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- How do you represent a key-value pair?
- Which data structure uses key-value pairs?
- Where is key-value pair seen?
- Which collection stores key-value pairs?
How do you represent a key-value pair?
A key-value pair consists of two related data elements: A key, which is a constant that defines the data set (e.g., gender, color, price), and a value, which is a variable that belongs to the set (e.g., male/female, green, 100). Fully formed, a key-value pair could look like these: gender = male. color = green.
Which data structure uses key-value pairs?
A key-value pair is the fundamental data structure of a key-value store or key-value database, but key-value pairs have existed outside of software for much longer. A telephone directory is a good example, where the key is the person or business name, and the value is the phone number.
Where is key-value pair seen?
Key-value pairs are frequently used in lookup tables, hash tables and configuration files.
Which collection stores key-value pairs?
HashMap is a part of Java's collection since Java 1.2. It provides the basic implementation of the Map interface of Java. It stores the data in (Key, Value) pairs, and in order to access a value, one must know its key. HashMap is known as HashMap because it uses a technique called Hashing.
