Answer to Question 1
ANSWER:
Output is data that has been processed into a useful form called information.
Text consists of characters that are used to create words, sentences, and paragraphs. A character is a letter, number, punctuation mark, or any other symbol that requires one byte of computer storage space.
Graphics are digital representations of nontext information, such as images, drawings, charts, pictures, and photographs. Displaying a series of still graphics creates an animation -- a graphic that has the illusion of motion.
Audio is any music, speech, or other sound that is stored and produced by the computer. Recall that sound waves, such as the human voice or music, are analog. To store such sounds, a computer converts them from a continuous analog signal into a digital format.
Video consists of photographic images that are played back at speeds that provide the appearance of full motion in real time. Software and Web sites often include videos to enhance understanding. Vodcasts and vblogs, for example, add a video component to the traditional podcast and blog.
Answer to Question 2
ANSWER:
Input is what you enter into the memory of a computer.
Data is a collection of unprocessed items. A computer manipulates and processes data into information that is useful, such as words, numbers, pictures, sounds, and so on. Although a single item of data should be referred to as a datum, the term data commonly is used and accepted as both the singular and plural form of the word.
A program is a series of instructions that tells a computer how to perform the tasks necessary to process data into information. Programs are kept on storage media such as a hard disk, CD, or DVD. Programs respond to commands issued by users.
A command is an instruction given to a computer program. Commands can be issued by typing keywords or pressing special keys on the keyboard. A keyword is a special word, phrase, or code that a program understands as an instruction. Many programs also allow you to issue commands by selecting graphical objects. Today, most programs have a graphical user interface that uses icons, buttons, and other graphical objects to issue commands.
Sometimes a program asks a question, such as Do you want to save the changes you made? that requires a user response. Based on your response, the program performs specific actions. For example, if you answer Yes to this question, the program saves your file to a storage medium.
