For each of the following problems, you should write your answer as an expression. Do notgive the final numeric value. For example, if your answer is the number of6-permutations of a set with 10 elements, you should write P(10,6) or 10!/4! or 10 × 9 × 8 ×7 × 6 × 5, but not 151200. (20 pt., 5 pt. each) How many different bit strings of length 9...5.1 ...contain at least three O's?5.2 ...start and end with the same digit and contain at most two 1's?5.3 ...start with a 1 or contain exactly four 0's?5.4 ...contain at least four consecutive 1's?

Answered: Image /qna-images/answer/4fabe753-2b75-4c4c-8e5d-27c2cef4fd14.jpg

Answered: For each of the following problems, you…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write a section of code that creates the pairings for two sets of numbers a = {0 – 5} and b = {9 - 15}. Each number must be paired with all numbers from the other set. This is a cross product, denoted as a x b. That is, for every number in a, it should be listed with every number in b, such as (0, 9), … (0, 15), and so on. Make sure there are no spaces between numbers and the (, ), or comma.
Write a for loop to print all elements in courseGrades, following each element with a space (including the last). Print forwards, then backwards. End each loop with a newline. Ex: If courseGrades = {7, 9, 11, 10}, print:7 9 11 10 10 11 9 7 Hint: Use two for loops. Second loop starts with i = NUM_VALS - 1. Note: These activities may test code with different test values. This activity will perform two tests, both with a 4-element array (int courseGrades[4]). Also note: If the submitted code tries to access an invalid array element, such as courseGrades[9] for a 4-element array, the test may generate strange results. Or the test may crash and report "Program end never reached", in which case the system doesn't print the test case that caused the reported message. #include <iostream>using namespace std; int main() { const int NUM_VALS = 4; int courseGrades[NUM_VALS]; int i; for (i = 0; i < NUM_VALS; ++i) { cin >> courseGrades[i]; } /* Your solution goes…
def fquartic(x): return (x**4-1) Find the roots There are two real roots of this function. Even though you may immediately see what those roots are, use scipy.optimize.root_scalar to find those roots one by one: Use the default method (i.e. don't specify a specific method for root finding) Specify appropriate x0 and x1 values for each one of the roots (don't pick them right on top of the roots, but pick them close) Make sure that the converged attribute of your solutions are both True.
Computer Science This is a codingbat problem. Please answer in Java and do not change the starter code. You have been asked to write the game of tic tac toe. In the first version of the game, we will only be comparing horizontally for a win. A win is determine by all of the elements in a row either being an X or an O. You need to return a String with the winner or TIE if there is no winner. ticTacToe(["X", "O", "O"], ["X", "O", "O"], ["X", "X", "X"]) → "X"ticTacToe(["X", "O", "X"], ["X", "X", "O"], ["O", "O", "O"]) → "O"ticTacToe(["X", "O", "X"], ["X", "X", "O"], ["O", "X", "O"]) → "TIE" public String ticTacToe(String[] top, String[] middle, String[] bottom) { }
In java, please read the text file as array. Then, replace the null with 0 and calculate the sum of the new students in ABC University.Example of text file: (university,year,total_students,new_students,new_staff,ABC, 2000, 3457, , ,ABC, 2001, 3675,218, ,EFG, 2000, 2389,602, ,EFG, 2001, 2785,396, 65,)
Multiple Frequencies. In the last assignment, we calculated the frequency ofa coin flip. This required us to have two separate variables, which we used to record the numberof heads and tails. Now that we know about arrays, we can track the frequency of all numbers ina randomly generated sequence.For this program, you will ask the user to provide a range of values (from 1 to that number,inclusive) and how long of a number sequence you want to generate using that number range.You will then generate and save the sequence in an array. After that, you will count the numberof times each number occurs in the sequence, and print the frequency of each number.Hints: You can use multiple arrays for this assignment. One array should hold thenumber sequence, and another could keep track of the frequencies of each number.Sample Output #1:What’s the highest number you want to generate?: 5How long of a number sequence do you want to generate?: 10Okay, we’ll generate 10 number(s) ranging from 1 to 5!1,…
def findOccurrences(s, ch): lst = [] for i in range(0, len(s)): if a==s[i]: lst.append(i) return lst Use the code above instead of enumerate in the code posted below. n=int(input("Number of rounds of Hangman to be played:")) for i in range(0,n): word = input("welcome!") guesses = '' turns = int(input("Enter the number of failed attempts allowed:")) def hangman(word): secrete_word = "-" * len(word) print(" the secrete word " + secrete_word) user_input = input("Guess a letter: ") if user_input in word: occurences = findOccurrences(word, user_input) for index in occurences: secrete_word = secrete_word[:index] + user_input + secrete_word[index + 1:] print(secrete_word) else: user_input = input("Sorry that letter was not found, please try again: ") def findOccurrences(s, ch): return [i for i, letter in enumerate(s) if letter == ch] *** enumerate not discussed in…
Consider the set A = {1, 2, 11, {121}, 22, 1212, (111, 212, 112}} Enter the value of Al. (Note: Enter a number).
Mailings Review View Help AaBbC AaBbCcD AaBbCcD AaBbCc Aa Heading 1 T Normal 1No Spac. Heading 2 Hea Paragraph Styles 8. Consider the following equation for the sum of a finite arithmetic series: S, = n(a, ta where n is the number of elements in the series, a is the first element of the series, and a, is the last element of the series. Write a method that returns the sum of the elements stored in the array in 8 above. The array must be passed to the method as an argument. Your solution should implement the equation for the sum S.
Write method to reverse sequence of elements in array. if you call a method with array: 1 4 9 16 9 7 4 9 11 array is converted to. this is just example 11 9 4 7 9 16 9 4 1
In the "Common Array Algorithms" section, you learned how to find the position of an element in an array. Suppose you want to find the position of the second match. You could remove the first match and start over, but that would be wasteful. Instead, adapt the algorithm from that section so that it starts the search at a given position, not zero. Complete the following code.
P1 P2 P3 P4 A pentagonal number is one that corresponds to dots arranged into a pentagon. Above are the first four pentagonal numbers and their pentagons. The pentagonal number PN has sides made of N dots. When you count the dots for a pentagonal number, include the dots for the inner pentagons. So to figure out how many dots PN has, find out how many P(N-1) has and add the dots for the new sides of size N. P1 = 1, P2 = 5, P3 = 12, P4 = 22 Figure out a recursive formula for PN and then write a function that implements it. That is, implement pentagonal() using recursion. pentagonal(1) -> 1 pentagonal(2) -> 5 pentagonal(3) -> 12

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