Quiz 6.2

DIRECTIONS: Read each question carefully. Then click on the dot next to the answer that most closely fits the question. Try to answer all questions on this quiz and when you are done, click on the grade me button at the bottom.

Coverage: Section 6.2

  1. Which of the following number is not a power of 2?
131,072
1024
16,777,213
2048

  1. How do we indicate that 10110101 is to be interpreted as a binary number, and not a decimal number?
We assume that people will interpret it as binary since there are nothing but 1s and 0s
we put a subscript of 2 on it, such as 101101012
we say in the accompanying text that it is meant to be binary

  1. What is the decimal equivalent of 101012?
10
20
21
37

  1. If a decimal number has n digits, how many bits will its binary equivalent have?
twice
ten times more
about three times more

  1. What is the binary equivalent of 17?
100012
10012
1000012
1010112

  1. What is 10000002 in decimal?
16
32
64
128

  1. If 217 is 131,072, what is 218?
262,144
524,288
67,108,864
don't ask me! All this math hurts my head!

  1. Why are binary numbers used inside computers?
because of an historical accident; Konrad Zuse decided they were best.
because they are really shorter than any other number representation
because the two binary digits can be easily modeled with 2 voltage levels
because mathematicians convinced the engineers they were better

  1. What is 1112 in decimal?
7
3
15
12

  1. How is 50 decomposed into powers of 2?
32+8+4+2+1
32+8+2
32+16+8+4+2+1
32+16+2