Pushpal Roy pushpalroy

Interview Questions

Kotlin

Q1: What is a primary constructor in Kotlin? ☆☆

Answer: The primary constructor is part of the class header. Unlike Java, you don't need to declare a constructor in the body of the class. Here's an example:

Project Title

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Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

	@Composable
	fun InteractiveCanvas(maxWidth: Int, maxHeight: Int) {
	val random = remember { Random.Default }
	var touchPosition by remember { mutableStateOf(Offset.Unspecified) }
	val heartSize = 75F
	val heartPath = createHeartPath(heartSize)
	val heartOffsets = remember { mutableStateListOf<Offset>() }
	val heartColors = remember { mutableStateListOf<Color>() }

	if (heartOffsets.isEmpty()) {

	/*
	Copyright (c) 2025 Andrei Shikov

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	@Composable
	actual fun PlatformColors(statusBarColor: Color, navBarColor: Color){
	val sysUiController = rememberSystemUiController()
	SideEffect {
	sysUiController.setSystemBarsColor(color = topColor)
	sysUiController.setNavigationBarColor(color = bottomColor)
	}
	}

	/**
	* A composable function that displays a text with a typewriter-like effect, revealing characters in chunks.
	*
	* @param text The input text to be displayed with the typewriter effect.
	* @param minDelayInMillis The minimum delay in milliseconds between revealing character chunks, defaults to 10ms.
	* @param maxDelayInMillis The maximum delay in milliseconds between revealing character chunks, defaults to 50ms.
	* @param minCharacterChunk The minimum number of characters to reveal at once, defaults to 1.
	* @param maxCharacterChunk The maximum number of characters to reveal at once, defaults to 5.
	* @param onEffectCompleted A callback function invoked when the entire text has been revealed.
	* @param displayTextComposable A composable function that receives the text to display with the typewriter effect.

	import androidx.compose.foundation.Canvas
	import androidx.compose.foundation.layout.fillMaxSize
	import androidx.compose.runtime.Composable
	import androidx.compose.ui.Modifier
	import androidx.compose.ui.geometry.Offset
	import androidx.compose.ui.geometry.Size
	import androidx.compose.ui.graphics.Color
	import androidx.compose.ui.graphics.drawscope.DrawScope
	import androidx.compose.ui.graphics.drawscope.translate
	import androidx.compose.ui.tooling.preview.Preview

	#!/usr/bin/env bash

	# I've found that the "Migrate to AndroidX" converter in Android Studio doesn't work very
	# well, so I wrote my own script to do the simple job of converting package names.
	#
	# You can download a CSV of package names here: https://developer.android.com/topic/libraries/support-library/downloads/androidx-class-mapping.csv
	#
	# It'll run faster on a clean build because then there are fewer files to scan over.
	#
	# Uses `gsed` because I'm on a Mac. Can easily replace with `sed` if you don't have `gsed`.