Yasser

Cabrera

FIRST SET OF QUESTIONS FOR WEB PAGE

• What is the highest digit used in "octal" numbers?
  • Ans/ 7
• What is the highest digit used in "hexadecimal" numbers?
  • Ans/ 15
• What is the highest digit used in "binary" numbers?
  • Ans/ 1
• What is the highest digit used in "decimal" numbers?
  • Ans/ 9
• What is the value of the highest digit in the base 5 number system?
  • Ans/ 4
• The rightmost digit of a number represents its value multiplied by the base raised to the ____2nd____ power.

• Convert the binary number 11011011 to decimal.
  • Ans/ 219
• Convert the octal number 476 to binary.
  • Ans/ 100111110
• Convert the hexadecimal number FF to decimal.
  • Ans/ 255
• Convert the decimal number 255 to hexadecimal.
  • Ans/ FF

SECOND SET OF QUESTIONS FOR WEB PAGE

1. Compute the ONES-complement of the following binary: 11011011 (Same as above.)
   • Ans/ 00100100
2. What ASCII character is represented by this number (ONES-complement of 11011011)?
   • Ans/ $
3. Perform the following binary addition: 11001 + 1110011
   • Ans/ 10001100
4. Perform the following octal addition: 665 + 771
   • Ans/ 1656
5. Perform the following hexadecimal addition: ABC + ABC
   • Ans/ 1578

6. Signed-magnitude has how many representations of zero?
   • Ans/ Two (+0 and -0)
7. How is the decimal value -273 represented in twos-complement ? (Show the bits.)
   • Ans/ 1111 1110 1110 1111
8. What negative number is represented in twos-complement by a (16-bit) word containing the following bits:         1111 0000 1111 0000
   • Ans/ -3,856
9. There are 3,143 counties in the USA.
   How many bits are needed to represent each county with different code?
   • Ans/ 12 Bits
10. How is "information" different from "data"?
    • Ans/ Data are plain facts. When data are processed, organized, structured or presented in a given context so as to make them useful, they are called Information.

11. Why do some 8-bit memory boards have nine sets of bits?
    • Ans/ They use it as a floating point
12. What is "SECDED"?
    • ANS/ Single Error Correction, Double Error Detection

13. The set of wires through which data travels between components of a computer is called a _Bus__.
14. _Machine-Language______ is the collection of programs that provide the instructions that a computer carries out.
15. The ____ALU___________ performs basic operations in the central processing unit such as adding and subtracting, plus logical operations such as AND and OR.
    
    

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