Operating System File Systems for GATE CS and IT

To succeed in competitive computer science exams like GATE, a deep and precise understanding of operating system storage is essential. This text-based course breaks down how operating systems manage, store, and retrieve data on physical disks, turning complex theoretical concepts into clear, logical steps. You will transition from basic storage definitions to analyzing and comparing complex allocation strategies and file system architectures. What you will learn: Understand fundamental file concept terminology, directory structures, and basic disk storage mechanisms; Compare contiguous, linked, and indexed file allocation methods along with their performance trade-offs; Analyze the internal structures, compatibility limits, and design choices of FAT32, exFAT, and NTFS; Master disk free-space management techniques including bit vectors and linked lists; Solve typical exam-style problems on indexing, file size calculations, and inode structures; Explore modern storage trends including journaling file systems and basic flash-memory optimization concepts. We begin with foundational definitions of files and directories, then systematically explore allocation algorithms, and conclude with detailed comparisons of modern commercial file systems. This course is designed specifically for computer science students, GATE aspirants, and IT professionals preparing for technical exams with no advanced prerequisites required. Start reading to master the core storage mechanics of modern operating systems.