Unreal Engine Blueprints Managing Data Structures 2

Question 1

Which Blueprint node removes a specific element from an array by its value rather than its index?

Accepted Answer

Remove Item

Answer

'Remove Item' searches the array for a matching value and removes the first occurrence found.

Question 2

What happens when you call 'Clear' on a Blueprint Map variable?

Accepted Answer

Removes all key-value pairs, leaving an empty map

Answer

The 'Clear' node empties the map of all entries but the variable itself remains and can still be used.

Question 3

In Blueprints, what is the correct way to iterate over every key in a Map variable?

Accepted Answer

Keys node feeds into a For Each Loop

Answer

The 'Keys' node returns an array of all keys, which you can then feed into a standard For Each Loop.

Question 4

Which node would you use to check how many elements are currently stored in a Blueprint Set?

Accepted Answer

Num

Answer

The 'Num' node works on Arrays, Maps, and Sets to return the current element count.

Question 5

When you add a duplicate value to a Blueprint Set, what is the result?

Accepted Answer

The duplicate is silently ignored; the Set is unchanged

Answer

Sets enforce uniqueness, so adding an already-present value has no effect and generates no error.

Unreal Engine Blueprints Practice Test