WaheedNazir

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:

WaheedNazir

RelativeLayout layout = (RelativeLayout) findViewById(R.id.rel);

GradientDrawable drawable = new GradientDrawable();
drawable.setColors(new int[] {
                          Color.parseColor("#FFF6B7"),
                          Color.parseColor("#F6416C")
                  });

drawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);
drawable.setOrientation(GradientDrawable.Orientation.LEFT_RIGHT);

WaheedNazir

/**
 * An [Observer] for [Event]s, simplifying the pattern of checking if the [Event]'s content has
 * already been handled.
 *
 * [onEventUnhandledContent] is *only* called if the [Event]'s contents has not been handled.
 */
class EventObserver<T>(private val onEventUnhandledContent: (T) -> Unit) : Observer<Event<T>> {
    override fun onChanged(event: Event<T>?) {
        event?.getContentIfNotHandled()?.let { value ->
            onEventUnhandledContent(value)

WaheedNazir

import okhttp3.OkHttpClient
import java.security.cert.CertificateException
import javax.net.ssl.SSLContext
import javax.net.ssl.TrustManager
import javax.net.ssl.X509TrustManager

class UnsafeOkHttpClient {
    companion object {
        fun getUnsafeOkHttpClient(): OkHttpClient.Builder {
            try {