Answer:
NFC chips
Explanation:
its specifically used to make secure transactions among other things
 
        
             
        
        
        
Answer:
To check if the year comes under each 100th year, lets check if the remainder when dividing with 100 is 0 or not.
Similarly check for 400th year and multiple 0f 4. The following C program describes the function.
#include<stdio.h>
#include<stdbool.h>
bool is_leap_year(int year);
void main()
{
 int y;
 bool b;
  
 printf("Enter the year in yyyy format: e.g. 1999 \n");
 scanf("%d", &y);     // taking the input year in yyyy format.
  
 b= is_leap_year(y);  //calling the function and returning the output to b
 if(b==true)
 {
  printf("Thae given year is a leap year \n");
 }
 else
 {
  printf("The given year is not a leap year \n");
 }
}
bool is_leap_year(int year)
{
 if(year%100==0)   //every 100th year
 {
  if(year%400==0)   //every 400th year
  {
  	return true;
  }
  else
  {
  	return false;
  }
 }
 if(year%4==0)  //is a multiple of 4
 {
  return true;
 }
 else
 {
  return false;
 }
}
Explanation:
Output is given as image
 
        
             
        
        
        
Answer:
A
Explanation:
Using hashes is preferred because encrypted IOS passwords can be easily decrypted.
 
        
             
        
        
        
Answer:
When searching for articles using library databases, the following tips should increase the relevance of your results. Quotation marks around two or more keywords - phrase searching - ensures that the results will include the exact phrase.
Explanation: