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Lesson 5 - Layouts

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Questions and Answers

What can a RecyclerView do to make scrolling more performant?

Animate item views
Destroy item views
Recycle item views (correct)
Create new item views

What function does onBindViewHolder perform in a custom RecyclerView.Adapter?

Create a new view
Destroy the view
Remove the view from the list
Bind the view with new values (correct)

What is the purpose of a custom Adapter extending from RecyclerView.Adapter?

Supplies data and layouts for the RecyclerView (correct)
Deals with screen densities
Handles scrolling in RecyclerView
Manages animations in RecyclerView

In what way do you specify the lengths in dp for your layout?

Using density-independent pixels (dp) (C) Signup and view all the answers

What is put in a pool to be recycled when an item is scrolled offscreen in a RecyclerView?

Item view (C) Signup and view all the answers

What feature allows multiple views to be positioned relative to a single guide?

ConstraintLayout constraints (B) Signup and view all the answers

What are density-independent pixels (dp) in Android?

Pixels that take screen density into account (B) Signup and view all the answers

Why is using ConstraintLayout recommended in Android development?

To improve UI responsiveness and avoid slowdown (D) Signup and view all the answers

What is the purpose of Chains in ConstraintLayout?

To align views horizontally and vertically (A) Signup and view all the answers

How are deeply nested ViewGroups in Android related to UI performance?

They cause UI slowdown and lack of responsiveness (C) Signup and view all the answers

In ConstraintLayout, what does 'layout_constraintTop_toTopOf' attribute do on a TextView?

Aligns the top of the TextView to the parent's top edge (D) Signup and view all the answers

What issue does using Density-independent pixels (dp) address for Android developers?

Inconsistent dimensions across devices (D) Signup and view all the answers