No, TreeMap does not allow null keys and will throw a NullPointerException. 12 What is the primary difference between Hashmap and TreeMap? Hashmap offers faster operations in an unordered manner, while TreeMap maintains a sorted order with slower logarithmic operations. 11 Is Hashmap synchronize...
set set1; auto ite = upper_bound(set1.begin(), set1.end(), val); // O(n) // O(log n) in case of random access container. auto ite = set1.upper_bound(val);//O(log n) // binary search, uses set property Hope this helps; return 0;...
BTree (in fact B*Tree) is an efficient ordered key-value map. Meaning: given the key, a BTree index can quickly find a record, a BTree can be scanned in order. it's also easy to fetch all the keys (and records) within a range. e.g."all events between 9am and 5pm", "last n...
1) List is an ordered collection it maintains the insertion order, which means upon displaying the list content it will display the elements in the same order in which they got inserted into the list. Set is an unordered collection, it doesn’t maintain any order. There are few implementatio...
List in Java provides ordered and indexed collection which may contain duplicates. The Set interface provides an unordered collection of unique objects, i.e. Set doesn't allow duplicates, while Map provides a data structure based on key-value pair and hashing. All three List, Set, and Map...
Hash is an unordered key-value map. It's even more efficient than a BTree: O(1) instead of O(log n). But it doesn't have any concept of order so it can't be used for sort operations or to fetch ranges. ...
What is the difference between Directed Graph and Undirected Graph? In a directed graph an edge is an ordered pair, where the ordered pair represents the direction of the edge that links the two vertices. On the other hand, in an undirected graph, an edge is an unordered pair, since there...
•Directed Graph:In the directed graph, each edge is defined by ordered pair of vertices. •Non-Directed Graph:In the undirected graph, each edge is defined by unordered pair of vertices •Connected graph:In the connected path, there is a path from every vertex to every other vertex. ...