QUIZ 3

1. Describe the four categories of output.
2. The characteristics of LCD monitors, LCD screens, plasma monitors, and HDTVs.
3. What are the components inside the systems units.
4. The components of a processor and how they complete a machine cycle.
5. Define a bit and describe how a series of bits represents data.
6. Identify the categories of application software.
7. Identify the key features of widely used business programs.
8. What are the advantages of using application software on the Web.
9. History of the Internet.
10. What are diferent storage devices.

ANSWERS:

1. Text consists of characters (letters, numbers, punctuation marks, or any other symbol requiring one byte of computer storage space) that are used to create words, sentences, and paragraphs. Graphics are digital representations of non-text information such as drawings, charts, photographs, and animation (a series of still images in rapid sequence that gives the illusion of motion). Audio is music, speech, or any other sound. Video consists of images played back at speeds to provide the appearance of full motion.

2. Uses liquid crystal display, have a small footprint,  Mobile devices that contain, LCD displays includes Notebook computer, Tablet, PC, PDA, and Smart Phone. Plasma monitor displays image by applying voltage to layer of gas. Larger screen size and higher display quality than LCD, but are more expensive

3. The System Unit - Box-like case that contains computer’s electronic components, sometimes called the chassis the components are: Processor, Memory module, Expansion card, Sound card Modem card,Video card, Network interface card, Ports and Connectors Drive bays and Power supply.

4. The components of processor are the Control unit which direct and coordinates operations in computer and Arithmetic Logic unit which performs arithmetic, comparisons and logical operations. The four operations of the CPU that comprise a machine cycle: First, Fetch - obtain program instruction or data item from memory. Second, Decode - translate instruction into command. Third, Execute - carry out command and Fourth, Store - write result to memory.


5. A Bit is a short for Binary Digits. Most computers are digital, recognize only two discrete states: ON and OFF. Use Number system with two unique digits: 0 and 1. Eight bits grouped together as a unit. Provides enough different combinations of 0s and 1s to represent 256 individual characters. There are three popular coding system to represent data the ASCII, EBCDIC and Unicode and this how a letter converted to binary from and back. Step 1, The user presses the capital letter "D" on the keyboard. Step 2, an electronic signal for the capital letter "D" is sent to the system unit. Step 3, the signal for the capital letter "D" is converted to its ASCII binary code (01000100) and is stored in memory for processing. Step 4, after processing, the binary code for the capital letter "D" is converted to an image, and displayed on the output device.

6. Four categories of application software; Business software,assist people in becoming more effective and efficient while performing their daily business activities example word processors, accounting, note taking, spreadsheet, database, presentation graphics. Multimedia and Graphics applications, sophisticated software that allows users to work with graphics and multimedia includes computer-aided design (CAD), desktop publishing, paint/image editing, video and audio editing, animation, multimedia authoring and web page authoring. Communication applications this includes E-mail, Web browser, Newsgroup/Message board, Chat room, Instant messaging and Video Conferencing and telephone calls. Home, Personal and Educational application, software designed specifically for home, personal and education use, relatively inexpensive maybe scalded down versions of business software.


7. Word processor program that provides special capabilities beyond that of a text editor such as Wordpad, screen the user from structural or printer formatting mark-up, uses typing documents and letters, simple desktop publishing, etc example Microsoft word, Corel and Word perfect. Spreadsheet program that stimulates a physical spreadsheet by capturing, displaying, and manipulating data arranged in rows and columns. Ability to portray data relationships graphically and most are multidimensional-one spreadsheet can be linked to another; a change in one spreadsheet automatically affects the others. Allows users to perform calculations on data uses includes balancing accounts, inventory, grade record keeping, etc example Lotus 1-2-3 and Microsoft Excel. Presentation graphics, program used to create sequences o text and images that tell a story or help support a speech or public presentation of information. Can be divided into business presentation software and more general multimedia authoring tools, with some products having characteristics of both example o this are Microsoft powerpoint, Lotus and Freelance Graphics. Database Management is a collection of data organized in a manner that allows access, retrieval and use of the data. Database software allows users to create, access and manage a database, able to sort, delete, edit, insert and retrieve data stored in a database also able to create reports and forms.Users run queries to retrieve data it includes storing customer information, inventory examples are Microsoft Access, Oracle, MySQL, Corel Paradox. Note taking enables users to entry typed text, handwritten comments, drawings or sketches anywhere on a page, and then save the page as part of a notebook. Can also include audio recordings, notes can be then organized, shared, reused-allows searching for specific text. Desktop/laptop users enter via keyboard or microphone, Tablets PC users enters via digital pen incorporates many features in word processing-spell check; inserting audio and video clips; changing font colours, sizes and types examples are Microsoft Office OneNote 2003.