Scala & Spark-Master Big Data with Scala and Spark - Update Value in Map

This video tutorial explains how to update key-value pairs in a map. It begins with a brief introduction to the concept, followed by a demonstration of creating a map with initial key-value pairs. The video then shows how to update the values of specific keys using a simple notation, and concludes by displaying the final state of the map after the updates. The tutorial aims to help viewers become comfortable with manipulating map data structures.

What is the first step in updating a value in a map?

• Check if the key exists

• Refer to the map and provide the key

• Delete the existing key

• Create a new map

Which notation is used to update a value in a map?

• map:key = newValue

• map.key = newValue

• map[key] = newValue

• map->key = newValue

What happens to the value of a key when it is updated in a map?

• The key is removed

• The value is appended

• The previous value is overridden

• The map is duplicated

What will be the value of key 'A' after the update in the example?

• Bat

• Ball

• Banana

• Apple

Which key-value pair remains unchanged after the update?

• A: Banana

• C: Cat

• B: Ball

• A: Apple