MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -A key–value database, or key–value store, is a data storage paradigm designed for storing, retrieving, and managing associative arrays, and a data structure more commonly known today as a dictionary or hash table.

Detailed explanation-2: -A key-value database stores data as a collection of key-value pairs in which a key serves as a unique identifier. Both keys and values can be anything, ranging from simple objects to complex compound objects.

Detailed explanation-3: -A dictionary is an unordered data structure with elements separated by a comma and stored as a key-value pair. It is enclosed within curly brackets. Also, the key-value pair is separated by a : (colon).

Detailed explanation-4: -Different languages enforce different type restrictions on keys and values in a dictionary. Dictionaries are often implemented as hash tables.

Detailed explanation-5: -A hashmap is a structure able to store key-value pairs. The value is any object your application needs to handle, and a key is something that can represent this object.