Question

The "extra" key value is a _________ value.

a) True
b) Null
c) Undefined
d) Empty

Answer 1

The "extra" key value in a programming context, when not explicitly assigned, is typically referred to as 'undefined' in languages like JavaScript.

Step-by-step explanation:

The "extra" key value refers to a value associated with a key in a key-value pair, typically found in data structures or programming contexts such as objects, dictionaries, maps, or records. When a key does not have an explicitly assigned value, or its value is not present, it can be considered as an undefined value in programming languages like JavaScript. In other contexts, a key without a set value could be referred to as null or empty, but in JavaScript undefined is a specific type indicating the absence of a value.