A Question 9 The Evil scheduler generates sequences of instructions to execute based on the code below that is executed by two threads. Which of the following sequences of execution are possible? You can assume in this case that each of these instructions is atomic. In addition, you can assume any valid sequence of instructions before the ones listed below.. 181 //st (shared variable in the main program) withis is the function that threads execute ille) ( **** AWAPE 1 (138) 12.15.04.16.13 201 //M M 776

A Question 9 The Evil scheduler generates sequences of instructions to execute based on the code below that is executed by two threads. Which of the following sequences of execution are possible? You can assume in this case that each of these instructions is atomic. In addition, you can assume any valid sequence of instructions before the ones listed below.. 181 //st (shared variable in the main program) withis is the function that threads execute ille) ( **** AWAPE 1 (138) 12.15.04.16.13 201 //M M 776

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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Question 22 Write a program that reads integers user_num and div_num as input, and output the quotient (user_num divided by div_num). Use a try block to perform all the statements. Use an except block to catch any ZeroDivisionError and output an exception message. Use another except block to catch any ValueError caused by invalid input and output an exception message. Please do it ONLY in Python Language also inlcude the input and output screenshot
You'll write a C++ program to demonstrate thread synchronization. Your main function should first create an empty file called *sync.txt*. Then it will create two separate threads: *Thread-A* and *Thread-B*. Both threads will open *sync.txt* and write to it simultaneously. *Thread-A* will write the numbers 0 through 9, a total of fifty-thousand times in nested `for` loops, then exit. In other words, print the numbers 0 through 9 over and over again, with each run on a separate line, for 50,000 lines. Here's an example of one such line: ```text 0 1 2 3 4 5 6 7 8 9 ``` Somewhat similarly, *Thread-B* will write the letters A through Z fifty-thousand times in nested `for` loops, then exit. In other words, print the letters A through Z over and over again, with each run on a separate line, for 50,000 lines. Here's an example of one such line: ```text A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ``` Do not write each line as one long string. You must write each character to the…
Exception Project JAVA Create a Java program that searches for a student’s ID or name in a text file, complete the findID() and findName() functions. Then, insert a try/catch statement in main() to catch any exceptions thrown by findID() or findName(), and output the exception message. Each line in the text file contains a name and ID separated by a space. Function findID() has two parameters: a student's name (string) and the text file's contents (infile, input file variable). The function findID() returns the ID associated with the student's name if the name is in the file, otherwise the function throws a runtime error with the message "Student ID not found for studentName", where studentName is the name of the student. Function findName() has two parameters: a student's ID (string) and the text file's contents (infile). The function findName() returns the name associated with the student's ID if the ID is in the file, otherwise the function throws a runtime error with the message…
In this assignment, you will create a Java program to search recursively for files in a directory.• The program must take two command line parameters. First parameter is the folder to search for. Thesecond parameter is the filename to look for, which may only be a partial name.• If incorrect number of parameters are given, your program should print an error message and show thecorrect format.• Your program must search recursively in the given directory for the files whose name contains the givenfilename. Once a match is found, your program should print the full path of the file, followed by a newline.• You can implement everything in the main class. You need define a recursive method such as:public static search(File sourceFolder, String filename)For each subfolder in sourceFolder, you recursively call the method to search.• A sample run of the program may look like this://The following command line example searches any file with “Assignment” in its name%java FuAssign7.FuAssignment7…
Can you please help me with this code because I am struggling on how to do this, This has to be in C code. question that I need help with: Write a multithreaded program that calculates various statistical values for a list of numbers. This program will be passed a series of numbers on the command line and will then create three separate worker threads. One thread will determine the average of the numbers, the second will determine the maximum value, and the third will determine the minimum value. For example, suppose your program is passed the integers 90 81 78 95 79 72 85 The program will report The average value is 82 The minimum value is 72 The maximum value is 95 The variables representing the average, minimum, and maximum values will be stored globally. The worker threads will set these values, and the parent thread will output the values once the workers have exited. (We could obviously expand this program by creating additional threads that determine other statistical values,…
#include <iostream>#include <pthread.h>#include <stdlib.h> #define TOTAL_THREADS 4 int count;pthread_mutex_t the_mutex; // phread mutex variable - initialize here if using the initializer macro void* myFunction(void* arg){int actual_arg = *((int*) arg);for(unsigned int i = 0; i < 10; ++i) {// TODO:// Use a Pthread mutex to control// access to the critical region. // Beginning of the critical regioncount++;std::cout << "Thread #" << actual_arg << " count = " << count << std::endl; // End of the critical region// TODO:// Relinquish access to the Pthread mutex// since critical region is complete. // Random wait - This code is just to ensure that the threads// show data sharing problemsint max = rand() % 100000;for (int x = 0; x < max; x++);// End of random wait code}pthread_exit(NULL);} int main(){int rc[TOTAL_THREADS];pthread_t ids[TOTAL_THREADS];int args[TOTAL_THREADS];// TODO: Initialize the pthread mutex here if using the…
Task 3: Summary We would like to be able to generate a summary for each logfile to give us a rough idea of its contents. Instructions Create a file called Summary.java. As with Task 1, open the file for reading in a try-catch block. Read through the entire file, counting how many of each message/event type occurs. Print out a summary with the count of each event/message type. As a sanity check: the total number of message/event type counts should equal 1000. Hint: a useful method could be String.split. Sample Input/Output Example 1: Summary -------------------- Notifications: 322 Warnings: 326 Errors: 352 Cannot find logfile! Exiting...
In C++, not C please! Assume that your computer has 4 CPUs. Write a multithreaded program that runs 4 different threads concurrently. The entire process will add the first 1,000,000 numbers (from 1 to 1,000,000) to a shared variable sum. You need to use a pthread_mutex_t to provide mutual exclusion so that the final result of sum is 500,000,500,000 Note: you can download and modify the file summation_thread_shared_sum.cpp. This file does not use a mutex lock, so the result is incorrect. You must add a mutex lock correctly in the file so that the program generates the right outcome.
Which of the following statements about static and dynamic library is/are INCORRECT? (a) libTeslaFactory.a used in Assignment 2 is a static library. (b) Static libraries use more memory as they copy code into executable files. (c) One advantage of static libraries is that they are directly executable. (d) Calling shared libraries functions won't generate page faults as they are usually resident in memory. (e) None of the above (i.e., (1)-(4) are all CORRECT)
Post a total of 3 substantive responses over 2 separate days for full participation. This includes your initial post and 2 replies to classmates or your faculty member. Due Day 3 It’s important to program your code efficiently. Efficient code manages errors and exceptions and cleans up memory after it ends. The try-except statements are helpful in handling errors that are detected during execution. Respond to the following in a minimum of 175 words: What are the 2 categories of errors when debugging code? How can the try-except statements handle errors in Python? Provide a code example that supports your comments.
Need help to implement networking in python Server.py Load data from file This option will ask the user for a fully qualified path and will load a JSON file containing the information for users and pending messages. The format of the JSON file will be defined based on your implementation and it will the same used to save the data into file (menu option #4). Functionalities the server must provide: 1) User Sign Up: adds a user identified by a phone number to the system. a) Protocol: USR|username|password|display_name b) Response: 0|OK for success. 1| for an error. c) The server should validate that the username does not exist 2) User Sign In: verify user credentials a) Protocol: LOG|username|password b) Response: i) 0|OK → the credentials are correct. ii) 1|Invalid Credentials iii) 2|Already Logged In → in case that the user is logged in from another client. c) This will help the server knowing which user is connected. d) The server should keep a list of connected clients, which should…
Hello, I am having an error and cannot figure out how to solve this question. Could someone please assist? Please be advised, I am using PostgreSQL as that is what was used in class. Thus, I must use PLPGSQL Code CREATE OR REPLACE FUNCTION Moreno_03_bankTriggerFunction()RETURNS TRIGGERLANGUAGE PLPGSQLAS$$CREATE TRIGGER Wise_12_bankTriggerAFTER DELETE ON accountFOR EACH ROW EXECUTE PROCEDURE Moreno_15_bankTriggerFunction();