Answer:
B. False
Explanation:
A page-replacement policy can be defined as a set of algorithm that instructs the operating systems on what memory page is to be swapped, paged out or written to disk in order to allocate more memory as they're required by various active processes during virtual memory management.
Some of the algorithms or techniques used by the operating system for page-replacement policy are;
1. Last In First Out (LIFO).
2. First In First Out (FIFO).
3. Least Recently Used (LRU).
4. Least Frequently Used (LFU).
5. Optimal (OPT or MIN).
Hence, the page-replacement policy means that pages are placed to make more space and to minimize the total number of page that would be missing.
The answer is Space shuttle.
Answer:
The answer is below
Explanation:
There are several components of operating systems, this may be based on the specific types of Operating systems. However, here are some of the major components.
1. Kernel: it delivers the primary level of control on all the computer peripherals.
2. Process Execution: it serves as a connection between the hardware and application program
3. Interrupt: it provides a dependable technique for the OS to transmit & respond to their surroundings.
4. Memory Management: it regulates main memory and then moves processes between disk & main memory during implementation.
5. Multitasking: it interprets the activities of many independent computer programs on a similar computer system.
6. Networking: it defines the interaction of processor through communication lines
7. Security: it protects the activities of other processes going in the system
8. User Interface: it provides permission for a computer operator to get the information.
Answer and Explanation:
The ways in which a layered pattern make use of encapsulation and abstraction are as follows:
- This framework lays its focus mainly on the bundling of related functionalities inside an application into different layer that are vertically stacked over one another.
- Functionality in between each layer is related by common function or role.
- Communication in between the layers is clear and exact and is coupled loosely.
- Providing a layered structure to the application indirectly supports its maintainability and flexibility.
Encapsulation:
Since, features like data type, properties, methods or implementation while designing are not exposed at the boundary of the layer thus No assumptions are required for these features.
Abstraction:
The layered framework abstracts the entire system's view and provides adequate details for better understanding of the roles of each layer individually and the relation that exist between these layers.
