Consider a set A = {a1, . . . , an} and a collection B1, B2, . . . , Bm of subsets of A (i.e., Bi ⊆ A for each i). We say that a set H ⊆ A is a hitting set for the collection B1, B2, . . . , Bm if H contains at least one element from each Bi – that is, if H ∩ Bi is not empty for each i (so H "hits" all the sets of Bi). We define the Hitting Set Problem as follows. We are given a set A = {a1, . . . , an}, a collection B1, B2, . . . , Bm of subsets of A, and an non-negative integer k. We are asked: is there a hitting set H ⊆ A for B1, B2, . . . , Bm so that the size of H is at most k? Prove that the Hitting Set problem is NP-complete

Answer:

#include <iostream>

using namespace std;

void PrintPopcornTime(int bagOunces) {

   if(bagOunces < 2)

       cout << "Too small" << endl;

   else if(bagOunces > 10)

       cout << "Too large" << endl;

   else

       cout << 6 * bagOunces <<" seconds" << endl;

}

int main()

{

   int userOunces;

   cin >> userOunces;

   PrintPopcornTime(userOunces);

   return 0;

}

Explanation:

Inside the function PrintPopcornTime, check the parameter bagOunces using if structure. Depending on the value of bagOunces, print the required information.

Inside the main, ask the user for the userOunces. Call the PrintPopcornTime function with the userOunces.

Answer:

Assuming you are using the AWS CLI to upload data to s3, there are two optimizations to increase the speed:

1) Parallel chunked uploading, which uploads your (large) file in chunks in parallel.

2) use Amazon S3 Transfer Acceleration

This will upload your file to a nearby CloudFront instance

You can enable this in your CLI configuration file, named config in the .aws folder. Add the following lines:

s3 =

max_concurrent_requests = 20

max_queue_size = 10000

multipart_threshold = 64MB

multipart_chunksize = 16MB

max_bandwidth = 100MB/s

use_accelerate_endpoint = true

addressing_style = path

Answer:

- Peripheral devices

Explanation:

Peripheral devices are defined as computer devices which are not the element of the essential/basic computer function. These devices can be internal as well as external and are primarily connected to the computer for entering or getting information from the computer. For example, the keyboards or mouse functions to enter data into the computer for processing and receiving information while the output devices like speakers, projectors, printers, etc. are used to get the information out of the computer.

Answer:

Word Processor

Explanation:

it is called word processor

Answer:

Here is the JAVA program:    

import java.util.Scanner;

public class Operations{      

  public static void main(String[] args) {      

    Scanner input= new Scanner(System.in);

      float first,second;

      System.out.println("Enter first number:");

       first = input.nextFloat();

       System.out.println("Enter second number:");

       second = input.nextFloat();

       System.out.println("Enter 1 for Addition, 2 for Subtraction 3 for Multiplication, 4 for Division and 5 for Average:");

       int choice;

       choice = input.nextInt();

       switch (choice){

       case 1: //calls add method to perform addition

           System.out.println("Addition result = " + add(first,second));

           break;

       case 2: //calls sub method to perform subtraction

           System.out.println("Subtraction result = " + sub(first,second));

           break;      

       case 3: //calls mul method to perform multiplication

           System.out.println("Multiplication result = " +mul(first,second));

           break;

       case 4: //calls div method to perform division

           System.out.println("Division result = " +div(first,second));

           break;

       case 5: //calls average method to compute average

           System.out.println("Average = " +average(first,second));

           break;

       default: //if user enters anything other than the provided options

               System.out.println("Invalid Option"); }}

   public static float add(float first, float second)    {

       float result = first + second;

       if(result<0)

       {System.out.println("Oops option 1 is returning a negative number that is: ");      }        

       return result;    }

   public static float sub(float first, float second)    {

       float result = first - second;

       if(result<0){System.out.println("Oops option 2 is returning negative number that is: ");}        

       return result;    }

   public static float mul(float first, float second)    {

       float result = first*second;

        if(result<0)

        {System.out.println("Oops option 3 is returning negative number that is: ");}        

       return result;    }

   public static float div(float first, float second){

       if(second==0)

       {System.out.println("Division by 0");}

       float result = first/second;

        if(result<0){System.out.println("Oops option 4 is returning negative number that is: ");}      

       return result;    }    

   public static float average (float first,float second)    {

       Scanner inp= new Scanner(System.in);

       float first2,second2;

        System.out.println("Enter two more numbers:");

        System.out.println("Enter first number:");

       first2 = inp.nextInt();

      System.out.println("Enter second number:");

       second2 = inp.nextInt();

       float result;

       float sum = first+second+first2+second2;

       result = sum/4;

        if(result<0)

        {System.out.println("Oops option 5 is returning negative number that is: ");}        

       return result;  }}

Explanation:

The above program first prompts the user to enter two numbers. Here the data type of two number is float in order to accept floating numbers. The switch statement contains cases which execute according to the choice of user. The choice available to user is: 1,2,3,4 and 5

If the user selects 1 then the case 1 executes which calls the method add. The method add takes two numbers as parameters, adds the two numbers and returns the result of the addition. This result is displayed on output screen. However if the result of addition is a negative number then the message: "Oops option 1 is returning the negative number that is:" is displayed on the screen along with the negative answer of that addition.

If the user selects 2 then the case 2 executes which calls the method sub. The method works same as add but instead of addition, sub method takes two numbers as parameters, subtracts them and returns the result of the subtraction.

If the user selects 3 then the case 3 executes which calls the method mul. The method mul takes two numbers as parameters, multiplies them and returns the result of the multiplication.

If the user selects 4 then the case 4 executes which calls the method div. The method div takes two numbers as parameters and checks if the denominator i.e. second number is 0. If its 0 then Division by 0 message is displayed along with result i.e. infinity. If second number is not 0 then method divides the numbers and returns the result of the division.

If the user selects 5 then the case 5 executes which calls the method average. The average method then  asks the user to enter two more numbers first2 and second2 and takes the sum of all four numbers i.e. first, second, first2 and second2. Then the result of sum is divided by 4 to compute average. The method returns the average of these four numbers.

Answer:

Two bits would be not enough.

Four bits would be enough.

Explanation:

With two bits, only 4 unique binary numbers are available. They are:

00

01

10

11

And since there are 5 lowercase vowel letters and 5 uppercase vowel letters in the English language, making a total of 10 vowel letters, two bits will only cater for 4 of the 10 letters and as such will not be enough.

With three bits, only 8 unique binary numbers are available. They are:

000

001

010

011

100

101

110

111

Three bits will therefore only cater for 8 of the 10 letters and as such will not be enough.

With four bits however, there are 16 binary numbers available. They are:

0000

0001

0010

0011

0100

0101

0110

0111

1000

1001

1010

1011

1100

1101

1110

1111

Four bits are more than enough to cater for all the 10 vowel letters in the English language.

PS: The number of unique binary numbers that can be found in n bits is given by;

2ⁿ

So;

If we have 3 bits, number of unique binary numbers will be

2³ = 8

If we have 6 bits, number of unique binary numbers will be

2⁶ = 64

Using bits concepts, it is found that two bits is not enough to assign a binary number to each vowel in the English language, as two bits can represent at most 4 symbols, and there are 5 vowels.

------------------------

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The available options are:

A. Servers in the test environment.

B. Domain controller and other infrastructure servers.

3. Desktops that have previously been attacked.

4. Desktops are used by upper-level management.

Answer:

Domain controller and other infrastructure servers

Explanation:

A domain controller is a critical machine or server in a network operation on Microsoft Servers. It serves as the authorization point in which security authentication can be granted, such as managing users' account data, security policy, and all other vital information well arranged and secured.

Hence, considering the available options, the right answer is "Domain controller and other infrastructure servers."

Answer:

37 percent

hope it helps u

Answer: D.) Discretionary access control

Explanation: Access control modes provides networks with a security system used for moderating, risk prevention and privacy maintainance of data and computing systems. Several access control modes exists depending on the degree of control required. In the discretionary access control approach, users are afforded the freedom and flexibility of making choices regarding permissions granted to programs. Hence, in this mode, permission are user-defined and as such sets privileges based on how the user deems fit.

Answer:

Wearables

Explanation:

Wearables is a term that describes some certain forms of electronic devices that are embedded in accessories, clothing, or the user's body and connect to the internet of things to process and store data. For example fitness tracker, body-mounted sensor, etc. It is sometimes referred to as Wearable Technology

Hence, the correct answer to this question is simply termed  WEARABLES.

Answer:

By using digital certificates.

Explanation: Digital certificate are used for the following:

1) Digital certificates are used in public key cryptography functions; they are most commonly used for initializing secure SSL connections between web browsers and web servers.

2) Digital certificates can also be used for sharing keys to be used for public key encryption and authentication of digital signatures.

Answer:

B

Explanation:

When the first time you save a document, the ''Save As screen'' will appear. Hence, the option (b) is correct.

Given that,

To find the screen appears the first time you save a document.

Now, When you save a document for the first time, the "Save As" screen typically appears, allowing you to choose the file name, location, and file format for the document.

This gives you the option to specify where and how the document should be saved on your device.

So, the correct option is,

b. Save As screen

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Answer:

(c) A list of words

Explanation:

First let's format the code properly

fin = open('words.txt')

for line in fin:

     word = line.strip()

     print(word)

Second, let's explain each line of the code

Line 1:

The open() function is a built-in function that takes in, as argument, the name of a file, and returns a file object that can be used to read the file.

In this case, the name of the file is words.txt. Therefore, the variable fin is a file object which contains the content of the file - words.txt

Line 2:

The for loop is used to read in each line of the content of the file object (fin).

Line 3:

Each line of the contents is stripped to remove any trailing and leading white spaces by calling on the strip() function. The result of the strip is stored in the variable word.

Line 4:

The content of word at each of the cycles of the loop is printed to the console.

Therefore,  the overall output of the program is a list of words where each word represents a line in the target file (words.txt)

The program is an illustration of string manipulations.

word represents (e) A string with no newline

The program is given as:

fin = open('words.txt')

for line in fin:

        word = line.strip()

        print(word)

On line 3 of the program, the variable word contains the value of the string line, after the new lines and trailing spaces have been removed from the variable line.

This means that: variable word is a string with no newline

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Answer:

O( n ) of the 100 element array, where "n" is the item location index.

Explanation:

From the meaning of the word "sequential", the definition of this algorithm should be defined. Sequential donotes a continuously increasing value or event, like numbers, increasing by one in an arithmetic progression.

A list in programming is a mutable data structure that holds data in indexed locations, which can be accessed linearly or randomly. To sequentially access a location in a list, the algorithm starts from the first item and searches to the required indexed location of the search, the big-O notation is O( n ), where n is the index location of the item searched.

Answer:

Electronic conferencing

Explanation:

Electronic conferencing is a form of a computer-based system that allows people to communicate simultaneously from different locations, with the aid of the Internet, which can be done through telephones, emails, or video chats. It is a commonly known Virtual Meeting.

Hence, the right answer, based on the definition or description given in the question is ELECTRONIC CONFERENCING

Answer:

False

Explanation:

Namecoin is a type of crypto currency which was originally pronged from Bitcoin software. It is coded in the fashion of Bitcoin with the same algorithm as well. Hence it is not a blockchain technology that is used to implement decentralized version of Routing Banking System. Namecoin can store data within its own blockchain transaction database.

Answer:

c. 20

Explanation:

The program works as following:

x is initialized to 10

y is initialized to 30

if (x < 0) statement checks if the value of x is less than 0. This condition evaluates to false because x=10 so 10 is greater than 0. So the statement inside the body of this if condition will not execute. Hence the program control moves to the else if part:

else if (x < 10) statement checks if the value of x is less than 10. This condition evaluates to false because x=10 so x is equal to 10 and not less than 10. So the program control moves to the else part and the statement in else part executes:

else {

y = 20;

}

This statement in else part assigns the value 20 to y

Then the program control moves to the following statement:

cout << y;

This statement prints the value of y. As the else part assigns 20 to y so the output is:

20

Answer:

The list of those two situations is given below.

Explanation:

Case 1:

Yet another condition for manual cluster formation that wasn't an improvement would be whenever the number of observations measured is higher than even the machine can accommodate.  

Case 2:

The second scenario which isn't an improvement whenever the original data is recognized for automated cluster analysis, and therefore also implementing the algorithms doesn't generate any extra details.

Answer: provided in the explanation section

Explanation:

FCC is the abbreviation for The Federal Communications Commission (United States Federal Communication Commission). It is, as a rule, an administrative area. It is a free Federal administrative office of the United States government dependable straightforwardly to Congress, built up by the Communications Act and made by resolution to manage interstate and worldwide interchanges by radio, TV, wire, satellite, and link. It includes an investigation on pending changes in the remote world.

FCC certainly has consequences for the present status of 5 GHz Bridging Spectrum. As far as possible one of the U-NII groups which can be utilized outside with the 5.725-5.825 band which is perfect fitting open air tasks. The 2.4 GHz ISM band might be utilized outside where the yield power at the purposeful radiator can't surpass 1 watt. In the United States, the FCC manages the frequencies utilized, the yield power levels, and the open air utilization restrictions.

There is an effect of the FCC 5 GHz U-NII report and a request on Wi-Fi Networks. FCC's activities are to change some specialized principles for the 5 GHz U-NII groups. The specialized change that is affirmed is - U-NII 1 band (5.150 - 5.250 GHz) indoor activity limitation being evacuated permitting utilization of the band for open air hotspots, WISPs, and scaffold joins. There will be a development of open hotspots profiting by this change. The FCC considers 11 channels under the Operating Frequencies.

The FCC has characterized UNII-2 and UNII-3 groups, the two of which had four channels. The channels were divided 20 MHz separated with a RF range data transmission of 20 MHz giving non-covering channels utilizing 20 MHz channel width.

The UNII-2 band was assigned additionally for open air tasks and allowed outside recieving wires. The UNII-3 band was proposed for open air connect items and allowed outer radio wires, however the UNII-3 band is likewise utilized for outside 802.11a/n/air conditioning WLANs.

FCC (America) underpins Operating Frequency Range for 802.11b and 802.11g on Center Frequency: 2412, 2417, 2422, 2427, 2432, 2437, 2442, 2447, 2452, 2457, 2462. FCC has delivered an amendment to the guidelines covering the 5 GHz 802.11a channel utilization. This correction has included 11 extra channels, carrying the accessible channel's ability to 23 channels.

As far as possible your complete force yield by utilizing a sliding scale when you set up a significant distance Wi-Fi connect. The scale really begins at 30 dBm of enhancement power utilizing a 6 dBi directional reception apparatus. For each 1 dBm drop in enhancement power, there would be an expansion in the intensity of directional radio wire by 3 dBi. The FCC permits this sliding scale since when you utilize a bigger highlight point radio wire, your shaft example will cover less territory and cause less impedance for other people.

Answer:

a) [00:05:00]

Explanation:

Timestamps are markers in a transcript which are used to represent when an event took place. Timestamps are in the format [HH:MM:SS] where HH is used to represent hour, MM to represent the minute and SS to represent the seconds. They are different types of timestamping such as:

i) Periodic time stamps: Occurs at a consistent frequency

ii) Paragraph time stamping: At the beginning of paragraphs

iii) Sentence time stamp: at the beginning of sentence

iv) Speaker time stamp: at change of speaker.

Since a part of 5-15 minutes with time-stamping (every 30 seconds), The time stamping should start at 5 minute [00:05:00] and end at [00:15:00]. This is a periodic time stamp since it occurs every 30 seconds, this means the next time stamp would be [00:05:30] and this continues until 15 minute [00:15:00]

Based on the information given, the time stamping will be A. [00:05:00]

It should be noted that timestamps simply mean the markers that we in a transcript that are used to represent when an event took place.

They are typically in the format [HH:MM:SS]. Therefore, if you are working on the part of 5-15 minutes, time-stamping (every 30 seconds) should start at 00:05:00.

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Answer:

nic is the answer... .. .

they are all eukaryotic cells

Answer:

they are all unicellular

Answer and Explanation:

Technicians who travel constantly and are most likely working from remote locations would require information support that is ready and available as at when needed (24/7). The following would help them access technical information easily:

Internet knowledge based system: this could be like a encyclopedia for technicians where they could easily search up information they need for their work from anywhere.

Web-based system : this can help technicians ask or search for technical information online and also communicate and give out information to other technicians.

fax and email: a ready and available email support system and fax would boost information availability to technicians

Based on the information given, the system that should be implemented should be one where the information will be stored in a database.

Also, the system will have an application that the technicians will use to login into the system. It should also be noted that the system will be divided based on the technician's roles.

In this case, the technicians will have different access that they can use to get the data from the database.

Lastly, encryption should be used to secure the data.

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Answer:

The program written in python is as follows

prices = "34.62 76.30 85.05"

stock_prices = prices.split()

for price in stock_prices:

     print('s', price)

Explanation:

This line initialized the input prices using a string variable named prices

prices = "34.62 76.30 85.05"

This line converts prices to list

stock_prices = prices.split()

The following iteration prints each element of the list

for price in stock_prices:

     print('s', price)

Explanation:

Our technological world has become deeply dependent upon the continuous availability of electrical power. In most countries, commercial power is made available via nationwide grids, interconnecting numerous generating stations to the loads. The grid must supply basic national needs of residential, lighting, heating, refrigeration, air conditioning, and transportation as well as critical supply to governmental, industrial, financial, commercial, medical and communications communities. Commercial power literally enables today’s modern world to function at its busy pace. Sophisticated technology has reached deeply into our homes and careers, and with the advent of e-commerce is continually changing the way we interact with the rest of the world. Intelligent technology demands power that is free of interruption or disturbance. The consequences of large-scale power incidents are well documented. A recent study in the USA has shown that industrial and digital business firms are losing $45.7 billion per year due to power interruptions.1 Across all business sectors, an estimated $104 billion to $164 billion is lost due to interruptions with another $15 billion to $24 billion due to all other power quality problems. In industrial automatic processing, whole production lines can go out of control, creating hazardous situations for onsite personnel and expensive material waste. Loss of processing in a large financial corporation can cost thousands of unrecoverable dollars per minute of downtime, as well as many hours of recovery time to follow. Program and data corruption caused by a power interruption can create problems for software recovery operations that may take weeks to resolve. Many power problems originate in the commercial power grid, which, with its thousands of miles of transmission lines, is subject to weather conditions such as hurricanes, lightning storms, snow, ice, and flooding along with equipment failure, traffic accidents and major switching operations. Also, power problems affecting today’s technological equipment are often generated locally within a facility from any number of situations, such as local construction, heavy startup loads, faulty distribution components, and even typical background electrical noise

Hey There!!~ I think the best answer is A). An event in which electricity coming into a device exceeds 120 volts for three or more nanoseconds an event in. Because, An unexpected increase in the amplitude of a signal that lasts for two or less nanoseconds anything more is considered a surge. If not properly protected, a power spike can cause damage to any electrical component, including a computer. And, All electrical devices, including your computer, should have a surge protector to help prevent them from becoming damaged when an electrical surge occurs.

Hope This Helps....!!~

Answer:

True

Explanation:

It is possible to organize a classroom environment to promote social interaction and minimize potential points of stress