Sean

August

• 1.What is the highest digit used in "octal" numbers? ans.7


• 2.What is the highest digit used in "hexadecimal" numbers? ans.F


• 3. What is the highest digit usedin "binary" numbers? ans.1


• 4. What is the highest digit used in "decimal" numbers? ans.9


• 5. What is the value of the highest didgit in the base 5 number system? ans.4


• 6. The rightmost digit of a number represents its value multiplied by the base raised to ans.Exponent power.


• 7. Convert the binary number 11011011 to decimal. ans. 219


• 8. Convert the octal number 476 to binary. ans. 10111110


• 9. Convert the hexadecimal number FF to decimal. ans. 255


• 10. Convert the decimal number 255 to hexadecimal. ans. FF

1. Compute the ONES-complement of the following binary: 11011011 ans. 127


2. What ASCII character is represented by this number(ONES-complement of 11011011)? ans.del


3. Perform the following binary addition: 11001 + 1110011 ans. 10001101
4. Perform the following octal addition: 665 + 771 ans. 1656
5. Perform the following hexadecimal addition: ABC + ABC ans. 1689
6. Signed-magnitude has how many representations of zero? ans. one
7. How is the decimal value -273 represented in twos-complement by a twos-complement (show the bits.)


8. What negative number is represented in twos-complement by a (16-bit) word containing the following bits: 1111 0000 1111 0000
9. There are 3,143 counties in the USA. How many bits are needed to represent each county with a different code? ans. 12 bits
10. How is "information" different from "data"? ans. Information is something we input and data is output or stored information.
11. Why do some 8-bit memory boards have nine sets of bits? ans. One bit is used for parity.
12. What is "SECDED"? ans. Single-error-correctting and double-error- correcting. Used in RAM.
13. The set of wires through which data travels between components of a computer is called a ans. Bus
14. ans. "OS" is the collection of programs that provide the instructions that a computer carries out.
15. The ans. "ALU" performs basic operations in the central processing unit such as adding and subtracting, plus logical operations such as AND and OR.