Answer:
B. Data Base Management System
Explanation:
A database management system (DBMS) can be defined as a collection of software applications that typically enables computer users to effectively and efficiently create, store, modify, retrieve, centralize and manage data or informations in a database. Generally, it allows computer users to efficiently retrieve and manage their data with an appropriate level of security.
Generally, a database management system (DBMS) acts as an intermediary between the physical data files stored on a computer system and any software application or program.
A data dictionary can be defined as a centralized collection of information on a specific data such as attributes, names, fields and definitions that are being used in a computer database system.
In a data dictionary, data elements are combined into records, which are meaningful combinations of data elements that are included in data flows or retained in data stores.
This ultimately implies that, a data dictionary found in a computer database system typically contains the records about all the data elements (objects) such as data relationships with other elements, ownership, type, size, primary keys etc. This records are stored and communicated to other data when required or needed.
Hence, a software that enables the organization to centralize data, manage the data efficiently while providing authorized users a significant level of access to the stored data, is called a Data Base Management System (DBMS).
A town decides to publicize data it has collected about electricity usage around the city. The data is freely available for all to use and analyze in the hopes that it is possible to identify more efficient energy usage strategies. Which of the following does this situation best demonstrate?
a. Citizen science.b. Crowdfunding.c. Open data.d. Machine Learning.
An electric kettle has the resistance of 30ohms what will flow when it connected to a 240v supply... find also the power rating of the power
Answer:
Power = 1920 Watts or 1.92 Kilowatts
Explanation:
Given the following data;
Resistance = 30 Ohms
Voltage = 240 Volts
To find power rating of the kettle;
Mathematically, the power consumption of an electric device is given by the formula;
Power = voltage²/resistance
Substituting into the formula, we have;
Power = 240²/30
Power = 57600/30
Power = 1920 Watts or 1.92 Kilowatts
Write a function definition for a function which takes one parameter and returns twice that parameter
Answer:
The function in python is as follows:
def twice(num):
return 2 * num
Explanation:
This defines the function; The function receives num as its parameter
def twice(num):
This returns twice of num
return 2 * num
Explain what the problems with the implementation of the function are, and show a way to fix them.// return true if two C strings are equalbool match(const char str1[], const char str2[]){bool result = true;while (str1 != 0 && str2 != 0) // zero bytes at ends{if (str1 != str2) // compare corresponding characters{result = false;break;}str1++; // advance to the next characterstr2++;}if (result) {result = (str1 == str2); // both ended at same time?}return( result );}int main(){char a[10] = "pointy";char b[10] = "pointless";if (match(a,b)){cout << "They're the same!" << endl;}}
Answer:
The code is not dereferencing the pointers. You have to place an asterisk in front of the pointer to read the value the pointer points to.
Explanation:
So "if (str1 != str2)" must be "if (*str1 != *str2)".
likewise:
while (*str1 != 0 && *str2 != 0)
and
result = (*str1 == *str2);
g Boolean Algebraic properties _____. a. are used to make boolean expressions more complicated b. are used to convert a Boolean equation to a circuit c. can lead to a simpler expression and thus a simpler circuit d. can be used with integer numbers
Answer:
c. can lead to a simpler expression and thus a simpler circuit.
Explanation:
Boolean logic refers to a theory of mathematics developed by the prominent British mathematician, called George Boole. In Boolean logic, all variables are either true or false and are denoted by the number "1" or "0" respectively; True = 1 or False = 0.
Also, Boolean logic allow users to combine keywords with Boolean operators (quotes, AND, OR, near/n) to give a more personalized and relevant search results.
There are five (5) main Boolean Algebraic properties and these includes;
I. Commutative property: it applies to both multiplication and addition.
For addition; A + B = B + AFor multiplication; A.B = B.AII. Associative property: it applies to both multiplication and addition.
For addition; A + (B + C) = (A + B) + CFor multiplication; A(BC) = (AB)CIII. Distributive property: it is formed using the product of a sum.
A(B + C) = AB + ACIV. Complement property: it involves a variable and its complement.
For addition: A + A' = 1For multiplication; A.A' = 0V. Identity property:
For addition; A + 0 = AFor multiplication; A.1 = AIn digital electronics, Boolean expressions are used to represent circuits which comprises of Boolean operations and as such simplifying any logic expression without changing or altering any of it's functionalities and properties based on given operations or variables.
Hence, Boolean Algebraic properties can lead to a simpler expression and thus a simpler circuit.
17.8.1: Writing a recursive math function. Write code to complete raise_to_power(). Note: This example is for practicing recursion; a non-recursive function, or using the built-in function math.pow(), would be more common.
Answer:
The recursion function is as follows:
def raise_to_power(num, power):
if power == 0:
return 1
elif power == 1:
return num
else:
return (num*raise_to_power(num, power-1))
Explanation:
This defines the function
def raise_to_power(num, power):
If power is 0, this returns 1
if power == 0:
return 1
If power is 1, this returns num
elif power == 1:
return num
If otherwise, it calculates the power recursively
else:
return (num*raise_to_power(num, power-1))
Write a program that grades arithmetic quizzes as follows: Ask the user how many questions are in the quiz. Ask the user to enter the key (that is, the correct answers). There should be one answer for each question in the quiz, and each answer should be an integer. They can be entered on a single line, e.g., 34 7 13 100 81 3 9 10 321 12 might be the key for a 10-question quiz. You will need to store the key in an array. Ask the user to enter the answers for the quiz to be graded. As for the key, these can be entered on a single line. Again there needs to be one for each question. Note that these answers do not need to be stored; each answer can simply be compared to the key as it is entered. When the user has entered all of the answers to be graded, print the number correct and the percent correct.
Answer:
The program in C++ is as follows:
#include <iostream>
using namespace std;
int main(){
int questions, answer;
cout<<"Questions: ";
cin>>questions;
int answerkey[questions];
cout<<"Enter answer keys: ";
for(int i = 0; i< questions; i++){
cin>>answerkey[i]; }
int correct = 0;
cout<<"Enter answers: ";
for(int i = 0; i< questions; i++){
cin>>answer;
if(answer == answerkey[i]){
correct++; } }
cout<<"Correct answers: "<<correct<<endl;
cout<<"Percentage correct : "<<(100 * correct)/questions<<"%";
return 0;
}
Explanation:
This declares the number of questions and the answers submitted to each equation
int questions, answer;
Prompt to get the number of questions
cout<<"Questions: ";
This gets input for the number of questions
cin>>questions;
This declares the answerkey as an array
int answerkey[questions];
Prompt to get the answer key
cout<<"Enter answer keys: ";
This iteration gets the answer key for each question
for(int i = 0; i< questions; i++){
cin>>answerkey[i]; }
This initializes the number of correct answers to 0
int correct = 0;
Prompt to get the enter the answers
cout<<"Enter answers: ";
This iterates through the answer keys
for(int i = 0; i< questions; i++){
This gets the answer to each question
cin>>answer;
This compares the answer to the answer key of the question
if(answer == answerkey[i]){
If they are the same, correct is incremented by 1
correct++; } }
Print the number of correct answers
cout<<"Correct answers: "<<correct<<endl;
Print the percentage of correct answers
cout<<"Percentage correct : "<<(100 * correct)/questions<<"%";
Question # 4
Fill in the Blank
Complete the following sentence.
The first email was sent in
.
Answer:
1971
Explanation:
If there is more detail needed i'm sorry
Answer:
1971
Explanation:
#Nova
Have a great day!
:)
List 2 end to end test commands.
Will mark Brainliest!!
Answer:
ibm pll
Explanation:
1. ¿Qué es un cursograma?
Answer:
Un cursograma permite representar gráficamente procedimientos administrativos. Constituyen instrumentos importantes para la visualización global y esquemática del conjunto de tareas administrativas.
Write code to take a String input from the user, then print the first and last letters of the string on one line. Sample run: Enter a string: surcharge se Hint - we saw in the lesson how to get the first letter of a string using the substring method. Think how you could use the .length() String method to find the index of the last character, and how you could use this index in the substring method to get the last character.
//import the Scanner class to allow for user input
import java.util.Scanner;
//Begin class definition
public class FirstAndLast{
//Begin the main method
public static void main(String []args){
//****create an object of the Scanner class.
//Call the object 'input' to receive user's input
//from the console.
Scanner input = new Scanner(System.in);
//****create a prompt to tell the user what to do.
System.out.println("Enter the string");
//****receive the user's input
//And store it in a String variable called 'str'
String str = input.next();
//****get and print the first character.
//substring(0, 1) - means get all the characters starting
//from the lower bound (index 0) up to, but not including the upper
//bound(index 1).
//That technically means the first character.
System.out.print(str.substring(0,1));
//****get and print the last character
//1. str.length() will return the number of character in the string 'str'.
//This is also the length of the string
//2. substring(str.length() - 1) - means get all the characters starting
// from index that is one less than the length of the string to the last
// index (since an upper bound is not specified).
// This technically means the last character.
System.out.print(str.substring(str.length()-1));
} // end of main method
} //end of class definition
Explanation:The code has been written in Java and it contains comments explaining important parts of the code. Kindly go through the comments.
The source code and a sample output have also been attached to this response.
To run this program, copy the code in the source code inside a Java IDE or editor and save it as FirstAndLast.java
What exactly is hyperloop, and how does it function?
Answer:
The Hyperloop system consists of sealed and partially evacuated tubes, connecting mobility hubs in large metropolitan areas, and pressurized vehicles, usually called pods, which can move at very high speeds, thanks to contactless levitation and propulsion systems as well as to the low aerodynamic drag.
Answer:
https://youtu.be/k-UdTsEpaw0
Explanation:
Justin Kace is promoting the metric system and wants people to be able to convert miles to kilometers and kilometers to miles. Develop a program that asks the user for a number of miles and converts miles to kilometers (multiplying miles by 1.609), and then asks for a number of kilometers and converts kilometers to miles (multiplying kilometers by 0.6214).
Solution :
//Program heading
Display "Kilometers to [tex]$\text{Miles}$[/tex] and [tex]$\text{Miles}$[/tex] to Kilometers Conversion Program"
//Get [tex]$\text{Miles}$[/tex]
Display "Enter the [tex]$\text{miles}$[/tex]: "
Input [tex]$\text{miles}$[/tex]
//Convert [tex]$\text{miles}$[/tex] to kilometers and display result
converted_km =[tex]$\text{miles}$[/tex] x 1.609
Display "Converted kilometers = " + converted_km
//Get Kilometers
Display "Enter the kilometers: "
Input km
//Convert kilometers to [tex]$\text{miles}$[/tex] and display result
converted_[tex]$\text{miles}$[/tex] = km x 0.6214
Display "Converted [tex]$\text{miles}$[/tex] = " + converted_[tex]$\text{miles}$[/tex]
//Thank the user for using this program
Display "Thank you for using this program. Good-bye!"
Stop
Sample Output:
Kilometers to [tex]$\text{Miles}$[/tex] and [tex]$\text{Miles}$[/tex] to Kilometers Conversion Program
Enter the [tex]$\text{miles}$[/tex]: 10
Converted kilometers = 16.09
Enter the kilometers: 10
Converted [tex]$\text{miles}$[/tex] = 6.214
Thank you for using this program. Good-bye!
if you were a developer of software, what kind of software package would you develop? why ?
Answer:
Software that would help my grandparents in the North end much money and help stop post harvest loss due to inadequate weather information Climate change etc
Explanation:
The app willbe able to tellif a soil is suitable forCropsthrough my othertechnologiesthat willcome with app it will alsodetect the whetherpattern accuratelyprovide securityin the farmand help farmers selltheir products online
In theory, a hacker with a small but powerful directional antenna could access a wireless network from more than one mile away. In a real-world situation, what is the more likely range involved
Cindy tried to delete a customer but the customer still had open invoices so the system would not allow her to delete the customer. More than likely ________ was enforced.
Answer:
The answer is "Referential integrity".
Explanation:
This relates to one aspect of data integrity. Data across multiple tables are linked via relationships. In view of the distinct customer & invoice tables, each invoice table should have the primary key specified throughout the Customer table, for instance. Whenever the invoice table contains a customer ID reference. This ID including its customer will be only a table of the customer.
. Write the advantages and disadvantages of CLI?
____________ RAM resides on the processor
Answer:
Brain of the computer i.e Random Access memory RAM resides on the processor
Explanation:
Brain of the computer i.e Random Access memory RAM resides on the processor. RAM is located in the central processing unit (CPU) also called processor which is located within the motherboard of the computer. It carry out the commands.
explain 5 important of using a word processor
Answer:
Spelling
Word processors contain an electronic spell checker. The student writer has immediate feedback about misspelled words. Student must discern which of the computer-generated spellings is correct for the context. Teachers no longer have to red-ink spelling errors. They can focus on the few exceptions the spellchecker does not catch.
Security
Teachers and students gain a sense of security about losing assignments. When the student saves her work, she avoids the possibility of the assignment being lost or misplaced. If an assignment is ever misplaced, a replacement can be easily printed.
Legibility
Teachers benefit by receiving a readable copy that is easy to grade. Students with poor handwriting can increase their scores with better looking papers. Students should be instructed to turn in copies of work in a readable font.
Publishing
Work done on a word processor can easily published on a bulletin board. Teachers can create electronic anthologies of their students' writings. Each student can receive an electronic copy of published works with no printing costs.
Mobility
Work done on a word processor and saved on the Internet is highly portable and accessible from any computer with Internet access. Dogs do not eat papers in cyberspace. "I forgot it at home" is irrelevant. Just log onto the nearest computer and your work appears on the screen.
Explanation:
Answer:
1. they are faster creation of document.
2.document can be stored for future use.
3. quality document are created.
4. it has access to higher variation.
5. tiredness Is greatly reduced.
In this lab, you complete a C++ program that uses an array to store data for the village of Marengo.
The program is described in Chapter 8, Exercise 5, in Programming Logic and Design. The program should allow the user to enter each household size and determine the mean and median household size in Marengo. The program should output the mean and median household size in Marengo. The file provided for this lab contains the necessary variable declarations and input statements. You need to write the code that sorts the household sizes in ascending order using a bubble sort and then prints the mean and median household size in Marengo. Comments in the code tell you where to write your statements.
Instructions
Make sure that the file HouseholdSize.cpp is selected and open.
Write the bubble sort.
Output the mean and median household size in Marengo.
Execute the program by clicking the Run button and the bottom of the screen.
Enter the following input, and ensure the output is correct. Household sizes: 4, 1, 2, 4, 3, 3, 2, 2, 2, 4, 5, 6 followed by 999 to exit the program.
Here is my code so far. I need help finishing it (printing the mean & median, etc). Thanks so much:
// HouseholdSize.cpp - This program uses a bubble sort to arrange up to 300 household sizes in
// descending order and then prints the mean and median household size.
// Input: Interactive.
// Output: Mean and median household size.
#include
#include
using namespace std;
int main()
{
// Declare variables.
const int SIZE = 300; // Number of household sizes
int householdSizes[SIZE]; // Array used to store 300 household sizes
int x;
int limit = SIZE;
int householdSize = 0;
int pairsToCompare;
bool switchOccurred;
int temp;
double sum = 0;
double mean = 0;
double median = 0;
// Input household size
cout << "Enter household size or 999 to quit: ";
cin >> householdSize;
// This is the work done in the fillArray() function
x = 0;
while(x < limit && householdSize != 999)
{
// Place value in array.
householdSizes[x] = householdSize;
// Calculate total of household sizes
sum+= householdSizes[x];
x++; // Get ready for next input item.
cout << "Enter household size or 999 to quit: ";
cin >> householdSize;
} // End of input loop.
limit = x;
// Find the mean
// This is the work done in the sortArray() function
pairsToCompare = limit - 1;
switchOccured = true;
while(switchOccured == true)
{
x = 0;
switchOccured == false;
while (x < pairsToCompare)
{
if(householdSizes[x]) > householdSizes[x+1])
{
//perform switch
}
x++;
}
pairsToCompare--;
}
// This is the work done in the displayArray() function
//Print the mean
// Find the median
median = (limit-1) / 2;
if (limit % 2 ==0)
{
cout << "Median is: " << (householdSizes[(int)median] + householdSizes[(int)median + 1]) / 2.0 << endl;
}
else {
// Print the median household size
}
// Print the median
return 0;
} // End of main function
Answer:
For the mean, do the following:
mean = sum/limit;
cout<<"Mean: "<<mean;
For the median do the following:
for(int i = 0; i<limit; i++) {
for(int j = i+1; j<limit; j++){
if(householdSizes[j] < householdSizes[i]){
temp = householdSizes[i];
householdSizes[i] = householdSizes[j];
householdSizes[j] = temp; } } }
median= (householdSizes[(limit-1)/2]+householdSizes[1+(limit-1)/2])/2.0;
if((limit - 1)%2==0){
median = householdSizes[limit/2];
}
cout<<endl<<"Median: "<<median;
Explanation:
The bubble sort algorithm in your program is not well implemented;
So, I replaced the one in your program with another.
Also, some variable declarations were removed (as they were no longer needed) --- See attachment for complete program
Calculate mean
mean = sum/limit;
Print mean
cout<<"Mean: "<<mean;
Iterate through each element
for(int i = 0; i<limit; i++) {
Iterate through every other elements forward
for(int j = i+1; j<limit; j++){
Compare both elements
if(householdSizes[j] < householdSizes[i]){
Reposition the elements if not properly sorted
temp = householdSizes[i];
householdSizes[i] = householdSizes[j];
householdSizes[j] = temp; } } }
Calculate the median for even elements
median= (householdSizes[(limit-1)/2]+householdSizes[1+(limit-1)/2])/2.0;
Calculate the median for odd elements
if((limit - 1)%2==0){
median = householdSizes[limit/2];
}
Print median
cout<<endl<<"Median: "<<median;
The Mac OS was the first to use a graphical user interface.
False
True
any computer and technology experts?
1. what is a file
2. what is a folder
3. what is a subfolder
4. how files are organized in folders and subfolders
5. what is a file extension
6. types of file extensions
7.the importance of file extensions
Answer:
file is the common storage unit in a computer, and all programs and data are "written" into a file and "read" from a file. A folder holds one or more files, and a folder can be empty until it is filled. A folder can also contain other folders, and there can be many levels of folders within folders.
a subfolder is an organizational folder on a computer that is located within another folder
Explanation:
sorry i dont know all
Please help I I decided to screen shot something in my laptop but now my screen isn’t working or moving can you give me a way to solve my problem this is for 24 points
Answer:
Just restart it. It would definitely work.
Explanation:
maybe try to do the discharge process?
close your laptop and take off your battery. then press on the power button for atleast 30 seconds or more. now put the battery back on and plug your laptop's charger in. then press power button......i think it'll open by then...I'm not sure tho
% Write a procedure that calculates the sum of the numbers in % a given range. The parameters to this procedure should be % as follows: % % 1. The low end of the range % 2. The high end of the range % 3. The sum of the values in the range % % If the low end equals the high end, then the sum should be % whatever value is equal to the low/high end (the range is % inclusive). If the low end is greater than the high end, % then failure should occur.
Answer:
The procedure in python 3 is as follows:
def add_range(low,high):
if low<= high:
total = 0
for i in range(low,high+1):
total+=i
return total
else:
return "Failure"
Explanation:
This defines the function/procedure
def add_range(low,high):
If low is less or equal to high
if low<= high:
Initialize total to 0
total = 0
Add up numbers in the range
for i in range(low,high+1):
total+=i
Return the total
return total
If low is greater, then return failure
else:
return "Failure"
What lets the computer's hardware and software work together?
Monitor
Central Processing Unit (CPU)
Computer Viruses
Operating System
Answer:
Operating System
Explanation:
The operating System lets the computer hardware and software work together.
Make me laugh or tell me riddles
Answer:
What do u call cow in earthquake??
Explanation:
Answer:
ok i made these by myself hope you like it
What is wrong with a MOV BL, CX instruction?
Answer:
The MOV bl , cx instruction is wrong because the contents of cx are to big for bl .
I think this is the answer.
Suppose a computer using set associative cache has 221 bytes of main memory, and a cache of 64 blocks, where each cache block contains 4 bytes. a) If this cache is 2-way set associative, what is the format of a memory address as seen by the cache, i.e., what are the sizes of the tag, set, and offset fields
Answer:
Tag = 1
Index = 5
Block offset = 2
Explanation:
From the given information:
The main memory bits(MM) = 221
number of block in the cache = 64 blocks
Block size = 4B
Recall that;
MM = log (memory size)
Thus;
main memory bits = log (221)
= 8 bits
Since this is a 2-way assoicative set;
the number of set in each cache = block size/2
64/2 = 32
Now, the index bit = log( no of set in each cache)
= log(32)
= 5 bits
Also since block size = 4B;
the block offset = log(4) = 2 bits
As such, tag = main memory bits - (index bit + block offset)
tag = 8 -(5 + 2)
tag = 8 -7
tag = 1
What can be viewed in the Tasks folder? Check all that apply
Answer: task details; appointments; to do list
Explanation:
Task folders, simply allows an individual organize their tasks in a logical manner. It performs an identical function just like a file directory.
Folders can be created in the root folder. Once can also create them as subfolder in the other files. The task details, appointments and the to do list can be viewed in the task folder.
Write a program to play the Card Guessing Game. Your program must give the user the following choices: 1. Guess only the face value of the card (guessFace() in face.cpp) 2. Guess only the suit of the card (guessSuit() in suit.cpp) 3. Guess both the face value and the suit of the card (guessBoth() in both.cpp) Before the start of the game, create a deck of cards. Before each guess use the function random_shuffle() (
Answer:
Hey bro I don't know such programs to write but I have number guessing game. Here:
Explanation: Built with python......
import random
while True:
x = True
while x:
num = input("type a limiting number ")
if num.isdigit():
print("lets play")
num = int(num)
meow = False
else:
print("Invalid input! Try agian.")
secret = random.randint(1, num)
guess = None
count = 1
while guess != secret:
guess = input("Please guess a number between 1 and " + str(num) + ":")
if guess.isdigit():
guess = int(guess)
if guess == secret:
print("You guessed correctly!")
else:
print("Oops wrong answer!! Try again..")
count += 1
print("it took you", count, "guesses", )