Linux and Windows OS design principles and distributed system fundamentals. - One Line Questions

1. What is a 'process group' in Linux? — A collection of related processes that can be managed together, often for signal handling
2. What is a 'process scheduler' in an operating system? — A component that determines which processes get to use the CPU and for how long
3. What is a 'virtual file system' (VFS) in Linux? — An abstraction layer that allows the kernel to interact with different file system types uniformly
4. What is 'eventual consistency' in distributed systems? — A consistency model where, if no new updates are made, eventually all replicas will converge to the same state
5. What is a 'mutex' in the context of concurrent programming and operating systems? — A synchronization primitive that ensures only one thread can access a resource at a time
6. What is a 'distributed lock' in the context of distributed systems? — A way to ensure exclusive access to a shared resource across multiple nodes
7. What is the Windows equivalent of a Linux daemon? — A service
8. What is the 'System V IPC' mechanism in Linux? — A set of legacy IPC mechanisms including message queues, semaphores, and shared memory segments
9. In a peer-to-peer (P2P) distributed system, what is a key characteristic? — Decentralized resource sharing among participants
10. What is a 'distributed transaction'? — A transaction that involves multiple distributed nodes, requiring coordination to ensure atomicity (all or nothing)
11. What is a 'kernel module' in Linux? — A piece of code that can be loaded into and unloaded from the kernel on demand, extending its functionality
12. Linux's kernel architecture is primarily characterized by its use of: — A hybrid kernel approach with loadable modules
13. In distributed systems, what is a 'quorum'? — A minimum number of nodes that must agree to a decision or operation for it to be considered valid
14. What is a 'daemon' in Linux? — A background process that runs without direct user interaction
15. What is a 'container' in modern computing, often associated with Linux? — An isolated environment that shares the host OS kernel but has its own filesystem, processes, and network stack
16. What is the primary command-line interpreter in modern Windows versions? — PowerShell
17. What is the 'CAP theorem' in distributed systems concerned with? — Consistency, Availability, and Partition Tolerance
18. According to the CAP theorem, a distributed system can only guarantee two out of the following three properties at any given time: — Consistency, Availability, Partition Tolerance
19. What is a common challenge in distributed systems related to data consistency? — Maintaining identical data across all replicas in the face of concurrent updates and network delays
20. Which Linux process management concept allows a parent process to create a new process that is a near-identical copy of itself? — fork()
21. What is the primary file system used by modern Windows versions? — NTFS
22. Which Linux filesystem is known for its journaling capabilities, improving data integrity after crashes? — ext4
23. What is a key advantage of a microkernel design? — Increased system stability and security
24. What is a primary disadvantage of a microkernel design compared to a monolithic kernel? — Slower performance due to frequent context switching and IPC
25. What is the primary role of a kernel in an operating system? — Managing hardware resources and system processes
26. What design principle in operating systems focuses on dividing tasks into smaller, manageable units that can be executed independently? — Modular design
27. Which type of distributed system architecture involves a central server that manages resources and client requests? — Client-server
28. Which IPC mechanism is commonly used in Linux for communication between related processes? — Pipes
29. In Windows, what is a common IPC mechanism that utilizes named objects for communication? — COM (Component Object Model)
30. Which of the following is a common shell in Linux distributions? — Bash
31. Windows NT kernel architecture is best described as: — Hybrid kernel
32. What is 'virtualization' in the context of operating systems and distributed systems? — Creating a logical representation of computing resources that abstracts away the physical hardware
33. Which concept in distributed systems refers to the ability of a system to continue operating, possibly at a reduced level, even if some of its components fail? — Fault Tolerance
34. Which of the following is a core component of the Linux kernel responsible for process management, memory management, and device management? — Kernel
35. What is a common challenge in designing distributed systems related to time? — Synchronizing clocks across geographically dispersed nodes
36. What is 'idempotence' in distributed systems? — The ability of an operation to be performed multiple times without changing the result beyond the initial application
37. In distributed systems, what does 'scalability' refer to? — The ability to handle increasing amounts of work by adding resources
38. What is the 'Executive' in the Windows NT kernel architecture? — A layer above the microkernel that provides core OS services like I/O, memory management, and process management
39. What is 'inter-process communication' (IPC)? — A mechanism that allows different processes to exchange data and synchronize their actions
40. What is the 'context switch' in operating systems? — Saving the state of a running process and loading the state of another process to allow the CPU to switch between them
41. In Linux, what is the 'init' system (e.g., System V init, systemd)? — The first process started by the kernel, responsible for initializing the rest of the system and managing services
42. What is the primary purpose of a 'process ID' (PID) in both Linux and Windows? — To uniquely identify a running process within the operating system
43. What is the primary purpose of 'load balancing' in distributed systems? — To distribute incoming network traffic and computational workload across multiple servers to optimize resource utilization and response time
44. What is a 'semaphore' used for in operating systems? — To control access to a shared resource by multiple processes or threads, allowing a specified number of them to access it concurrently
45. What is the primary function of a shell in Linux? — To execute commands and scripts
46. Windows uses a registry to store configuration settings. What is the primary role of the Windows Registry? — To store hardware and software configuration information
47. What is the role of the 'Windows Registry Editor' (regedit.exe)? — To view and modify the Windows Registry, which stores configuration settings
48. In Windows, what is the equivalent of the Linux kernel's role in managing system resources? — Kernel-mode drivers and Executive subsystem
49. In Windows, what component is responsible for scheduling threads and managing process lifecycles? — Kernel
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