. Use one command to create a /sales directory with the permissions of 770

Answer:

// here is code in C++(bmi.cpp).

#include <bits/stdc++.h>

using namespace std;

// main function

int main()

{

   // variables

float weight,height;

cout<<"enter the weight(in kilograms):";

//read the weight

cin>>weight;

cout<<"enter the height(in meters):";

//read the height

cin>>height;

// calculate the bmi

float bmi=weight/(pow(height,2));

// print the body-mass index with two decimal places

cout<<"BMI is: "<<fixed<<setprecision(2)<<bmi<<endl;

return 0;

}

Explanation:

Read the weight from user and assign it to variable "weight",read height and assign it to variable "height".Then find the body-mass index as (weight/height^2).Here weight  should be in kilograms and height should be in meters.

Output:

enter the weight(in kilograms):75

enter the height(in meters):1.8

BMI is: 23.15

Final answer:

The C++ program calculates a user's BMI by asking for their weight in kilograms and height in meters, then outputs the result with two decimal places using the formula BMI = Weight / height².

Explanation:

The Body Mass Index (BMI) is an important measurement used to categorize weight categories that could lead to health issues. In this C++ program, the user will be prompted to enter their weight in kilograms and height in meters. The program will then calculate their BMI using the formula BMI = Weight / height² (kg/m²), and display it on the screen with two decimal places.

Here is a sample C++ program that calculates BMI:

#include <iostream>
#include <iomanip>
using namespace std;
int main() {
  double weight, height, bmi;
  cout << "Please enter your weight in kilograms: ";
  cin >> weight;
  cout << "Please enter your height in meters: ";
  cin >> height;
  bmi = weight / (height * height);
  cout << "Your BMI is " << fixed << setprecision(2) << bmi << endl;
  return 0;
}

The program ensures the BMI is presented with two decimal places using the iomanip library functions fixed and setprecision. After compilation, the user can run the program, input their data, and get their BMI value on the screen.

Answer:

The very first command contains an error.

Explanation:

The create query is used to create the table in the database. The syntax of the create query is :

create table tablename(column1 datatype,column2 datatype ........columnn datatype);

So there is a keyword table is missing in the given query. so it is incorrect query.

INSERT INTO vehicletype VALUES (1,"truck","Ford",2000); This query is correct.

SELECT * FROM vehicletype; This query is also correct.

Answer:

// here is statement in C++ to compute square root of a variable.

double result=sqrt(discriminant);

Explanation:

Sqrt() method will compute the square root of a variable in C++.Read a value of discriminant and find the square root of it and assign it to variable "result".

Implementation in C++.

#include <bits/stdc++.h>

using namespace std;

// main function

int main()

{

  // variables

  double discriminant;

  // ask to enter discriminant

  cout<<"Enter the discriminant:";

  // read discriminant

  cin>>discriminant;

  double result=sqrt(discriminant);

  cout<<"Square root of discriminant is:"<<result<<endl;

  return 0;

}

Output:

Enter the discriminant:50                                                                                                  

Square root of discriminant is:7.07107

Answer:

This is because a device can have more than a network interface.

Explanation:

IP address has to be unique in a network but a device can have more than a network interface. This is because the device has multiple network cards and for each of the interfaces we can set up an unique ip address in a LAN. For example almost all laptops have at least two network interfaces: one is the ethernet interface, we can connect an ethernet cable to this interface. The other one is the WiFi interface, we can connect to internet using this interface.  In this case we can have more than one IP address but they have to be unique.

Answer:

  WPS is known as wireless protected setup that is basically used for the wireless security purpose. The WPS system is basically make the connection easily between the router and other network devices.

The WPS desirable as it make the connection and configuration of the network more simple with the given access point.

In WPS, the users contain the pin and it is 8 digit long pin that is basically associate with the access point.

Answer:

The first output for the following code is  given below :

1

2

The second output for the following code is given below

1

2

4

5

6

7

8

9

10

Explanation:

In the first code the loop will  iterated

When j=1 the condition of if block will not be executed  so it print 1 on console and increment the value of j.

After increment of j it becomes 2 again if block does not executed  because the condition of  if block is not  true so it print 2 on console and increased the value of j.

When j=3 if condition block is executed and   it terminate the loop immediately .

Therefore output is :

1

2

In the second code the loop will iterate

When j=1 the condition of if block is not executed  so it print 1 on console and increment the value of j.

After increment the value of j it becomes  2 .Again if block will not be executed  so it print 2 on console and increased the value of j.

After increment the value of j becomes 3.This time if block will  executed  ,it will moved directly control to the beginning of the loop and  skip the current  execution of statements that means it skip the value j=3 and increment the value of j .

Now j=4 this process is same follow untill  when j<=10 when j=11 the loop is false and loop will terminate .

Therefore output is :

1

2

4

5

6

7

8

9

10

Answer:

True.

Explanation:

In operating system memory management registers are the fastest way to access memory but their storing capacity is least .They can store data less than 1kb but the access time for register is around 5 ns.

Registers are the smallest unit of memory.The bigger the memory the more is the access time.

Hence the answer to this question is True.

Answer:

The result of the given expression is 13.

Explanation:

Here x and y are the two variable which has value 2 and 1 respectively.

x+3*4-y

Here  operator *  is more precedence then that + operator so

=2+(3*4)-1

2+12-1 now + operator  is more precedence then that - operator so

=(2+12)-1

=(14-1)

=13

Following are the program in C language

#include <stdio.h>// header file

int main() // main function

{

   int x=2,y=1; // variable declaration

   printf("%d",x+3*4-1); b// final result

return 0;

}

Output:13

Explanation:

There are three types of loops in programming languages which are as following:-

The syntax for all the three loops is different.You will see mostly for loop used with the arrays because they are easy to implement.

the syntax of for loop is :-

for(int i=initial value;condition;i++)

{

body

}

In for loops you only have to write the conditions in only line else is the body of the loop.

for example:-

for array of size 50 printing the each element

for(int i=0;i<50;i++)

{

   cout<<arr[i]<<" ";

}

You have to initialize i with 0 and the condition should be i<size of the array and then increase the counter.

Answer: If two different station are addressed with the same hardware address then there are chances of occurrence of the failure in the network at irregular intervals.The failure or error will occur because of the both the devices are seen as one by the network due to same address.

An intelligent network system id used ,it can identify the error can help in the prevention of the failure.Other option for configuring the situation is assigning the MAC(media access control)address to devices which are unique in nature thus, no device can have same address.

Answer:

Memory paging is a memory management technique that controls how memory resources are used and shared by the operating system.

The virtual memory is an alternate set of memory addresses that operating systems in conjunction with the hardware reserve to expand the total amount of addresses(real memory + virtual memory). When the program is actually executed, the virtual addresses are converted into real memory addresses.

The operating system divides virtual memory into pages to facilitate copying virtual memory into real memory, each of which contains a fixed number of addresses. When the page is needed, the operating system copies it from disk(virtual memory) to the main memory(real memory), translating the virtual addresses into real addresses.

Answer:

The correct answer is option a. "define the scope".

Explanation:

Define the scope is one critical step of project management that must take places when the planning of the project is being done. It involves defining certain critical aspects of the project such as: goals, deliverables, features, tasks, deadlines, and costs. Since BI planning includes typical project management steps, define the scope must be the first step.

Answer:

#here is code in python

# recursive function that counts the number of 1's

def bin_count(num):

   #base condition

   if num==0:

       return (0)

   elif num == 1:

       return (1)

   else:

       #recursive call

       return bin_count(num//2)+bin_count(num%2)

#read a number

num=int(input("enter a number:"))

#call the function

print("number of 1's is:",bin_count(num))

Explanation:

Read a number from user and call the function bin_count() with parameter num. In the function, if num=0 then it will return 0.If num is 1 then return 1 else it will count the number of 1's inn the binary representation of the number and return the count.

Output:

enter a number:63

number of 1's is: 6

Answer:

a.the number of cycles per second

Explanation:

The frequency of a sine wave is defined as the number of cycles per second.

Frequency is the inverse of the time period. The frequency of a sine wave is given by 1/TimePeriod . It is generally expressed in units of Hertz(Hz) or sec^-1. Larger the time period, lower will be the frequency and vice versa. So for higher frequency waves we need to ensure that the time period is small.

Answer:b)With a wavy blue underline

Explanation:Wavy blue lines in the Word document is for representing that the Format consistency checker is in working/on mode .It can identify the inconsistent format instances for the correction while the user is writing the text.

Other options are incorrect because wavy red line is for incorrect spelling of any word and wavy green line signifies the grammatical mistake .The function is available for the format inconsistency as wavy blue line in Word .Thus, the correct option is option(b).

Answer:

Backward Compatibility

Explanation:

Answer:

// here is code in c++.

#include <bits/stdc++.h>

using namespace std;

// function that return greatest common divisor

int g_c_d(int num1, int num2)

{

if (num1 == 0)

 return num2;

return g_c_d(num2 % num1, num1);

}

// main function

int main()

{

// variables

int num1,num2;

cout<<"enter two numbers:";

// read two numbers from user

cin>>num1>>num2;

// call the function and print the gcd of both

cout<<"greatest common divisor of "<<num1<<" and "<<num2<<" is "<<g_c_d(num1.num2)<<endl;

}

Explanation:

Read two numbers from user and assign them to variables "num1" and "num2".Call the function g_c_d() with parameter "num1" and "num2".According to Euclidean algorithm, if we subtract smaller number from the larger one the gcd will not change.Keep subtracting the smaller one then we find the gcd of both the numbers.So the function g_c_d() will return the gcd of both the numbers.

Output:

enter two numbers:5 9

greatest common divisor of 5 and 9 is 1

enter two numbers:-25 15

greatest common divisor of -25 and 15 is 5

The Euclidean algorithm is used to find the greatest common divisor of two integers, which is implemented in a Python program that works with both positive and negative integers. An example demonstrates that the GCD of 48 and 18 as well as -48 and 18 is 6.

The question involves writing a program that uses the Euclidean algorithm to calculate the greatest common divisor (GCD) of two integers. The Euclidean algorithm is a method for finding the greatest common divisor of two numbers, which is the largest number that divides both of them without leaving a remainder.

The program will take two integers as input and provide their greatest common divisor as output. To accommodate both positive and negative input values, the algorithm can be implemented as follows in Python:

def gcd(a, b):
   while b != 0:
       a, b = b, a % b
   return abs(a)

# Examples using the function
gcd_result1 = gcd(48, 18)
print(f'The GCD of 48 and 18 is {gcd_result1}')

# The function can also handle negative values
gcd_result2 = gcd(-48, 18)
print(f'The GCD of -48 and 18 is {gcd_result2}')

This example demonstrates that the greatest common divisor of 48 and 18 is 6, and the GCD of -48 and 18 is also 6 because the GCD is always a non-negative number.

Answer:

AB4F=1010101101001111.

Explanation:

Every bit of hexadecimal number is a 4 bit binary number.So to convert a number from hexadecimal to binary number by finding the corresponding binary number for each bit of hexadecimal number and then write it in the same sequence.

A=1010

B=1011

4=0100

F=1111

Writing in the same sequence of the hexadecimal number.

AB4F = 1010101101001111.

Answer:a.) The program is halted and the default exception handler handles the exception

Explanation: If a exception is left out by the program handler then the processing is stopped and the control of exception handling is done to another handler. The unchecked exception is thus handled by the default exception handler.

Exception occur in the executing programs that try to stop the function by terminating it .The method used for the handling of the program is try catch and throw technique. Unchecked exception are found while the run-time and thus target the processing of the program.Thus,the correct option is option(a).

Other options are incorrect because the current program cannot handle the exception as it has left it unchecked, exception cannot be ignored because it stops the program and compilation error will not be caused.

Final answer:

The expression evaluated by a switch statement must have a discrete value, which allows it to be compared with a set of predefined case values. Typically, the switch statement works with integral or enumerated types, and sometimes strings, in various programming languages.

Explanation:

The expression that is tested by a switch statement must have a discrete value. This means that the expression must evaluate to a single value that can be checked against a series of case values. In programming languages like Java or C++, the switch statement typically works with discrete, integral values like integers or enumerated types, and in some languages, it also works with strings. The switch statement then executes the code block associated with the first case that matches the value of the expression, providing a cleaner and more efficient alternative to a lengthy series of if-else statements.

For example, consider a switch statement that evaluates a variable representing a day of the week:

Here, the switch statement will execute the code block associated with case 3, since the value of day is 3. The key here is that the value of the expression (the variable 'day' in this example) must be discrete so that it can be compared against the case labels.

Final answer:

A switch statement requires a "discrete value" for its expression, and is used to control the flow of execution in a program. A break statement is often used to exit the switch after a match is found, following the evaluation of a boolean condition.

Explanation:

The expression that is tested by a switch statement must have a discrete value. A switch statement allows for multiple tests to be conducted to determine the proper course of action. It is typically used when you have several if statements that apply to the same variable or when there are multiple nested logic statements that control the flow of the code.

In a switch statement, each case is tested in sequence until a match is found or the end of the switch is reached. To prevent the execution from continuing through subsequent cases, a break statement is often used. The condition in the switch statement that selects the branch is called a condition.

It is important to note that the alternatives in the switch statement are referred to as branches. These branches represent different paths the program's execution can take. Each branch is contingent upon a condition, which is the boolean expression that determines which path is executed. If the condition for a case is true, that branch is executed.

Answer:

 Sensitivity analysis is the method in which it basically predict the final outcome of the decision. It analysis each variable individually and identify the dependency of the output value on the particular value of the input.  

The advantage of the sensitivity analysis is that it reduce the overall risk of the particular strategy and also impact of the system.

It basically work on the basic principle that firstly changed the structure and model and then observe the particular behavior of the model.

Answer: Prompt

Explanation:

 The prompt statement is basically used to define the users about the details that what to enter on the screen that is displayed and sort the input data so that it can easily enter.

In the program, the prompt statement and the dialog boxes are used to enter the input data or information in the terminal screen and window.

For example:  

In the C++ language, the std::cout function is basically used for the output value and the std::cin function is used to get the input value.

In the java programming, the system.out.ptintln() function is basically used to tell the users to enter the input value in the program.  

Answer:

 The subu instruction are the type of the immediate arithmetic operation which basically give the binary result in the 32 bits that are stored in the destination register.

The subu instruction typically represent as subtract unsigned. It basically check the overflow of the unsigned number.

The sub instruction basically subtracts the second source operand from the principal source operand, and stores the outcome in the goal operand. This instruction basically used in the pseudocode to perform various tasks.

Answer:

// here is code in C++.

#include <bits/stdc++.h>

using namespace std;

// function

string is_perfect(int n)

{

   // string variables

   string str;

   // if number is negative

   if (n < 0)

   {

        str="invalid input.";

   }

   // if number is positive

   else

   {

      int a=sqrt(n);

      // if number is perfect square

      if((a*a)==n)

      {

          str="True";

      }

      // if number is not perfect square

      else

      {

          str="False";

      }

   }

   // return the string

     return str;

}

// main function

int main()

{

   // variables

int n;

cout<<"enter the number:";

// read the value of n

cin>>n;

// call the function

string value=is_perfect(n);

// print the result

cout<<value<<endl;

return 0;

}

Explanation:

Read a number from user and assign it to variable "n".Then call the function is_perfect() with parameter n.First check whether number is negative or not. If number is negative then return a string "invalid input".If number is positive and perfect square then return a string "True" else return a string "False".

Output:

enter the number:-3

invalid input.

enter the number:5

False

enter the number:16

True

E-commerce deals with a wide range of products and services on the internet. Therefore, it is crucial to recognize security and a high degree of confidence required in the authenticity and privacy of online transactions. Sometimes, it can be challenging to trust the internet where these kinds of transactions are made; thus, the need for cryptography. Cryptography provides data security and reduces the risk of cybercrimes, such as hacking and phishing.

Modern Cryptography services can be seen as data authentication, user authentication, data confidentiality, and no-repudiation of origin. The most common type of cryptographic tools and techniques is the use of the RSA Algorithm. It is used for securing communications between web browsers and e-commerce sites. The interactions make use of an SSL certificate, which is based on public and private keys. PKI (Public-Key Infrastructure) is also another excellent example of cryptographic tools and techniques. Based on several things, PKI is used to identify or authenticate the identity of the other party on the internet.

Answer: implemented

Explanation:I used a bit of deductive logic. Design would be something with parameters and or boundaries like designing a home. Programmed just didn’t seem to fit in because there is no room for creative thinking. Approved? By whom?, you design something to reach a goal and follow to a degree what you designed, maybe within the walls you can add a closet or with design classes they are designed for a purpose but there must be ideas within a design that come up. So implemented makes sense so you have a design that seems to fit and certainly can be implemented meaning it can be used for a purpose to teach or help.

Answer:

UPDATE acctmanager WHERE amid = 'J500';

Explanation:

The statement written above is not valid SQL statement because there is no SET after UPDATE. Update is always used with SET.If you are updating something then you need to specify the value with which that value should be replaced.

UPDATE acctmanager SET amname = UPPER(amname);

This statement does not contains WHERE clause but it will run all the values of amname column will get updated in the table acctmanager.

Answer:

 Some websites like proxy bypass and virtual private network (VPN) prohibited the anonymity as it affected the surfer during long rum in the system.

The proxy bypass is the type of the server that mainly used in the local address. The proxy is the type of he intermediate server which basically stand in the computer and also in the remaining part of the internet. This is basically used in the corporate for the network protection for using the content in the system.

Answer:

[tex]C = a./b[/tex]

Explanation:

In MATLAB, the following command:

[tex]C = A./B[/tex]

Performs the element by elemet division of A and B. This comand is called Right-array division.

So, in your case, we could divide A by B element by element, only using fully-vectorised code (ie. no loops), with the following code:

[tex]a = [2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 33 34 35 36 37 38 39 40];

b = [1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 43 45 47 49 50 54 59 60];

C = a./b[/tex];

C would be the element by element division of A and B, with no loops.