Answer:
Microsoft Windows
Explanation:
Open Source Software is a software which is accessible to the public. we can modify or extend the code .In the given options Microsoft windows is not an open source operating system. User don't have access to source code where as Linux is an open source software where you can't limit to the functionality which they provided. you can control and extend the source code which they given for this OS
Which of the following statements is/are true? (Points : 5) A. A default constructor is automatically created for you if you do not define one.
B. A static method of a class can access non-static members of the class directly.
C. An important consideration when designing a class is identifying the audience, or users, of the class.
None of the above
Only A and C
Answer: Only A and C
Explanation: Default constructor is a constructor that has parameters with the values that are default or has no arguments/parameter present. Default constructor is not declared in the class rather it gets generated by itself when not defined.
Class is defined with data members, functions, objects etc are considered as per the requirement given by the user .It is the user defined concept.
Statement (B) is incorrect because static method is used for accessing the static members of the particular class and manipulate the value of it.
Thus, only statement (A) and (C) are correct.
Write a C program that prints the numbers from 1 to 100, but substitutes the word "fizz" if the number is evenly divisble by 3, and "buzz" if the number is divisible by 5, and if divisible by both prints "fizz buzz" like this: 13 1 14 2 fizz 4 buzz fizz 7 fizz buzz 16 17 fizz 8 fizz buzz 19 buzz ... 11 fizz and so on
Answer:
// here is code in C.
#include <stdio.h>
int main(void) {
int num;
// loop run 100 times
for(num=1;num<=100;num++)
{
//check divisibility by 3 and 5
if(num%15==0)
{
printf("fizz buzz ");
}
// check divisibility by 5 only
else if(num%5==0)
{
printf("buzz ");
}
// check divisibility by 3 only
else if(num%3==0)
{
printf("fizz ");
}
else{
printf("%d ",num);
}
}
return 0;
}
Explanation:
Run a for loop from 1 to 100. Check the divisibility of number by 15, if it is divisible print "fizz buzz", if it is not then Check the divisibility by 5 only.if it returns true then print "buzz". if not then check for 3 only,if returns true, print "fizz". else print the number only.
Output:
1 2 fizz 4 buzz fizz ........buzz fizz 97 98 fizz buzz
The first step in building a sequence diagram is to _____. (Points : 6) analyze the use case
identify which objects will participate
set the lifeline for each object
add the focus of control to each object's lifeline
Answer: Set the lifeline of each object
Explanation:
The sequence diagram is the efficient way that use in the system requirement document for the system design.
The sequence diagram is useful in many system that shows the interaction of the logic between the each object in the system.
The first step for building the sequence diagram is that set the lifeline of the each object in the system and it allow the main specification in the run time scenarios in the graphical manner. Therefore, it enhance the performance of the system.
Write a program that will ask the user to enter personal information and then will display it back to the user.
First, the program will ask the user to enter name. Then it will ask the user to enter address. Then it will ask the user to enter phone number. Then it will ask the user to enter email. At the end, it will display the user
Final answer:
A simple Python program prompts the user to enter personal information such as name, address, phone number, and email, then displays it back. It's essential to handle personal data responsibly and to check privacy policies in real applications.
Explanation:
The question is asking for a simple program that collects and displays personal information. Here is an example of how such a program can be written in Python:
# Ask for personal information
name = input('Please enter your name: ')
address = input('Please enter your address: ')
phone_number = input('Please enter your phone number: ')
email = input('Please enter your email: ')
# Display the information back to the user
print('\nHere is the information you entered:')
print('Name:', name)
print('Address:', address)
print('Phone Number:', phone_number)
print('Email:', email)
This program will prompt the user to enter their name, address, phone number, and email. It will then display this information back to the user. Remember to handle personal information responsibly and refer to privacy policies when handling such data in real applications.
how to import any csv from internet in phyton 3 and R ?
Answer:
Jgthj
Explanation:
T to it t urd864rb. I5f. 8rfb 75gj
Write a program to calculate the number of seconds since midnight. For example, suppose the time is 1:02:05 AM. Since there are 3600 seconds per hour and 60 seconds per minutes, it has been 3725 seconds since midnight (3600 * 1 + 2 * 60 + 5 = 3725). The program asks the user to enter 4 pieces of information: hour, minute, second, and AM/PM. The program will calculate and display the number of seconds since midnight. [Hint: be very careful when the hour is 12].
Answer:
// here is code in c++.
#include <bits/stdc++.h>
using namespace std;
int main()
{
// variables
int hour,min,sec,tot_sec;
string str,s="AM";
cout<<"enter number of hours:";
// read hour
cin>>hour;
cout<<"enter number of minutes:";
// read minute
cin>>min;
cout<<"enter number of seconds:";
// read seconds
cin>>sec;
cout<<"Enter AM or PM:";
// read AM or PM
cin>>str;
if((str.compare(s) == 0 )&& hour==12)
{
hour=0;
}
// calculate total seconds
tot_sec=hour*3600+min*60+sec;
// print the output
cout<<"total seconds since midnight is : "<<tot_sec<<endl;
return 0;
}
Explanation:
Read the value of hour, minute, second and string "AM" or "PM" from user.
Then if string is equal to "AM" then make hour=0.Then multiply hour with
3600, minute with 60 and add them with second.It will give the total seconds
from midnight.
Output:
enter number of hours:12
enter number of minutes:46
enter number of seconds:23
Enter AM or PM:AM
total seconds since midnight is: 2783
Final answer:
The program provided takes user input for hour, minute, second, and period (AM/PM) and calculates the total number of seconds since midnight. Special attention is given to the hour input to correctly adjust for 12-hour time format nuances, ensuring accurate conversion and calculation.
Explanation:
Calculating the number of seconds since midnight involves several steps of time conversion and careful consideration of whether the time is AM or PM, especially in the instance of 12 o'clock. Below is a simple program in Python which prompts the user for the required information and calculates the number of seconds since midnight:
Python Program:
def calculate_seconds(hour, minute, second, period):
if hour == 12:
hour = 0
if period.lower() == 'pm':
hour += 12
total_seconds = (hour * 3600) + (minute * 60) + second
return total_seconds
# User input
hour = int(input('Enter the hour: '))
minute = int(input('Enter the minutes: '))
second = int(input('Enter the seconds: '))
period = input('Enter AM or PM: ')
# Calculation
total_seconds_since_midnight = calculate_seconds(hour, minute, second, period)
print(f'It has been {total_seconds_since_midnight} seconds since midnight.')
This program will correctly convert the given time to the total seconds since midnight using the entered hour, minute, and second values, along with the period of the day.
What is ‘Black-Box’ testing?
Answer:
Black-box testing is the technique which is basically use to reduce the number of the possible cases of the test and also maintain the test coverage. This type of testing is used in the functional and the non functional requirement of the system.
It is type of testing that majorly focus on the functional requirement. There are many types of black box testing that are:
BVA (Boundary value analysis)Error guessingDecision table testing
. Within data mining, what it it’s robustness?
Answer:
Data mining is the extraction/mining of the required/ actual data from the raw data .Rest of the data that is not required is eliminated in this process.It is used in the many field such as research, scientific, etc.
Robustness in the data mining field is for defining the strong nature of the data .This feature is responsible for stability of the data even at the occurrence of the error.The resistance shown by the data towards the problem makes the data robust .
In your opinion, what are the Pros and Cons of employers using Video Surveillance?
Answer: Video surveillance is the digital system used in the organization for the capturing of the video and storing it for monitoring .It is used for the security purpose of the business. The pros and cons of this system is mentioned as follows:-
Pros:
Providing security in business field Decrements in the crime rateProvides 24x7 monitoring and surveillanceServing real -time informationCons:
Costly investmentNeeds more devices for installation in large organizationsCreated privacy concernsOverloading of data storage in the form video can happen
Final answer:
Pros of employers using video surveillance include increased security and monitoring productivity. Cons include invasion of privacy and the potential for misuse by employers.
Explanation:
Pros:
Increased security: Video surveillance can help deter theft, vandalism, and other crimes in the workplace.Monitoring productivity: Employers can use video surveillance to ensure employees are working efficiently and following company guidelines.Evidence in legal matters: Video footage can serve as evidence in workplace disputes, accidents, or criminal activities.Cons:
Invasion of privacy: Video surveillance can infringe on employees' privacy rights and create a sense of constant monitoring.Potential for misuse: Employers may abuse video surveillance by using it for purposes other than security and surveillance.Employee morale: Constant video surveillance may create a negative work environment and lower employee morale.Explain what happens if you try to open a file for reading that does not exist.
Answer:
Exception is thrown and the file is created with 0 length.
Explanation:
While opening a file there is an error occur which shows the file does not exist that means an exception is thrown.
And this error can be occur when the size of the file is very very low means the file is a size of 0 length. So to avoid this error we have to exceed its length from the zero length.
Write a program that asks the user to enter five different, integer numbers. The program then reports the largest number and the smallest number.
Use the if statement, but no loops.
Answer:
// here is code in C++.
#include <bits/stdc++.h>
using namespace std;
// main function
int main()
{
// variables
int minn=INT_MAX;
int maxx=INT_MIN;
int n1,n2,n3,n4,n5;
cout<<"enter five Numbers:";
//read 5 Numbers
cin>>n1>>n2>>n3>>n4>>n5;
// find maximum
if(n1>maxx)
maxx=n1;
if(n2>maxx)
maxx=n2;
if(n3>maxx)
maxx=n3;
if(n4>maxx)
maxx=n4;
if(n5>maxx)
maxx=n5;
// find minimum
if(n1<minn)
minn=n1;
if(n2<minn)
minn=n2;
if(n3<minn)
minn=n3;
if(n4<minn)
minn=n4;
if(n5<minn)
minn=n5;
// print maximum and minimum
cout<<"maximum of five numbers is: "<<maxx<<endl;
cout<<"minimum of five numbers is: "<<minn<<endl;
return 0;
}
Explanation:
Declare two variables "minn" & "maxx" and initialize them with INT_MAX and INT_MIN respectively.Then read the five number from user and compare it with "minn" & "maxx" ,if input is greater than "maxx" then update "maxx" or if input is less than "minn" then update the "minn". After all the inputs, "minn" will have smallest and "maxx" will have largest value.
enter five Numbers:5 78 43 55 12
maximum of five numbers is: 78
minimum of five numbers is: 5
What is TCP/IP's Transport layer's primary duty?
Answer:
The TCP/IP is the transmission control protocol and internet protocol and in the TCP/IP model the transport layer is the second layer.
The primary responsibility of this layer is that it is basically used to deliver messages to the host and that is why it is known as end to end layer.
It basically provide the point to point connection between the destination to server host for delivering the various types of the services efficiently and reliably.
In the TCP/IP model the transport layer are basically responsible for transferring the data or service error free between the server to destination host.
. You have implemented file permissions on a file so that unauthorized persons cannot modify the file. Which of the following security goals has been fulfilled? A. Accountability B. Privacy C. Integrity D. Accountability
Answer: C)Integrity
Explanation: Integrity is the function that maintains the completeness and originality of information.It assures that the data is not manipulated or modified through any unauthorized access.This helps in keeping the system and data accurate.
Other options are incorrect because accountability is referred as the liability and privacy is only selected user can access the data but they can modify it.Thus, the correct option is option(c) .
What is a foreign key and how does it provide referential integrity?
Answer:
By definition a foreign key of table A is a primary key of another table B, thereby establishing a link between them.
To provide referential integrity you can use these referential actions:
Cascade: If rows in table B are deleted, the matching foreign key columns in table A are deleted. Set Null: If rows in table B are deleted, the matching foreign key columns in table A are set to null. Set Default: If rows in table B are deleted, the matching foreign key columns in table A are set with the default value of the column. Restrict: A value in table B cannot be deleted or updated while as it is referred to by a foreign key in table A._________ is used in planning situations that involve much uncertainty, like that of IT in general and e-commerce in particular.
a. Key performance indicators (KPIs)
b. Scenario planning
c. Critical success factors (CSFs)
d. Balanced scorecard
Answer:b)Scenario planning
Explanation: Scenario planning is the strategy that is made for the generation of long term plan in an organization. It is also known as the scenario analysis . This is flexible technique in which helps the well structured and well managed future of organizations.
This tool considers the uncertainty and uncontrollable events that might happen in future and thus , these situation are analysed and acknowledged.
Other options are incorrect because Key performance indicator are for providing the key factor about the performance of organization, critical success factor are for achieving positive outcome and balanced scorecard is type of management plan framework.Thus the correct option is option(b).
Convert hexadecimal number 1AF2 to a decimal number.
Answer:
6898
Explanation:
Given that 1AF2 is a hexadecimal number.
We have in hexadecimal, the digits are 0,1,2,3...9, A,B,C,D,E,F for the 16 digits used.
Using the above we say in the given number, we have
2 in units column
F in 16 column
A in 16 square column
and 1 in 16 cube column
Place value[tex]= 2(1) +15(16)+10(16^2)+1(16^3)\\= 2+240+2560+4096\\=6898[/tex]
Hence 1AF2 = 6898 in decimal
Why is String final in Java?
Answer:
string objects are cached in string pool.
Explanation:
Strings in Java are immutable or final because the string objects are cached in String Pool.As we know multiple clients share the string literals so there exists a risk of one client's action affecting all other clients.
For ex:-The value of string is "Roast" and client changed it to "ROAST" so all other clients will see ROAST instead of Roast.
Which one is the fastest? (Points : 4) TTL
CMOS
ECL
They are the same
Answer: ECL
Explanation:
ECL is basically stand for the emitter coupled logic and it is the high speed integrated logic circuit. In this ECL logic circuit, the transistor does not enter in the saturation mode.
In the emitter coupled logic, the output resistance are low and the input emitter impedance are high so, the state of the transistor are get changes quickly. Hence, it is fastest device as compared to all other options.
Therefore, ECL is the correct option.
List at least three benefits of automated testing?
Answer:
Always available to run: You can run the tests 24/7, when you are at work, when you leave the office or if you working remote, you can run the test. They can be run virtually unattended, leaving the results to be monitored towards the end of the process.
Fewer human resources: You can reduce the people advocated on testing, you would need a QA automation to write your scripts to automate your tests, instead of people doing manual tests. In addition, once automated, the test library execution is faster and runs longer than manual testing.
Reusability and reliability: The scripts are reusable, a script could be used hundreds of times before need changes. It allows you to test exactly the same, without forgetting any steps this is why is more reliable and way quicker than manual test where people may cause.
____ coordinates activities related to the Internet’s naming system, such as IP address allocation and domain name management. National Center for Supercomputing Applications (NCSA) Web Consortium (W3C) ICANN (Internet Corporation for Assigned Names and Numbers) Internet Society (ISOC)
Answer: ICANN (Internet Corporation for Assigned Names and Numbers)
Explanation: ICANN (Internet Corporation for Assigned Names and Numbers) is the a US base government organization which runs on the non-profit scheme. The function of the ICANN is to maintain stability of internet operation and function,process based on consensus ,managing the domain name, naming internet components etc.
Other options are incorrect because National Center for Supercomputing Applications (NCSA) is for supporting and providing powerful computer, Web Consortium (W3C) is for development of standard of web and Internet Society (ISOC) works for internet based standard for development.
A __________ is an information system that produces all kind of reports and interprets information so it can be used by concerned people to make decisions.
DSS (Decision Support System)
MIS (Management Information system
EIS (Expert Information System)
TPS (Transaction Processing System)
2400
Answer: Decision support system (DSS)
Explanation:
Decision support system is the process in which the information model basically support the managers in the process of the decision making.
It is an information system and produces various reports and also interprets the data and information so that it help to make decisions.
The decision support system (DSS) is basically carried out by the management by reviewing all kinds of the report and then generate necessary data or information.
On the other hand, all the other options are incorrect as they are not related to the decision making process. Therefore, DSS is the correct option.
According to the loyalty effect, a five percent reduction in customer attrition can improve profits by as much as __________ percent.
a. 5
b. 10
c. 15
d. 20
Answer:
d.20
Explanation:
A reduction of five percent in customer attrition can improve improve the profits of the company by as much as 20 percent.This is according to loyalty effect.
The Loyalty Effect is a book written by Fredrick Reichheld it is based on customer retention.It is one of the best books on customer retention.
Give two separate print statements: one will print your name, the other will print your major. Ensure that both will print on the same line to the screen
Answer:
// here is code in java.
// import package
import java.util.*;
// class definition
class Main
{
// main method of the class
public static void main (String[] args) throws java.lang.Exception
{
try{
// print the name
System.out.print("my name is Sam. ");
// print the major
System.out.print("my major is CS.");
}catch(Exception ex){
return;}
}
}
Explanation:
In java, System.out.print() will print the statement but didn't go to the next line.If there is another System.out.print(), then it will also print into the same line.So here first the System.out.print() will print the name and second will print the major in the same line.
Output:
my name is Sam. my major is CS.
Which of the following is NOT a good idea to do after you change the root password?
(a) Restart the MySQL Service.
(b) Write down the new password in a safe place.
(c) Keep the change password file on the server in case you need to change the password again.
Answer:
C) Keep the change password file on the server in case you need to change the password again
Another ball dropped from a tower A ball is again dropped from a tower of height h with initial velocity zero. Write a program that asks the user to enter the height in meters of the tower and then calculates and prints the time the ball takes until it hits the ground, ignoring air resistance. Use your program to calculate the time for a ball dropped from a 100 m high tower
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 character referencing and why is it used?
Answer: Character reference is the tool usually followed in the business world.It is defined as the recommendation that is provided by organization employee that has a relation with the candidate(individual) outside of the work. This also known as the personal reference. The candidate can be friend family or any other known person whose reference is being given.
This is used in the business field for revealing about the personality and character of the candidate apart from the skills and working abilities. It also helps in the hiring of the candidate easily when the description is good in the character reference.
What is the association rule of data mining?
Answer:
Association rules are usually referred as the if-then statements which help in order to show probability of association and relationships in between data items that are embedded within large data sets in several kinds of databases. Association rule mining also tends to have a several number of applications and thus is widely used in order to uncover sales relation in transactional data.
Explain what occurs when you synchronize computer and mobile devices.
Answer: The synchronization of the mobile and computer devices is termed as the merging of the information of the device with the other computer device.Synchronization action takes through the "sync" command .
The synchronization helps in updating the information or data that is present in both the devices .It also sends and receive the files and information from reach other through transferring activity.The act helps in keeping the same updated information in both the system.
Write a function called reverse() with this prototype:
void reverse(char dest[], char source[], int size);
Your function should copy all the elementsin the array source into the array dest, except in reverse order. The number of elements in the source array is give in the parameter size. Use a for loop to do the copying. Assume that dest is large enough to hold all of the elements. Please be thorough with commenting.
Answer:
void reverse(char dest[], char source[], int size)
{
for(int i=0;i<size;i++)//using for loop.
{
dest[i]=source[i];//assigning each element of source array to dest array.
}
int s=0,e=size-1;//initializing two elements s with 0 and e with size -1.
while(s<e){
char t=des[s]; //SWAPPING
dest[s]=dest[e]; //SWAPPING
dest[e]=t; //SWAPPING
s++;
e--;
}
}
Explanation:
I have used while loop to reverse the array.I have initialize two integer variables s and e with 0 and size-1.Looping until s becomes greater than e.
It will work as follows:
first s=0 and e=0.
dest[0] will be swapped with dest[size-1]
then s=1 and e=size-2.
then des[1] will be swapped with dest[size-2]
and it will keep on going till s is less than e.
What is pros and cons of Cleanroom Software Engineering Process?
Answer and Explanation:
Pros of cleanroom software
This helps in confirming the plan detail with the assistance of mathematically based evidence of rightness.This uses incremental development processes.This uses incremental development processes. The realistic expectation is considered as less than 5 failures per KLOC on the first program execution in the project.There are short advancement cycles and longer item life.Cons of cleanroom software
This exceptionally relies upon the statistical utilization of testing for revealing the high impact mistakes.The software is also not compiled or executed during the verification process hence it would become difficult to find the errors.