Answer:
// here is code in C++.
#include <bits/stdc++.h>
using namespace std;
// main function
int main()
{
// variable
double height;
// gravitational acceleration
double g=9.8;
cout<<"Please enter initial height:";
cin>>height;
// h=ut+(gt^2)/2
// here u, initial velocity is 0
// after simplification
double t=sqrt(2*height/g);
// print the time
cout<<"time taken by ball to hit the ground is:"<<t<<" seconds"<<endl;
return 0;
}
Explanation:
Read the initial height from user. Declare and initialize the earth gravitational acceleration "g=9.8" .Then the equation is h=ut+(gt^2)/2, here u is initial velocity which is 0.Then after simplify the equation t=sqrt(2*h/g). Put the values in the equation and find the time taken by ball to hit the ground.
Output:
Please enter initial height:100
time taken by ball to hit the ground is:4.51754 seconds
Final answer:
A Python program calculates the time a ball takes to reach the ground when dropped from a given height, illustrating basic principles of free fall in physics. For a 100 m tower, the time is approximately 4.51 seconds.
Explanation:
A student has asked to write a program that computes the time it takes for a ball to hit the ground when dropped from a tower of height h meters, assuming no air resistance. The formula to calculate the time t is derived from physics: t = √(2h/g), where g is the acceleration due to gravity, approximately 9.81 m/s². Using this formula, we candevelop a program in Python to ask the user for the height h and then compute and print the time t. To demonstrate, if the program is used with a tower height of 100 meters, the calculated time for the ball to reach the ground would be approximately 4.51 seconds.
Example Python Program
import math
def drop_time_from_height(height):
g = 9.81 # Gravity in m/s²
time = math.sqrt(2 * height / g)
return time
height = float(input("Enter the height of the tower in meters: "))
time = drop_time_from_height(height)
print("The ball takes", round(time, 2), "seconds to hit the ground.")
This program illustrates a straightforward approach to solving problems related to free fall and physics calculations, enhancing the understanding of concepts such as gravity and acceleration.
What is meant by the term drill down?
Answer:
The drill down term is basically used in the information technology for the explore the multidimensional information or data by navigating the different layers of the data from the web page applications.
Drill down basically involve in the database by accessing the specific information through the database queries. Each query basically increase the data granularity. This term is also involve with the link for represent the details more specifically.
The drill down is the simple approach or technique for dividing the complex problems into small parts so that it make the technique more efficient.
Write an efficient C++ function that takes any integer value i and returns 2^i ,as a long value. Your function should not multiply 2 by itself i times; there are much faster ways of computing 2^i.
Answer:
long power(int i)
{
return pow(2,i);
}
Explanation:
The above written function is in C++.It does not uses loop.It's return type is long.It uses the function pow that is present in the math library of the c++.It takes two arguments return the result as first argument raised to the power of second.
for ex:-
pow(3,2);
It means 3^2 and it will return 9.
Discuss operations of vectors in computer graphics?
Answer:
In the computer graphics, the vectors are basically used to compose various type of components. In the computer graphics it is basically known as vector graphics and it is composed of various types of components.
The operation of the vector in the computer vector is that it is basically used to create the digital images by the use of mathematical statement and command.
It is used to place the lines and the shape in the two- dimension and three- dimension spaces. IN the computer graphics, vectors are also used to represent the particular direction of the various objects.
Write a program with the following output: ( Notice the beeline and space). Hello world! Hello
Answer:
#include <iostream>
using namespace std;
int main() {
cout<<"Hello world! Hello";//statement to print the statement.
return 0;
}
Explanation:
The above written program is in C++.In C++ cout is used to print ouput on the screen and it is called standard output.So to print Hello world! Hello you have to code
cout << "Hello world! Hello";
This will print the statement.
Answer:
Hello!
Explanation:
Which of the following clauses of the UPDATE command is optional? (Points : 2) UPDATE
SET
WHERE
FROM
Answer:
FROM.
Explanation:
UPDATE table
SET column=value,column1=value1,.....
WHERE condition;
In the UPDATE command given in the question FROM is optional because when using UPDATE we already mention the table name with update look at the syntax above.So there is no need to again mention the table name in FROM.All other three are required that is UPDATE,SET,WHERE.
in 2015, what percent of Internet users will access the web through mobile devices?
Answer:
52.7 percent.
Explanation:
In 2015 52.7 percent of the internet users accessed the internet from their mobile phones.
This number has kept on increasing throughout the years and it will keep on increasing because of the lucrative offers provided by the telecom service providers on the internet data packs and the revolution in India brought by Reliance Jio in 2016 because of which the rates of the data packs declined very sharply and also by every telecom service provider because of reliance Jio.
The network administrator is often involved in selecting and implementing network security measures such as firewalls and access codes.
True
False
Answer: True
Explanation:
Yes, the given statement is true that the network administrator are basically involve in the select and implement the various network security measures like the access code and firewall.
The network administrator is basically responsible for managing, implementing and troubleshooting the LAN areas that is local area network in the organization. The network administrator is the technology which is widely used now a days for efficient development. It is also interface with the internet and wide area networks (WAN).
Create a C++ program that declares, initializes, and outputs the values contained in a two-dimensional array
Answer:
// here is code in C++.
#include <bits/stdc++.h>
using namespace std;
// main function
int main()
{
// variables
int r_size,c_size;
cout<<"enter the number of row:";
// read the value of row
cin>>r_size;
cout<<"enter the number of column:";
// read the value of column
cin>>c_size;
// create a 2-d array
int arr[r_size][c_size];
// read the value of array
cout<<"enter the elements of array:"<<endl;
for(int x=0;x<r_size;x++)
{
for(int y=0;y<c_size;y++)
{
cin>>arr[x][y];
}
}
cout<<"elements of the array are:"<<endl;
// print the array
for(int a=0;a<r_size;a++)
{
for(int b=0;b<c_size;b++)
{
cout<<arr[a][b]<<" ";
}
cout<<endl;
}
return 0;
}
Explanation:
Here we have demonstrate a 2- dimensional array. In which, how to read the elements and how to print elements of array.Read the value of row and column from user.Create a 2-d array of size r_sizexc_size. then read the elements of array either row wise or column wise. Then print the elements.To print the elements, we can go either row wise or column.
Output:
enter the number of row:2
enter the number of column:3
enter the elements of array:
1 2 3
2 3 4
elements of the array are:
1 2 3
2 3 4
Briefly tell me what a POST request does
Answer: POST request is the concept used in world wide web(www) for the working of HTTP (hyper text transfer protocol) .It is required for sending the data to the web servers by requesting through request messages.
The functions performed by POST are uploading of file, storing file ,providing information,updating information,filling web form etc,. POST is a type of request method which also contains content as body..
The list method reverse reverses the elements in the list. Define a function named reverse that reverses the elements in its list argument (without using the method reverse!). Try to make this function as efficient as possible, and state its computational complexity using big-O notation.
Answer:
#code in python.
#function that reverse the element of list
def reverse(inp_lst):
for i in range(len(inp_lst)//2):
inp_lst[i], inp_lst[len(inp_lst) - i - 1] =inp_lst[len(inp_lst) - i - 1], inp_lst[i]
#main method
def main():
#create a list
lst1 = list(range(8))
print("list before revere:",lst1)
#call the method with list parameter
reverse(lst1)
print("list after revere:",lst1)
#create another list
lst2 = list(range(5))
print("list before revere:",lst2)
#call the method with list parameter
reverse(lst2)
print("list after revere:",lst2)
#call the main method
main()
Explanation:
In main method, create a list and call the method revers() with the list parameter. In the revers() method, swap the first element with last and second with second last. Similarly loop will run half the length of list.This will reverse the elements of the list.Then print the list before and after the revers in the main .Similarly we can test it for another list.
As the loop run for n/2 time in the method reverse(), so the complexity of the code is O(n).
Output:
list before revere: [0, 1, 2, 3, 4, 5, 6, 7]
list after revere: [7, 6, 5, 4, 3, 2, 1, 0]
list before revere: [0, 1, 2, 3, 4]
list after revere: [4, 3, 2, 1, 0]
Write an application that calculates and displays the weekly salary for an employee. The main() method prompts the user for hourly pay rate, regular hours, and overtime hours. Create a separate method to calculate overtime pay, which is regular hours times the pay rate plus overtime hours time 1.5 times rate; return the result to the main() method to be displayed
Answer:
// here is program in java.
// import package
import java.util.*;
// class definition
class Main
{
// method to calculate weekly salary
public static double fun(int h_p_r,int r_h,int o_h)
{
// calculate weekly salary
double weekly_salary=(h_p_r*r_h)+(o_h*h_p_r*1.5);
// return salary
return weekly_salary;
}
// main method of the class
public static void main (String[] args) throws java.lang.Exception
{
try{
// object to read value from user
Scanner scr=new Scanner(System.in);
// ask to enter hourly pay rate
System.out.print("enter hourly pay rate: ");
// read hourly pay rate
int hourly_pay_rate=scr.nextInt();
// ask to enter regular hours
System.out.print("enter regular hours: ");
//read regular hours
int regular_hours=scr.nextInt();
// ask to enter overtime hours
System.out.print("enter overtime hours : ");
// read overtime hours
int overtime_hours=scr.nextInt();
// call the method
System.out.println("weekly salary of an employee :"+fun(hourly_pay_rate,regular_hours,overtime_hours));
}catch(Exception ex){
return;}
}
}
Explanation:
Read hourly pay rate, regular hours and overtime hours from user.Call the method fun() with these parameters.There weekly salary is calculated by multiply regular hours with hourly_pay_rate and overtime hours with 1.5 time of hourly_pay_rate.Sum both of them, this will be the weekly salary.return this to main method and print it.
Output:
enter hourly pay rate: 20
enter regular hours: 40
enter overtime hours : 10
weekly salary of an employee :1100.0
The basic building block of a system is the _____. (Points : 6) object
attribute
message
partition
method
Answer: Object
Explanation: Object is a major part of a system that has the relevance with the real world entities.The objects are used in the object-oriented approach in the operating system for the development and maintenance of it.
It is the component that comprises of the two major factors-code and data. The code and data are for the determination of the behavior and the status of the object respectively. Other options are incorrect because they don't operate as the building block for a system.
A day has 86,400 seconds (24*60*60). Given a number of seconds in the range of 0 to 1,000,000 seconds, output the time as days, hours, minutes, and seconds for a 24- hour clock. E.g., 70,000 seconds is 0 days, 19 hours, 26 minutes, and 40 seconds. Your function should output: Time is W days, X hours, Y minutes, and Z seconds. Your function should take the number of seconds as an integer parameter Your function MUST be named howLong.
Answer:
// here is code in c++.
// include headers
#include <bits/stdc++.h>
using namespace std;
// function that calculate days, hours, minutes and seconds
void howLong(int sec)
{
// find days
int days=sec/86400;
// update the seconds
sec=sec%86400;
// find hours
int h=sec/3600;
// update the seconds
sec=sec%3600;
// find minutes
int min=sec/60;
// update the seconds
sec=sec%60;
// output
cout<<sec<<"seconds is "<<days<<" days,"<<h<<" hours,"<<min<<" minutes,and "<<sec<<"seconds."<<endl;
}
// driver function
int main()
{ // variable
int sec;
cout<<"Enter seconds:";
// read the seconds
cin>>sec;
// call the function
howLong(sec);
return 0;
}
Explanation:
Read the seconds from user.Then call the function howLong() with parameter seconds. In the function, it will first find the number of days by dividing the seconds with 86400 then update the remaining seconds.Next it will find the hours by dividing the remaining seconds with 3600 and update the remaining seconds.After that it will find the minutes by dividing the remaining seconds with 60 and update the remaining second.Then it will print the days, hours, minutes and seconds.
Output:
Enter seconds:70000
40seconds is 0 days,19 hours,26 minutes,and 40seconds.
Here's a Python implementation of the howLong function that takes the number of seconds as an integer parameter and outputs the time in days, hours, minutes, and seconds:
def howLong(seconds):
days = seconds // 86400
hours = (seconds % 86400) // 3600
minutes = (seconds % 3600) // 60
seconds = seconds % 60
return "Time is {} days, {} hours, {} minutes, and {} seconds.".format(days, hours, minutes, seconds)
Thus, we format the output string using the obtained values for days, hours, minutes, and seconds and return it.
For more details regarding python, visit:
https://brainly.com/question/30391554
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What is the downside of wider channel bandwidth?
Answer: Wider channel bandwidth has several downside or disadvantages to it. Some of these are as follow:
a) Higher channel bandwidth means lower will be the number of channels being utilized.
b) Wider bandwidth may lead to an increase in the speed but on the other hand, it'll lead to several interference problems.
Fill in the blank.
A _____ is the smallest unit of measurement used to describe computer processing storage.
Answer:
A bit
Explanation:
A bit in computing or any digital communication can be defined as the smallest unit of data of storage. In the smallest scale, nothing comes before it. It is expressed in binary value storage of 0’s or 1’s. By default, eight bits make a byte.
The ____________ is a very popular form of logic used to update a sequential file when three different types of transactions are present.
(Points : 2) match and delete rule
balance line algorithm
bilateral update algorithm
simplex sequential file rule
Answer: Simplex sequential file rule
Explanation:
The simplex sequential file rule is basically used to updated the given records in the form of order sequential file. It basically create new file which contain records that are already updated.
It contain three types of the transactions that is add, delete and change to updated the records in the sequential file. In the simplex sequential file, the transaction file records are same as the records in the master file.
On the other hand, all the given other options are incorrect because it does not involve in the transaction process.
Therefore, simplex sequential file rule option is correct.
.An algorithm specifies the actions to be executed.
True
False
Answer:
True.
Explanation:
An algorithm for a problem provides the set of instructions that are required to solve a problem.It does not provide the full code.It is like an abstract solution of a problem.It is just like a recipe for cooking a dish.It will not cook food for you but can tell you how to cook.
Since it provides the action to be executed hence the answer is True.
Answer:
true
Explanation:
Write a program that asks you to enter some integers, and press "enter" after each one.
There will be no set number of integers, and no need for data checking.
Entering the integer 0 will end the process of entering the integers
Answer:
// here is code in c++.
// headers
#include <bits/stdc++.h>
using namespace std;
// main function
int main()
{
// variables
int num;
cout<<"enter an integer (0 to stop):";
// read the integer
cin>>num;
// read integer until user enter 0
while(num)
{
cout<<"enter an integer (0 to stop):";
cin>>num;
}
//if input is 0 then print "exit"
cout<<"exit"<<endl;
return 0;
}
Explanation:
Declare a variable "num" to read input from user.Read input integer until
user enter 0 as input.When user enter 0 then program will print "exit" and
end the program.
Output:
enter an integer (0 to stop):2
enter an integer (0 to stop):-2
enter an integer (0 to stop):4
enter an integer (0 to stop):10
enter an integer (0 to stop):123
enter an integer (0 to stop): 0
exit
. Convert 2AF from hexadecimal to binary. Show your work.
Answer:
The answer is 2AF₁₆ = 687₁₀ = 1010101111₂.
Explanation:
To convert from hexadecimal base system to binary base system, first you can do an intermediate conversion from hexadecimal to decimal using this formula:
[tex]N = x_1 * 16^0 + x_2 * 16^1 + x_3 * 16^2 + x_4 * 16^3+ ... + x_n 16^n^-^1[/tex]
, where position of the x₁ is the rightmost digit of the number and:
A = 10.B = 11.C = 12.D = 13.E = 14.F = 15.2AF₁₆ = 2*16²+A*16¹+F*16⁰ = 512 + 160 + 15 = 687₁₀
Now, transform from decimal to binary the number 687. Divide the number repeatedly by 2, keeping track of each remainder, until we get a quotient that is equal to 0:
687 ÷ 2 = 343 + 1;343 ÷ 2 = 171 + 1;171 ÷ 2 = 85 + 1;85 ÷ 2 = 42 + 1;42 ÷ 2 = 21 + 0;21 ÷ 2 = 10 + 1;10 ÷ 2 = 5 + 0;5 ÷ 2 = 2 + 1;2 ÷ 2 = 1 + 0;1 ÷ 2 = 0 + 1;Now, construct the integer part base 2 representation, by taking the remainders starting from the bottom of the list:
687₁₀ = 1010101111₂
A remediation liaison makes sure all personnel are aware of and comply with an organization's policies.
True
False
Answer:
False.
Explanation:
I believe this should be the work of a compliance liaison. Assume you have opened up an organization that is growing each day. You have employees who are required to be compliant with all the security standards and policies. Hiring a compliance liaison will ensure that these compliances are being carried out. Each department in an organization should work with a compliance liaison to ensure that its employees understand and comply fully with all security policies.
We all know everything there is to know about the Fibonacci sequence, right?
Answer:
Yes.
Explanation:
Fibonacci Sequence is the series of numbers which are the sum of previous two number in the series.Two numbers are predefined in the Fibonacci sequence.The first number in the series is always 0 and the second number in the series is always 1.
We need atleast two numbers to start fibonacci sequence so that the series can be generated.
Which of the following views hides the ribbon and shows text on the screen in an easy-to-read format?: *
a. Full Screen Reading
b. Web Layout
c. Print Layout
d. Draft
Answer: a)Full Screen Reading
Explanation: Full screen reading is the option present for the reading the text format easily on the system screen .This mode works by minimizing the extra data elements like menus of the screen. The full screen reading mode is usually preferred while there is the requirement of only reading without any editing.
Other options are incorrect because web layout is the layout of the web page, print layout is the tab for printing the layout of page options and draft is the written document which can be edited .Thus , the correct option is option(a)
Answer:
1. toolbar
2. reading
3. double-click
Explanation:
Why do small incremental code changes in software have to do with testing?
Answer:
It is method where the product is designed, implemented and tested incrementally until the product is finished.
Explanation:
Small incremental codes are used to find the errors or bugs in the program coding or in the development of software. The whole process of incremental codes in software testing is categorized in smaller chunks, and the process is executed in steps of design, requirement, and implementation. If an error occurs in each step of the testing phase, it will be detected. This process is economical and easy to use due to smaller chunks.
Write a program that continues to read positive integer values until user enters a negative value. The program should print average of entered values, maximum value and minimum value
Answer:
// here is code in C++.
#include <bits/stdc++.h>
using namespace std;
int main()
{
// variable
int n;
int mi=INT_MAX;
int mx=INT_MIN;
double avg;
int count=0;
double sum=0;
cout<<"enter a positive integer(Negative number to stop):";
// read the input first time
cin>>n;
// read the input until user enter a negative number
while(n>=0)
{
// calculate minimum
if(n<mi)
mi=n;
// calculate maximum
if(n>mx)
mx=n;
// count of entered numbers
count++;
// total sum of all number
sum=sum+n;
cout<<"enter a positive integer(Negative number to stop):";
// read the input again
cin>>n;
}
// calculate the average
avg=sum/count;
// print the average
cout<<"average of "<<count<<" number is:"<<avg<<endl;
// print the maximum
cout<<"maximum of all number is:"<<mx<<endl;
// print the minimum
cout<<"minimum of all number is:"<<mi<<endl;
return 0;
}
Explanation:
Declare and initialize "mi" with maximum integer value.Similarly "mx" with minimum integer value.Read user input until user enter a negative number.Add all the number to variable "sum" and keep count of positive number entered with "count".When user enter a negative number then it will stop taking input and calculate average of all number by dividing sum with count. Also it will check for each and find the maximum and minimum among the all input.
Output:
enter a positive integer(Negative number to stop):23
enter a positive integer(Negative number to stop):10
enter a positive integer(Negative number to stop):34
enter a positive integer(Negative number to stop):22
enter a positive integer(Negative number to stop):5
enter a positive integer(Negative number to stop):-2
average of 5 number is:18.8
maximum of all number is:34
minimum of all number is:5
The method with the declaration public static char procedure(double d) has a method type of . a) public b) static c) char d) double
Answer:
Option(c) is the correct answer for the given question .
Explanation:
Public is the access modifier not a method type so option(a) option is wrong.
Static is not return type static keyword before the method of procedure means it is directly accessed with the help of class name so option(b) is also wrong.
double is the datatype of variable d it is not the method type so option(d) is also wrong
So char is the method type of the method procedure.
Therefore option (c) is the correct answer.
Which command compiles the Java source code file Welcome.java?
cd Welcome.java
javac Welcome.java
java Welcome.java
compile Welcome.java
Answer:
javac Welcome.java
Explanation:
In order to the file to compile with the default compiler in the JDK, the instruction must be of the form:
javac filename
(Note: the filename with the .java extension)
. The first step in devising security services and mechanisms is to develop a security policy True False
Answer: True
Explanation: For the creation of the security services and function the first step is having a policy regarding the security measure that is to be taken.Security policy consist of the procedures and function that should be implement in the system as a plan.
It monitors the flow,accessing of external component ,data assessment etc fro the protection.After the policies are made then the implementation take place. The most common deployment of this policy is in information technology(IT)sector .Thus, the given statement is true..
. Which of the following is the command for backing up a database from the command line?
(a) mysqlslap
(b) mysqlshow
(c) mysql --backup
(d) mysqldump
Answer:d) mysqldump
Explanation: The backing up of the database is the function that is operated by the MYSQL. The database that is to be backed up is known as the dump data ,which contains the data files in the text format."mysqldump" command is the SQL command that is given for the extraction of the single database as well as multiple databases.
This command works by recreating the data files by copying it in a quick manner.Other options are incorrect because those commands don not work in MYSQL for creating a backup of database.Thus, the correct option is option(d).
What is the purpose of a destructor? (g) What is the purpose of an accessor?
Answer:
Destructor:-To free the resources when lifetime of an object ends.
Accessor:-To access private properties of the class.
Explanation:
The purpose of a destructor is to free the resources of the object that it has acquired during it's lifetime. A destructor is called once in the lifetime of the object that is also when the ifetime of the object ends.
The purpose of the accessors is to access private properties of the class.Accessor cannot change the value of the private members.They are also called getters.
controls to keep password sniffing attacks from compromising computer systems include which of the following?
a.Static and recurring passwords
b.Encryption and recurring passwords
c.One-time passwords and encryption
d.Static and one-time passwords
Answer:
the answer is b your welcome