Given the following statement, which statement will write "Calvin" to the file DiskFile.txt? PrintWriter diskOut = new PrintWriter("DiskFile.txt"); 1. System.out.println(diskOut, "Calvin"); 2. DiskFile.println("Calvin"); 3. PrintWriter.println("Calvin"); 4. diskOut.println("Calvin");
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Given the following statement, which statement will write "Calvin" to the file DiskFile.txt?
PrintWriter diskOut = new PrintWriter("DiskFile.txt");
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- In this assignment, you will create a Java program to read undergraduate and graduate students from an input file, sort them, and write them to an output file. This assignment is a follow up of assignment 5. Like assignment 5, your program will read from an input file and write to an output file. The input file name and the output file name are passed in as the first and second arguments at command line, respectively. Unlike assignment 5, the Student objects are sorted before they are written to the output file. • The program must implement a main class, three student classes (Student, UndergradStudent, GradStudent), and a Comparator class called StudentIDComparator. • The StudentIDComparator class must implement the java.util.Comparator interface, and override the compare() method. Since the Comparator interface is a generic interface, you must specify Student as the type parameter when defining the StudentIDComparator class, i.e., public class StudentIDComparator implements…Consider the following code segment: done = False while not done : try : filename = input("Enter the file name: ") inFile = open (filename, "r") except IOError : print ("Error: File not found.") It is supposed to keep on prompting the user for file names until the user provides the name of a file that can be opened successfully. What line of code should be placed in the blank to achieve this goal? Select one: done = inFile done = True done = not inFile done = FalseGiven a valid file object, f, which of the following calls will return the entire contents of the file in a scalar x? x = f.readline() x = f.readlines() x = f.read() X = read(f)
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- Instructions The history teacher at your school needs help in grading a True/False test. The students’ IDs and test answers are stored in a file. The first entry in the file contains answers to the test in the form:TFFTFFTTTTFFTFTFTFTTEvery other entry in the file is the student ID, followed by a blank, followed by the student’s responses. For example, the entry:ABC54301 TFTFTFTT TFTFTFFTTFTindicates that the student ID is ABC54301 and the answer to question 1 is True, the answer to question 2 is False, and so on. This student did not answer question 9. The exam has 20 questions, and the class has more than 150 students. Each correct answer is awarded two points, each wrong answer gets one point deducted, and no answer gets zero points. Write a program in C++ that processes the test data. The output should be the student’s ID, followed by the answers, followed by the test score, followed by the test grade. Assume the following grade scale:90%–100%, A; 80%–89.99%, B; 70%–79.99%, C;…Can you help/guide me on this assignment, here are the directions: Write a program that reads words from a text file and displays all the words (duplicates allowed) in ascending alphabetical order. The words must start with a letter. The text file is passed as command-line argument (you can assume that the text file is in the same directory as the executable, i.e. bin). I think the code is correct but I believe what I'm doing wrong is the Command line argument where I'm placing the text file. Which I think is in the right place, apparently not. Here's my work:When you say a file is indexed, do you mean it has an index directory that allows for random access?