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- Draw the TST that results when the keys "now is the time for all good people to come to the aid of" are inserted in that order into an initially empty TSTThe parity function is a very simple hash function producing a one-bit digest, which is 0 if the number of bits in the message is even and 1 if it is odd. Consider a communication system that uses 7 bits out of every byte to transmit data, and reserves the 8th bit (the one on the right) to transmit the parity of the other seven bits, for purposes of error checking. Below is the binary representation of some bytes that were transmitted using this system. For each one, tell whether there is a reason to suspect an error in transmission, giving the reason for your answer. 10110011 11101111 10101100 00110011Show, in the style of the trace given with the code, how the entropy-optimal sort first partitions the array B A B A B A B A C A D A B R A Use the form to answer the question as same on the picture. lt i gt 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 B A B A B A B A C A D A B R A.
- Dont copy from anywhere.Please check the answer and add explanation properly Implement ( program ) an attack on the Hill cipher as discussed in class and the textbook. Your attack should work on a 2 ∗ 2 matrix. Show how your attack works on the example on page 8 4 , and also run it on some other inputs.Assuming, starting from the top left, rows and columns are indexed from 0 on a chessboard, one can solve the N-queens problem, with N any positive integer, with the following pseudo code: placeQueen (row) { for(col = 0; col < N; ++col) { if board [row][col] is open { place queen in board [row][col] if(row < N) placeQueen(row+1) else done remove queen from board[row][col] } } } Is this an example of excessive recursion? Give a reason.
- Computer Science We want to expand Bloom Filters by giving them the ability to delete keys as well. Since Bloom Filters can give false positives, we will not be able to check whether the item to be deleted has actually been added - instead, you just get to assume that the remove functions will never be called for items that have not been added previously. We want to keep an absolute guarantee that there will never be false negatives, that is, if a key k has been inserted into the Bloom Filter, the response must always be true when the Bloom Filter is queried for k. How would you change the implementation of the Bloom Filter to fix this problem? You don't need to give code or pseudo-code so long as your explanation is clear. Also discuss what you are sacrificing with this implementation.What is the security requirement on password hashing? Given a password w, its hash is calculated as . This question is about the security requirement on function h. (a) Can we use any function as h for password hashing? For example, can we use the "mod 100" function, which is a common computer science function? (Given any integer value x, "mod 100" function works by "x mod 100," which is a value between [0, 99]; for example, if x = 105, x mod 100 = 5; x = 1000000, x mod 100 = 0;) (b) If not, what is the security requirement on h?In this activity, you will create cryptograms by encoding two messages using matrix multiplication. You must use a unique matrix to encode each cryptogram. For both messages, use this table of corresponding numbers and letters. _(space) 0 I 9 R 18 A 1 J 10 S 19 B 2 K 11 T 20 C 3 L 12 U 21 D 4 M 13 V 22 E 5 N 14 W 23 F 6 O 15 X 24 G 7 P 16 Y 25 H 8 Q 17 Z 26 Encode the message "go straight" using the matrix: 2 3 1 3
- GIVE authentic Answer: WEB TECHNOLOGIES Consider the Marks against each students in different subjects Student Names Database Tot Marks : 60 PF Tot Marks : 80 Marketing Tot Marks : 60 Irfan 56 45 59 Salma 67 56 52 Inayat 54 40 48 Basharat 56 53 51 Store these details in the Multidimensional Associative Array. Display the output as shown here S# Student Name Obt: Marks %age= (Obt:Marks / 200) * 100.0 Grade 1 Iranf 160 80 B 2 Salma 175 87 A 3 Inayat 142 71 C 4 Basharat 160 80 B A >80% B (71-80%) C (61-70%) D(51-60%) F<50% Grade Summary Total A Grade = 1 Total B Grade = 2 Total C Grade = 1 Total D Grade = 0 Total F Grade = 0 Add complete set of Screen Shots against all the steps…Modeling the spread of a virus like COVID-19 using recursion. Let N = total population (assumed constant, disregarding deaths, births, immigration, and emigration). S n = number who are susceptible to the disease at time n (n is in weeks). I n = number who are infected (and contagious) at time n. R n = number who are recovered (and not contagiuous) at time n. The total population is divided between these three groups: N = S n + I n + R n There are several hidden assumptions here that may or may not apply to COVID-19, such as a recovered person is assumed to not be able to get the disease a second time, at least within the time window being examined. On week 0 (the start), you assume a certain small number of people have the infection (just to get things going). Everyone else is initially susceptible, and no one is recovered. There are two constants of interest: Let period = time period that it takes for an infected person to recover (recover meaning they become not infectious to…A picture is worth a thousand words’ goes the saying: How much information is contained in a picture if the picture size is 250 x 400 pixels, and each pixel may take one of 256 colors with equal probability? Assume there are 60,000 words in a dictionary, and the 1000 words may be selected randomly from this dictionary. How much information do these 1000 words convey? What is the flaw in the above comparison?