Answer: Spear phishing; Pharming
Explanation:
Based on the information given in the question, the security concerns that need to be identified and mitigated are spear phishing and pharming.
Spear phishing is the fraudulent practice whereby emails are sent from a trusted sender in which people are targeted to give out some confidential information.
Pharming is a cyberattack whereby the traffic of a website is redirected to another fake site. This is typically done when the host file on the computer of the victim has been changed.
All of the following are examples of being computer literate, EXCEPT ________. knowing how to use the web efficiently knowing how to build and program computers knowing how to avoid hackers and viruses knowing how to maintain and troubleshoot your computer
Answer:knowing how to build and program computers.
Explanation:
Modify the DemoSalesperson application so each Salesperson has a successive ID number from 111 through 120 and a sales value that ranges from $25,000 to $70,000, increasing by $5,000 for each successive Salesperson. Save the file as DemoSalesperson2.java.
Answer:
Here is the modified DemoSalesperson2
public class DemoSalesperson2{ // class DemoSalesperson2
public static void main(String[] args) { //start of main() function body
SalesPerson[] sp = new SalesPerson[10]; // creates an array of SalesPerson object named sp
int start_id =111; // assign 111 to starting id number
double start_sal=25000; //assign 25000 to starting salary means salary will start from amount 25000
for (int i =0; i<sp.length; i++) { //loop iterates until the value of loop variable i remains less then length of the array object sp
sp[i] =new SalesPerson(start_id+i,start_sal+5000*(i)); /*at each iteration ID number from 111 through 120 and a sales value that ranges from $25,000 to $70,000, increasing by $5,000 for each successive is displayed using object array sp[] which calls the SalesPerson constructor to access id and sales */
System.out.println(sp[i].getId()+" "+sp[i].getAnnualSales() ); } } } /*uses object sp of class SalesPerson to access the methods getId which returns the id and getAnnualSales method which returns the annual sales, to display id and annual sales */
Explanation:
The question first requires a SalesPerson class with these requisites:
Class name: Salesperson.
Data fields for Salesperson: int ID number , double annual sales amount.
Methods: constructor SalesPerson() that requires values for both data fields, as well as get and set methods for each of the data fields.
So according to the complete question's requirement, I have implemented SalesPerson class:
public class SalesPerson { // class name
//data members: integer type id variable and double type sales variable
private int id;
private double sales;
public SalesPerson(int id_no, double annual_sales) { //constructor that requires values for id and sales
id = id_no;
sales = annual_sales; }
public int getId() { //accessor getId() method to get or access the value of id data field
return id; }
public void setId(int id_no) { //mutator setId to set the value of id data field
id = id_no; }
public double getAnnualSales() { //accessor getAnnualSales() method to get or access the value of sales data field
return sales; }
public void setAnnualSales(double annual_sales) { //mutator setAnnualSales to set the value of sales data field
sales = annual_sales; } }
However you can use my DemoSalesperson2 application for your own SalesPerson class.
Now I will explain the working of for loop used in DemoSalesperson2
Iteration 1:
i=0
i<sp.length is true because length of sp[] is 10 so i<10
This means the body of for loop will execute.
The statement inside the body of for loop is :
sp[i] =new SalesPerson(start_id+i,start_sal+5000*(i));
class SalesPerson constructor is used to access the data members of SalesPerson class
start_id = 111
start_sal=25000
start_id+i = 111 + 0 = 111
start_sal+5000*(i) = 25000 + 5000 (0) = 25000
The values 111 and 25000 are stored to sp[0] means at the first index of the sp array.
System.out.println(sp[i].getId()+" "+sp[i].getAnnualSales() );
This statement uses sp object to get access to the getId and getAnnualSales methods to print the id number and sales amount.
So the output at 1st iteration is:
111 25000.0
Iteration 1:
The value of i is incremented to 1 so now i = 1
i<sp.length is true because length of sp[] is 10 so i<10
This means the body of for loop will execute.
The statement inside the body of for loop is :
sp[i] =new SalesPerson(start_id+i,start_sal+5000*(i));
class SalesPerson constructor is used to access the data members of SalesPerson class
start_id = 111
start_sal=25000
start_id+i = 111 + 1 = 112
start_sal+5000*(i) = 25000 + 5000 (1) = 25000 + 5000 = 30000
The values 111 and 25000 are stored to sp[1] means at the first index of the sp array.
System.out.println(sp[i].getId()+" "+sp[i].getAnnualSales() );
This statement uses sp object to get access to the getId and getAnnualSales methods to print the id number and sales amount.
So the output at 1st iteration is:
112 30000.0
The loop keeps iterating and the value of id is incremented by 1 and value of sales is increased by 5000 at every iteration.
This loop continues to execute until the value of i exceeds the length of sp array i.e. 10.
The values from iteration 1 to 8 following the above explanation are:
Iteration 1:
111 25000.0
Iteration 2:
112 30000.0
Iteration 3:
113 35000.0
Iteration 4:
114 40000.0
Iteration 5:
115 45000.0
Iteration 6:
116 50000.0
Iteration 7:
117 55000.0
Iteration 8:
118 60000.0
Iteration 9:
119 65000.0
Iteration 10:
120 70000.0
At iteration 11 the for loop body will not execute as value of i at 11th iteration is i = 10 and i<sp.length evaluates to false as i = sp.length because length of sp array is 10 and now the value of i is also 10. So the loop ends. Screenshot of the program and its output is attached.
When discussing the behavior of vulnerability assessments which choice will exploit a weakness?
a) Penetration test
b) Vulnerability scan
c) Intrusive
d) Gray box
e) Credentialed vulnerability scan
f) Non-credentialed vulnerability scan
Answer:
a) Penetration test
Explanation:
A penetration test, often referred to as a pen test, is part of important process in the development of internet facing service. It is a process of determining if vulnerabilities are actually exploitable in a particular environment.
In other words, it is a process that involves a simulated cyber attack against computer system to check for exploitable vulnerabilities or attempts to actively exploit weaknesses in an environment.
Hence, when discussing the behavior of vulnerability assessments the choice that will exploit a weakness is PENETRATION TEST.
When discussing the behavior of vulnerability assessments, the choice which will exploit a weakness is: A) Penetration test.
Cyber security can be defined as a preventive practice to systematically protect computers, software applications (programs), networks, electronic devices, servers and user data from potential attack, damage, theft or an unauthorized access, especially through the use of technologies, frameworks, integrity principles, processes, penetration test and network engineers.
A vulnerability can be defined as a weakness in an automated internal control system and security procedures, which may be exploited by an attacker (hacker) to gain unauthorized access to the data stored on a computer system or disrupt the information system.
Basically, vulnerability assessments can be used in the following ways:
Identify loopholes, risks and security threats. Prioritize and enhance an information system.Mitigate potential security threats.A penetration test is also referred to as pen test or ethical hacking and it can be defined as a cybersecurity technique that simulates a cyber attack against a user's computer system, so as to identify, test an check for exploitable vulnerabilities in a web software, network, etc.
This ultimately implies that, a penetration test avails an end user the ability to exploit a weakness and potential security threats during vulnerability assessments.
24. Which of the following statements about Emergency Support Functions (ESFs) is correct?
O A. ESFs are not exclusively federal coordinating mechanism
O B. ESFs are only a state or local coordinating mechanism
O C. ESFs are exclusively a federal coordinating mechanism
O D. ESFs are exclusively a state coordinating mechanism
(ESFs) is correct: ESFs are not exclusively federal coordinating mechanism.
If the object instance is created in a user program, then the object instance can access both the public and private members of the class using DOT notation (such as Rectangle r; r.area=10). True or False
Answer:
False
Explanation:
The private member of a class is not accessible by using the Dot notation ,however the private member are those which are not accessible inside the class they are accessible outside the class .The public member are accessible inside the class so they are accessible by using the dot operator .
Following are the example is given below in C++ Language
#include<iostream> // header file
using namespace std;
class Rectangle
{
private:
double r; // private member
public:
double area()
{ return 3.14*r*r;
}
};
int main()
{
Rectangle r1;// creating the object
r1.r = 3.5;
double t= r1.area(); // calling
cout<<" Area is:"<<t;
return 0;
}
Output:
compile time error is generated
The correct program to access the private member of class is given below
#include<iostream> // header file
using namespace std;
class Rectangle
{
private:
double r; // private member
public:
double area()
{
r1=r;
double t2=3.14*r2*r2;
return(t2); // return the value
}
};
int main()
{
Rectangle r1;// creating the object
r1.r = 1.5;
double t= r1.area(); // calling
cout<<" Area is:"<<t;
return 0;
}
Therefore the given statement is False
How many times will the while loop that follows be executed? var months = 5; var i = 1; while (i < months) { futureValue = futureValue * (1 + monthlyInterestRate); i = i+1; }
a. 5
b. 4
c. 6
d. 0
Answer:
I believe it is A
Explanation:
12. Kelly would like to know the average bonus multiplier for the employees. In cell C11, create a formula using the AVERAGE function to find the average bonus multiplier (C7:C10).
Answer:
1. Divide each bonus by regular bonus apply this to all the data
2. In cell C11 write, "Average" press tab key on the keyboard and then select the range of the cells either by typing "C7:C10" or by selecting it through the mouse.
Explanation:
The average bonus multiplier can be found by dividing each bonus with the regular bonus applying this to all the data and then putting the average formula and applying it to the cells C7:C10.
After dividing the bonus with regular bonus, in cell C11 write, "Average" press tab key on the keyboard and then select the range of the cells either by typing "C7:C10" or by selecting it through the mouse.
k- Add the code to define a variable of type 'double', with the name 'cuboidVolume'. Calculate the volume of the cuboid and set this variable value.
Answer:
Here is the JAVA program to calculate volume of cuboid:
import java.util.Scanner; // Scanner class is used to take input from user
public class CuboidVol { // class to calculate volume of cuboid
public static void main(String[] args) { // start of main() function body
Scanner input= new Scanner(System.in); //create Scanner class object
// prompts user to enter length of cuboid
System.out.println("Enter the cuboid length:");
double length=input.nextDouble(); //reads the input length value from user
// prompts user to enter width of cuboid
System.out.println("Enter the cuboid width:");
double width=input.nextDouble(); //reads the input width from user
// prompts user to enter height of cuboid
System.out.println("Enter the cuboid height:");
double height=input.nextDouble(); //reads the input height from user
/* the following formula is to calculate volume of a cuboid by multiplying its length width and height and a double type variable cuboidVolume is defined to store the value of the resultant volume to it */
double cuboidVolume= length*width*height; //calculates cuboid volume
//displays volume of cuboid and result is displayed up to 2 decimal places
System.out.printf("Volume of the cuboid (length " + length + "/ height " + height + "/ width" +width +" is: " + "%.2f",cuboidVolume); } }
Explanation:
The formula for the volume of a cuboid is as following:
Volume = Length × Width × Height
So in order to calculate the volume of cuboid three variable are required for length, width and height and one more variable cuboidVolume to hold the resultant volume of the cuboid.
The program is well explained in the comments added to each statement of the program. The program prompts the user to enter the value of height width and length of cuboid and the nextDouble() method is used to take the double type input values of height length and width. Then the program declares a double type variable cuboidVolume to hold the result of the volume of cuboid. Then the last printf statement is used to display the volume of cuboid in the format format "Volume of the cuboid (length / height / width ) is" and the result is displayed up to 2 decimal places.
The screenshot of the program along with its output is attached.
differentiate between web site and web application?
Explanation:
A website is a group of globally accessible into linked pages which have a single domain name. A web application is a software or program is is accessible using any web browser.
Answer:
Explanation:
A website shows static or dynamic data that is predominantly sent from the server to the user only, whereas a web application serves dynamic data with full two way interaction.
Write a sentinel-controlled while loop that accumulates a set of integer test scores input by the user until negative 99 is entered.
Answer:
Here is the sentinel-controlled while loop:
#include <iostream> //to use input output functions
using namespace std; // to identify objects like cin cout
int main(){ // start of main() function body
int test_score; // declare an integer variable for test scores
//prompts user to enter test scores and type-99 to stop entering scores
cout << "Enter the test scores (enter -99 to stop): ";
cin >> test_score; // reads test scores from user
while (test_score != -99){ // while loop keeps executing until user enters -99
cin >> test_score; } } // keeps taking and reading test scores from user
Explanation:
while loop in the above chunk of code keeps taking input scores from user until -99 is entered. Sentinel-controlled loops keep repeating until a sentinel value is entered. This sentinel value indicates the end of the data entry such as here the sentinel value is -99 which stops the while loop from iterating and taking the test score input from user.
The complete question is that the code should then report how many scores were entered and the average of these scores. Do not count the end sentinel -99 as a score.
So the program that takes input scores and computes the number of scores entered and average of these scores is given below.
#include <iostream> // to use input output functions
using namespace std; // to identify objects like cin cout
int main(){ //start of main function body
double sum = 0.0; // declares sum variable to hold the sum of test scores
int test_score,count =0;
/* declares test_scores variable to hold the test scores entered by user and count variable to count how many test scores input by user */
cout << "Enter the test scores (or -99 to stop: ";
//prompts user to enter test scores and type-99 to stop entering scores
cin >> test_score; // reads test scores from user
while (test_score != -99){ // while loop keeps executing until user enters -99
count++; /* increments count variable each time a test cores is input by user to count the number of times user entered test scores */
sum = sum + test_score; // adds the test scores
cin >> test_score;} // reads test scores from user
if (count == 0) // if user enters no test score displays the following message
cout << "No score entered by the user" << endl;
else //if user enters test scores
//displays the numbers of times test scores are entered by user
cout<<"The number of test scores entered: "<<count;
/* displays average of test scores by dividing the sum of input test scores with the total number of input test scores */
cout << "\n The average of " << count << " test scores: " <<sum / count << endl;}
The program along with its output is attached.
4. Discuss the advantages and disadvantages of using the same system call interface for both files and devices. Why do you think operating system designers would use the same interface for both
Answer:
According to the principles of design, Repetition refers to the recurrence of elements of the design
One of the advantages of this is that it affords uniformity. Another is that it keeps the user of such a system familiar or with the interface of the operating system.
One major drawback of this principle especially as used in the question is that it creates a familiar route for hackers.
Another drawback is that creates what is called "repetition blindness". This normally occurs with perceptual identification tasks.
The phenomenon may be due to a failure in sensory analysis to process the same shape, figures or objects.
Cheers!
Distinguish among packet filtering firewalls, stateful inspection firewalls, and proxy firewalls. A thorough answer will require at least a paragraph for each type of firewall.
Acme Corporation wants to be sure employees surfing the web aren't victimized through drive-by downloads. Which type of firewall should Acme use? Explain why your answer is correct.
Answer:
packet filtering
Explanation:
We can use a packet filtering firewall, for something like this, reasons because when visiting a site these types of firewalls should block all incoming traffic and analyze each packet, before sending it to the user. So if the packet is coming from a malicious origin, we can then drop that packet and be on our day ;D
ICMP
(a) is required to solve the NAT traversal problem
(b) is used in Traceroute
(c) has a new version for IPv6
(d) is used by Ping
Answer:
(b) is used in Traceroute
(d) is used by Ping
Explanation:
ICMP is the short form of Internet Control Message Protocol. It is a protocol used by networking devices such as routers to perform network diagnostics and management. Since it is a messaging protocol, it is used for sending network error messages and operations information. A typical message could be;
i. Requested service is not available
ii. Host could not be reached
ICMP does not use ports. Rather it uses types and codes. Some of the most common types are echo request and echo reply.
Traceroute - which is a diagnostic tool - uses some messages available in ICMP (such as Time Exceeded) to trace a network route.
Ping - which is an administrative tool for identifying whether a host is reachable or not - also uses ICMP. The ping sends ICMP echo request packets to the host and then waits for an ICMP echo reply from the host.
ICMP is not required to solve NAT traversal problem neither does it have a new version in IPV6.
In e-mail, SSL/TLS provides ________. link encryption end-to-end encryption both link encryption and end-to-end encryption neither link encryption nor end-to-end encryption
Answer:
link encryption
Explanation:
In e-mail, SSL/TLS provides link encryption.
The SSL is an acronym for Secured Socket Layer and it is one of the secured way of authenticating and encrypting data between a computer and the mail server.
In the case of a TLS, it is an acronym for Transport Layer Security and it basically is used for providing authentication and encryption of data between two communicating systems on a network.
This ultimately implies that, SSL/TLS are standard network protocols that provides data integrity and privacy to users when communicating over the internet or networking devices as they're made to encrypt user credentials and data from unauthorized access. The SSL/TLS are an application layer protocol used for the encryption of mails sent over the internet, in order to protect user information such as username and password.
Define a function ComputeGasVolume that returns the volume of a gas given parameters pressure, temperature, and moles. Use the gas equation PV = nRT, where P is pressure in Pascals, V is volume in cubic meters, n is number of moles, R is the gas constant 8.3144621 ( J / (mol*K)), and T is temperature in Kelvin.Sample program:#include const double GAS_CONST = 8.3144621;int main(void) { double gasPressure = 0.0; double gasMoles = 0.0; double gasTemperature = 0.0; double gasVolume = 0.0; gasPressure = 100; gasMoles = 1 ; gasTemperature = 273; gasVolume = ComputeGasVolume(gasPressure, gasTemperature, gasMoles); printf("Gas volume: %lf m^3\n", gasVolume); return 0;}
Answer:
double ComputeGasVolume(double pressure, double temperature, double moles){
double volume = moles*GAS_CONST*temperature/pressure;
return volume;
}
Explanation:
You may insert this function just before your main function.
Create a function called ComputeGasVolume that takes three parameters, pressure, temperature, and moles
Using the given formula, PV = nRT, calculate the volume (V = nRT/P), and return it.