147.Maps

What are maps in Java?

• Geographic representations
• Data structures for key-value pairs
• Drawing tools
• Network protocols

What is the difference between map and HashMap in Java?

• No difference, they're the same
• Map is an interface, HashMap is an implementation
• Map is for integers, HashMap is for strings
• Map is single-ended, HashMap is double-ended

Why is a map used in Java?

• For sorting elements
• For storing key-value pairs
• For performing mathematical operations
• For printing values

Is a map a class or an interface?

• Class
• Interface
• Both
• Neither

What are maps and their types?

• Navigation tools
• Data structures for ordered elements
• Data structures for key-value pairs; types include HashMap, TreeMap, and LinkedHashMap
• Graphic elements

What is the difference between map and list in Java?

• Map is for integers, list is for strings
• Map stores key-value pairs, list stores single values
• Map is always sorted, list is unsorted
• There is no difference

Which is faster, Map or HashMap?

• Map
• HashMap
• Both are equally fast
• It depends on the context

What is Java HashMap vs TreeMap vs...?

• Different programming languages
• Different data types
• Different map implementations
• Different sorting algorithms

What is HashMap used for?

• Geolocation
• Sorting elements
• Storing key-value pairs with fast access
• Graph traversal

Can a map have duplicate keys?

• Yes
• No
• Only in certain cases
• Depends on the map implementation