Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Given two arrays of integers, write a function to find the intersection of the arrays. The intersection should include only distinct elements and the
result should be in sorted order. Solve this problem using the hash set approach.
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- I have this function that works for the selection sort. I need a function that would work using the same logic for the BubbleSort and InsertionSort. void Selection_Sort(struct studentTag STUDENTS[], int nStudents){ struct studentTag s, t, temp; int i, j; for(i = 0; i < nStudents; i++) { for(j = i + 1; j < nStudents; j++) { s = STUDENTS[i]; t = STUDENTS[j]; if (strcmp(s.name.last, t.name.last) > 0) { temp = STUDENTS[j]; STUDENTS[j] = STUDENTS[i]; STUDENTS[i] = temp; } else if (strcmp(s.name.last, t.name.last) == 0) { if (strcmp(s.name.first, t.name.first) > 0) { temp = STUDENTS[j]; STUDENTS[j] = STUDENTS[i]; STUDENTS[i] = temp; } } } } }arrow_forwardThis code is for Guass Siedel itrations, There are many syntex errors in this code, anybody can remove the syntex errors? A = np.array([[10., -1., 2., 0.], [-1., 11., -1., 3.], [2., -1., 10., -1.], [0., 3., -1., 8.]]) # initialize the RHS vector b = np.array([6.0, 25.0, -11.0, 15.0]) print("System of equations:") for i in range(A.shape[0]): row = ["{0:3g}*x{1}".format(A[i, j], j + 1) for j in range(A.shape[1])] print("[{0}] = [{1:3g}]".format(" + ".join(row), b[i])) x = np.zeros_like(b) for it_count in range(1, ITERATION_LIMIT): x_new = np.zeros_like(x) print("Iteration {0}: {1}".format(it_count, x)) for i in range(A.shape[0]): s1 = np.dot(A[i, :i], x_new[:i]) s2 = np.dot(A[i, i + 1 :], x[i + 1 :]) x_new[i] = (b[i] - s1 - s2) / A[i, i] if np.allclose(x, x_new, rtol=1e-8): break x = x_new print("Solution: {0}".format(x)) error = np.dot(A, x) - b print("Error: {0}".format(error))arrow_forwardPYTHON Why am I getting an error and it doesn't show the right output? Problem 1# Implement a hashtable using an array. Your implementation should include public methods for insertion, deletion, and# search, as well as helper methods for resizing. The hash table is resized when the loadfactor becomes greater than 0.6# during insertion of a new item. You will be using linear probing technique for collision resolution. Assume the key to# be an integer and use the hash function h(k) = k mod m where m is the size of the hashtable. class HashTableProb: def __init__(self, size=10): # Initialize the hashtable with the given size and an empty array to hold the key-value pairs. self.__size = size # size of the hashtable self.__hashtable = [None for _ in range(size)] self.__itemcount = 0 # Keeps track of the number of items in the current hashtable def __contains__(self, key): return self.__searchkey(key) def __next_prime(self, x): def…arrow_forward
- A group of students writes their names and unique student ID numbers on sheets of paper. The sheets are then randomly placed in a stack. Their teacher is looking to see if a specific ID number is included in the stack. Which of the following best describes whether their teacher should use a linear or a binary search? a. The teacher could use either type of search though the binary search is likely to be faster b. The teacher could use either type of search though the linear search is likely to be faster c. Neither type of search will work since the data is numeric d. Only the linear search will work since the data has not been sortedarrow_forwardCreate a 1D integer array of size 17. Fill each index with a random value ranging from 1 to 359 inclusive. You will then design and implement the Random Sort algorithm using the following methods: Create a method called check_if_sorted (). It should take in a 1D integer array and return a boolean value. It should return TRUE if the array is sorted in nondescending order, and FALSE otherwise. Hint: If you compare elements in the array and a pair is in the wrong order, that would mean the array is not in non-descending order. Create a method called shuffleArray (). It should take in a 1D integer array and return a 1D integer array. Shuffle the array so that the values are in random different indexes, and return altered array. Hint: There are many approaches to solve this problem – making a second array in the shuffleArray () method might be part of the answer. Create a method called PrintArray (). It should take in a 1D integer array and return nothing. Simply print the current values…arrow_forwardGiven two arrays of integers, write a function to find the intersection of the arrays. The intersection should include only distinct elements and the result should be in sorted order. Solve this problem using the hash set approach.arrow_forward
- Write the state of the elements of the vector below after each of the first 4 passes of the outermost loop of the insertion sort algorithm. (After the first pass, 2 elements should be sorted. After the second pass, 3 elements should be sorted. And so on.) // index 0 1 2 3 4 5 6 7 vector<int> numbers{29, 17, 3, 94, 46, 8, -4, 12}; insertionSort(numbers); NOTE: Write your answer inside curly braces with numbers separated by commas {29, 17, 3, 94, 46, 8, -4, 12} after pass 1 after pass 2 after pass 3 after pass 4arrow_forwardSelect the for-loop which iterates through all even index values of an array.A. for(int idx = 0; idx < length; idx++)B. for(int idx = 0; idx < length; idx%2)C. for(int idx = 0; idx < length; idx+2)D. for(int idx = 0; idx < length; idx=idx+2)arrow_forward- In class HashTable implement a hash table and consider the following:(i) Keys are integers (therefore also negative!) and should be stored in the tableint[] data.(ii) As a hash function take h(x) = (x · 701) mod 2000. The size of the table istherefore 2000. Be careful when computing the index of a negative key. Forexample, the index of the key x = −10 ish(−10) = (−7010) mod 2000 = (2000(−4) + 990) mod 2000 = 990.Hence, indices should be non-negative integers between 0 and 1999!(iii) Implement insert, which takes an integer and inserts it into a table. Themethod returns true, if the insertion is successful. If an element is already inthe table, the function insert should return false.(iv) Implement search, which takes an integer and finds it in the table. The methodreturns true, if the search is successful and false otherwise.(v) Implement delete, which takes an integer and deletes it form the table. Themethod returns true, if the deletion is successful and false otherwise.(vi)…arrow_forward
- 6. Which of the following code snippet performs linear search recursively?arrow_forwardThe contents of the array below represent a BST (Binary Search Tree). What would be the contents of the array after 30 is deleted. Briefly explain how 30 would be deleted. Use an X to represent any empty spots in the array. 30 2050 10 25 40 60arrow_forwardSuppose we are performing a binary search on a sorted vector initialized as follows: // index 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16vector<int>numbers { 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34};intindex=binarySearch(numbers, 28); Write the indexes of the elements that would be examined by the binary search (the mid values in our algorithm's code) and write the value that would be returned from the search. find: indexes examined value returnedarrow_forward
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