1) What is denary a) Letter system  b) number system of 0-9 c) number system with only 0 and 1 2) What base do we count in a) base 1 b) base 2 c) base 10 3) What numbers represent binary a) 0 and 2 b) 0 and 1 c) 1 and 2 4) Why do computers use binary a) for storage b) to store data c) to store words 5) What are the place values in binary? a) 1, 2 ,4 ,8,16,24,48,64,128 b) 1,2,4,8,16,32,64,128 c) 0, 2,4,8,12,32,64,128 6) How do you add 11110001+00001110 a) 69 b) 255 c) 138 d) 472 7) What is a binary shift a) Where the binary numbers do not move b) Where the binary numbers only shift to the right c) Where the binary numbers shift either left or right 8) What base is binary in a) base 1 b) base 2 c) base 0 9) How do binary shifts work? a) We shift the numbers the opposite way b) Do not move the numbers c) Shift the numbers to the way direction 10) What is an overflow error? a) Where theres an extra bit the computer cannot handle b) Where theres too little bits c) When there’s exact amount of bits computer can handle 11) Describe advantage of linear search a) If criteria matches last item, whole list needs to be checked b) Simpler to code than binary search c) Quicker than binary search d) Only work on ordered list 12) What type of lists are binary searchs for? a) Unsorted lists  b) Sorted lists c) Any kind of list 13) Describe advantage of binary search a) Simpler to code than binary b) If criteria matches last item, whole list needs to be checked c) Quicker than linear search d) Only work on ordered list 14) What is meant by the term ‘algorithm’ a) Step by step instructions to solve a problem b) Coding c) A problem that cannot be fixed 15) Describe another advantage of binary search? a) Data doesn’t need to be in order b) Works well over large ordered lists c) Slow with large lists d) Only work on an ordered list 16) Describe a disadvantage of linear search a) Only work on ordered list b) Simpler to code than binary c) Quicker than linear search d) When criteria is not in list or last in list 17) What type of lists are linear search algorithms used for? a) Unsorted lists b) Any lists c) Sorted lists 18) Which of these is a disadvantage of linear search a) Data not needing to be in order b) Performs well over large lists c) Only work on ordered lists d) Slow with large data sets 19) How many comparisons is needed to find number 1 in list : 12 6 8 1 3 a) 1 b) 3 c) 4 d) 7 e) 3 f) 5 20) How many comparisons is needed to find the number 1 using binary search in list: 3 5 9 10 23 a) 2 - 3 b) 4 - 5 c) Cannot be found d) 0 - 1 21) What is a variable a) Where value can be changed by user b) No idea c) A software d) Coding 22) What is the best description of a linear search a) A software t search up questions b) To find something c) Sorts through each item until a mach is made d) Sorts things in an ordered array 23) What is the best description for a binary search? a) Finds item in unsorted array b) Finds position of element in a sorted array c) Finds the last item of a list d) Finds middle of list only 24) What does syntax mean? a) A problem b) An error in the computer c) Something that cannot be solved d) Errors in you code that the computer cannot interpret 25) What do computers store data in? a) Binary b) Hexadecimal c) Denary 26) What is the best description of binary? a) System that uses 0 and 1 to represent data b) Way to show data in real life c) Uses 0-9 to represent data 27) 16 to binary a) 1000 b) 10000 c) 100 d) 101100 28) If 1 and 0 means on and off, what does the number 1 mean a) Off b) On 29) 1101 to denary a) 12 b) 14 c) 3 d) 13 30) What is a bit a) Numerical system made from 16 numbers b) Keyboard system c) Smallest amount of data 31) 1111 in denary a) 11 b) 14 c) 15 d) 20 32) A byte is made up of how many binary digits a) 4 b) 6 c) 2 d) 8 e) 12 33) What kind of data does computers represent with binary a) Numbers b) Pictures c) Letters d) All of the above 34) What is 1111 converted into denary a) 16 b) 13 c) 15 d) 5 35) 64 to binary a) 0010000 b) 0100010 c) 01000000 d) 010010001 36) 28 to binary a) 10011 b) 00111 c) 11100 d) 11001 37) 16 to binary a) 00010000 b) 10000000 c) 00100000 38) 8 into binary a) 10000 b) 1100 c) 1000 d) 1001 e) 1010 39) Binary number 10001010 in hex a) AA b) 8A c) A8 d) AB 40) Why does compression helpful a) Doesn’t help b) Routers can recognise zipped files c) It’s better than not compressing files d) Less to be sent over 41) B2 from hex to denary a) 1001110 b) 178 c) 256

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