CSDS-101 CWRU Questions with Complete Solutions

First computers Correct Answer-Mechanical calculators- Perform simple additions and subtractions, operations performed on a crank, numbers stored on a rotor - mechanical switches: Konrad Zuse's Z1, electronically controlled, program was on a punch tape fed into the computer, had to be sequential, and manual. Z3 turned to eletronical, but otherwise still similar to Z1 - vacuum tubes used for logic circuitry - limited CPU and memory - very large and expensive - Most were very heavy, ranging from hundreds of pounds up to tons. Digital vs. Analog Data Correct Answer-Digital data is text, numbers, graphics, sound, and video that have been converted into discrete digits such as 0s and 1s. In contrast, analog data is represented using an infinite scale of values. - Analog faster but only as accurate as the transmitters and receivers - Digital only needs a small set of signals Radio uses analog data, TV used to use analog, but switched to digital, Computer manufactures use both, but are mostly digital. Electronic data - Analog: Amount of electricity sent over a wire, higher = bigger value, lower = smaller value. One signal may represent more than 1 value. Digital: on or off - binaries.