Answer:
System calls = 500000
Explanation:
Instructions that a computer can execute = 1 billion instructions/sec
Instructions that a system call takes including the trap and context switching = 1000 instructions
When half of the CPU time is on application, n system calls can be executed in 1 second.
Therefore we'll get an equation as following.
1000 * n = 0.5 * 1000000000
n = 0.5 * 1000000000 / 1000
n = 500000
System calls = 500000
Answer:
Following are the program to this question:
#include <iostream> //defining header file
using namespace std;
int hailstoneLength(int n) //defining method hailstoneLength
{
int t=1; //defining integer variable assign
while(n!=1) //define a loop that checks value is not equal to 1
{
if(n%2==0) // check even number condition
{
n=n/2; // divide the value by 2 and store its remainder value in n
t++; //increment value of t by 1.
}
else
{
n=n*3+1; //calculate and hold value in n
t++; //increment value of t variable by 1
}
}
return t; //return value
}
int main() //defining main method
{
int n; //defining integer variable
cout<<"Enter any number: "; //print message
cin>> n; //input value
cout<<hailstoneLength(n); //call method and print its value
return 0;
}
Output:
Enter any number: 3
8
Explanation:
Program description can be given as follows:
- In the given C++ language program an integer method "hailstoneLength", is declared, that accepts an integer variable "n" in its parameter.
- Inside the method, an integer variable t is declared, that assign a value that is 1, in the next line, a while loop is declared, that uses if block to check even condition if number is even it divide by 2 and increment t variable value by 1.
- If the number is odd it will multiply the value by 3 and add 1 and increment t by 1 then it will go to if block to check value again. when value of n is not equal to 1 it will return t variable value.
- In the main method, an integer variable "n" is used that call the method and print its return value.
Answer:
C. NFC
Explanation:
NFC stands for Near Field Communication. NFC is been embedded in recent mobile device (ranging from phone to tablet) to ease payment. NFC is a short-range high frequency wireless communication technology that enables the exchange of data between devices over about a 10 cm distance.
From the option, Bluetooth look like a probable answer but when they are both compared; we realized that NFC has a shorter set-up time over bluetooth and is therefore faster than bluetooth.
