Cuál es el objetivo principal de una clave primaria?

La clave principal le permite crear un identificador único para cada fila de su tabla. Es importante porque le ayuda a vincular su tabla a otras tablas (relaciones) utilizando la clave principal como vínculos.

Which command will allow you to underline and boldface text on multiple pages using fewer mouse clicks?

Animation Painter

Animation

Format Painter

1. Programmable logic controllers (also called
PLCs) are used to control machines and other
industrial applications with
instead
of using hard-wired devices.

Three reasons why users attach speakers to their computers.

Provide examples of how information technology has created an ethical dilemma that would not have existed before the advent of I.T.

which of the following is an example of how to effectively avoid plagiarism

4. What is a motion path?​

Can someone help me with this lab assignment? I really do not know what should I do?
This assignment
The program you wrote in Stacks 1 is incomplete. Without a destructor it creates a memory leak. A destructor has been defined in this program but it is incorrect. To visualize how the destructor works, a cout statement has been added. Fix the errors, including the cout statement, to display the value in each node of the stack before releasing the memory.
Write a loop in main() to enter an unknown number of positive integers. The loop stops when you enter 0 or a negative number. As you are entering integers, they are to be pushed onto a stack.
Ex.: If the user enters '10 20 30 -1` the output (from the destructor) should be:
30 - deleted!
20 - deleted!
10 - deleted!
Empty stack!
Ex.: If the user enters '-1` the output should be:
Empty stack!
This is the code:
#include
using namespace std;
class Stack_int
{
private:
// Structure for the stack nodes
struct StackNode {
int value; // Value in the node
StackNode *next; // Pointer to next node
};
StackNode *top; // Pointer to the stack top
int length; // Number of nodes
public:
Stack_int(){ top = NULL; length = 0; } //Constructor
~Stack_int(); // Destructor
// Stack operations
// bool isEmpty();
bool push(int);
// int pop();
// int peek();
// int getLength();
};
/**~*~*
Member function push: pushes the argument onto the stack.
*~**/
bool Stack_int::push(int item)
{
StackNode *newNode; // Pointer to a new node
// Allocate a new node and store num there.
newNode = new StackNode;
if (!newNode)
return false;
newNode->value = item;
// Update links and counter
newNode->next = top;
top = newNode;
length++;
return true;
}
/**~*~*
Destructor
*~**/
Stack_int::~Stack_int()
{
StackNode *currNode;
// Position nodePtr at the top of the stack.
currNode = top;
// Traverse the list deleting each node.
while (currNode)
{
cout << currNode->value << " - deleted!" << endl;
delete currNode;
currNode = NULL;
currNode = currNode->next;
}
cout << "Empty stack!" << endl;
}
int main() {
Stack_int s;
int item;
return 0;
}

a buffer storage that improve computer performance by reducing access time is​

11 Select the correct answer. Which external element groups items in a design?
A coloring items
B. sorting items
c. underlining items
D directing items blurring items​

Which of the following statements are true about the code shown below in the class named Quiz? (Select all that apply.)

public class Quiz {
public static void printOdd(int n) {
for(int i = 0; i < n; i++){
if(i % 2 != 0)
System.out.println(i);
else
System.out.println(i+1);
}
}

public static void main(String arg[]) {
printOdd(5);
}
}

a. A value of 5 will be substituted for the parameter during the execution of the printOdd method.
b. This method will print a list of all even numbers less than n.
c. This method when executed as called by main will print out 5 lines of output.
d. This method when executed as called by main will print out 1 line of output.
e. A value of 5 is being returned to main from the printOdd method after execution.

write a c program to insert and delete values from stack( to perform pop and push operations) using an array data structure

Is the ASSIGN statement a data entry statement, true or false?

If a system contains 1,000 disk drives, each of which has a 750,000- hour MTBF, which of the following best describes how often a drive failure will occur in that disk farm:

a. once per thousand years
b. once per century, once per decade
c. once per year, once per month
d. once per week
e. once per day
f. once per hour
g. once per minute
h. once per second

Write a program named HoursAndMinutes that declares a minutes variable to represent minutes worked on a job, and assign a value to it. Display the value in hours and minutes. For example, 197 minutes becomes 3 hours and 17 minutes.'

Which language paradigm interacts well with database systems in business environments that use SQL? (I WILL GIVE BRAINLIEST TO THE RIGHT ANSWER

aspect-oriented
data-oriented
fourth-generation
logic-based

e Highlight
fogy
ст)
4 uses of information
communication technology in the health sector​

The new software organization requires a new point of sale and stock control system for their many stores throughout Pakistan to replace their aging mini-based systems.
A sales assistant will be able to process an order by entering product numbers and required quantities into the system. The system will display a description, price, and available stock. In-stock products will normally be collected immediately by the customer from the store but may be selected for delivery to the customer's home address for which there will be a charge. If stock is not available, the sales assistant will be able to create a backorder for the product from a regional warehouse. The products will then either be delivered directly from the regional warehouse to the customer's home address, or the store for collection by the customer. The system will allow products to be paid for by cash or credit card. Credit card transactions will be validated via an online card transaction system. The system will produce a receipt. Order details for in-stock products will be printed in the warehouse including the bin reference, quantity, product number, and description. These will be collected by the sales assistant and given to the customer. The sales assistant will be able to make refunds, provided a valid receipt is produced. The sales assistant will also be able to check stock and pricing without creating an order and progress orders that have been created for delivery.
You need to answer the following questions.
1. Which elicitation method or methods appropriate to discover the requirement for a given scenario system to work efficiently, where multiple sales and stock points manage. Justify your answer with examples.
2. Identify all stakeholders for a given scenario according to their roles and responsibilities with suitable justifications.
3. Specify functional users and systems requirements with proper justifications.

Write a C++ function with the following signature: void readAndConvert() The function takes no parameters and returns no value. Instead, it reads its input from std::cin and writes its output to std::cout. Both the input and output are information describing a sequence of stock trades, albeit in different formats. Input format The input will be formatted according to the following specification. You may freely assume that the input will be in the format described here; it doesn't matter what your function does with input that doesn't meet those requirements. • The first line of the input will contain a positive integer, which will specify the number of trades whose information will be present in the input. • The second line of the input will contain the stock's symbol, which is a sequence of uppercase letters. • The third line of the input will contain a brief description of the stock, which is any arbitrary sequence of characters. • After that will be one line for each trade - so the integer on the first line tells you how many more lines there will be — which will contain three pieces of information separated by spaces! • A positive integer specifying the number of shares traded. o The price paid for each share, which is a number that will always have exactly two digits after the decimal point. • A sequence of lowercase letters that specifies a confirmation number for the trade. One example input that follows that format is as follows, though your function would need to work on any input that follows the specification, not just the one example. BOO Forever Boo Enterprises 100 50.00 barzxfq. 200 60.75 hhpncstvz 150 7.90 cjjm 175 100.15 fryzyt Output format Your function's output is a reorganization of the information from the input, which you would write in the following format. • The first line of output would contain the description of the stock, followed by a space, followed by the symbol surrounded by parentheses. • Each subsequent line of output describes one of the trades from the input, in the following format: o The confirmation number, followed by a colon and a space, followed by the integer number of dollars spent in the order (i.e., the number of shares times the price per share, always rounding to the floor of the number). The correct output for the example input above is as follows. Forever Boo Enterprises (BOO) barzxfq: 5000 hhpncstvz: 12150 cjjm: 1185 fryzyt: 17526 It is irrelevant whether your program prints all of the output only after reading the input, or whether it prints the output while it reads input; this is your choice. The only requirement is that your output meets the formatting requirements.

Differences between dot_mattix printer and a line printer

Which best describes the possible careers based on
these employers?
Yoshi worked in Logistics Planning and Management
Services, Dade worked in Sales and Service, Lani
worked in Transportation Systems/Infrastructure
Planning, Management, and Regulation, and Miki
worked in Transportation Operations.
Yoshi worked in Transportation Operations, Dade
worked in Logistics Planning and Management
Services, Lani worked in Sales and Service, and Miki
worked in Transportation Systems/Infrastructure
Planning, Management, and Regulation
Yoshi worked in Health, Safety, and Environmental
Management, Dade worked in Transportation
Operations, Lani worked in Facility and Mobile
Equipment Maintenance, and Miki worked in
Warehousing and Distribution Center Operations.

Consider a model of a drone to deliver the orders of the customers within the range of 20 km of the coverage area.

Identified at least 5 factors (inputs) required to experiment with the above mention system model (e.g. speed of the drone).


Write down the levels (range or setting) for each factor mentioned above. (e.g. speed ranges from 10km/h to 30km/h).


On what responses (results) will you analyses the experiment’s success or failure (e.g. drone failed to deliver the package on time), mention at least 3 responses

I
Moving to another question will save this response
uestion 1
A field in the logical design of a database corresponds to a row in the physical table of a relational database.
O True
O False
Moving to another question will save this response
Type here to search
o​

The divBySum method is intended to return the sum ofall the elements in the int arrayparameter arr that are divisible by the intparameter num. Consider the following examples, in whichthe array arrcontains {4, 1, 3, 6, 2, 9}.The call divBySum(arr, 3) will return 18,which is the sum of 3, 6, and 9,since those are the only integers in arr that aredivisible by 3.The call divBySum(arr, 5) will return 0,since none of the integers in arr are divisibleby 5.Complete the divBySum method using anenhanced for loop. Assume that arr isproperly declared and initialized. The method must use anenhanced for loop to earn full credit./** Returns the sum of all integers inarr that are divisible by num* Precondition: num > 0*/public static int divBySum(int[] arr, int num)

Three reasons why users attach speakers to their computer

The American Red Cross wants you to write a program that will calculate the average pints of blood donated during a blood drive. The program should take in the number of pints donated during the drive, based on a seven hour drive period. The average pints donated during that period should be calculated and displayed. Use a loop in the program to run multiple times.

in the lungs,blood picks up carbon dioxide and releases oxygen true or false

Write a function that takes number between 1 and 7 as a parameter and prints out the corresponding number as a string. For example, if the parameter is 1, your function should print out one. If the parameter is 2, your function should print out two, etc. If the parameter is not between 1 and 7, the function should print an appropriate error message. In your file, you should include a main() that allows the user to enter a number and calls your function to demonstrate that it works.

Suppose you are a merchant and you decide to use a biometric fingerprint device to authenticate people who make credit card purchases at your store. You can choose between two different systems: System A has a fraud rate of 1% and an insult rate of 5%, while System B has a fraud rate of 5% and an insult rate of 1%. Fraud rate is the chance that another person is incorrectly authenticated as you, while insult rate is the chance that you are not successfully authenticated as you.

Required:
Which system would you choose and why?

Create a public class called Exceptioner that provides one static method exceptionable. exceptionable accepts a single int as a parameter. You should assert that the int is between 0 and 3, inclusive.
If the int is 0, you should return an IllegalStateException. If it's 1, you should return a NullPointerException. If it's 2, you should return a ArithmeticException. And if it's 3, you should return a IllegalArgumentException.

Explain what an IM is, and what is the technology shown in the accompanying figure