What is database design?

Answer:

Harold Washington College. 21.1

Answer: Yes, technology projects should be strategized by the manager of technology.

Explanation: It is correct for technology manager to crate technology projects because the manager would be persisting the knowledge about the technology.Without the correct strategy, which is required to accomplish the goal, the technical project cannot be achieved.

The manager can carry out the work with the help of the critical thinking  and the knowledge about the technologies that should be used.By analyzing the need of the project ,he/she can plan the right steps of strategy.

Answer:

 The wire-shark is the free and open source software tool that is basically used as packet analyzer for software analyzer and network troubleshooting.

The basic ability of the wire-shark it is used in the protocol development and capture the traffic in various form of the network such as wired and wireless.

It is the type of software that help in the security domain as it basically provide the software tool t filter all the traffic and problem in the software which increased the security of the system and provide high efficiency.

Answer:a) Key performance indicators (KPIs)

Explanation: Key performance indicators are the measurement key for evaluation of the  performance of the organization on the basis of long time period. They help in providing the knowledge about the business's financial achievement , organizational plan, and other factors.

It is creates the factor/goal that should be focused more for improvement of the business.It creates the critical key so that the progress in the achieving the goal evaluated can be done.

Other options are incorrect because critical success factor(CSF) is the factor for achieving successful and positive outcome in business  ,scorecard are for the noting the score of positive and negative factors and financial is the term for the finance and money in the business.Thus the correct option is option (a).

Answer:

Assumes indentation has a logical purpose

Explanation:

No period

Answer:

Hi!

The answer to:

a. 6 bits.

b. 9 bits.

c. 26 bits.

Explanation:

a. For the states of the U.S.A, you need 50 or more combinations to represents each element.

If you use 6 bits, the possible combinations are 2⁶ = 64.  

b. For days in a year, you need 365 or more combinations to represents each element.

If you use 9 bits, the possible combinations are 2⁹ = 512.

c. For inhabitants of California, you need 36,457,549 or more combinations to represents each element.

If you use 26 bits, the possible combinations are 2²⁶ = 67,108,864. If you use 25 bits instead of 26, then you have 2²⁵ = 33,554,432 combinations. These possible combinations are not enough to represent each inhabitant.

Answer:

// here is code in java.

import java.util.*;

// class definition

public class Main

{

public static void main(String[] args) {

    // scanner object to read input from user

    Scanner s=new Scanner(System.in);

    // array of months

  String mon[] ={

       null , "January" , "February" , "March" , "April", "May",

       "June", "July", "August", "September", "October",

       "November", "December"};

       // array which store number of days corresponding to months

       int days[]={0,31,28,31,30,31,30,31,31,30,31,30,31};

       // ask user to enter month

       System.out.print("enter the month:");

       // read month

      int m=s.nextInt();

      // ask user to enter year

       System.out.print("enter the year:");

       // read year

      int year=s.nextInt();

      // check the leap year

      if(m==2 &&(((year % 4 == 0) && (year % 100!= 0)) || (year%400 == 0)))

      {

          System.out.println(mon[m]+" "+year+" has 29 days.");

      }

      else

      System.out.println(mon[m]+" "+year+" has "+days[m]+" days");    

}

}

Explanation:

Declare and initial month array and days array.Then read the month and year From user with the scanner object.Check if entered year is a leap year or not.Then based on the year and month print the number of days .

Output:

enter the month:2                                                                                                                                            

enter the year:2000                                                                                                                                          

February 2000 has 29 days.

enter the month:3                                                                                                                                            

enter the year:2005                                                                                                                                          

March 2005 has 31 days.

Final answer:

To determine the number of days in a month, one must consider the regular pattern where most months have 30 or 31 days and February has 28 or 29 days depending on whether it is a leap year. A program can be written to take a user's input for month and year and then calculate and display the correct number of days using validation for leap years and the known month lengths.

Explanation:

To create a program that displays the number of days in a month based on user input of the month and year, one must consider the irregularities of the Gregorian calendar. The program should take into account that most months have at least 30 days, except February, which has 28 days in a common year and 29 days in a leap year. A leap year occurs every four years, except in cases where the year is divisible by 100 but not by 400. Thus, years like 2000 and 2400 are leap years, but 1900 and 2100 are not.

A mnemonic that can help remember the number of days in each month is: 'Thirty days hath September, April, June, and November. All the rest have thirty-one, save the second one alone, which has four and twenty-four, till leap year gives it one day more.' Additionally, the 'knuckle mnemonic' can be used, where protruding knuckles represent months with 31 days and the spaces in between represent shorter months.

Example Program in Python:

month = int(input('Enter month (1-12): '))
year = int(input('Enter year: '))
if month in (4, 6, 9, 11):
   days = 30
elif month == 2:
   if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
       days = 29
   else:
       days = 28
else:
   days = 31
print('Number of days: ', days)

This basic Python program prompts the user for the month and year and then prints out the correct number of days in that month, considering whether it is a leap year for February.

Answer: Naming the function

Explanation:

 The first item for defining the function is the naming of the function. In the function, the first line is known as header and rest of the function is known as body of the function.

The function name is the first step while defining the proper function as we can define the actual function name on which the program are rest based.

We can define a function from which the each value from the set of the components are basically associated with the second component in that particular function.

Answer:

myString=myString.toUpperCase();

Explanation:

In java to change all characters of a string to upper case we use .toUpperCase() method.It will convert string to upper case.

Implementation in java.

import java.util.*;

class Solution

{

public static void main (String[] args) throws java.lang.Exception

{

   try{

Scanner scr=new Scanner(System.in);

System.out.print("Enter a string:");

String myString=scr.nextLine();

myString=myString.toUpperCase();

System.out.println("string in upper case : "+myString);

         }catch(Exception ex){

       return;}

}

}

Output:

Enter a string:hello

string in upper case : HELLO

Final answer:

To output myString in uppercase, use the code: System.out.println(myString.toUpperCase()); which utilizes Java's .toUpperCase() method.

Explanation:

To convert a String object called myString to uppercase using Java, you would use the .toUpperCase() method. The following line of code will accomplish that and output the uppercase version of myString:

System.out.println(myString.toUpperCase());

This line will print the contents of myString to the console, with all characters in uppercase, fulfilling the task requirements.

The `toUpperCase()` method in Java converts all characters in a string to uppercase. By calling this method on `myString` and then printing the result, the program outputs the uppercase version of `myString`.

Answer:

bool isdivisor(int x) // function definition

{

 if(x%5==0) // check Integer is divisible by 5

 {

   return true;

 }

 else

 {

   return false;

 }

}

Explanation:

#include <iostream>// header file

using namespace std; // using namespace std;

bool isdivisor(int num); // prototype

int main() // main function

{

   bool t; // bool variable

   int num; // variable declarartion

   cout<<" enter the num:";

   cin>>num; // input number

  t=isdivisor(num); // calling

  if(t)

     cout<<" number is divisible by 5 ";

     else

     cout<<" number is not divisible by 5";

     return 0;

}

   bool isdivisor(int x) // function definition

{

 if(x%5==0)

 {

   return true;

 }

 else

 {

   return false;

 }

}

Output:

enter the num:50

number is divisible by 5

Explanation:

In this program we have a declared a Boolean function i.e isdivisor that accept one argument of type int.

check if(x%5==0) it return true otherwise false .

Answer: 32 bit number

Explanation:

 The IP address basically contain 32 bit number as due to the growth of the various internet application and depletion of the IPV4 address. The IP address basically provide two main function is that:

The IP address are basically available in the human readable format. The IPV6 is the new version of the IP address and its uses 128 bits.  

Answer:

// here is pseudo-code and implementation in java.

import java.util.*;

// class definition

class Solution

{

// main method of the class

public static void main (String[] args) throws java.lang.Exception

{

   try{

    // scanner object to read innput

       Scanner s=new Scanner(System.in);

        // variables

      double item_cost;

      System.out.print("Please enter cost of item:");

   //read the cost of item

      item_cost=s.nextDouble();

   // calculate 10% tax on the item

      double tax=item_cost*0.1;

   // print original cost

      System.out.println("original cost of item is: "+item_cost);

   // print tax on the item

      System.out.println("tax on the item is: "+tax);

   // print total cost of item

      System.out.println("total cost of item is:"+(item_cost+tax));

   }catch(Exception ex){

       return;}

}

}

Explanation:

Read the original cost of item from user and assign it to variable "item_cost". Calculate 10% tax on the cost of item and assign it to variable "tax".Print the  original cost and tax on item.Then add the cost and tax, this will be the total  cost of item and print it.

Output:

Please enter cost of item:125

original cost of item is: 125.0

tax on the item is: 12.5

total cost of item is:137.5

Answer:

#Python

class PriceTax:

   def __init__(self): #Main method

       self.itemPrice = int(input("Price of your item: "))

       self.tax = 0.1

       self.total = round(self.tax*self.itemPrice,2)

       print("\nOriginal price: ", self.itemPrice)

       print("Tax: %d%%" % (self.tax*100))

       print("Total: ", self.total)

price = PriceTax()

Explanation:

We define a class called PriceTax with a main method __init__, we asked for the user input and store the int value in an attribute called itemPrice, we define the tax attribute and we calculate the total by multiplying the predefined tax and the item price entered by the user. Finally, we print the original price, the tax, and the total. Note that for this to work we instantiate the class 'PriceTax' first under the variable price.

Answer:

 Percent encoding is the mechanism for encoding the information in the URI  (Uniform resource identifier) that basically transmitted the special variable or characters in the URI to the cloud platform.

It is also used in various application for transferring the data by using the HTTP requests.

Percent encoding is also known as uniform resource locator (URL) encoding. The percent encoding basically used to convert the non ASCII characters into URL format which is basically understandable to the all the web server and browsers. In percent encoding the percent sign is known as escape character.

Answer:True

Explanation: Load-store architecture is the architecture in the computer system field that  contains the instruction collection.These sets of the instructions are dived in the two parts named as the ALU(arithmetic and logical) operation section and memory access section.

The ALU operation part handles the arithmetic calculation and evaluation between the registers whereas the memory access part handles the load and store actions only between the register and memory.Thus , the given statement is true.

Answer: Worm

Explanation: Worm is the malicious software program which acts as the infection in the computer system. It has the ability to replicate itself and spread in the other systems .It is found in those parts that have automatic operation and non-noticeable.

The effect of the worm is slowing down the operations ,disturb the network etc.Other options are incorrect because virus is the malicious program that infects the host, key-loggers are used for monitoring of system and  time bomb is the program for releasing the virus in computer network. Thus, the correct option is worm.

Answer:

The role of test oracle is to determine if a test has passed or failed. Oracle compares the outputs of the system under a  test, for a given test-case input, and the output(s) that should have. A test oracle works on specifying constraints on the output(s) for a set of inputs. An oracle could be:

Answer: Software quality assurance is considered as the means under which one monitors the software processes and techniques used in order to ensure quality. The techniques using which this is attained are varied, and thus may also include ensuring accordance to more than one standards. It is referred to as a set of techniques that ensures the quality of projects in software process. These mostly include standards that administrators use in order to review and also audit software activities, i,e, these software meet standards.

Answer:

Internet of thing is a generic term given to all the devices that are interconnected via internet. The things are all the devices that we use in out daily lives such as refrigerators, cars, homes ,e.t.c The interconnections of all the things allows better operation and high ease of daily life as the devices are calibrated to our needs hence automatically turn off if we don't use them. As an example the interconnected electric lights in smart homes know weather we are present in home or not and automatically turn off and on depending on our presence.

As an example of Internet of things device consider Smart Homes that use automation to regulate various operations such as lighting, air conditioning and other operations. If an rouge entity gets access to the system and is able to disrupt the operation's we can easily identify the consequences such as no light , no air conditioning among others. Even our access to our own house can be blocked thus making our life miserable.

Answer

responsible I think I wouldn't know

Explanation:

Answer:

 Data hierarchy is basically define to the data which is organized in the systematic manner. The main concept of the data hierarchy is to check the basic structure of the data. It basically involve the fields records and files for the data organization.

The following is the list of the computer data hierarchy from nit to address are:

1) Bit: It is the smallest unit of the data.

2) Field: The collection of all the characters in the data is known as field.

3) Record: The collection of the different fields is known as records.

4) File: The collection of various types of records in the database is known as file.

Answer:

Final variable x is not initialized.

Explanation:

In this JAVA code we have a final variable named x.The thing with final variable is that they act like constants in C++.Once initialized cannot be changed after that and we have to initialize them at the time of declaration.

In JAVA if we do not initialize the final variable the compiler will throw compile time error.Final variables are only initialized once.

Answer:

Nominal data is the used as the scale for providing a label or topic to the variable and not providing any quantity for the measurement. It provides the data in form of symbols,character,letter etc. which is known as the qualitative measure.

They are usually collected and clustered to make the measurement according to the categories. Nominal data is known as the nominal scale.It does not act as the normal data.

Answer: HUB

Explanation:

A Hub is a network device, that acts only in layer 1 (Physical layer) forwarding all traffic that reaches to the input port, to all output ports at once, without processing the received data in any way that could modify them.

It behaves like it were a multiport repeater (which has only one output port).

Answer:

// code in C++.

#include <bits/stdc++.h>

using namespace std;

// main function

int main()

{

   // variables

   int n;

   cout<<"Enter a positive number:";

   // read number

   cin>>n;

   // check number is positive or not

   while(n<0)

   {

   // if number is negative

       cout<<"Wrong input!!"<<endl;

       // ask again to enter again

       cout<<"Enter again:";

       // read number again

       cin>>n;

   }

   // generate random number between 1 to n

   int ran=rand()%n +1;

   // print random number

   cout<<"Random number between 1 to "<<n<<" is: "<<ran<<endl;

return 0;

}

Explanation:

Read a number from user.Then if input number is negative then ask user to enter a positive number again.After this generate a random number between 1 to n.Print that random number.

Output:

Enter a positive number:-12

Wrong input!!

Enter again:9

Random number between 1 to 9 is: 2

Answer:

 In the database, the documenter is basically used to display the properties of the selected object and use the microsoft access to display the particular object.

The database documenter basically created a particular document and report which basically contain proper detailed information and data for the every selected object.

Then, after creating the report we can easily open in the print for previewing the report in the microsoft access.     

Answer:

The relation is the Voltage levels.

Explanation:

Basically the relation is related with voltages levels, that is, the computer has the main component called mother-board this component is the "brain" of the computing systems made of something called microprocessors, intel has core i7,i9 dual core, etc. The mother-board manage the information and save information in the memories, usually Random Access Memory (RAM) and hard disk, this information is understood by the computer as ones (1) and zeros(0), that means, that the computer process logic levels or binary numbers.

Since the beginning of computer developments was in this way because facilitates the process of computing,  and the transistor was an excellent candidate for doing this because the device is scalable, and consumed less power than vacuum tubes that was used in 70's, more or less. There are configurations of transistor that allow use a binary numeric system, such as NOT,OR and AND gates, these are the base of all computers, the computers are made of millions of this gates made with transistors, for example, the attached picture has a NOT gate, suppose that is wired to VDD volts and is refereed to ground GND or zero ( 0 )volts, if a voltage level close to GND is aplied in the input the output is VDD, and if a voltage close to VDD is applied to the input the output will be GND.

In other words the logic levels are read by the computer as ones and zeros but these are voltage levels that could be measured with voltmeters or specialized equipment and are produced by transistors configurations as presented in this answer.

LOGIC LEVELS WHERE THE VOLTAGE VDD IS 1 AND GND IS 0

INPUT:

             1   ______                         1      ______

        0___|             |_________0____|             |_____

OUTPUT

       1  ___              _______________              _____

       0        |______|                               |______|

Answer:

class Automobile {

virtual void drive ()=0;

}

Explanation:

In C++, an abstract class is one which cannot be instantiated. However it can be subclassed. A  class containing a pure virtual function is considered an abstract class. A virtual function is preceded by the virtual keyword. For example:

virtual void drive();

In addition , if a virtual function is pure, it is indicated using ' = 0 ;' syntax.

For example:

virtual void drive() = 0;

Of the given options:

class Automobile {

virtual void drive ()=0;

}

represents an abstract class.

The abstract class in the given options is the one with a pure virtual function, which is 'class Automobile { virtual void drive ()=0; }'.

An abstract class is a class that cannot be instantiated on its own and is typically used as a base class for other classes. In C++ programming language, an abstract class is defined by having at least one pure virtual function. Looking at the given options, the class that represents an abstract class is the one that declares a pure virtual function with the syntax '=0' after the function declaration.

Therefore, the correct option is:

The presence of the keyword virtual followed by '=0' in the function declaration indicates that the drive function is a pure virtual function, making the Automobile class abstract.

Answer: Key-logger

Explanation: Key-logger is the device that is used in the capturing the keystrokes of the user and then recording it .They can be in the form of software or hardware.The recording made by key logger consist the data typed through the keyboard like email, messages, passwords .

Other options are incorrect because keyboard is the hardware device used for inputting data in the system, key-scanner is the input reading device in the form of library and rootkit is malicious collection of software to disturb the function of the computer system.Thus the correct option is key-logger.

A keylogger, which can be software or hardware, records keystrokes on a computer to capture sensitive information like passwords. Rootkits, in contrast, provide backdoor access to systems.

The correct answer to the question is Keylogger. A keylogger is a tool that can be either hardware or software, designed for the purpose of capturing keystrokes on a computer system. Once activated, it records every key pressed and sends this information to an attacker or stores it for retrieval. In contrast, a rootkit is a type of malware that provides unauthorized users with administrative access to a computer system, often without being detected.

Keyloggers are considered a form of spyware because they covertly monitor and record users' keystrokes, which can include sensitive information like passwords and personal data. The information captured by keyloggers can be used for malicious purposes, such as identity theft or unauthorized access to secured systems.

Answer:

Explanation:

Final answer:

Networks are categorized into WAN, LAN, MAN, and PAN based on their geographical coverage and usage, ranging from expansive (like the internet) for WAN, to personal space for PAN. Wi-Fi is a common technology used for creating LANs that allow devices to connect wirelessly within a certain area.

Explanation:

Networks come in various sizes and are categorized based on their geographical span and usage. Here we explore four kinds: Wide Area Network (WAN), Local Area Network (LAN), Metropolitan Area Network (MAN), and Personal Area Network (PAN).

WAN is a network that covers a broad area, potentially spanning countries or continents. It can be made up of multiple LANs and connects devices across long distances, such as the internet. LAN, on the other hand, is restricted to a small geographical area, typically a single building or campus, and offers high data transfer rates. It is commonly used in homes, schools, and offices.

MAN encompasses a larger area than LAN but smaller than WAN, often spreading across a city or metropolitan area. It is useful for connecting several LANs within that city to allow networks to communicate with each other. Lastly, PAN is the smallest network, intended for personal use within a range of a few meters. It typically involves devices like smartphones, tablets, and wearables interacting with each other.

Wi-Fi is a widely adopted technology enabling wireless LANs, described by the IEEE 802.11 series of standards. It's a key part of many networks, providing connectivity in homes, offices, and public hotspots. People might pay a monthly fee or get access for free, depending on the business model of the ISP or facility providing the Wi-Fi service.

Answer: True

Explanation: Break statements are the statements is for the termination of the loop .It is considered as the statements that control the loop. For the default case ,default method is used in the switch selection statements.

The Switch selection statement,due to the working of the break statement will exit or terminate. Thus, the statement given in the question is correct.

Answer:

console.log(Animal);

Explanation:

The statement written above prints the array Animal which contains objects.There are two to three ways to print the array Animal in javascript. One of the method is written in the answer it prints the arrays in the console of the browser.

You can go to the console by pressing F12 and then clicking on the console.

Other methods to print are