# Group Theory Essay

27780 Words Mar 19th, 2015 112 Pages
. Which of the following is true about 1 bit? a. Can represent decimal values 0 through 9 b. Can be used to represent one character in the lowercase English alphabet c. Represents one binary digit d. Represents four binary digits

Answer: C. The word bit means binary digit and represents a single binary number. As such, it can represent two states of information. To represent one number out of 10 decimal digits, or one character out of 26 in the English alphabet, multiple bits would be needed.

2. Which of the following terms means approximately 106 bytes? a. Terabyte b. Megabyte c. Gigabyte d. Kilobyte

Answer: B. Kilobyte means 210 bytes, which is approximately 103. Megabyte means 220 bytes, which is approximately 106. Gigabyte
c. The smallest unit of data that RAM supplies back to the CPU is 1 bit. d. The CPU must first find the file in the file system before reading the data.

Answer: A. The CPU can read and write RAM 1 byte (or more) at a time. To read 1 byte, the CPU tells the RAM the address in RAM that the CPU wants to read. The RAM supplies the value of the byte in RAM that has the supplied address.

6. A user has opened a word processor, typed the numbers 123456789, and stored the document as a file called report1. Which of the following deter- mines, in part, what bits the computer stores in the file to represent the text typed into the report? a. Keyboard map b. Pixel grid c. Character set d. The binary equivalent of decimal 123456789

Answer: C. A word processor, or any application working with text, uses a standardized character set. The character set maps the list of text characters to a corresponding set of binary codes. The word processor stores the binary code for each text character.

7. A user has opened a calculator application, typed the numbers 123456789, and then done some math problem using this number. Which of the following determines, in part, what bits the computer stores in RAM to represent the number 123456789? a. Keyboard map b. Pixel grid c. Character set d. The binary equivalent of decimal 123456789

Answer: D. Unsigned integers—numbers from 0 and above—can

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