<p> UNIT 2: TEST Question 1: All functions of a computer are based upon the use and manipulation of numbers. Which number system is most native to a computer?</p><p>A. binary</p><p>B. decimal</p><p>C. hexadecimal </p><p>D. octal Question 2: What is the decimal conversion of the binary number 101010? A. 221 B. 193 C. 217 D. 192</p><p>Question 3: Which binary number represents the decimal number 133? A. 10001011 B. 11000001 C. 10000111 D. 10000101</p><p>Question 4: What is the decimal value of the binary number 11111111? A. 0 B. 64 C. 192 D. 255</p><p>Question 5: What is a bit? A. The section of a network that is bounded by bridges, routers, or switches. B. A binary digit used in the binary number system, either 0 or 1. C. The interface on an internet working device, such as a router. D. The network areas within which data packets that have collided are Worksheet Activity: Working With Binary </p><p>The binary system uses zero and one to represent whether a card is face up or not. 0 shows that a card is hidden, and 1 means that you can see the dots. For example: </p><p> propagated. Question 6: Which of the following phrases best describes the decimal numbering system? A. It is also called the Base 100 Number System. B. It is based on powers of 1. C. It uses the 10 symbols 0-9. D. It is the same as the ASCII numbering system.</p><p>Question 7: What is the decimal number 151 in binary? A. 10010111 B. 10010110 C. 10101011 D.Can 10010011 you work out what 10101 is? What about 11111? Question 8: What is the binary number 11011010 in decimal? A. What218 day of the month were you born? Write it in binary. Find out what your B. 202 C.friend’s 222 birthdays are in binary. D. 186</p><p>Question 9: Which numbering system is based on powers of 10?</p><p>A. ten fingers B. hexadecimal TryC. tbinaryo work out these coded numbers: D. decimal</p><p>Question 10: Which order is correct for 2n for converting binary code?</p><p>A. C. </p><p>B. D.</p><p>Extra for Experts: Using a set of rods of length 1, 2, 4, 8 and 16 units show how you can make any length up to 31 units. Or you could surprise an adult and show them how they only need a balance scale and a few weights to be able to weigh those heavy things like suitcases or boxes! </p><p>Photocopiable for classroom use only. 7 © 2002 Computer Science Unplugged (www.unplugged.canterbury.ac.nz)  </p><p>Question 11: What is the first step in the problem solving process? A. Carry out a plan B. Review and reflect C. Understand the problem D. Discuss the answer without needing to solve the problem</p><p>Question 12: What step in the problem solving process do you use pictures, graphs, charts, systematic lists, objects, or act out a solution to help you device a plan? A. Sampling process B. Make a plan to solve the problem C. Reflections D. Carry out the plan</p><p>Question 13: What step in the problem solving process do you follow a plan? A. Make a plan to solve the problem B. Carry out the plan C. Solving the problem D. Guessing an answer</p><p>Question 14: What is the final step of the problem solving process? A. Jump for joy, we figured it out B. Develop a new plan C. Review and reflect on how the problem was solved D. Find the pattern</p><p>Question 15 – 19: Put the number of breaks in order with the number of pieces. 15. 22 A. 31 AA. 22 16. 23 B. 21 BB. 26 17. 25 C. 23 CC. 27 18. 26 D. 30 DD. 29 19. 30 E. 24 EE. 30</p>