vamsitallapudi

Android Interview Questions And Answers

Curated List of Real-time Android Interview Questions. Help fellow developers by contributing to these interview Questions - Create a pull request in Github.

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• Core Android
• Dagger
• RxJava

vamsitallapudi

fun main(args: Array<String>) {
    val list = ArrayList(readLine()!!.split(" ").map { it.toInt() })
    selection(list)
    for(i in list) println(i)
}

fun selection(a: ArrayList<Int>) {
    var min:Int
    for (i in 0 until a.size) {
        min = i

vamsitallapudi

package main.dataStructures.sorting

fun main(args: Array<String>) {
    val array = readLine()!!.split(" ").map { it.toInt() }.toIntArray() // 1) Read the input and split into array
    mergeSort(array)
    for(i in array) println(i)
}

fun mergeSort(array : IntArray, helper:IntArray = IntArray(array.size), low:Int = 0, high : Int = array.size-1) {
    if(low < high) {

vamsitallapudi

package main.dataStructures.sorting

fun main(args: Array<String>) {
    var numSwaps = 0
    var isSorted = false
    val str = readLine()!!
    val intList: ArrayList<Int> = ArrayList(str.split(" ").map { it.toInt() }) //1) read values and convert them to arraylist

    var lastUnsorted = intList.size - 1 // 2) to keep the track of unsorted array

vamsitallapudi

package main.dataStructures.sorting

fun main(args: Array<String>) {
    val array = readLine()!!.split(" ").map { it.toInt() }.toIntArray() // 1) Read the input and split into array
    quickSort(array, 0, array.size-1)
    for(i in array) println(i)
}

fun quickSort(array: IntArray, left: Int, right: Int) {
    val index = partition (array, left, right)

vamsitallapudi

public class RetainFragEgActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        Button b = (Button) findViewById(R.id.aaa);
        b.setOnClickListener(new View.OnClickListener() {
            @Override public void onClick(View v) {

vamsitallapudi

package main.interview.hacklandelection

import com.sun.xml.internal.fastinfoset.util.StringArray
import java.util.*

fun main() {
    val list = StringArray()
    var iter = readLine()!!.toInt()
    while(iter-- > 0) {
        list.add(readLine()!!)

vamsitallapudi

package main.algorithms.searching

fun main(args: Array<String>) {
    val input = readLine()!!.trim().split(" ").map { it -> it.toInt() }.toIntArray()  // to read an array (from user input)
    val eleToSearch = readLine()!!.trim().toInt()   // to read the element to be searched (from user input)
    val pos = binarySearchIterative(input, eleToSearch)
    if(pos >= 0 ) {
        println(pos)    // to print position at last
    } else {
        println("Position not found")

vamsitallapudi

package main.algorithms.searching

fun main(args: Array<String>) {
    val input = readLine()!!.trim().split(" ").map { it -> it.toInt() }.toIntArray()    // to read an array (from user input)
    val eleToSearch = readLine()!!.trim().toInt()   // to read the element to be searched (from user input)
    val pos = binarySearchRecursive(input, eleToSearch, 0, input.size -1)
    if(pos >= 0 ) {
        println(pos)    // to print position at last
    } else {
        println("Position not found")

vamsitallapudi

package com.coderefer.rxandroidexamples.intro.operators.create

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import com.coderefer.rxandroidexamples.R
import io.reactivex.Observable
import io.reactivex.Observer
import io.reactivex.disposables.Disposable