Answer:
B.O(n).
Explanation:
Since the time complexity of visiting a node is O(1) in iterative implementation.So the time complexity of visiting every single node in binary tree is O(n).We can use level order traversal of a binary tree using a queue.Which can visit every node in O(n) time.Level order traversal do it in a single loop without doing any extra traversal.
Answer:controlling a situation by making things happen or by preparing for possible future problems
Explanation:
Answer:
expr.at(g) returns a string, not a char. They are not the same thing and that is what the compiler is complaining about.
Answer:
Discretionary Access Control model
Explanation:
Discretionary Access Control (DAC) gives owners of a resource full control of objects/items they have created or been given access to, this also includes sharing the objects/items with other subjects. These owners have control over their data and maintain access through ACLs. The access-control list (ACL), is a list of permissions attached to an object in a computer file system.
The Owners can decide to grant other users access to their files, change their attributes, alter them, or delete them. DACs are discretionary because the owner can transfer information access to other users.
