Choose correct option: RandomAccessFile can be used to _______________________ a) Read from a random access file b) Write to a random access file c) Read and write to a random access file d) Restricts read and write to a random access file
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Choose correct option:
RandomAccessFile can be used to _______________________
a) Read from a random access file
b) Write to a random access file
c) Read and write to a random access file
d) Restricts read and write to a random access file
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- Please help how to fix this code? here's my code #include<stdio.h> #include<sys/stat.h> int checkIfFileExists(const char *filename); int main(void){char a[100];printf("Enter File Name:\n");scanf("%s",a);if(checkIfFileExists(a)){printf("The file has been opened Successfully.\n") ; }else{printf("The file cant be open. File does not exists.\n" ) ;} } int checkIfFileExists(const char* filename){struct stat buffer;int exist = stat(filename,&buffer);if(exist == 0)return 1;else return 0;} OUTPUT Write C statements which tests to see if file has opened the data file successfully. If not, print an error message and exit the program. NOTE:Your source code must display any of the given sample output below.It means your source code should be flexible enough to meet any of the given sample output.Your source code output must be identical to any of the given sample output.It means you have to strictly follow what are the displayed text, labels, casing of characters in the sample…A student wants to write into a file called myfile, without deleting its existing content. Which one of the following functions should he or she use? f = open('myfile', 'r') f = open('myfile', 'w+b') f = open('myfile', '+') f = open('myfile', 'a')A student launches the Python interpreter from his home directory. His home directory contains another directory called 'mydir', and 'mydir' contains two files called 'foo' and 'bar'. The home directory does not contain any files, only other directories. What will happen when he writes the following code at the Python prompt: >>> import os >>> filenames = os.listdir('mydir') >>> f= open(filenames[0]) ===================================================================================== A variable f representing a file object will be created, and the first file in the directory 'mydir' will be opened for writing in text mode. An error will be produced stating that the file to be opened does not exist. An error will be produced stating that filename is not subscriptable. A variable f representing a file object will be created, and the first file in the directory 'mydir' will be opened.
- For example, if you create a file named: "users.txt" that contains these user names: daniel moshe yossy gabi ran bijo baruch bibi The following command run in an elevated command prompt will parse this file, and create a new user on your computer FOR /F %i in (users.txt) DO NET USER %i P@ssw0rd /ADD With two (2) other options that you specify for each user when they are added?Write complete bash script that provides a menu to either double-space an input file or triple space an input file. Use the read command to obtainthe users choice and then perform the requested operation.For double spacing, the script will ask for an input file and then read eachline of the input file. For each line read, it then writes the line back toanother file, but with an extra blank line following. This has the effect ofdouble spacing the file. Include all necessary code to check if the readcommand gets the necessary filename, and whether the specified file exists. If so, continue with the double spacing, if not state that the filenamewas blank or does not exist and end the script.For triple spacing, the script will ask for an input file and then read each lineof the input file. For each line read, it then writes the line back to anotherfile, but with two extra blank lines following. This has the effect of triplespacing the file. Include all necessary code to check if the read…Q1: Suppose that the file (rectangle.txt) shown in the figure was stored in the default path, this file contain the length and width of unknown number of rectangles. Write a program to open the file for reading then calculate the area of each rectangle and store it in a new created file. ) rectangl.txt - Notepad File Edit Format View Help
- Assume that the output.txt file contains: First Line Given the following snippet of code: File output = new File("output.txt"); try { Files.writeString(output.toPath(), "Second Line", StandardOpenOption.CREATE); Files.writeString(output.toPath(), "Third Line", StandardOpenOption.CREATE, StandardOpenOption.APPEND); } catch(IOException ex) { System.out.println("Error: " + ex.getMessage()); } What would output.txt contain? Second Line Third Line First Line First Line Second Line Third Line Third Lineyou will need to create the following textbook specified files. Use vi to create these files: test-file1 test-file2 test-file3 test-g test-sor respected test-u west coast alpha1 alpha2 practice caffeine names.tmp numbers.tmp What command creates a new file chapter consisting of the contents of the files section1, section2, section3, and section4, with all lines numbered?#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> int main(){ int stdout_bak = dup(STDOUT_FILENO); // make a backup of stdout system("rm -f mystery.txt"); // remove file using a shell command int out_fd = open("mystery.txt", // open file mystery.txt O_WRONLY|O_CREAT, // for writing, create if needed S_IRUSR|S_IWUSR); // give user read/write permission if(out_fd == -1){ // check for errors opening file perror("Couldn't open file 'mystery.txt'"); exit(1); // bail out if open fails } printf("1. Now you see me.\n"); // print to the screen dup2(out_fd, STDOUT_FILENO); // change stdout to go to mystery.txt printf("2. Now you don't!\n"); // print goes to mystery.txt close(out_fd); // close mystery.txt dup2(stdout_bak, STDOUT_FILENO); // restore stdout to screen…
- ALL THE OUTPUT NEEDS TO BE IN A JFRAME, JPANEL, JLABELS and etc. Create a program that handles exception and allows writing to and reading from a text file. Write a program that will: Ask the user to select between two (2) options: Register: User shall input his desired username and password. These shall be saved in a text file named records.txt. Only alphanumeric characters are allowed. Login: User is asked to input a username and password. Validate using the text file created from the Register option. If both the username and password are correct, display the message "Successfully loggedin", else, display"Incorrectusername or password" Note: Just add a register and login forms and Save the user credentials in a txt file.FILE* inFile = fopen("filenam.txt", "r"); Given the above code segment, which of the following would output "FILE NOT FOUND" if the file could not be opened? Group of answer choices if(inFile == NULL) { printf("FILE NOT FOUND"); } if(inFile) { printf("FILE NOT FOUND"); } if(!inFile->is_open()) { printf("FILE NOT FOUND"); } None of these ============= What does sscanf do? Group of answer choices Reads from a file Reads from a keyboard Reads from a string Writes to a screen =========== What comes first in the software development life cycle? Group of answer choices Algorithm design Identifying the problem Coding Testingyou will need to create the following textbook specified files. Use vi to create these files: test-file1 test-file2 test-file3 test-g test-sor respected test-u west coast alpha1 alpha2 practice caffeine names.tmp numbers.tmp A file called empnames contains many employee names, with exactly one name on each line. What command outputs the names in the file in multiple columns, with columns before rows?