Describe the differences in meaning between the terms relation and relation schema.

Answer:

- Different route paths, due to dynamic routing in WAN.

- Local area networks have one or very few paths to destination and does not require dynamic routing.

Explanation:

A wide area network is a network that covers a large geographical area. It goes beyond the private local area network, with more routing paths and network intermediate devices. The router is an essential tool for routing packets between devices. It requires a routing path, learnt statically or dynamically to work.

There are mainly two types of route paths, they are, static routes and dynamic routes.

The dynamic routes are used mainly in WAN. Sometimes, there can be multiple path to a destination, the router determines the best path to send the packets. It sends the sequenced packets through all available path and they arrive at the destination depending on the path used, the packets arrive in an out -of-order fashion in the destination and a rearranged.

Answer:

c. Surveillance-specific design.

Explanation:

Surveillance-specific design is a kind of design done by a data center designer that focuses on all factors that need to be considered before siting a surveillance device.

Answer:

C. . Surveillance-specific design

Explanation:

Designing and managing the operations of an effective surveillance system rely on two key principles:

Clear prioritization: What are the most critical data and analyses needed for the epidemiological zones with the highest epidemic potential? How can financial and technical resources be deployed most efficiently?

Flexibility: Do you have the ability to adjust where and when data are collected and analysed based on new information about the epidemic? Incorporating flexibility into your national surveillance plan design will help the programme be responsive and stay ahead of the epidemic.

Answer:

There are 7 layers in linux.

Explanation:

As networking is difficult and complex.

Imagine if every application had to know how to communicate on every step that would be more than just complex. So, rather than reinvent something which will help it to communicate let’s just make something that will automatically controls the communication and for that protocols came in to live.

As for the linux operating system, it is not exceptional from other operating systems.

There are 7 layers on network protocol stack use to communicate with other network protocol stack.

1. Application layer

2. System call interface

3. Protocol agnostic interface

4. Network protocol

5. Device agnostic interface

6. Device drivers

7. Physical hardware

All the layers vary in their functionality.

One more important thing to remember is that the network protocol stack layers is not one way its 2 way communication. First, when a client request to a network and second, when the request is full filled.

The top most layer is a part of user space, the next five layers comes in the kernel space and the final layer is the physical layer.

Application layer:

When a client or user request to  a network the request initially comes to this layer.

On this layer we use tcp/ip protocol.

System call interface(SCI):

When application layer make a call to the kernel this layer handles that call. And take the request to the next layer.

Protocol agnostic interface:

This layer has two functions “talking” or “listening”. There is a thing called sockets which perform these functions and each socket has an id which is used specifically for an application.

Network protocol:

This layer is used for how the data is sent or received.

Device agnostic interface:

It is used to connect data from/to kernel user space and the network device drivers which allows the data to prepare itself for transmission over the medium from the network device.

Physical hardware :

This layer is responsible for the data packets transmission and received from the network medium being used whether cable or wireless.

Answer:

Program:

#include <stdio.h> // header file

int main() // main function

{

   printf("In C, lowercase letters are significant. main() is where program execution begins. Opening and closing braces enclose program statements in a routine. All program statements must be terminated by a semicolon."); // print statement which print the text which is said by the question to print.

return 0; // return statement

}

Output:

Explanation:

Answer:

The main functionality verified by this test method command is user sharing record.

Explanation:

Generally, every apex code runs in system mode.

Apex is strong object-oriented programming language that allows the developers to execute flow and transaction control.

Using syntax which look like java and acts as databases, Apex allows the developer to add any type of business logics to an event which can include button, clicks records or visual pages.

Apex code can be initiated by web service request.  

The permissions and record sharing of current user are not consider by apex codes.

Now the system method runAs() will allow you to take or write a test method which will basically change the user context to an existing or an new user, so that the record sharing will take place.

runAs() command will not change or anything done with user permissions or permission levels, it will only record sharing of the user.  

When you use runAs() command the original and true context will run after the test method is once completed under the command of runAs().

The runAs() has no concern with the user license.  

If there is no or expired your personal or organization license you can just make a new user with this runAS() command.

In using this command we have to make a private class by the name of this test and then our further code to make a user , afterwards  which we will the true and original code of ours which we want to run.

There are many other uses of runAs() like  

 Mixed DML operations in test by opening the DML operations.

 We can also use it as a version which will take a package as a version argument. This will cause the code a specific version.

runAs(System.Version) is the command used for this.

Explanation:

The "Room to think" defined by the author can mean the proposal that each individual must obtain knowledge on a certain subject through research and self-study, inspiring the reading of the book.

Therefore, it is considered that the space to think is important, as it motivates the individual improvement to obtain more learning and knowledge on a subject, according to their own analyzes and studies.

The author means providing an environment for critical reflection when he says 'Room to think.'

The author, Andy Kirk, in his book Data Visualisation: A Handbook for Data Driven Design refers to 'Room to think' as the allowance of space and time to process information and ideas critically.

This concept means providing an environment where one can reflect deeply on the data, consider different perspectives, and reach meaningful conclusions. According to researchers, allowing time to think is an important part of learning because it enables higher-order thinking skills like critical and analytical reasoning.

This is particularly crucial in our current era of rapid technological change, as noted by Lee (2020), who emphasizes the need for critical thinking.

Answer:

Secure Sockets Layer (SSL)            

Explanation:

Answer:

Today technology is increased much and fast-growing industry. What we purchased or opt, computer architect is outdated within the day

Explanation:

If we purchase any computer and opt for a computer architect. Such as processor or core technology still will be outdated, moreover, nowadays operating system depends on processor speed. If end-user he or her as to keep in mind that hardware investment such a period of 1 year only. Once a one-year end-user has to opt for new technology otherwise exist software and application are outdated.

Answer:

collaboration diagram

Explanation:

Collaboration diagram -

It refers to the diagram , which showcase the link between the unified modeling language with the software object , is referred to as the collaboration diagram.

It is also called the communication diagram .

These diagram are very important for a company as it is the  pictorial representation.

Various software are used to make these diagrams.

Answer:

B.) Deterrent

Explanation:

Final answer:

Backup of server data provides a Corrective control in the case of a system issue, being used to restore systems to their previous state after a problem has occurred.

Explanation:

The type of control that backup of server data provides in case of a system issue is Corrective. This is because backups are used to restore data and systems to their last known good state after an adverse event has occurred, correcting the impact of the event.

Backups do not prevent issues from happening, nor do they deter potential problems; their main purpose is to correct the state of the system after an issue has happened. They also do not typically detect issues, as their role is primarily focused on recovery.

It's important to note that organizations often develop a Corrective and Preventative Action plan to manage potential issues identified through processes like Statistical Process Control discussed in class.

Answer:

The correct answer to the following question will be "KVM".

Explanation:

Therefore, if a customer requests to use a single set of devices (input) to control multiple computers then we must have them as a KVM.

Answer:

Touch screen

Explanation:

A computer system is an electronic device that is meant to give processed output values to input values. The computer components are categorized into three parts, namely input devices, output devices and processing unit.

Input device component of a computer are used to give commands or input data values to the computer. Examples of input devices are keyboards, mouse, joystick, light pen and most recently, touchscreens.

Touch screen are input devices on the screens on computer systems like laptops and smartphones, that uses light sensors to input data when the screen is touched with the finger or a stylus.

This is an example of b2b customer service.

Explanation:

B2b customer service is the customer service which stands for business to business. It refers to the sale that you make to the business instead of an individual consumers.

B2b customer experiences include creating a personalized. omni channel experience and building lasting relationships while providing convenient, digital solutions.

The Python script calculates and displays the total bill for a customer's vehicle rental based on their classification code, rental duration, and odometer readings. The program considers specific pricing rules for each classification.

Here's a Python script that computes and displays the amount charged for a customer's vehicle rental based on the provided information:

python

def calculate_rental_cost(classification, days_rented, start_odometer, end_odometer):

   # Constants for mileage charges

   B_MILEAGE_CHARGE = 0.25

   D_MILEAGE_CHARGE = 0.25

   W_BASE_CHARGE = 350.00

   W_DAILY_CHARGE = 70.00

   # Convert classification code to uppercase

   classification = classification.upper()

   # Calculate base charge

   if classification == 'B':

       base_charge = 40.00 * days_rented

       mileage_charge = B_MILEAGE_CHARGE * (end_odometer - start_odometer)

   elif classification == 'D':

       base_charge = 60.00 * days_rented

       average_miles_per_day = (end_odometer - start_odometer) / days_rented

       mileage_charge = 0.00 if average_miles_per_day <= 100 else D_MILEAGE_CHARGE * (end_odometer - start_odometer - 100 * days_rented)

   elif classification == 'W':

       weeks_rented = days_rented // 7

       days_over_weeks = days_rented % 7

       base_charge = W_BASE_CHARGE * weeks_rented + W_DAILY_CHARGE * days_over_weeks

       mileage_charge = 0.00  # Unlimited miles for weekly rental

   # Calculate total bill

   total_bill = base_charge + mileage_charge

   # Display the total bill with 2 decimal places

   print(f"Total bill for the customer: ${total_bill:.2f}")

# Get input from the user

classification_code = input("Enter customer's classification code (B, D, or W): ")

days_rented = int(input("Enter the number of days the vehicle was rented: "))

start_odometer_reading = int(input("Enter the vehicle's odometer reading at the start: "))

end_odometer_reading = int(input("Enter the vehicle's odometer reading at the end: "))

# Calculate and display the total bill

calculate_rental_cost(classification_code, days_rented, start_odometer_reading, end_odometer_reading)

This script prompts the user for customer information and calculates the total bill based on the specified rules. It then displays the total bill with 2 decimal places.

Answer: - availability

Explanation: disconnecting a cable connection to the company server shuts you out from having access to files contained in that server until reconnection and probably authentication and login.

Answer with Explanation:

Constraints are a very important feature in a relational model. Constraints are useful because they allow a designer to specify the semantics of data in the database. They are the rules that force Database Management Systems (DBMSs) to check that data satisfies the semantics.

Data integrity is the overall completeness, accuracy and consistency of data. This can be indicated by the absence of alteration between two instances or between two updates of a data record, meaning data is intact and unchanged

Referential integrity (RI) is a method for ensuring the “correctness” of data within a Database Management System. It embodies the integrity and usability of a relationship by establishing rules that govern that relationship.

Proper database RI ensures data integrity for both planned application programs and for queries in ad hoc SQL statements and BI tools.

By defining referential constraints, you can set up the database to control the semantic accuracy of the data it contains. To define a referential constraint, you must create a primary key in the parent table and a foreign key in the dependent table.

You must also define what actions are allowed when data is added or modified. This is accomplished with a set of rules applied to each relationship. The combination of the primary and foreign key columns and the rules that dictate the data that can be housed in those key columns can be defined to ensure correct and useful relational databases.

So, it is a good physical database design practice to implement referential integrity using database constraints.  

Answer:

c. decimal, encoded

Explanation:

Decimal: in this type of real number constant, it consists of not more than 63 digits and either includes a decimal point or not within the range of binary integers e.g 37.5

Encoded: in this type of real number constant, it is used to put number, letter into a specialized format for efficient transmission or for storage e.g code used for text by most computers is (ASCII).

Answer:

The required code is given below with appropriate comments for better understanding

Explanation:

public class Population

{

  public static void main(String[] args)

  {

      int currentPopulation=312032486;

      int numSecInyear=24*60*60*365;//for one day 24 hours,60 min,60 sec

      System.out.println("current population:"+currentPopulation);

      int numBirths=numSecInyear/7;

      int numDeaths=numSecInyear/13;

      int numImmigrant=numSecInyear/45;

      //print the result using for loop

      for(int i=1;i<=5;i++){

          currentPopulation=currentPopulation+numBirths-numDeaths+numImmigrant;//add up births and immigrants, remove deaths

          System.out.println("Population After year-"+i+":"+currentPopulation);

      }

  }

}

Sure! Here's a Python program to calculate and display the population for each of the next five years based on the provided assumptions:

#constants

BIRTH_RATE = 1 / 7

DEATH_RATE = 1 / 13

IMMIGRANT_RATE = 1 / 45

SECONDS_PER_YEAR = 365 * 24 * 60 * 60

# Initial population

population = 312032486

# Calculate population for each of the next five years

for year in range(1, 6):

   # Calculate the change in population for one year

   births = SECONDS_PER_YEAR // 7

   deaths = SECONDS_PER_YEAR // 13

   immigrants = SECONDS_PER_YEAR // 45

   population_change = births - deaths + immigrants

   # Update the population

   population += population_change

   # Display the population for the current year

   print(f"Population after {year} year(s): {population}")

This program first defines constants for birth rate, death rate, immigrant rate, and the number of seconds in a year. Then, it initializes the population variable with the current population. It calculates the population change for each of the next five years based on the provided rates, updates the population accordingly, and prints the population for each year.

Answer:

import java.util.Scanner;

public class CountVowelsModularized {

   public static void main(String[] args) {

       Scanner in = new Scanner (System.in);

//Prompt user to enter a string, receive it and assign to a variable        

System.out.println("Enter a string Value");

       String word =in.nextLine();

//Calling the method numVowels and passing the string

       System.out.println("The Number of vowels are " +numVowels(word.toLowerCase()));

   }

}

The method definition and complete program is given in the explanation section

Explanation:

import java.util.Scanner;

public class CountVowelsModularized {

   public static void main(String[] args) {

       Scanner in = new Scanner (System.in);

       System.out.println("Enter a string Value");

       String word =in.nextLine();

       System.out.println("The Number of vowels are " +numVowels(word.toLowerCase()));

   }

   public static int numVowels(String string) {

       int counter = 0;

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

           if (string.charAt(i) == 'a' || string.charAt(i) == 'e' || string.charAt(i) == 'i'

                   || string.charAt(i) == 'o' || string.charAt(i) == 'u') {

               counter++;

           }

       }

       return counter;

   }

}

Final answer:

The CountVowelsModularized program is a Java application that counts the number of vowels in a string via a dedicated method. The program treats 'a', 'e', 'i', 'o', and 'u' as vowels and does not count 'y'. The solution demonstrates a modular design in which functionality could be easily modified or expanded.

Explanation:

The question asks to write a program named CountVowelsModularized which includes a method that counts the number of vowels in a provided string. In this case, the vowels to be counted are a, e, i, o, and u. The letter y will not be considered a vowel for this particular task. Below is an example code written in Java that demonstrates how you could implement such a program:

This modularized approach provides a clear path to expand or modify the program, should the definitions of vowels change or additional functionality be required.

Answer:

David can apply filter to the data in order to show only records that meet the criteria.

Explanation:

Answer:

The answers to each question are explained below

Explanation:

Who was king in the year 1000? Give the name and nickname.

Query:

       SELECT name, nickname FROM Kings

      WHERE beginReign <=1000 AND endReign >=1000;

Explanation:

SELECT is used to query the database and get back the specified fields.

name and nickname are columns of Kings table.

FROM is used to query the database and get back the preferred information by specifying the table name.

Kings is a table name.

WHERE is used to specify a condition based on which the data is to be retrieved. The conditions are as follows:

beginReign <=1000

endReign >=1000

AND clause between the conditions indicate that both the conditions must be true.

Find all the pairs of kings or queens (A,B) such that A was the great grandchild of B.

Query:

       SELECT p.child, ggp.parent

       FROM Parents p, Parents gp, Parents ggp

       WHERE p.parent = gp.child AND gp.parent = ggp.child;

Explanation:

SELECT is used to query the database and get back the specified fields.

child is a column of Parents table aliased as p(parent).

parent is a column of Parents table aliased as ggp (great grand father).

FROM is used to query the database and get back the preferred information by specifying the table name.

parents is a table name. Three aliases named p(parent), gp(grand father) and ggp(great grand father) are created.

WHERE is used to specify a condition based on which the data is to be retrieved. The conditions are as follows:

p.parent = gp.child

gp.parent = ggp.child;

AND clause between the conditions indicate that both the conditions must be true.

Find the names of those kings or queens that were the parent of two or more kings or queens. List each such person only once.

Query:

       SELECT parent FROM Parents

       GROUP by parent

       HAVING COUNT(*) > 1;

Explanation:

SELECT is used to query the database and get back the specified fields.

parent is a column of Parents table .

FROM is used to query the database and get back the preferred information by specifying the table name.

parents is a table name.

Group by clause is used to group the data on column parent.

Having clause specifies the condition based on which the data is to be retrieved.

Find for each house the number of kings or queens of that house.

Query:

       SELECT house, COUNT(name)

       FROM Kings

       GROUP by house;

Explanation:

SELECT is used to query the database and get back the specified fields.

house is a column of Kings table .

FROM is used to query the database and get back the preferred information by specifying the table name.

Kings is a table name.

Group by clause is used to group the data on column house.

Several times in British history, kings or queens have deposed one another, so that their reigns overlapped. Find all such pairs, listing the pairs in both orders; i.e., list both (A,B) and (B,A). However, be careful not to list pairs A and B where the only overlap is that A's reign ended in the same year that B's began, or vice-versa.

Query:

      SELECT k1.name, k2.name FROM Kings k1, Kings k2

      WHERE k1.name <> k2.name

      AND k1.beginReign < k2.beginReign

      AND k2.beginReign < k1.beginReign;

Explanation:

SELECT is used to query the database and get back the specified fields.

name is a column of Kings table.

FROM is used to query the database and get back the preferred information by specifying the table name.

Kings is a table name. Two aliases named k1 and k2 are created.

WHERE is used to specify a condition based on which the data is to be retrieved. The conditions are as follows:

k1.name <> k2.name

k1.beginReign < k2.beginReign

k2.beginReign < k1.beginReign;

AND clause between the conditions indicate that both the conditions must be true.

AND clause between the conditions indicate that both the conditions must be true.

Hence, AND clause between the conditions indicate that both the conditions must be true.

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Answer:

Assembler

Explanation:

Assembler is a type of utility program that is used to change the assembly language to machine code. it utilized the commands from assembly code to change them to binary code.

it used to change 2 types of symbols like assembler symbol and programmer symbols.

it makes the work easily by converting the language code into a readable form to the operating system.

The utility program which reads an assembly language source file and produces an object file is; Choice C: Assembler

Assemblers are share quite some similarities to compilers in that they produce executable code.

However, An assembler is a utility program which converts assembly language into machine code. This is done by taking the basic commands and operations from assembly code and converts them into binary code that can be recognized by a specific type of processor.

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Answer: all of the above

Explanation:

Answer:

intNum = int(input("Enter an Integer "))

for i in range(1,intNum):

   print(i)

Explanation:

Firstly and integer variable intNum is declared. Using Python's input function, we prompt the user to enter a value and assign it to intNum

Then we use the range function to iterate from the integer 1 up to but not including intNum and print out the values.

see sample code and output attached

The code for printing the one number per line is,

#Prompt the user to enter the input.

num_str = input ("Input an int: ")

#Run the loop from 1 to (num_str - 1).

for k in range(1, num_str):

#Display the value of k.

 print k

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Answer:

# include<iostream>

#include<conio.h>

using namespace std;

main()

{

float f, c;

cout<<"enter temperature in Fahrenheit ="

cin<<f;

c=(f-32)/1.8;

cout<<"/n Temperature in Celsius ="<<c;

getch();

}

Explanation:

The conversion formula from Fahrenheit to Celsius is given as:

C= (F-32) x 5/9

we take an input in Fahrenheit and put in above formula and covert it in Celsius.

To Temperature conversionfrom Fahrenheit to Celsius, the formula is 'temperatureCelsius = (temperatureFahrenheit - 32) * 5/9'. This can be implemented as a statement in a program to assign a variable as needed, and the specifics of use will depend on the requirements of the program and language used.

To convert Fahrenheit to Celsius, we use the formula:

temperatureCelsius = (temperatureFahrenheit - 32) * 5/9

In programming, you can implement it as a statement that assigns the Celsius equivalent to a variable:

Example in Java:

int temperatureFahrenheit = 77;

double temperatureCelsius = (temperatureFahrenheit - 32) * 5.0/9.0;

System.out.println(temperatureCelsius);

This will directly convert the Fahrenheit temperature to Celsius. The specifics of how you would use this statement depend on the requirements of your program and the programming language you're using.

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#SPJ6

Answer:

Explanation:

Yes we could find microprocessors almost everything even in ourself because this technology revolution is stronger day to day, and smart thing is the future, there are smartphones, watch, even houses, nowadays there are houses and hotels with smart technology even in the curtains, with a voice command we can program activities like wash or clean, and all these products have microprocessors.

Answer:

Port 3389 is used for remote desktop access to graphical interfaces.

The syntax used to track ping traffic is " tcp.port eq 25 or icmp".

Explanation:

Wireshark is a network packet sniffer tool used to analysing and troubleshooting packet transmission in a network.

The ping command is used in a network to check or confirm connectivity between two devices in the network. It sends ICMP message echos to the specified IP address and receives it back if there is connection. To get the ping traffic in wireshark the command syntax " tcp.port eq 25 or icmp" is used.

The port 3389 is a TCP and UDP listening port for the Microsoft proprietary protocol called remote desktop protocol or connection used to remotely connect to the graphical interface of other system running the RDP server.

Answer: FALSE

Explanation:-N-tier application architecture is a system by which developers can make flexible and reusable applications. By separating an application into tiers developers can easily modifying or add particular layer, instead of working on already existing application.

N-tier architectures can be classified into three tiers known as

PRESENTATION TIER(main function is to receive and transfer data to the logic tier and in turn recieve information from the logic tierand transfer to the user).

LOGIC TIER( it does all the calculations and through logic process data accordingly).

DATA TIER( information are stored and retrieved to the logic tier for processing and transfer). Generation of information happens in the third tier(Data tier).

C. Users are given access to the records accessible by the users who are below the role hierarchy.

The owner and system admin normally has the super user account, then they would assign roles and hierarchy to each department heads and members which roles and modules are lower type of user access compared to them.

Answer:

The solution code is written in Python:

Explanation:

Presume that there is existence of Rectangle class as given in the question, Carpet class is written. The Carpet constructor is defined that take Rectangle object, rect, and cost as parameter (Line 2). To create data member of Carpet class, keyword "self" is used to precede with the name of the data members, size and costPerSqFoot (Line 3-4). The data members are initialized with the parameter rect and cost, respectively.

Next, cost method is defined (Line6 - 8). Within the cost method, the area method of Rectangle object is invoked by expression, self.size.area() and this will return the area value and multiplied with the costPerSqFoot to get the carpet cost and return it as output (Line 8).