Computers and Technology, 14.06.2020 00:57 TroyClegg
A common hashing function that is used to assign memory addresses to records is h : {possible input records} → {0, 1, . . . , m − 1} Defined by hm(k) = k mod m where k is an integer and m is the number of memory locations. I am interested in using the hashing function above to assign every student in this class a number from 0 to 400. I will use the student’s PID to do this. Recall that a PID is a letter (A or U) followed by an 8-digit string. I will convert the 8-digit string into an integer k (ignoring leading zeros) then assign that student the number h401(k) = k mod 401. For example, if your PID is A00000129, then I would hash h401(129). (a) Is the function h401 : {all possible PIDs} → {0, 1, . . . , 400} onto? Justify your answer. (b) Use h401 to hash the PID A15078787 (c) Use h401 to hash the PID U47284106 (d) Find a different PID that will cause a collision with A15078787.
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A common hashing function that is used to assign memory addresses to records is h : {possible input...
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