A key is a unique identifier that should be created and used when designing a database for each type of entity, in order to store and retrieve data accurately. Select one: a. foreign b. super c. primary d. candidate e. surrogate

Use the keyword strategy to remember the meaning of the following word. the meaning for the word has been provided. write your keyword and describe the picture you would create in your mind. centurion: a commander in the army of ancient rome. keyword: picture:

List a few alternative options and input and output over the standerd keyboard and monitor. explain their functioning in details.

Why were most movies from the late 1890s until the early 1930s only filmed in black and white? there were only a few people who could afford the technology to produce color motion pictures back then. audiences did not want color motion pictures until later. the film used to make color motion pictures often overheated, which was a safety hazard, so it was generally not allowed. color films had to be hand-colored, frame by frame.