With LCD monitors and screens, resolution generally is proportional to the size of the device.

2. * HDTV is working with digital broadcast signals, transmitting digital sound, supporting wide screens, and providing resolutions up to 1920 3 1080 pixels.
    * Users plug one end of a cable in the game console and the other end in the video port on the television.

3. * With Bluetooth printing, a computer or other device transmits output to a printer via radio waves.
    * With Infrared printing, a printer communicates with a computer or other device using infrared light waves.

4. * Ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper.
    * Professionals require high image quality, such as medical labs, photography studios, and security identification systems. These high-end printers cost thousands of dollars and print images in a wide range of sizes. Most dye-sublimation printers for the home or small business user, by contrast, typically print images in only one or two sizes and are much slower than their professional counterparts.

5. * Surround sound system may contain speakers and sub-woofer.
    * Audio resolution is the number of bytes that represent sound in a given time, stated as a bit rate such as 8-bit, 16-bit, or even 24-bit. The three examples of the audio resolution is AM radio ( 8 bit ), optical disc-quality sound ( 16-bit ) and high quality digital audio editing ( 24 bit ).

Exercise Chapter 5 - Discovering Computer 2011 - Living in Digital World

Martin - 1601213690

01 PBT

True / False

1.   True
2.   True
3.   False
4.   True
5.   False
6.   False
7.   False
8.   False
9.   False
10. True
11. True
12. True


Multiple Choice

1. C ( ergonomic keyboard )
2. A ( predictive text input )
3. B ( multi-touch )
4. C ( graphics tables )
5. D ( Voice recognition )
6. C ( Music production software )
7. C ( radio signals )
8. C ( gesture recognition )


Matching

1.   b
2.   g
3.   d
4.   j
5.   e
6.   a
7.   h
8.   f
9.   i
10. c


Short Answer

1. * Optical mouse, laser mouse, air mouse - Optical mouse uses devices that emit the sense light to detect the mouse's movement. Laser mouse uses laser to detect the mouse's movement. Air mouse is a motion-sensing mouse that allows you to control objects, media players, and slide shows by moving the mouse in predetermined direction in the air.

2. * Point, click, right-click, double-click, triple-click - Point is the action of moving the mouse until the pointer on the desktop is positioned on the item of choice. Click is pressing and release the primary mouse button which usually is the left mouse button. Right click is pressing and release the secondary mouse button which usually is the right mouse button. Double-click is the action of quickly pressing and release the left mouse button twice without moving the mouse. Triple-click is the action of quickly pressing and release the left mouse button three times without moving the mouse.

3. * OCR is a technology that involves reading typewritten, computer-printed, or hand-printed characters from ordinary documents and translating the images into a form that the computer can process.
    * OMR is a technology that reads hand-drawn marks such as small circles or rectangles.

4. * The most widely used biometric device nowadays is a fingerprint reader.
    * A fingerprint reader or scanner captures curves and indentations of fingerprint. The reader can be set up to perform different functions for different fingers, for example, one finger starts a program and another finger shuts down the computer.

5. * The Americans with Disabilities Act (ADA) requires any company with 15 or more employees to make reasonable attempts to accommodate the need of physically challenged workers.
    * Computers with gesture recognition capability have the potential to recognize sign language, read lips, track facial movements, or follow eye gazes. For paralyzed or speech impaired individuals, a doctor will implant a computerized device into the brain.

Exercise Chapter 4 - Discovering Computer 2011 - Living in Digital World

Martin - 1601213690

01 PBT

True / False

1.   True
2.   False
3.   True
4.   False
5.   False
6.   True
7.   True
8.   False
9.   False
10. True
11. False
12. False


Multiple Choice

1. B ( central processing unit (CPU) )
2. A ( control unit )
3. B ( registers )
4. B ( massively parallel processing )
5. C ( firmware )
6. B ( port replicator )
7. A ( docking station )
8. D ( front side bus )


Matching

1.   h
2.   a
3.   f
4.   b
5.   d
6.   e
7.   g
8.   c
9.   i
10. j


Short Answer

1. * Slate and Convertible - In slate design, the system unit is behind the display. In convertible design, the display attaches to the system unit with a swivel-type hinge, which enables a user to rotate the display and fold it down over the keyboard to look like a slate Tablet PC.

2. * Motherboard is the main circuit board of whole system unit.
    * Computer chip is a small piece of semiconducting material, usually silicon, on which integrated circuits are etched.

3. * Four basic operations in machine cycle : comparing, decoding, executing, pipelining.
    * Register function include storing the location from where an instruction was fetched, storing the results of a calculation.

4. * Many computers, perpherals, smart phones, PDAs, cars, and other consumer electronics are Bluetooth-enabled.
    * The three ways to use Bluetooth is using Bluetooth-enabled device or purchase Bluetooth wireless port adapter or Bluetooth PC Cards and Express Card modules for traditional notebook computers and Tablet PCs or Bluetooth cards for smart phones and PDAs.

5. * Compressed air is used to blow away dirt from any openings on the case, such as drivers, slots, ports, and fan vents.
    * Before cleaning the computer, turn it off, and if necessary, unplug it from the electrical outlet, remove the battery, and disconnect all cables from the ports.

Exercise Chapter 3 - Discovering Computer 2011 - Living in a Digital World

Martin - 1601213690

01 PBT

True / False

1.   False
2.   False
3.   False
4.   True
5.   True
6.   True
7.   True
8.   False
9.   True
10. False
11. True
12. False


Multiple Choice

1. A ( Packaged Software )
2. A ( A software suite )
3. B ( Project management software )
4. C ( Document management )
5. C ( Personal DTP software )
6. B ( photo management software )
7. C ( newsgroup/message board )
8. B ( Online help )


Matching

1.   i
2.   e
3.   j
4.   b
5.   d
6.   l
7.   a
8.   g
9.   k
10. c


Short Answer

1. * Utility programs protect a computer against malicious software and unauthorized instrusions, manage files and disks, compress files, play media files, and burn optical discs.
    * Malware is a program that acts without a user's knowledge and deliberately alters the computer's operations.

2. * Presentation software is a software that provide a variety of predefined presentation formats, a variety of layouts for each individual slide, provide slide-timing where the slide change itself to the next slide automatically after a set of time, gives a variety of feature including an outline of text from each slide, audience handouts that show completed slides, and speaker notes for each slide, also enables users to work with multiple monitors.
    * Images, video and audio are some types of media might a person use to enhance a presentation.

3. * Travel and Mapping software enables users to view maps, determine route directions, and locate points of interest. This software also provides driving directions when a user enters a starting and destination point. Most programs also allow us to download construction reports and calculate mileage, time, and expenses.
    * Examples of reference software : encyclopedia, dictionary, health/medical guides.

4. * Computer-based training ( CBT ) is a type of education which students learn by using and completing exercises with instructional software.
    * Few examples of CBT usage : pilots use CBT aircraft simulations to train how to fly the ships in various conditions and environments.

5. * There are many Web sites utilize Web-based training in business, industry, schools, and many more.
    * Some ways that e-learning enhances communications include video conference, email, blogs, wikis, instant messenger and many more.