identification and authentication in local and distributed systems

Answer:

def population_density(dictionary_list):

     """ this function calculates the population density of a list of countries"""

    total_population= 0

    total_area= 0

    for country in dictionary_list:

           total_population += country['population']

           total_area += country['area']

    population_density = total_population / total_area

    return population_density

Explanation:

In python, functions are defined by the "def" keyword and a dictionary is used to hold immutable data key and its value. The for loop is used to loop through the list of dictionaries and the values of the country data and extracted with bracket notation.

Answer:

Here is the Python program:

def scores(file):  # method scores that takes a file name as parameter and returns the sum and average of scores in a file

   with open(file, 'r') as infile:  # open the file in read mode

       lines = [score.split() for score in infile]  # split the scores into a list

       print("The scores are:",lines)  #print the scores

       for line in lines:  # loops through each score

           total= sum(int(score) for score in line)  # adds the scores

           average =total/len(line) # computes average by taking sum of scores and dividing by number of scores in file

       print("The sum is:", total)  #prints the sum of scores

       print("The average is:", "{:.2f}".format(average))   #prints the average

filename = input("Enter name of the file: ")  #prompts user to enter name of file

scores(filename) #calls scores method by passing the file name to it in order to compute sum and average of file contents i.e. scores

Explanation:

It is assumed that the scores in the file are separated by a blank space.

The scores() method takes a file name as parameter. Then it opens that input file in read mode using object infile.

split() method is used to split the scores in a file into a list. Suppose the scores are 1 2 3 4 5 6 . So after the split, they become ['1', '2', '3', '4', '5', '6']  

The loop iterates through each score in the file, splits them into a list and stores this list in lines. The next print statement prints these scores in a list.

The second loop for line in lines iterates through each score of the list and the statements: total= sum(int(score) for score in line)  and average =total/len(line) computes the total and average of scores.

total= sum(int(score) for score in line)  statement works as follows:

for loop iterates through each element of list i.e. each score

int() converts that string element into integer.

sum() method adds the integers to compute their total.

So if we have  ['1', '2', '3', '4', '5', '6']  each element i.e. 1,2,3,4,5,6 is converted to integer by int() and then added together by sum method. So this becomes 1+2+3+4+5+6 = 21. This result is stored in total. Hence

total = 21.

average = total/len(line) works as follows:

The computed sum of scores stored in total is divided by the number of scores. The number of scores is computed by using len() method which returns the length of the line list. So len() returns 6. Hence

average = total/len(line)

              = 21 / 6

average = 3.5

The next two print statement prints the value of sum and average and "{:.2f}".format(average)) prints the value of average up to 2 decimal places.

The screenshot of the program along with its output is attached.

Answer:

grep -R  '^foobar'.c > variable && grep -R  'foobar$'.c >> variable

echo $variable | ls -n .

Explanation:

Bash scripting is a language used in unix and linux operating systems to interact and automate processes and manage files and packages in the system. It is an open source scripting language that has locations for several commands like echo, ls, man etc, and globbing characters.

The above statement stores and appends data of a search pattern to an already existing local variable and list them numerically as standard out 'STDOUT'.

Answer:

A Larger Market

Customer Insights Through Tracking And Analytics

Fast Response To Consumer Trends And Market Demand

Lower Cost

More Opportunities To "Sell"

Personalized Messaging

Hope this helps!

Answer:

Title

Explanation:

the others describe other items in a database

Answer:

Title

Explanation: idek but I got it correct on a quiz

Answer:I think greater. Answer my question that I posted plz

Explanation:

Answer:

B. Containerization.

Explanation:

In this scenario, management wants to ensure any sensitive data on company-provided cell phones is isolated in a single location that can be remotely wiped if the phone is lost. The technology which best meets this need is containerization.

In Computer science, containerization can be defined as a process through which software applications are used or operated in an isolated space (environment). It uses an operating system level virtualization method, such as a single host OS kernel, UFS, namespaces, Cgroups, to run software applications.

Hence, using the containerization technology makes it easy to wipe off the cell phones if lost because it is isolated in a single location.

Answer:

Bluetooth or a wifi router or a gateway

Explanation:

Answer: Option D -- Sorting an already sorted array of size n with quicksort takes O(n log n) time.

Explanation:

Sorting an already sorted array of size n with quicksort takes O(n log n) time is true about sorting functions while other options are wrong.

Answer:

sfadasda

Explanation:

dsadasdadas

Answer:

The programming language is not stated; However, the program written in C++ is as follows: (See Attachment)

#include<iostream>

using namespace std;

string capt(string result)

{

result[0] = toupper(result[0]);

for(int i =0;i<result.length();i++){

 if(result[i]=='.' || result[i]=='?' ||result[i]=='!')  {

 if(result[i+1]==' ') {

  result[i+2] = toupper(result[i+2]);

 }

 if(result[i+2]==' ')  {

  result[i+3] = toupper(result[i+3]);

 }

 } }

return result;

}

int main(){

string sentence;

getline(cin,sentence);

cout<<capt(sentence);

return 0;

}

Explanation:

The method to capitalize first letters of string starts here

string capt(string result){

This line capitalizes the first letter of the sentence

result[0] = toupper(result[0]);

This iteration iterates through each letter of the input sentence

for(int i =0;i<result.length();i++){

This checks if the current character is a period (.), a question mark (?) or an exclamation mark (!)

if(result[i]=='.' || result[i]=='?' ||result[i]=='!')  {

 if(result[i+1]==' '){  ->This condition checks if the sentence is single spaced

  result[i+2] = toupper(result[i+2]);

-> If both conditions are satisfied, a sentence is detected and the first letter is capitalized

 }

 if(result[i+2]==' '){ ->This condition checks if the sentence is double spaced

  result[i+3] = toupper(result[i+3]);

-> If both conditions are satisfied, a sentence is detected and the first letter is capitalized

 }

}

}  The iteration ends here

return result;  ->The new string is returned here.

}

The main method starts here

int main(){

This declares a string variable named sentence

string sentence;

This gets the user input

getline(cin,sentence);

This passes the input string to the method defined above

cout<<capt(sentence);

return 0;

}

Answer:

The completed program is

def color_translator(color):

      if color == "red":

             hex_color = "#ff0000"

      elif color == "green":

             hex_color = "#00ff00"

      elif color == "blue":

             hex_color = "#0000ff"

      else:

             hex_color = "unknown"

      return hex_color

Explanation:

Since the parameter in the above function is color,

This variable will serve as the name of a color and it'll be used in the conditional statements to check if the name of color is any of red, green and blue;

And that is why we have

if color == "red":

elif color == "green":

elif color == "blue":

The variable used to hold the color codes, hex_color, will be returned at the end of the function and that's why we have

return hex_color

When the program is tested with print(color_translator("blue")) and others, it prints the desired output

Answer:

Internal Storage

This has to do with the primary memory of a computer that is used to store the user's files, applications, etc. This is where the Operating System and pre-installed software is installed. There are two types of internal memory which are ROM and RAM.

Properties

External Storage

These are secondary memory that is not primarily permanently attached to the computer. This is a device that contains all the addressable data storage which are not inside the computer's storage. Some examples of external storage are flash drives, CD ROMs, etc.

Properties

Answer:

import numpy as np

def equals(list1, list2 ):

     compare = np.all( list1, list2)

     if ( compare == True):

           print ( "Equals")

     else :

           print(" Not Equals")

Explanation:

This python function utilizes the numpy package to compare two list items passed as its argument. It prints out "equals" for a true result and "not equal" for a false result.

Explanation:

Binary Search Tree is also called ordered tree or sorted binary tree. In the tree each node contains smaller values in the left side of the subtree and larger values in the right side of  the subtree.

Answer:

A. True

Explanation:

The correct option is A. True.

Actually, in using cloud infrastructures, the client necessarily cedes control to the CP on a number of issues which may affect security. It may have to restrict port scans and even penetration testing. Moreover, the service level agreements may not actually guarantee commitment to offer such services on the part of the CP. This may result in leaving a gap in security defenses.

Also, when the control of the CP changes, it's evident that the terms and conditions of their services may also change which may affect security.

Answer:

No-force policy

Explanation:

The policy that allows a transaction to commit even if it has modified some blocks that have not yet been written back to disk is called the _NO-FORCE_ policy.

In data theory, the No-Force Policy is beneficial for the control of transaction. In this policy, when a transaction commits, changes that are made are not required to be written to disk in place. The changes recorded are preserved in order to make transaction durable. The recorded changes must be preserved at commit time.

Answer:

the higher order bits in AL will be true

Explanation:

We know from the truth table that in an OR operation, once one operand is true the result is true, no matter the value of the other operand. From the above AL will have the higher order bits to be true since the first four higher order bits are 1s, 1111_0000, this is regardless of the original values of AL. We cannot however ascertain if the lower bits of AL are true from this. Note 1 evaluates to true while 0 is false

Answer:

Here is the Python program:

user_tweet = input()

decoded_tweet = user_tweet.replace('TTYL', 'talk to you later')

print(decoded_tweet)

Explanation:

The program works as follows:

Suppose the input is:    'Gotta go. I will TTYL'

This is stored in user_tweet. So

user_tweet = 'Gotta go. I will TTYL'

The statement: user_tweet.replace('TTYL', 'talk to you later')  uses replace() method which is used to replace a specified string i.e. TTYL with another specified string i.e. talk to you later in the string stored in user_tweet.

The first argument of this method replace() is the string or phrase that is to be replaced and the second argument is the string or phrase that is to replace that specified string in first argument.

So this new string is assigned to decoded_tweet, after replacing 'TTYL' with 'talk to you later' in user_tweet.

So the print statement print(decoded_tweet) displays that new string.

Hence the output is:

Gotta go. I will talk to you later.

Answer:

Here is the corrected code: The screenshot of the program along with its output is attached. The comments are written with each line of the program for better understanding of the code.

CarRental.java

public class CarRental  {  //class name

//below are the data members name, zipcode, size, dFee, days and total

String name;  

int zipcode;

String size;

double dFee;

int days;

double total;  

public String getName()  {  //accessor method to get the name

return name; }

public int getZipcode()  { //accessor method to get the zipcode

return zipcode; }

public String getSize() {  //accessor method to get the size

return size; }

public int getDays() {  //accessor method to get the days

return days;  }

public CarRental(String size)  {  //constructor of CarRental class

if(size.charAt(0)=='e')  // checks if the first element (at 0th index) of size data member is e

     dFee = 29.99;  // sets the dFee to 29.99

  else if(size.charAt(0)=='m')  // checks if the first element (at 0th index) of size data member is m

     dFee = 38.99;  // sets the dFee to 38.99

  else   // checks if the first element (at 0th index) of size data member is f

     dFee =43.50;  // sets the dFee to 43.50

   }

public void calculateTotal(int days) {  //method calculateTotal of CarRental

total = dFee*days;  }  //computes the rental fee

public void print()   {  //method to display the total rental fee

System.out.println("Your rental total cost is: $" + total);  } }

Explanation:

LuxuryCarRental.java

import java.util.*;

public class LuxuryCarRental extends CarRental {  //class LuxuryCarRental that is derived from class CarRental

public LuxuryCarRental(String size, int days) {  // constructor of LuxuryCarRental

super(size);}   //used when a LuxuryCarRental class and CarRental  class has same data members i.e. size

public void calculateTotal() {  //overridden method

super.calculateTotal(days); // used because CarRental  and LuxuryCarRental class have same named method i.e.  calculateTotal

dFee = 79.99;  //sets the rental fee at $79.99 per day

total = dFee;  }  //sets total to rental fee value

public void print(){  //overridden method

   int chauffeur;  // to decide to include chauffeur

Scanner keyboard = new Scanner(System.in);  //used to take input from user

System.out.println("Do you want to add a chauffeur for $200? Enter 0 for"

+ " yes and 1 for no");  // prompts the user to respond to the option of including a chauffeur at $200 more per day

chauffeur = keyboard.nextInt();   //reads the input option of chauffeur from user

if(chauffeur==1)  //if user enters 1 which means user does not want to add a chauffeur

total = dFee;  //then set the value of dFee i.e.  $79.99  to total

else  //if user enters 0 which means user wants to add a chauffeur

total = dFee + 200;  //adds 200 to dFee value and assign the resultant value to total variable

System.out.println("Your rental total cost is: $" + total);  }  } //display the total rental fee

UseCarRental.java

import java.util.*;

public class UseCarRental{ //class name

public static void main(String[] args){ //start of main() function body

String name, size; // declare variables

int zipcode, days; //declare variables

Scanner keyboard = new Scanner(System.in); // to take input from user

System.out.println("Enter total days you plan on renting: "); //prompts user to enter total days of rent

days = keyboard.nextInt(); // reads value of days from user

System.out.println("Enter your name: "); //prompts user to enter name

name = keyboard.next(); //reads input name from user

System.out.println("Enter your billing zipcode: "); // prompts user to enter zipcode

zipcode = keyboard.nextInt(); //reads input zipcode from user

System.out.println("Enter the size of the car: "); // prompts user to enter the value of size

size = keyboard.next(); //reads input size from user

CarRental economy = new CarRental(size); //creates an object i.e. economy of class CarRental

economy.calculateTotal(days); //calls calculateTotal method of CarRental using instance economy

economy.print(); //calls print() method of CarRental using instance economy

LuxuryCarRental fullsize = new LuxuryCarRental(size, days);  //creates an object i.e. fullsize of class LuxuryCarRental

fullsize.calculateTotal();  //calls calculateTotal method of LuxuryCarRental using instance fullsize

fullsize.print(); }} //calls print() method of LuxuryCarRental using instance fullsize      

Answer:

system unit

Explanation:

A system unit is the part of a computer that contains the brain or central processing unit. The primary device such as central processing unit as contained in the system unit perform operations hence produces result for complex calculations.

The system unit also house other main components of a computer system like hard drive , CPU, motherboard and RAM. The major work that a computer is required to do or performed is carried out by the system unit. Other peripheral devices are the keyboard, monitor and mouse.

Answer:

Without it information flow is impossible

Explanation:

The word 'pivotal' also means crucial or vital, and so we need to consider what an operating system actually does.

Remember, merely having all the hardware of a computer would not allow you to run (install and use) programs. It is by means of an operating system that teaching programs can be installed, and it is also by means of an operating system learning can take place.

For example, a student can decode (learn) instructions/lessons from his teacher via a software program; and the software program needs an operating system to open (run) the program.

Answer:

Explanation: Research has proven that ;

The memory cell is also known as the  fundamental building block of computer memory.

It stores one bit of binary information and it must be set to store a logic 1 (high voltage level) and reset to store a logic 0 (low voltage level).

Answer:

Which sentence best matches the context of the word reticent as it is used in the following example?

We could talk about anything for hours. However, the moment I brought up dating, he was extremely reticent about his personal life.

Explanation:

Which sentence best matches the context of the word reticent as it is used in the following example?

We could talk about anything for hours. However, the moment I brought up dating, he was extremely reticent about his personal life.

Answer and Explanation:

The sequential data or sequence data is described as data that come in an ordered sequence. It may also be termed data that is produced from tasks that occurs in sequential order The sequential pattern mining is a critical subject in data mining that has do with applying sequential data to derive a statistically relevant pattern from it.

Sequential pattern mining is a part of data mining. Data mining involves utilizing data from databases to understand and make decisions that better the organization or society as a whole based on this. Common data mining tasks include: clustering, classification, outlier analysis, and pattern mining.

Pattern mining is a kind of data mining task that involves explaining data through finding useful patterns from data in databases. Sequential pattern mining is pattern mining that uses sequential data as a source of data in finding data patterns. Sequential pattern mining applies various criteria(which maybe subjective) in finding "subsequence" in data. Criteria could be :frequency, length, size, time gaps, profit etc. Sequential pattern mining is commonly applicable in reality since a sizeable amount of data mostly occur in this form. A popular type of sequential data is the time series data.

Answer:

Count

Explanation:

Let's see which function does what:

SUM

COUNT

SQRT

SORT

As we see, Count is the function that gets the number of entries.

Answer:

Explanation:

Tells how many numeric entries are there.

Answer:

Authorization

Explanation:

Answer:

def convert_to_string(nums):

   for i in range(len(nums)):

       nums[i] = str(nums[i])

nums = [7, 28, 92]

print(nums)

convert_to_string(nums)

print(nums)

Explanation:

Create a function called convert_to_string that takes one parameter, nums

Create a for loop that iterates through the nums. Inside the loop, set each item to its string equivalent using type casting (str)

Initialize a list

Print the list before the function call

Call the function, passing the list as a parameter

Then, print the list again to see the difference

Answer:

Open ended investigation

Explanation:

The above is an example of an open ended investigation. In understanding what an open ended investigation is, we first of all need to understand what open endedness means. Open endedness means whether one solution or answer is possible. In other words it means that there may be various ways and alternatives to solve or answer a question or bring solution to an investigation.

From the definition, we can deduce that an open ended investigation is a practical investigation that requires students to utilize procedural and substantive skills in arriving at conclusion through evidence gathered from open ended research or experiment(as in not close ended, not limited to ready made options, freedom to explore all possibilities). This is seen in the example question where students are asked to explore the different examples of physical controls and displays and also discuss their observations. Here students are not required to produce a predefined answer but are free to proffer their own solutions

Answer:

I've written in python

Explanation:

age = int(input("Enter the person's age: ")

def fat_burning_heart_rate(x):

rate =( 70/100 * 220 ) - age

print(fat_burning_heart_rate(age))