Java MCQ: What is the Map interface in Java?
a) A collection that maps keys to values
b) A collection that stores elements in a sequence
c) A collection that does not allow null values
d) A collection that allows duplicates
Answer:
a) A collection that maps keys to values
Explanation:
The Map interface in Java represents a collection that maps keys to values, where each key is unique, and each key maps to a single value. Common implementations include HashMap, LinkedHashMap, and TreeMap.
Understanding the Map interface is essential for managing key-value pairs in Java applications, especially when quick lookups and associations are required.
Reference links:
https://www.rameshfadatare.com/learn-java-programming/
https://www.javaguides.net/p/java-tutorial-learn-java-programming.html