Answer:
(d) for (int n=0; n < HEIGHT; n++) { for (int m=0; m < WIDTH; m++) { anArray[n][m] = 0; }}
Explanation:
Given
HEIGHT [tex]\to[/tex] rows
WIDTH [tex]\to[/tex] columns
Required
Fill the array with zeros
Assume the array has already been declared
First, we iterate through the rows; using:
for (int [tex]n=0[/tex]; [tex]n < HEIGHT[/tex]; [tex]n++[/tex]) {
Next, we iterate through the columns
for (int [tex]m=0[/tex]; [tex]m < WIDTH[/tex]; [tex]m++[/tex]) {
Then we fill the array with the iterating variables of rows and the columns
anArray[n][m]
Lastly, close the loops
}}
When rating ads, I should only consider my personal feelings on the ad.
Answer:
yes when rating ads you should only consider your personal feelings on the ad
Suppose that you write a subclass of Insect named Ant. You add a new method named doSomething to the Ant class. You write a client class that instantiates an Ant object and invokes the doSomething method. Which of the following Ant declarations willnot permit this? (2 points)I. Insect a = new Ant ();II. Ant a = new Ant ();III. Ant a = new Insect ();1) I only2) II only3) III only4) I and II only5) I and III only
Answer:
5) I and III only
Explanation:
From the declarations listed both declarations I and III will not permit calling the doSomething() method. This is because in declaration I you are creating a superclass variable but initializing the subclass. In declaration III you are doing the opposite, which would work in Java but only if you cast the subclass to the superclass that you are initializing the variable with. Therefore, in these options the only viable one that will work without error will be II.
Suppose during a TCP connection between A and B, B acting as a TCP receiver, sometimes discards segments received out of sequence, but sometimes buffers them. Would the data sent by A still be delivered reliably and in-sequence at B? Explain why.
Answer:
Yes
Explanation:
We known that TCP is the connection [tex]\text{oriented}[/tex] protocol. So the TCP expects for the target host to acknowledge or to check that the [tex]\text{communication}[/tex] session has been established or not.
Also the End stations that is running reliable protocols will be working together in order to verify transmission of data so as to ensure the accuracy and the integrity of the data. Hence it is reliable and so the data can be sent A will still be delivered reliably and it is in-sequence at B.
what is a high level language?
Answer:
a high level language is any programming language that enables development of a program in a much more user friendly programming context and is generally independent of the computers hardware architecture.
Answer:
A high-level language is any programming language that enables development of a program in a much more user-friendly programming context and is generally independent of the computer's hardware architecture.
what is Microsoft word
Answer:
A software where you can document letters, essays or anything really.
Explanation:
Program to calculate series 10+9+8+...+n" in java with output
Answer:
import java.util.Scanner;
class Main {
public static int calcSeries(int n) {
int sum = 0;
for(int i=10; i>=n; i--) {
sum += i;
}
return sum;
}
public static void main(String[] args) {
Scanner reader = new Scanner(System.in);
int n = 0;
do {
System.out.print("Enter n: ");
n = reader.nextInt();
if (n >= 10) {
System.out.println("Please enter a value lower than 10.");
}
} while (n >= 10);
reader.close();
System.out.printf("sum: %d\n", calcSeries(n));
}
}
Show the result of inserting 10, 12, 1, 14, 6, 5, 8, 15, 3, 9, 7, 4, 11, 13, and 2, one at a time, into an initially empty binary heap. b. Show the result of using the linear-time algorithm to build a binary heap using the same input.
Show the result of performing three deleteMin operations in the heap of the previous exercise.
Answer:
Explanation:
A)
10 10 10 1 1
/ / \ --> / \ / \
12 12 1 12 10 12 10
/
14
1 1 1 1
/ \ / \ / \ / \
12 10 --> 6 10 6 10 --> 6 5
/ \ / \ / \ / / \ /
14 6 14 12 14 12 5 14 12 10
1 1 1 1
/ \ / \ / \ / \
6 5 6 5 6 5 --> 3 5
/ \ / \ / \ / \ / \ / \ / \ / \
14 12 10 8 14 12 10 8 14 12 10 8 6 12 10 8
/ / \ / \
15 15 3 15 14
After inserting all 1
/ \
3 2
/ \ / \
6 7 5 4
/ \ / \ / \ / \
15 14 12 9 10 11 13 8
b)
First level build : 10
/ \
12 1
/ \ / \
14 6 5 8
/ \ / \ / \ / \
15 3 9 7 4 11 13 2
Heap bottom level: 10
/ \
12 1
/ \ / \
3 6 4 2
/ \ / \ / \ / \
15 14 9 7 5 11 13 8
Heap next level up: 10
/ \
3 1
/ \ / \
12 6 4 2
/ \ / \ / \ / \
15 14 9 7 5 11 13 8
Final heap: 1
/ \
3 2
/ \ / \
12 6 4 8
/ \ / \ / \ / \
15 14 9 7 5 11 13 10
c)
Duing the first time,
First, assume the last element, the 8, is at the root and bubble down.
Then, assume the last element, the 13, is at the root and bubble down.
Then, assume the last element, the 11, is at the root and bubble down.
Final heap:
4
/ \
6 5
/ \ / \
13 7 10 8
/ \ / \ /
15 14 12 9 11
In the next iteration,
First, assume the last element, the 10, is at the root and bubble down.
Then, assume the last element, the 13, is at the root and bubble down.
Then, asssume the last element, the 11, is at the root and bubble down.
So, after performing all operations, the heap looks like below:
4
/ \
6 5
/ \ / \
12 7 10 8
/ \ / \ /
15 14 9 13 11
_____ is one of the Rs involved in design and implementation of any case-based reasoning (CBR) application.
Answer:
Group of answer choices
React
Reserve
Reason
Retain
I am not sure if its correct
Retain is one of the Rs involved in design and implementation of any case-based reasoning (CBR) application.
What is Case Based Reasoning?Case-based reasoning (CBR) is a known to be a form of artificial intelligence and cognitive science. It is one that likens the reasoning ways as primarily form of memory.
Conclusively, Case-based reasoners are known to handle new issues by retrieving stored 'cases' and as such ,Retain is one of the Rs that is often involved in design and implementation of any case-based reasoning (CBR) application.
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Write a recursive function that returns 1 if an array of size n is in sorted order and 0 otherwise. Note: If array a stores 3, 6, 7, 7, 12, then isSorted(a, 5) should return 1 . If array b stores 3, 4, 9, 8, then isSorted(b, 4) should return 0.int isSorted(int *array, int n){
Answer:
Here the code is given as follows,
Explanation:
Code:-
#include <stdio.h>
int isSorted(int *array, int n) {
if (n <= 1) {
return 1;
} else {
return isSorted(array, n-1) && array[n-2] <= array[n-1];
}
}
int main() {
int arr1[] = {3, 6, 7, 7, 12}, size1 = 5;
int arr2[] = {3, 4, 9, 8}, size2 = 4;
printf("%d\n", isSorted(arr1, size1));
printf("%d\n", isSorted(arr2, size2));
return 0;
}
Output:-
A computer with a five-stage pipeline deals with conditional branches by stalling for the next three cycles after hitting one. How much does stalling hurt the performance if 20% of all instructions are conditional branches
Answer:
The stalling hurt the performance by 60%.
Explanation:
This can be calculated as follows:
Value of CPI ideally taken by pipeline = 1
From the question, we are given:
Stall frequency = 20%,
Number of frequency = 3
Therefore, we have:
Cycles per instruction (CPI) of the architecture = Value of CPI ideally taken by pipeline + (Stall frequency * Number of frequency) = 1 + (20% * 3) = 1.60
Amount by which the stalling hurt the performance = Cycles per instruction (CPI) of the architecture Value of CPI ideally taken by pipeline = 1 - 0.60 = 0.60, or 60%
Therefore, the stalling hurt the performance by 60%.
Which of the following is a benefit of a digital network?
Security is enhanced.
Multiple devices can be connected.
Users are familiar with the software.
It makes using the internet easier.
Answer:
Multiple devices can be connected
The social network created through digital technology is referred to as a "digital network." It provides phone, video, data, and other network services for digital switching and transmission.
What is Digital network?In order to align the network with business demands, it has markets, data networks, and communications networks.
Digital networks' core are networking components like switches, routers, and access points. These tools are used to link networks to other networks, secure equipment like computers and servers connected to organizational networks, and analyze data being sent across networks.
Through cloud-enabled central administration, digital networks provide end-to-end network services for on-premises and cloud space. All network components are monitored, analyzed, and managed by a central server.
Therefore, The social network created through digital technology is referred to as a "digital network." It provides phone, video, data, and other network services for digital switching and transmission.
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LAB: Count characters - methods
Write a program whose input is a character and a string, and whose output indicates the number of times the character appears in the string.
Ex: If the input is
n Monday
the output is
1
Ex: If the input is
Today is Monday
the output is
0
Ex: If the input is
n it's a sunny day
the output is
0
Your program must define and call the following method that returns the number of times the input character appears in the input string public static int countCharacters (char userChar, String userString)
Note: This is a lab from a previous chapter that now requires the use of a method
LabProgram.java
1 import java.util.Scanner
2
3 public class LabProgram
4
5 /* Define your method here */
6
7 public static void main(String[] args) {
8 Type your code here: * >
9 }
10 }
Answer:
i hope understand you
mark me brainlist
Explanation:
using namespace std;
#include <iostream>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#define BLANK_CHAR (' ')
int CountCharacters(char userChar, char * userString)
{
int countReturn=0;
int n = strlen(userString);
for (int iLoop=0; iLoop<n; iLoop++)
{
if (userString[iLoop]==userChar)
{
countReturn++;
}
}
return(countReturn);
}
/******************************************
Removes white spaces from passed string; returns pointer
to the string that is stripped of the whitespace chars;
Returns NULL pointer is empty string is passed;
Side Effects:
CALLER MUST FREE THE OUTPUT BUFFER that is returned
**********************************************************/
char * RemoveSpaces(char * userString)
{
char * outbuff = NULL;
if (userString!=NULL)
{
int n = strlen(userString);
outbuff = (char *) malloc(n);
if (outbuff != NULL)
{
memset(outbuff,0,n);
int iIndex=0;
//copies non-blank chars to outbuff
for (int iLoop=0; iLoop<n; iLoop++)
{
if (userString[iLoop]!=BLANK_CHAR)
{
outbuff[iIndex]=userString[iLoop];
iIndex++;
}
} //for
}
}
return(outbuff);
}
int main()
{
char inbuff[255];
cout << " PLEASE INPUT THE STRING OF WHICH YOU WOULD LIKE TO STRIP WHITESPACE CHARS :>";
gets(inbuff);
char * outbuff = RemoveSpaces(inbuff);
if (outbuff !=NULL)
{
cout << ">" << outbuff << "<" << endl;
free(outbuff);
}
memset(inbuff,0,255);
cout << " PLEASE INPUT THE STRING IN WHICH YOU WOULD LIKE TO SEARCH CHAR :>";
gets(inbuff);
char chChar;
cout << "PLEASE INPUT THE CHARCTER YOU SEEK :>";
cin >> chChar;
int iCount = CountCharacters(chChar,inbuff);
cout << " char " << chChar << " appears " << iCount << " time(s) in >" << inbuff << "<" << endl;
}
Tips for Interactions with Personalized LinkedIn Outreach?
Answer:
Follow the best strategies for personalized LinkedIn outreach through 2021.
Run an Outreach Campaign for niche-specific People Collect Data about your Audience Keep your message short Save your Sale Pitches for later Give them a reason to reply to you
/*
Given a 2D board containing 'X' and 'O', capture all regions surrounded by 'X'.
A region is captured by flipping all 'O's into 'X's in that surrounded region .
For example,
X X X X
X O O X
X X O X
X O X X
After running your function, the board should be:
X X X X
X X X X
X X X X
X O X X
*/
public class Solution {
// This algorithm cannot solve the large test set
public void solve(char[][] board) {
// Start typing your Java solution below
// DO NOT write main() function
int rows = board.length;
if(rows == 0) return;
int cols = board[0].length;
for(int i = 0; i < cols; i++) {
// check first row's O
if(board[0][i] == 'O') {
// change it to other symbol
board[0][i] = '#';
dfs(board, 0, i);
}
// check the last row
if(board[rows - 1][i] == 'O') {
board[rows - 1][i] = '#';
dfs(board, rows - 1, i);
}
}
for(int i = 0; i < rows; i++) {
// check first col
if(board[i][0] == 'O') {
board[i][0] = '#';
dfs(board, i, 0);
}
// check last col
if(board[i][cols - 1] == 'O') {
board[i][cols - 1] = '#';
dfs(board, i, cols - 1);
}
}
// change O to X
changeTo(board, 'O', 'X');
// change # to O
changeTo(board, '#', 'O');
return;
}
public void dfs(char[][] board, int row, int col) {
// check up
if(row > 0) {
if(board[row - 1][col] == 'O') {
board[row - 1][col] = '#';
dfs(board, row - 1, col);
}
}
// check left
if(col > 0) {
if(board[row][col - 1] == 'O') {
board[row][col - 1] = '#';
dfs(board, row, col - 1);
}
}
// check right
if(row < board.length - 1) {
if(board[row + 1][col] == 'O') {
board[row+1][col] = '#';
dfs(board, row+1, col);
}
}
// check down
if(col < board[0].length - 1) {
if(board[row][col+1] == 'O'){
board[row][col+1] = '#';
dfs(board, row, col+1);
}
}
return;
}
public void changeTo(char[][] board, char from, char to) {
for(int i = 0; i < board.length; i++) {
for(int j = 0; j < board[0].length; j++) {
if(board[i][j] == from) {
board[i][j] = to;
}
}
}
return;
}
}
Which of the following are issues in data integration? (which would actually cause conflicts) Question 4 options: Two different databases may have different column names for the same actual information (e.g. customer ID vs customer-id). Databases on related subjects that you want to integrate may have different numbers of columns or rows. An attribute named 'weight' may be in different units in different databases. There may be discrepancies between entries in two different databases for the same actual real-life entity (e.g. for an employee).
Answer:
The observed issues in data integration include the following from the listed options:
Two different databases may have different column names for the same actual information (e.g. customer ID vs customer-id).
There may be discrepancies between entries in two different databases for the same actual real-life entity (e.g. for an employee).
Explanation:
Data integration aims at consolidating data from disparate sources into a single dataset provide users with consistent access to data that will meet their various needs. However, the process of data integration faces many challenges. One of the challenges is disparate data formats and sources. There is also the velocity or speed at which data are gathered. For successful data integration, the different datasets need to be cleaned and updated with quality data.
2.2 Write a program that uses input to prompt a user for their name and then welcomes them. Note that input will pop up a dialog box. Enter Sarah in the pop-up box when you are prompted so your output will match the desired output.
Answer:
Explanation:
The following program is written in Javascript. It creates a prompt that asks the user for his/her name and saves it in a variable called userName. Then it uses that variable to welcome the user. A test case is shown in the images below with the desired output.
let userName = prompt("Enter Your Name")
alert(`Hello ${userName}`)
Mối quan hệ giữa đối tượng và lớp
1. Lớp có trước, đối tượng có sau, đối tượng là thành phần của lớp
2. Lớp là tập hợp các đối tượng có cùng kiểu dữ liệu nhưng khác nhau về các phương thức
3. Đối tượng là thể hiện của lớp, một lớp có nhiều đối tượng cùng thành phần cấu trúc
4. Đối tượng đại diện cho lớp, mỗi lớp chỉ có một đối tượng
Answer:
please write in english i cannot understand
Explanation:
When computer users have trouble with their machines or software, Roland is the first person they call for help. Roland helps users with their problems, or refers them to a more-experienced IT employee. Roland holds the position of __________ in the organization. Support Analyst Systems Analyst Network Administrator Database Administator
Answer:
The correct answer is A) Support Analyst
Explanation:
From the question, we can see that Roland is familiar with both machines and software. He is familiar with the operations of both parts of a computer to the end that he can attempt a fix. And if he can't he knows who to refer the end-users to. Usually, some IT personnel that is more experienced.
From the above points, we can safely say that Roland is an IT Support Analyst. He cannot be the Systems analyst because Systems Analysts are usually at the top of the Pyramid. They take on problems that are referred upwards to them from support analysts.
Cheers
Please use thread to complete the following program: one process opens a file data.txt, then creates a thread my_thread. The job of the thread my_thread is to count how many lines exist in the file data.txt, and return the number of lines to the calling process. The process then prints this number to the screen.
Basically, you need to implement main_process.c and thread_function.c.
Basic structure of main_process.c:
int main ()
{
Open the file data.txt and obtain the file handler fh;
Create a thread my_thread using pthread_create; pass fh to my_thread;
Wait until my_thread terminates, using pthread_join;
Print out how many lines exist in data.txt.}
Basic structure of thread_function.c:
void *count_lines(void *arg)
{
Obtain fh from arg;
Count how many lines num_lines exist in fh;
Close fh;
Return num_lines
}
Answer:
Here is the code:-
//include the required header files
#include<stdio.h>
#include<pthread.h>
// method protocol definition
void *count_lines(void *arg);
int main()
{
// Create a thread handler
pthread_t my_thread;
// Create a file handler
FILE *fh;
// declare the variable
int *linecnt;
// open the data file
fh=fopen("data.txt","r");
// Create a thread using pthread_create; pass fh to my_thread;
pthread_create(&my_thread, NULL, count_lines, (void*)fh);
//Use pthread_join to terminate the thread my_thread
pthread_join( my_thread, (void**)&linecnt );
// print the number of lines
printf("\nNumber of lines in the given file: %d \n\n", linecnt);
return (0);
}
// Method to count the number of lines
void *count_lines(void *arg)
{
// variable declaration and initialization
int linecnt=-1;
char TTline[1600];
//code to count the number of lines
while(!feof(arg))
{
fgets(TTline,1600,arg);
linecnt++;
}
pthread_exit((void *)linecnt);
// close the file handler
fclose(arg);
}
Explanation:
Program:-
Explain why interrupt times and dispatch delays must be limited to a hard real-time system?
Answer:
The important problem is explained in the next section of clarification.
Explanation:
The longer it is required for a computing device interrupt to have been performed when it is created, is determined as Interrupt latency.
The accompanying duties include interrupt transmission delay or latency are provided below:
Store the instructions now being executed.Detect the kind of interruption.Just save the present process status as well as activate an appropriate keep interrupting qualitative functions.You are developing a Windows forms application used by a government agency. You need to develop a distinct user interface element that accepts user input. This user interface will be reused across several other applications in the organization. None of the controls in the Visual Studio toolbox meets your requirements; you need to develop all your code in house.
Required:
What actions should you take?
Answer:
The answer is "Developing the custom control for the user interface"
Explanation:
The major difference between customized control & user control would be that it inherit throughout the inheritance tree at different levels. Usually, a custom power comes from the system. Windows. UserControl is a system inheritance.
Using accuracy up is the major reason for designing a custom UI control. Developers must know how to use the API alone without reading the code for your component. All public methods and features of a custom control will be included in your API.
my mom hid my laptop and now I can't find it
Answer: did you look everywhere ask for it and be like mom i wont do (whatever you did) ever again so please give me a chance can i plsss!!!!!! have it back?
Explanation:
simple as that step by step
Identify and differentiate between the two (2) types of selection structures
Answer:
there are two types of selection structure which are if end and if else first the differentiation between if and end if else is if you want your program to do something if a condition is true but do nothing if that condition is false then you should use an if end structure whereas if you want your program to do something if a condition is true and do something different if it is false then you should use an if else structure
Write a function int checkBalance(char exp[]); that can take an expression as input and check whether the parenthesis used in that expression are valid or invalid. It returns 1 if it is valid, and returns 0 if it is not valid.For example, the following expressions are valid: [ A * {B (C D)}] and [{()()}]The following expressions are invalid: [ A * {B (C D})], [ { ( ] ) ( ) }
Answer:
Explanation:
The following code is written in Java. It uses for loops to loop through the array of characters, and uses IF statements to check if the symbols in the expression are balanced. If so it returns true, otherwise it breaks the function and returns false. Two test cases have been provided in the main method and the output can be seen in the attached image below.
import java.util.ArrayList;
class Brainly {
public static void main(String[] args) {
char[] exp = { '[', 'A', '*', '{', 'B', '(', 'C', 'D', ')', '}', ']'};
char[] exp2 = {'[', 'A', '*', '(', 'C', '}', ']'};
System.out.println(checkBalance(exp));
System.out.println(checkBalance(exp2));
}
public static boolean checkBalance(char exp[]) {
ArrayList<Character> symbols = new ArrayList<>();
for (char x: exp) {
if ((x =='[') || (x == '{') || (x == '(')) {
symbols.add(x);
}
if (x ==']') {
if (symbols.get(symbols.size()-1) == '[') {
symbols.remove(symbols.size()-1);
} else {
return false;
}
}
if (x =='}') {
if (symbols.get(symbols.size()-1) == '{') {
symbols.remove(symbols.size()-1);
} else {
return false;
}
}
if (x ==')') {
if (symbols.get(symbols.size()-1) == '(') {
symbols.remove(symbols.size()-1);
} else {
return false;
}
}
}
return true;
}
}
how an operating system allocates system resources in a computer
Answer:
The Operating System allocates resources when a program need them. When the program terminates, the resources are de-allocated, and allocated to other programs that need them
Write a program named edit_data.py that asks a person their age. Accept an int. Use a custom exception to return a message if the number entered is an int that is less than 1 or greater than 115. Create an exception that catches an error if a non int is entered.
An error that occurs while a program is being run is an exception. Non-programmers see exceptions as examples that do not follow a general rule.
What is the programming?
In computer science, the term "exception" also has the following connotation: It signifies that the issue is an uncommon occurrence; it is the "exception to the rule." Some programming languages use the mechanism known as exception handling to deal with problems automatically. Exception handling is built into several programming languages, including C++, Objective-C, PHP, Java, Ruby, Python, and many others.
In order to manage errors, programs often save the state of execution at the time the problem occurred and interrupt their usual operation to run an exception handler, which is a particular function or section of code. Depending on the type of error that had occurred, the error handler can "correct" the issue and the application can then continue using the previously saved data.
Thus, An error that occurs while a program is being run is an exception.
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You have recently subscribed to an online data analytics magazine. You really enjoyed an article and want to share it in the discussion forum. Which of the following would be appropriate in a post?
A. Including an advertisement for how to subscribe to the data analytics magazine.
B. Checking your post for typos or grammatical errors.
C. Giving credit to the original author.
D. Including your own thoughts about the article.
Select All that apply
Answer:
These are the things that are would be appropriate in a post.
B. Checking your post for typos or grammatical errors.
C. Giving credit to the original author.
D. Including your own thoughts about the article.
Explanation:
The correct answer options B, C, and D" According to unofficial online or internet usage it is believed that sharing informative articles is a reasonable use of a website forum as much the credit goes back to the actual or original author. Also, it is believed that posts should be suitable for data analytics checked for typos and grammatical errors.
how to Write a simple Java socket programming that a client sends a text and server receives and print.
Answer:
Java Socket programming is used for communication between the applications running on different JRE.
Java Socket programming can be connection-oriented or connection-less.
Socket and ServerSocket classes are used for connection-oriented socket programming and DatagramSocket and DatagramPacket classes are used for connection-less socket programming.
The client in socket programming must know two information:
IP Address of Server, and
Port number.
Here, we are going to make one-way client and server communication. In this application, client sends a message to the server, server reads the message and prints it. Here, two classes are being used: Socket and ServerSocket. The Socket class is used to communicate client and server. Through this class, we can read and write message. The ServerSocket class is used at server-side. The accept() method of ServerSocket class blocks the console until the client is connected. After the successful connection of client, it returns the instance of Socket at server-side.
Explanation:
Creating Client:
import java.io.*;
import java.net.*;
public class MyServer {
public static void main(String[] args){
try{
ServerSocket ss=new ServerSocket(6666);
Socket s=ss.accept();//establishes connection.
DataInputStream dis=new DataInputStream(s.getInputStream());
The valid call to the function installApplication is
void main( )
{
// call the function installApplication
}
void installApplication(char appInitial, int appVersion)
{
// rest of function not important
}
Answer:
B. installApplication(‘A’, 1);
Explanation:
Given
The above code segment
Required
The correct call to installApplication
The function installApplication is declared as void, meaning that it is not expected to return anything.
Also, it receives a character and an integer argument.
So, the call to this function must include a character and an integer argument, in that order.
Option D is incorrect because both arguments are integer
Option C is incorrect because it passes no argument to the function.
Option A is incorrect because it receives an integer value from the function (and the function is not meant not to have a return value).
Option B is correct
the id selector uses the id attribute of an html element to select a specific element give Example ?
Answer:
The id selector selects a particular html element
Explanation:
The id selector is uses the id attribute to select a specific html element. For example, if we have a particular header which is an html element and we want to give it a particular background color, we use the id selector and give it an id attribute in the CSS file. An example of an html header with id = 'blue' is shown below. The style sheet is an internal style sheet.
!doctype html
<html>
<head>
<title>Test</title>
<style>
#blue { background-color: blue;
}
</style>
</head>
<body>
<h1 id = 'blue'>Our holiday</h1>
<p>This is the weekend</p>
</body>
</html>