Android Development Android UI and Layouts 3

Question 1

What is the role of the merge tag in Android XML layouts?

Accepted Answer

To eliminate redundant view groups when including layouts

Answer

To merge two activities

Answer

To combine multiple adapters

Answer

To join fragments

Question 2

Which ConstraintLayout feature allows multiple views to be evenly spaced using a chain?

Accepted Answer

Chain style

Answer

Group constraint

Answer

Barrier

Answer

Guideline

Question 3

What is a ViewHolder pattern used for in Android?

Accepted Answer

To cache view references and avoid repeated calls to findViewById

Answer

To hold the ViewModel instance

Answer

To store Fragment back stack

Answer

To manage lifecycle of views

Question 4

Which XML attribute sets a fixed aspect ratio for a view in ConstraintLayout?

Accepted Answer

app:layout_constraintDimensionRatio

Answer

android:ratio

Answer

app:aspectRatio

Answer

android:scaleType

Question 5

What method inflates a layout resource in Android?

Accepted Answer

Both A and B

Answer

LayoutInflater.inflate()

Answer

View.inflate()

Answer

Context.inflate()

Question 6

Which attribute in RecyclerView sets the orientation for LinearLayoutManager?

Accepted Answer

app:layoutManager with orientation parameter

Answer

android:orientation

Answer

app:orientation

Answer

android:scrollDirection