Operating System MCQ for Bihar STET with Answers, PYQs & Notes

Tests in this unit

• PYQ OnlyQuestions asked in the 2023 and 2025 STET papers.27 Q
• Practice BankTopic-wise questions: processes, scheduling, deadlocks, memory, files and security.273 Q
• Full TestEvery question in the Unit 5 bank.300 Q
• Quick Test30 questions picked at random.30 Q

Unit 5 syllabus: Operating System

1. Introduction to OS: functional behaviour and responsibilities; need for monitor / command interpreter; types of operating systems; system structure; hierarchical and layered organization of OS; I/O methods and interrupt structure.
2. Process definition, process states and state transitions; parallel processes and constructs; process interaction; operating system kernel; data structures for processes and resources; context switching; process control primitives; process scheduling.
3. The determinacy problem, mutual exclusion, semaphores, process synchronization.
4. Conditional critical regions and monitors; inter-process communication; deadlock problem and its solutions.
5. Memory management concepts: relocation, linking, multiprogramming with fixed partitions, swapping, variable partitions, overlays, virtual memory, segmentation, paging, storage allocation strategies, load control and thrashing.
6. Organization of file and I/O subsystems: directory management, basic file system, file descriptors, file manipulation, file organization methods, management of auxiliary storage space, command language and file system utilities; I/O subsystems: programmed I/O, DMA, interrupt driven I/O; recovery procedures. Protection and security: safeguards, penetration, access and information flow control, protection problems, formal models of protection.