Answered: pecial usage regarding file permission.…

Engineering

Computer Science

pecial usage regarding file permission. can you modify the permission by using OCTAL number?

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

Select everything wrong with this code segment. int main(int argc, char* argv[]) { FILE* fPtr = fopen(argv[0], "w"); } O A. It erases the program it's running from, which may cause a crash. O B. argv[0] may not be a file. OC. If no parameters are passed on the command line, the program won't execute. O D. fPtr is a reserved word and can't be used as a variable. E. file names used by fopen must be quoted constant strings F. argv[0] is not guaranteed to exist
int a[]=new int[5];a[5]=30/0;a. Go through the code and. Determine if there will occur anyexception? If yes, then describe what type of exception is itand why the exception will occur. [4]b. If there will occur exception, write the code that will handlethe exception. [4]
Write a function in python named "read_words" that declares a parameter for a filename and returns a collection of unique words in the file. Even though words.txt contains a single word per line, you should not assume that this is true of every file. For example, if the line is a sentence, you should split the line into individual words before storing each word in your collection. Handle any errors that occur by printing a detailed error message. Hint: the Python set works like Java's HashSet.
Assume that there is a data file named as “data.txt”. This data file contains integer values in multiple lines, as shown below. You are asked to write statements in the main() method to open the file, read and print out the total of all the values (should be 55). Place your code into try-catch block so that the FileNotFoundException will be caught and an error message will be printed if no such file exists. data.txt 1 2 3 4 5 6 7 8 9 10 import java.util.*; import java.io.*; public class ReadAndPrint { pubilc static void main() { // your code goes here }
Create an application that will catch an exception using the try catch block. Use Java as the language
What is a throw point? 2. What is an exception handler? 3. Explain the difference between a try block and a catch block. 4. What happens if an exception is thrown, but not caught? 5. Complete the following function that searches a numeric array for a specified value. The function should return the subscript of the element containing the value if it is found in the array. If the value is not found, the function should throw an exception. int searchArray(int array[], int size, int value){ int index = 0; // Used as an index to search array int subscript = -1; // To record position of search value while (index < size && subscript == -1) { if (array[index] == value) // If the value is found ___________________________________________________ ___________________________________________________ } if (subscript == -1) ___________________________________________________ return subscript; } Bonus…
Errors produced when calling 3. Find the maximum element from the BST or4. Find the minimum element from the BST before adding elements so the program should output 0(0) instead of an error "Exception in thread "main" java.lang.NullPointerException: Cannot read field "right" because "<local1>" is null at BST.findMax(BST.java:109) at BST.main(BST.java:194)" "Exception in thread "main" java.lang.NullPointerException: Cannot read field "left" because "<local1>" is null at BST.findMin(BST.java:118) at BST.main(BST.java:197)"
I would like to open a data file in Java for Exercise 6 in Chapter 4 of JAVA by Gaddis & Muganda. The file properties shows in Explorer the location as C: \Users\Vladi\Desktop. The Files is Exercise0406.txt. I inserted the lineFile file = new File(“C:\Users\Vladi\Desktop\Exercise0406.txt”);I get Exception cannot find file.
Please Show a solution
Suppose you have Java source files under the directorieschapter1, chapter2, . . . , chapter34. Write a program to remove the statement package chapteri; in the first line for each Java source file underthe directory chapteri. Suppose chapter1, chapter2,. . . , chapter34are under the root directory srcRootDirectory.The root directoryandchapteridirectory may contain other folders and files. Use the followingcommand to run the program:java Exercise12_20 srcRootDirectory
In UNIX, how would you remove the directory test and all files and subdirectories (recursively) in it? The directory test is located in (is a subdirectory of) /home/myid/smith/projects. O rmdir /home/myid/smith/projects/test O rmdir -r /home/myid/smith/projects/test rm -r /home/myid/smith/projects/test O rm -r projects/test
Python question: I have a .py file in another folder in the same directory how do I import that file into another .py file? For example, my directory folder is called "School_Work" I have 2 folders: Helper_Functions Main_Driver In my Helper_Functions folder I have the file called helper_functions.py and in my main driver I have a file called main.py. I want to import helper_functions.py into main.py. How do I do that?