Suppose that a program runs for a while, then prints "Hit any key to continue," waits for a key to be pressed, and then prints the results and terminates. Which of the following three numbers output by the Unix/Linux/Posix time command would be most affected by the user of that program taking a while to figure-out that there is no "any" key and thus not pressing any key until 5 minutes later, after discussing this with an IT support person? Group of answer choices a) User time b) Real time c) System time
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Suppose that a program runs for a while, then prints "Hit any key to continue," waits for a key to be pressed, and then prints the results and terminates. Which of the following three numbers output by the Unix/Linux/Posix time command would be most affected by the user of that program taking a while to figure-out that there is no "any" key and thus not pressing any key until 5 minutes later, after discussing this with an IT support person?
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- Write the C or C++ program system2 that reads, when being executed, OS commands via the "command line parameter" C/C++ feature, and then executes them. The command line parameters must be legal Unix/Linux commands. Print the number of commands entered. To prepare, read about argc, argv, and envp. Focus is only argc and argv. A sample execution by fictitious user "mike" is: herb$ ./a.out pwd ls whoami argc 4 pwd argv[1] Executing command /Users/mikey 'pwd' = ls argv[2] Executing command 'ls' Applications Contacts Music Pictures familie herb Downloads testl Favorites Library Movies testl.c pix_low_2020 test2 test2.c Desktop Public Documents a.out test.c argv[3] = whoami Executing command mikey 'whoami'Given a PDA M = (K, E, A, A, s, F) and input string 'w', write the following. a. Initial configuration p. Accepting configuration c. Rejecting configurationA program evaluates binary arithmetic expressions that are read from an input file. All of the operands are integers, and the only operators are +, -, *, and 7. In writing the program, the programmer forgot to include a test that checks whether the right-hand operand in a division expression equals zero. When will this oversight be detected by the computer? (A) At compile time (B) While editing the program (C) As soon as the data from the input file is read (D) During evaluation of the expressions (E) When at least one incorrect value for the expressions is output
- Write a Python program in a Linux/UNIX script called myprogram.py. Write a Python program that continuously (i.e., in an infinite loop) asks the user for a number m. At each iteration of the loop, check in parallel whether m is greater than 10, greater than 20, and greater than 30. Make sure that the three comparisons may be performed in parallel (i.e., so that the three outputs can theoretically be printed in any order). Use the smallest number of processes. Make sure you don’t create zombie processes. Use the code below as a template. Use this template: from os import wait,waitpid,fork # write your code here while (True): #make sure to indent this and the next lines m=float(input('Give me a number: ')) # your code hereImplement a simple version of the linux grep command in C++. grep - Looks through a file, line by line, trying to find a user-specified search term in the line. If a line has the word within it, the line is printed out, otherwise it is not. Use the system calls open(), getline(), close(). Requirements (examples run from. terminal) Your program grep is always passed a search term and zero or more files to grep through (thus, more than one is possible). It should go through each line and see if the search term is in it; if so, the line should be printed, and if not, the line should be skipped. [terminal]$ ./grep ! main.cpp main2.cppcout << "Hello, World!";cout << "Programming is great fun!"; The matching is case sensitive. Thus, if searching for world, lines with World will not match. Lines can be arbitrarily long (that is, you may see many many characters before you encounter a newline character, \n). grep should work as expected even with very long lines. For this,…Develop a single program using a python programming language that:a. Encrypts and decrypts a message using the Cesar’s Cipher. The user encryptingthe message is prompted to enter a message and then a key that indicates the displacement.The user decrypting the message is prompted to enter the encrypted message and the key.b. Decrypts and displays all (26) possible solutions
- Write a C program that contains two processes; parent and child. Each process will print out a message indicates its number, and its parent number. These messages will print out into a txt file named "yourname.txt" Output.txt will be like this I'm the parent process, my ID is ###, my parent ID is ### I'm the child process, my Id is ###, my parent ID is ### Output.txt Notes: 1- Submit your code as a file named with (yourname.sh) only. Be sure to submit an error free, and executable file. 2- Assume that "yourname.txt"will be on the same working directory.Create a program (in Java or Python) to encrypt and decrypt messages using the Shift Cipher. Your program should behave as following: Ask the user if they want to encrypt or decrypt a message or quit the program. Ask the user for the key Ask the user for the message Print out the encrypted or decrypted message. Go back to step 1.Make a PYTHON program that will ask the user for username and password registration. After registration, the user will proceed to login the registered username and password. “Welcome!” prompt will be displayed for a successful login while “Access denied!” prompt when either username and/or password were not the same from the registered credentials. When the access is DENIED, the user may still be able to input username and password for 2 more attempts. The system will automatically end when reached the 3rd denied accesses. Ps. Paste your source code and upload a screenshot of source code and output. Thanks The first photo is example of denied log in output and second photo is successful log in output.
- 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…Implement a simple version of the linux cat command in C++. Use the system calls open(), get() and close(). cat - reads a file as specified by the user and prints its contents. A typical usage is as follows: If from my terminal y run ./cat main.cpp the contents of main.cpp. will be printed. Your program cat can be invoked with one or more files on the command line; it should just print out each file in turn. Example: [terminal]$ ./cat main.cpp main2.cpp #include <iostream>using namespace std;int main(){cout << "Hello, World!"; return 0;}#include <iostream>using namespace std;int main(){cout << "Programming is great fun!";return 0;} As you can see content of main.cpp was printed first and the content of main2.cppWrite a program python that • Requests a temperature from the user. • Also asks if the temperature is in Fahrenheit (F) or Celsius (C).• Converts the entered temperature to the other scale.• Prints out the result as illustrated below. C=5/9(F-32) and F=9/5C + 32