Mood
Explanation:
Because it gets changed by the time you are happy or sad. Same that while you are reading if you like your. mood gets good but if you dont find this ans satisfied your mood gets changed.
Answer:v True
Explanation: Open source operating system is the system that has source code that can be modified and enhance them . It can also be shared between the public as it is available in the open form . There are many examples of the open source operating system like Linux, Ubuntu etc. which has both executable code and source code as well. so therefore the given statement is true.
Answer:
b. LinkedHashSet
Explanation:
A LinkedHashSet is an ordered version of HashSet that maintains a doubly-linked List across all elements. When the iteration order is needed to be maintained this class is used. LinkedHashSet maintains a linked list of the entries in the set, in the order in which they were inserted.
Answer:
Registry
Explanation:
Windows Registry is used to store the configuration and setting information for hardware and software program which is critical for Windows operation. The registries are structured in hierarchical database model.
Basically, hierarchical database model is akin to a tree format which consist of the parent nodes and their child nodes. For example, a node named as HKEY_LOCAL_MACHINE can possess child nodes HARDWARE, SOFTWARE AND SYSTEM.
The node in the tree is also termed as a key.