The following block of code assumes RxJava2 usage.Please, describe which scheduler will [map] execute on, [filter] execute on.

fun theTest() {
val io = Schedulers.io()
Observable
.just("long", "longer", "longest")
.subscribeOn(Schedulers.io())
.map {
println("map ${Thread.currentThread().name}")
it.length
}
.observeOn(Schedulers.computation())
.filter {
println("filter ${Thread.currentThread().name}")
it 6
}
.blockingSubscribeBy { length -
println(
"item length $length under " +
Thread.currentThread().name
)
}
}

Question

The following block of code assumes RxJava2 usage.Please, describe which scheduler will [map] execute on, [filter] execute on.

fun theTest() {
        val io = Schedulers.io()
        Observable
            .just("long", "longer", "longest")
            .subscribeOn(Schedulers.io())
            .map {
                println("map ${Thread.currentThread().name}")
                it.length
            }
            .observeOn(Schedulers.computation())
            .filter {
                println("filter ${Thread.currentThread().name}")
                it > 6
            }
            .blockingSubscribeBy { length ->
                println(
                    "item length $length under " +
                            Thread.currentThread().name
                )
            }
    }

Sigiloso · Accepted Answer

We have a food delivery app that connects between a customer,arestaurant，

When user select the restaurant, so the restaurant menu will appear, and the user can add/remove the menu item from his cart.

Additionat info：

1. Each restaurant have their own categories of menus
2. Each restaurant have multiple menu items
3. Each itew have (Itew name, price, image, id, - etc)
4. Cart supports multiple restaurants at the same time-
5. Users can place an order with the menu Items of only one restaurant.
6. Once the user places an order, the cart will be reset.

Extended Case :

1. Implement a Cart management system.
2. Architectural design pattern:
- Android: Move the "RestaurantsFragment. kt" from MVC to MVV

Bonus points:

1. Add unit test of view model layer

Technicel Consideration :

1. Try to follow SOLID principles.
2. Try to use value type protocol oriented programming.
3. Thread safety should be considered,

Example :

Restaurant: KFC

- Categories: Drinks and Desert

Menu Items: Pepsi, 7up

package com.hungerstation.intervienquestionone

import android.service.controls.actions.FloatAction
import com.google.android.material.floatingactionbutton.FloatingactionButton
import com.google.android.material.snackbar.Snackbar
import androidx.appcompat.app.AppCompatictivity
import android.view.Menu
import android.view.MenuItem
import android.widget.ListAdapter
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.material3.Snackbar
import androidx.fragment.app.Fragment
import androidx.navigation.fragment.navargs
import kotlinx.android.synthetic.main.fragment_second.*
import java.io.InputStream
import androidx.navigation.fragment.findNavcontroller
import kotlinx.android.synthetic.main.row_menu.view.*
import android.os.Parcelable
import com.google.gson.annotations.SerializedName
import kotlinx.android.parcel.Parcelize
import android.os.Bundle
import androidx.recyclerview.widget.DividerItemDecoration
import com.google.gson.Gson
import com.google.gson.reflect.TypeToken
import kotlinx.android.synthetic.main.fragment_first.*
import java.io.IOException
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.databinding.DataBindingutil
import androidx.databinding.ViewDataBinding
import android.fragment.app.Fraginent
import android.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView
import java.lo.Inputstream
import java.lang.reflect.Type
import android.widget.ImageView
import android.databinding.BindingAdapter
import com.bumptech.glide.Glide
import com.bumptech.glide.Load.DecodeFormat
import com.bumptech.glide.Load.resourcedrawable.DrawableTransitionOptions
import com.bumptech.glide.request.RequestOptions
import com.bumptech.glide.request.transition.DrawableCrossFadeFactory

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        setSupportActionBar(findViewById(R.id.toolbar))

findViewById(R.id.fab).setOnClickListener { view ->
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                .setAction("Action", null).show()
        }
    }

override fun onCreateOptionsMenu(menu: Menu?): Boolean {
        menuInflater.inflate(R.menu.menu_main, menu)
        return true
    }

override fun onOptionsItemSelected(item: MenuItem): Boolean {
        return when (item.itemId) {
            R.id.action_settings -> true
            else -> super.onOptionsItemSelected(item)
        }
    }
}

class MenuFragment : Fragment() {

val args: MenuFragmentArgs by navArgs()

lateinit var menuListAdapter: MenuListAdapter

override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_second, container, false)
    }

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        menuListAdapter = MenuListAdapter()
        menuRecycler.adapter = menuListAdapter
        val itemDecorator = DividerItemDecoration(context, DividerItemDecoration.VERTICAL)
        menuRecycler.addItemDecoration(itemDecorator)
        menuListAdapter.submitList(args!!.menuCategory.asList())
    }

}

class MenuListAdapter : ListAdapter(MenuListItemDiffCallback()) {

override fun onCreateviewHolder (parent: ViewGroup, viewType: Int): MenuListViewHolder {
        val layoutInflater = LayoutInflater.from(parent.context)
        val binding =
            DataBindingUtil.inflate(layoutInflater, viewType, parent, false)
        return MenuListViewHolder(binding)
    }

override fun onBindViewHolder(vh: MenuListViewHolder, position: Int) =
        vh.bind(g

HungerStation

Pergunta de entrevista da empresa HungerStation

Resposta da entrevista

Empresas seguidas

Buscas de vagas