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Vlada [557]
2 years ago
13

Using a wireless technology known as ___, many smartphones can now be tapped on special payment devices to complete your purchas

e at select stores.
Computers and Technology
1 answer:
AnnyKZ [126]2 years ago
3 0

Using a wireless technology known as Near-field communication (NFC), once activated on the smartphone, allows payments or purchases to be made at select stores.

<h3>What is Near-field communication (NFC)?</h3>

NFC is a set of short-range wireless technologies that typically require a distance of 4 cm or less to initiate a connection.

<h3>Characteristics of Near-field communication (NFC)</h3>

  • For it to work, it is necessary to place two spiral-type antennas within these close electromagnetic fields.

  • This technology is built on radio frequency identification, which allows a gadget to send radio waves to another gadget or another tag and trigger a certain action.

  • The NFC acts on the smartphones just like the RFID chips of the bank cards with which you can make payments or purchases.

Therefore, we can conclude that the NFC allows two devices to exchange data when in close proximity to each other.

Learn more about Near-field communication (NFC) here: brainly.com/question/3942098

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Write a java program called allDigitsOdd that returns whether every digit of a positive integer is odd. Return true if the numbe
Vlada [557]

Answer:

public class Digits

{

   public static boolean allDigitsOdd(int num)

   {

       boolean flag=true;

       int rem;

       while(num>0)

       {

           rem=num%10;

           num=num/10;

           if(rem%2==0)    // if a even digit found immediately breaks out of loop

           {

               flag=false;

               break;

           }

       }

       return flag;     //returns result

   }

   public static void main(String args[])

   {

       System.out.println(allDigitsOdd(1375));    //returns true as all are odd digits

   }

}

OUTPUT :

true

Explanation:

Above program has 2 static methods inside a class Digits. Logic behind above function is that a number is divided by 10 until it is less than 0. Each time its remainder by 0 is checked if even immediately breaks out of the loop.

4 0
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