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Count how many numbers are negative in an array? Approach: Assume array of integer arr = [5,-9,66,-8,37] As  we know a negative number is a real number less than zero We are going to apply the same logic here , and check the number of negative numbers in the array. Expected output is : 2 ,since there are 2 negative numbers among the set of numbers Implementing in Java /* Read input from STDIN. Print your output to STDOUT*/ import java.io.*; import java.util.*; public class CountNegativeNumbers{   public static void main(String args[] ) throws Exception { //Write code here Scanner scan = new Scanner(System.in); int n = scan.nextInt();    // takes user input int a[] = new int[n];   // creates array depending on the user input int count=0;              //count variable which is zero initially for(...

Find the biggest difference between any two numbers in array? Approach: Assume array of integer arr = [5,9,66,8,37]  Two calculate biggest difference between two numbers logic is largest number - smallest number . By arranging the array in ascending order we get the first element which is smallest and the last element which is largest. Now the array look like integer arr =[5,8,9,37,66] Here the solution is last element (largest number)- first element(smallest number) i.e; 66-5= 61 Implementing in Java /* Read input from STDIN. Print your output to STDOUT*/ import java.io.*; import java.util.*; public class BiggestDifference{   public static void main(String args[] ) throws Exception { //Takes user input Scanner sc = new Scanner(System.in); int n = sc.nextInt(); //create an array depending upon the number of user inputs int[] array = new int[n]; //insert user input elements into the array for(int i = 0; i < n; i++) ...

Android Interview Questions Which was the first mobile brand with Android Application?                           Answer :   First Mobile brand with Android Application was HTC. What is the current version of android and its API ?   Answer: Current version of android  is “Pie” (as per Nov 2018) and its API level 28. Life cycle of Activity ? Answer: OnCreate() - This method is called when the activity is created . It is called only once in activity lifecycle. OnStart() - This method is called when the activity is getting started , no user interactions will be done at this stage,and this method will be called several times in activity life cycle depending upon the user navigation.(Loads UI) OnResume()- On this method call user can interact with the activity and perform actions like click. OnPause()- W...