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Understanding Operating Systems Video Lecture | SSC CGL Tier 2 - Study Material, Online Tests, Previous Year
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FAQs on Understanding Operating Systems Video Lecture - SSC CGL Tier 2 - Study Material, Online Tests, Previous Year
| 1. What is an operating system? |  |
Ans. An operating system is a software that manages computer hardware and software resources and provides services for computer programs. It acts as an intermediary between the computer hardware and the user, allowing the user to interact with the computer system.
| 2. What are the main functions of an operating system? | |
Ans. The main functions of an operating system are:
- Process management: It manages and allocates system resources to different processes running on the computer.
- Memory management: It handles the allocation and deallocation of memory resources for processes.
- File system management: It manages the organization, storage, and retrieval of files on storage devices.
- Device management: It controls and coordinates the use of peripheral devices such as printers, scanners, and disk drives.
- User interface: It provides a way for users to interact with the computer system, either through a command-line interface or a graphical user interface.
| 3. What are the different types of operating systems? | |
Ans. There are several types of operating systems, including:
- Single-user, single-tasking: These operating systems allow only one user to run one program at a time.
- Single-user, multi-tasking: These operating systems allow one user to run multiple programs simultaneously.
- Multi-user: These operating systems support multiple users accessing the system concurrently.
- Real-time: These operating systems are designed for time-sensitive applications and guarantee specific response times for critical tasks.
- Distributed: These operating systems run on multiple machines and work together as a single system, providing increased reliability and performance.
| 4. What is the role of a scheduler in an operating system? | |
Ans. A scheduler in an operating system is responsible for deciding which processes should run and for how long. It determines the order in which processes are executed and allocates CPU time to each process. The scheduler aims to achieve efficient utilization of system resources, maximize throughput, minimize response time, and ensure fairness among processes.
| 5. What is virtual memory? | |
Ans. Virtual memory is a memory management technique used by operating systems to provide the illusion of a larger memory space than physically available. It allows processes to use more memory than is physically present by dynamically swapping data between the physical memory (RAM) and the disk. This technique improves system performance by allowing more programs to run simultaneously and reducing the reliance on physical memory constraints.
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Nov 24, 2024 Last updated |
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