Answer:
Explanation:
Important functions of an operating System:
Security –
The operating system uses password protection to protect user data and similar other techniques. it also prevents unauthorized access to programs and user data.
Control over system performance –
Monitors overall system health to help improve performance. records the response time between service requests and system response to have a complete view of the system health. This can help improve performance by providing important information needed to troubleshoot problems.
Job accounting –
Operating system Keeps track of time and resources used by various tasks and users, this information can be used to track resource usage for a particular user or group of user.
Error detecting aids –
Operating system constantly monitors the system to detect errors and avoid the malfunctioning of computer system.
Coordination between other software and users –
Operating systems also coordinate and assign interpreters, compilers, assemblers and other software to the various users of the computer systems.
Memory Management –
The operating system manages the Primary Memory or Main Memory. Main memory is made up of a large array of bytes or words where each byte or word is assigned a certain address. Main memory is a fast storage and it can be accessed directly by the CPU. For a program to be executed, it should be first loaded in the main memory. An Operating System performs the following activities for memory management:
It keeps tracks of primary memory, i.e., which bytes of memory are used by which user program. The memory addresses that have already been allocated and the memory addresses of the memory that has not yet been used. In multi programming, the OS decides the order in which process are granted access to memory, and for how long. It Allocates the memory to a process when the process requests it and deallocates the memory when the process has terminated or is performing an I/O operation.
Processor Management –
In a multi programming environment, the OS decides the order in which processes have access to the processor, and how much processing time each process has. This function of OS is called process scheduling. An Operating System performs the following activities for processor management.
Keeps tracks of the status of processes. The program which perform this task is known as traffic controller. Allocates the CPU that is processor to a process. De-allocates processor when a process is no more required.
Device Management –
An OS manages device communication via their respective drivers. It performs the following activities for device management. Keeps tracks of all devices connected to system. designates a program responsible for every device known as the Input/Output controller. Decides which process gets access to a certain device and for how long. Allocates devices in an effective and efficient way. Deallocates devices when they are no longer required.
File Management –
A file system is organized into directories for efficient or easy navigation and usage. These directories may contain other directories and other files. An Operating System carries out the following file management activities. It keeps track of where information is stored, user access settings and status of every file and more… These facilities are collectively known as the file system.
discuss the first three phases of program development cycle
Answer:
Known as software development life cycle, these steps include planning, analysis, design, development & implementation, testing and maintenance.
What type of device is a computer? Where does it use
Answer:A computer is an electronic device that manipulates information, or data. It has the ability to store, retrieve, and process data. You may already know that you can use a computer to type documents, send email, play games, and browse the Web.
Ms. Lawson, a primary school teacher, told her students that a photograph of the president is in the public domain. What does she mean by this?
Answer:
He belongs to the nation
Using the concepts of public and private domains, it means that the photograph of the president can be used by anyone without asking for permission.
---------------
Public and private domains:
If an image is of private domain, there is the need to ask the owner for the right to use the image.If it is of public domain, there is no need, as is the case for the president photo in this question.A similar question is given at https://brainly.com/question/12202794
It is common for people to name directories as dir1, dir2, and so on. When there are ten or more directories, the operating system displays them in dictionary order, as dir1, dir10, dir11, dir12, dir2, dir3, and so on. That is irritating, and it is easy to fix. Provide a comparator that compares strings that end in digit sequences in a way that makes sense to a human. First compare the part before the digit as strings, and then compare the numeric values of the digits.
Your program should work with the provided test program
DirectorySortDemo.java.
Call the class you write DirectoryComparator.java.
Submit the two files in your submission.
DirectoryComparator.java
DirectorySortDemo.java
import java.util.ArrayList;
import java.util.Arrays;
import java.util.collections;
public class DirectorySortDemo
{
public static void main (String [] args)
{
String dirNames ("dir12", "dir5", "dir9", "dirl", "dir4",
"lab10", "1ab2", "lab7", "lab17", "lab8",
"quiz8", "quiz10", "quiz11", "quiz12",
"dirll", "dir8", "dir7", "dir15", "dir3");
ArrayList directories = new
ArrayList<> (Arrays.asList (dirNames));
System.out.println ("Unsorted List:");
System.out.println (directories);
Collections.sort (directories, new DirectoryComparator ());
System.out.println ():
System.out-println ("Sorted List: ");
System.out.-println (directories);
Answer:
Here the code is given as follows,
Explanation:
How many ways are there to arrange the letters in the word ALGORITHMS? Note, the letter arrangement does not have to spell a word in the dictionary, but the new word must contain all the letters and each letter can be used only once.
there are ten letters in the word, so for the first position we can choose out of 10 option.
no matter wich specific option we choose, we will have 9 letters left for the 2nd letter.
and 8 for the third place.
...
when we will have used up 9 of 10 letters, there will be only one option for the last place.
the number of possible decision-paths is therefore given by this expression:
10*9*8*7*6*5*4*3*2*1
wich is 3,628,800
there are quite a few ways to rearrange 10 letters
The sorting method which commands entries in a going to head predicated on each character without regard to space as well as punctuation, therefore there are 3628800 ways.
The word 'ALGORITHMS' has 10 letters. There is no repeated letter so, the first Letter can hold 10 places if we start taking one letter at a time. The second can then hold nine positions, the third can hold eight, and so on.So, as [tex]\bold{ 10\times 9 \times 8.... \times 3 \times 2 \times 1 = 362,8800}[/tex] ways, we have such a total number of ways.
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SQLite is a database that comes with Android. Which statements is/are correct?
The content of an SQLite database is stored in XML formatted files because XML is the only file format supported by Android OS.
A SQLite database is just another name for a Content Provider. There is no difference as the SQLite implementation implements the Content Provider interface.
If an app creates an SQLite database and stores data in it, then all of the data in that particular database will be stored in one, single file.
A database query to an SQLite database usually returns a set of answers
To access individual entries, SQLite provides a so-called Cursor to enumerate all entries in the set.
This is yet another example of the Iterator pattern.
Answer:
1. Wrong as per my knowledge, SQLite may be an electronic database software that stores data in relations(tables).
2. Wrong. Content provider interface controls the flow of knowledge from your android application to an external data storage location. Data storage is often in any database or maybe it'll be possible to store the info in an SQLite database also.
3.Right. SQLite uses one file to store data. It also creates a rollback file to backup the stored data/logs the transactions.
4. Wrong. The queries are almost like a traditional electronic database system, the queries are going to be answered as per the conditions given and should return a group of answers or one answer depending upon the info and sort of query used.
5. Right. A cursor helps to point to one entry within the database table. this may be very helpful in manipulating the present row of the query easily.
Write a removeDuplicates() method for the LinkedList class we saw in lecture. The method will remove all duplicate elements from the LinkedList by removing the second and subsequent elements. If there is only one copy of an element, it is not removed. The list size should shrink accordingly based on the number of duplicates removed.
Answer:
removeDuplicates() function:-
//removeDuplicates() function removes duplicate elements form linked list.
void removeDuplicates() {
//declare 3 ListNode pointers ptr1,ptr2 and duplicate.
//initially, all points to null.
ListNode ptr1 = null, ptr2 = null, duplicate = null;
//make ptr1 equals to head.
ptr1 = head;
//run while loop till ptr1 points to second last node.
//pick elements one by one..
while (ptr1 != null && ptr1.next != null)
{
// make ptr2 equals to ptr1.
//or make ptr2 points to same node as ptr1.
ptr2 = ptr1;
//run second while loop to compare all elements with above selected element(ptr1->val).
while (ptr2.next != null)
{
//if element pointed by ptr1 is same as element pointed by ptr2.next.
//Then, we have found duplicate element.
//Now , we have to remove this duplicate element.
if (ptr1.val == ptr2.next.val)
{
//make duplicate pointer points to node where ptr2.next points(duplicate node).
duplicate = ptr2.next;
//change links to remove duplicate node from linked list.
//make ptr2.next points to duplicate.next.
ptr2.next = duplicate.next;
}
//if element pointed by ptr1 is different from element pointed by ptr2.next.
//then it is not duplicate element.
//So, move ptr2 = ptr2.next.
else
{
ptr2 = ptr2.next;
}
}
//move ptr1 = ptr1.next, after check duplicate elements for first node.
//Now, we check duplicacy for second node and so on.
//so, move ptr1 by one node.
ptr1 = ptr1.next;
}
}
Explanation:
Complete Code:-
//Create Linked List Class.
class LinkedList {
//Create head pointer.
static ListNode head;
//define structure of ListNode.
//it has int val(data) and pointer to ListNode i.e, next.
static class ListNode {
int val;
ListNode next;
//constructor to create and initialize a node.
ListNode(int d) {
val = d;
next = null;
}
}
//removeDuplicates() function removes duplicate elements form linked list.
void removeDuplicates() {
//declare 3 ListNode pointers ptr1,ptr2 and duplicate.
//initially, all points to null.
ListNode ptr1 = null, ptr2 = null, duplicate = null;
//make ptr1 equals to head.
ptr1 = head;
//run while loop till ptr1 points to second last node.
//pick elements one by one..
while (ptr1 != null && ptr1.next != null)
{
// make ptr2 equals to ptr1.
//or make ptr2 points to same node as ptr1.
ptr2 = ptr1;
//run second while loop to compare all elements with above selected element(ptr1->val).
while (ptr2.next != null)
{
//if element pointed by ptr1 is same as element pointed by ptr2.next.
//Then, we have found duplicate element.
//Now , we have to remove this duplicate element.
if (ptr1.val == ptr2.next.val)
{
//make duplicate pointer points to node where ptr2.next points(duplicate node).
duplicate = ptr2.next;
//change links to remove duplicate node from linked list.
//make ptr2.next points to duplicate.next.
ptr2.next = duplicate.next;
}
//if element pointed by ptr1 is different from element pointed by ptr2.next.
//then it is not duplicate element.
//So, move ptr2 = ptr2.next.
else
{
ptr2 = ptr2.next;
}
}
//move ptr1 = ptr1.next, after check duplicate elements for first node.
//Now, we check duplicacy for second node and so on.
//so, move ptr1 by one node.
ptr1 = ptr1.next;
}
}
//display() function prints linked list.
void display(ListNode node)
{
//run while loop till last node.
while (node != null)
{
//print node value of current node.
System.out.print(node.val + " ");
//move node pointer by one node.
node = node.next;
}
}
public static void main(String[] args) {
//Create object of Linked List class.
LinkedList list = new LinkedList();
//first we create nodes and connect them to form a linked list.
//Create Linked List 1-> 2-> 3-> 2-> 4-> 2-> 5-> 2.
//Create a Node having node data = 1 and assign head pointer to it.
//As head is listNode of static type. so, we call head pointer using class Name instead of object name.
LinkedList.head = new ListNode(1);
//Create a Node having node data = 2 and assign head.next to it.
LinkedList.head.next = new ListNode(2);
LinkedList.head.next.next = new ListNode(3);
LinkedList.head.next.next.next = new ListNode(2);
LinkedList.head.next.next.next.next = new ListNode(4);
LinkedList.head.next.next.next.next.next = new ListNode(2);
LinkedList.head.next.next.next.next.next.next = new ListNode(5);
LinkedList.head.next.next.next.next.next.next.next = new ListNode(2);
//display linked list before Removing duplicates.
System.out.println("Linked List before removing duplicates : ");
list.display(head);
//call removeDuplicates() function to remove duplicates from linked list.
list.removeDuplicates();
System.out.println("")
//display linked list after Removing duplicates.
System.out.println("Linked List after removing duplicates : ");
list.display(head);
}
}
Output:-
What is the future of marketing automation?
Answer:
give me number I will explain fast I am free now reply bro I am waiting
Answer:
To put it into simple words: the future of marketing automation is customers centric.
From data collection to lead generation, marketing automation will stay B2B marketers’ favorite in the future. Based on the current analytics, let’s have a look at how automation is driving lead generation today as well as what’s to come.
It’s going to be all about customersPersonalization will become even more importantMore Jobs and Activities Will Require Marketing AutomationGeneric Content Will Become Almost Non-ExistentMarketers Should Stay Current With Marketing Automation for Maximum ROIMarketing automation is a dynamic field and it will continue to evolve and transform processes in the future. If you in the marketing frontier, and looking to transform your lead generation processes, don’t be afraid to give marketing automation a shot.
Database multiple-choice question don't bs pls
Which of the following is not a common factor for database management system selection?
a. Cost
b. Features and tools
c. Software requirements
d. Hardware requirements
e. All of the above
f. None of the above
(D and F are wrong)
Answer:
f. None of the above
Explanation:
Considering the available options, the right answer is option F "None of the above."
Common factors for database management system selection are the following:
1. Cost: various DBMS vendors have different pricing, hence, interested buyers will consider the price before selections
2. Features and Tools: different types of DBMS have varied features and tools in carrying out the work.
3. Software requirements: there are various software requirements in various DBMS, such as encryption support, scalability, application-level data recovery, etc.
4. Hardware requirement: various DBMS vendors have different hardware requirements to consider, such as sizeable RAM, CPU value, etc.
Hence, in this case, the correct answer is option F.
Which line could be added to the lesson plan to strengthen the teacher’s point?
Different languages and communication styles might hinder your ability to benefit from global learning.
The digital divide will likely prevent you from having a major impact in the global communications environment.
Language and cultural differences will likely make it too frustrating to have an effective learning experience.
Learning in a global community enables you to expand your horizons and learn new languages.
Answer:
ムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダ
Answer:
Learning in a global community enables you to expand your horizons and learn new languages.
Explanation:
Im not sure what the teacher's point is, but the other options seem to hinder students from wanting to learn in a global community. If her goal is to convince students to learn globally then option D is your answer :)
State two ways of preventing virus attack on a computer.
Answer:
updating the computer and having an anti virus on your computer
Write a class Example() such that it has a method that gives the difference between the size of strings when the '-' (subtraction) symbol is used between the two objects of the class. Additionally, implement a method that returns True if object 1 is greater than object 2 and False otherwise when the (>) (greater than) symbol is used. For example: obj1
Answer:
Here the code is given as follows,
Explanation:
class Example:
def _init_(self, val):
self.val = val
def _gt_(self, other):
return self.val > other.val
def _sub_(self,other):
return abs(len(self.val) - len(other.val))
def main():
obj1 = Example('this is a string')
obj2 = Example('this is another one')
print(obj1 > obj2)
print(obj1 - obj2)
main()
Output:-
Alice sends a message to Bob in a manner such that Bob is the only person who can tell what the real message is. Which security concept is this an example of
Answer:
confidentiality
Explanation:
Alice sends a message to Bob in a manner such that Bob is the only person who can tell what the real message is. Which security concept is this an example of
This type of security concept is an example of confidentiality. Thus, option B is correct.
What is security?Security is the capacity to withstand possible damage from other individuals by placing restrictions on their right to act freely. The term security is the absence of threat or a sense of safety.
Any uncovered danger or weakness in any technology that could be exploited by criminals to compromise equipment or knowledge is a security threat.
It has to do with Alice’s ability to decide on their own how if, and why people exploit individual data if it is being sent to bob. To ensure human rights, welfare, and consciousness, solitude must be protected. People are able to independently create their own personalities.
Therefore, option B is the correct option.
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The question is incomplete, the complete question is:
a. message integrity
b. confidentiality
c. availability
d. non-repudiation
e. authentication
Register the countChars event handler to handle the keydown event for the textarea tag. Note: The function counts the number of characters in the textarea.
Do not enter anything in the HTML file, put your code in the JavaScript section where it says "Your solution goes here"
1 klabel for-"userName">user name: 2
3
Answer:
Explanation:
The following Javascript code is added in the Javascript section where it says "Your solution goes here" and counts the current number of characters in the text within the textArea tag. A preview can be seen in the attached image below. The code grabs the pre-created variable textareaElement and attached the onkeypress event to it. Once a key is pressed it saves the number of characters in a variable and then returns it to the user.
var textareaElement = document.getElementById("userName");
function textChanged(event) {
document.getElementById("stringLength").innerHTML = event.target.value.length;
}
// Your solution goes here
textareaElement.onkeypress = function() {
let numOfCharacters = textareaElement.value.length;
return numOfCharacters;
};
what operation can be performed using the total feature
They can do different surgery on people. One is called cataract total and hip replacement surgery which is what can be expected
HELP ASAP PLZZZZZ
Question 35(Multiple Choice Worth 5 points)
(03.01 LC)
To write a letter to your grandma using Word Online, which document layout should you choose?
APA Style Paper
General Notes
New Blank Document
Table of Contents
Answer:
third one
Explanation:
To write a letter to your grandma using Word Online, you should choose the "New Blank Document" layout.
What is Word?Microsoft Word is a word processing application. It is part of the Microsoft Office productivity software suite, along with Excel, PowerPoint, Access, and Outlook.
To write a letter to your grandmother in Word Online, select the "New Blank Document" layout. This will open a blank page on which you can begin typing your letter.
The "APA Style Paper" layout is intended for academic papers and includes formatting guidelines and section headings that a personal letter may not require.
In Word Online, "General Notes" is not a document layout option.
The "Table of Contents" feature generates a table of contents based on the headings in your document, but it is not a document layout option.
Thus, the answer is "New Blank Document".
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Write a program that reads a list of integers, and outputs those integers in reverse. The input begins with an integer indicating the number of integers that follow. For coding simplicity, follow each output integer by a comma, including the last one.Ex: If the input is:5 2 4 6 8 10the output is:10,8,6,4,2,To achieve the above, first read the integers into a vector. Then output the vector in reverse.
Answer:
The program in C++ is as follows:
#include <iostream>
#include <vector>
using namespace std;
int main(){
vector<int> intVect;
int n;
cin>>n;
int intInp;
for (int i = 0; i < n; i++) {
cin >> intInp;
intVect.push_back(intInp); }
for (int i = n-1; i >=0; i--) { cout << intVect[i] << " "; }
return 0;
}
Explanation:
This declares the vector
vector<int> intVect;
This declares n as integer; which represents the number of inputs
int n;
This gets input for n
cin>>n;
This declares intInp as integer; it is used to get input to the vector
int intInp;
This iterates from 0 to n-1
for (int i = 0; i < n; i++) {
This gets each input
cin >> intInp;
This passes the input to the vector
intVect.push_back(intInp); }
This iterates from n - 1 to 0; i.e. in reverse and printe the vector elements in reverse
for (int i = n-1; i >=0; i--) { cout << intVect[i] << " "; }