Which of the following is not true of a loop invariant? O If it is True just before entering the loop, it must also be True right after executing the last line of the loop, even if it temporarily stops being True somewhere within the body of the loop. O It is a proposition, and therefore evaluates to a True or False value. It must be a tautology. If the loop invariant is True before entering a loop, the loop entry condition may still be False, meaning that the loop would not be executed and the loop invariant would remain True by default.

Which of the following is not true of a loop invariant? O If it is True just before entering the loop, it must also be True right after executing the last line of the loop, even if it temporarily stops being True somewhere within the body of the loop. O It is a proposition, and therefore evaluates to a True or False value. It must be a tautology. If the loop invariant is True before entering a loop, the loop entry condition may still be False, meaning that the loop would not be executed and the loop invariant would remain True by default.

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

See similar textbooks

Similar questions

e input is: 3 the output is: heads heads tails For reproducibility needed for auto-grading, seed the program with a value of 1. In a real program, you would seed with the current time. In that case, every program's output would be different, which is what is desired but can't be auto-graded. Note: A common student mistake is to seed before each call to random.randint(). But seeding should only be done once, at the start of the program, after which random.randint() can be called any number of times. Your program must define and call the heads_or_tails() function that randomly picks 0 or 1 and returns "heads" or "tails". Assume the value 0 represents "heads" and 1 represents "tails". i have this: import random def heads_or_tails(n): i=0 while i<n: random.randint(0,1) if num==0: print('heads') else: print('tails') i = i + 1 if __name__ == '__main__': random.seed(1) number_of_flips = int(input()) heads_or_tails(number_of_flips) it…
Python Language] Using loops of any kind, lists, or is not allowed. At the Academy of Crime Fighting, each trainee is recognized by a unique 5-digit identifier. The identifier can have any of the following digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. The identifier can have leading 0s. Since Drew the owl has trouble typing numbers, the school makes things easier by ensuring that each successive digit in the identifier is either one digit greater or one digit less than the previous digit. For example, if the first digit is 3, then the successive digit would be 4 or 2. So, 32345 would be a valid trainee identifier, but 32435 would NOT be a valid identifier because the third digit 4 is two digits away from the previous digit 2. Your task is to write a program that validates an identifier. Input The input consists of five lines; the first line is the first digit of the trainee identifier, the second line is the second digit of the trainee identifier, and so on. Output If the trainee identifier is…
Please assist with problem.
Problem Description: Implement the described Mancala variant in C++ in the pictures. Player 1 will be a human while the other will be a computer player. The computer player selects a hole following the following decision logic: If there is a hole with enough pieces to finish the turn in the computer player's end zone, select it. Otherwise select the hole on the right to left path with the greatest amount of marbles. If there are no marbles on that path then select the hole closest to the opponent's end zone. It is highly suggested, but not required, to pause the output after the computer makes a move to allow the user to interpret the output before more gets printed out. Look into cin.get(); The program should not allow the player to enter incorrect selections. The player cannot select a nonexistent hole, the end zones, or an empty hole. Look at the example output for an example for how to output the game board formatted in a nice way. You must tell the player what input is valid. For…
Using the C++ programming language. At the station the child marks the colour of any bogie of any colour from V-Violet, Indigo, B-Blue, G-Green, Y-Yellow, O-Orange, R-Red. A few trains come and go and are provided with the S series. The stationmaster's favourite train consists of bogies with a combination of colours identified by the series F. It is noted that at the station, every hour, passes X bogies. You just have to say the hour when the stationmaster's favourite train visited for the first and last time Input: 2 VIBGYOYORBGIIOYVVVRYOYOV 6 YOYO VIBGYOYORBGIIOYVVVRYOYOV 6 VBB Output: 14 -1
Modified coin-row problem:If we modified the coin-row problem, so that you cannot take the adjacent coin, and youcannot take the coin next to the adjacent coin also (see example below), what would thedynamic programming formula F(n) be?Example: A, B, C, D, E, F, G, H, I, JIf A is taken, then B & C cannot be taken, but D (or above D, like E and so on) can be taken.If B is taken, then A, C, D cannot be taken.And so on.
Your checkWinner function should determine whether or not the game is over. If the game is over, it should print who won (if anyone), and return true. If the game is not over, it should return false. The game is over if someone wins by getting three X's or three O's in a row, column or diagonal. So there are 8 different combinations of 3-in-a-row moves. You may assume that the board has a size of 3 (length and width). The TicTacBoard.java file I'm giving you uses a variable for that size, but you can assume it's always 3. The game is also over if the board is full but nobody won. I recommend you write some other functions to help in determining if the game is over. Remember you should never copy and paste code if you can avoid it. Write a function to perform a common, generalizable task, and call that function every time you need it. (Like I did with my dispRow method.) Please follow the standard conventions for indentation, meaningful variable names, etc. like the examples in class…
Practicing Loops. Einstein Private Elementary school has three classes in each of its 9 grades. 27 classes in total. It has kindergarten (grade 0) though 8th grade. The school allows parents to pay tuition over the nine-month school year. Tuition for kindergarten is $90 dollars every month. Tuition for the other grades is $50 times the grade level every month. (1st grade is $50 a month, second grade is $100 a month, etc.) Design a programming solution that outputs nine tuition payment bills for each of the 27 classrooms. Each bill must contain the grade number (0 through 8), the classroom number (1 through 3), the month (1 through 9) and the amount of the tuition due. Your output should look something like: Grade Classroom Month Tuition 0 1 1 90 0 1 2 90 0 1 3 90 0 1 4 90 ... 8 3 7 400 8 3…
Alert -Don't submit AI generated answer and i need unique response only if I see plagiarism then I'll reduce rating for sure.
There are 50 lighting lamps, numbered 1 to 50, on a car race track. Initially all lamps are off. 10 cars numbered from 1 to 10 complete the track on the race track one by one. So, after a car completes track, the next car stars completing the the track. When the car passes in front of the lamp, if the number of the lamp is exactly divided by the number of the car, the lighted lamp turns OFF and the dimed lamp is turned ON. Write the program that finds out and displays on the screen which lamps are ON and which lamps are OFF, after the tenth car comples the track. After 18 cars finish race track driving : Lanps that are ON : 149 11 12 13 14 15 17 18 19 20 21 23 27 29 31 35 37 41 42 43 44 47 Lanps that are 0FF : 235678 18 16 22 24 25 26 28 30 32 33 34 36 38 39 40 45 46 48 49 50 Process exited after 0.02383 seconds with return value 8 Press any key to continue .
An employee uses the following coding logic for the company’s resource access: String result = authenticate( . . . ) ; if(result.equals (ACCESS DENY) ) // do stuff after authentication fails e l s e // do stuff after authentication succeeds Suppose values returned by the authenticate function include ACCESS OK and ACCESS DENY. Is there a security flaw in the program? If so, explain and rewrite the code.
White-box testing is defined as. Is it required to do white-box tests?