Operating Systems
53 articles in this topic
Critical Section in Process Synchronization: Race Conditions and Correctness Worked Step by Step
See how two sensible updates to x can finish at 6, 7, or 8. The worked trace connects race conditions to mutual exclusion, progress, bounded waiting, and safe synchronization choices.
Updated 21 Oct 20266 min readOperating Systems
System Calls and Dual Mode in OS: Mode-Bit Trace, Worked Example and Exam Traps
Follow one read() call across the user-kernel boundary, calculate its stated overhead, and learn the distinctions that make system-call questions easier.
Updated 17 Oct 20265 min readOperating Systems
Semaphores and Process Ordering in OS: P/V Traces, Worked Examples and GATE Traps
Learn one consistent semaphore convention, then trace ordering constraints, shared-variable updates, bounded-buffer permits, rendezvous, and deadlock step by step.
Updated 13 Oct 20265 min readOperating Systems
Round Robin Scheduling Explained: Gantt Charts, Waiting Time and GATE Traps
Learn a fixed Round Robin queue convention, trace staggered arrivals, calculate CT, TAT, WT and RT, and see how quantum size and context-switch cost change results.
Updated 9 Oct 20265 min read63 viewsOperating Systems
Paging and TLB Explained: Address Translation, EMAT and Exam Traps
Follow one virtual address from its VPN through the TLB to a physical frame, then calculate page-table size, TLB reach and effective memory access time.
Updated 4 Oct 20266 min readOperating Systems
Operating System Scenarios: Solve Scheduling, Concurrency, and Page Replacement
Learn one state-trace method for three common OS problem families, then apply it to complete Round Robin, concurrency, FIFO, and LRU examples.
Updated 29 Sep 20265 min readOperating Systems
Tower Research Hiring Process: Stage-by-Stage Prep for Quant and Dev Roles
Prepare for a Tower Research application without treating one online account as a universal process. Use this role-led map, worked drills, and seven-day plan.
Updated 25 Sep 20265 min readOperating Systems
Capital One Recruitment Process: Stage-by-Stage Guide for India Applicants
Prepare for a Capital One India application with a cautious five-stage map, worked technical and case drills, and a practical 14-hour schedule.
Updated 24 Sep 20265 min readOperating Systems
Capgemini Exceller Drive Hiring Process: A Stage-by-Stage Preparation Map
Map each typical Capgemini fresher stage to a concrete practice output before an Exceller drive, then use worked aptitude, coding, interview, and safety checks.
Updated 23 Sep 20265 min read183 viewsOperating Systems
Python Multithreading Tutorial: Threads, Locks and Runnable Examples
Learn when Python threads help, then run deterministic examples using Thread, ThreadPoolExecutor, Lock and Queue. You will also diagnose races and practise safe coordination.
Updated 22 Sep 20266 min readOperating Systems
Linux OS (Operating System): Kernel, Processes, Memory and File Systems with Worked Examples
Connect Linux commands to the OS mechanisms beneath them through exact traces of system calls, a two-process pipe, virtual address translation and file permissions.
Updated 20 Sep 20266 min readOperating Systems
Windows OS Architecture: Processes, Memory, NTFS and Worked Examples
Follow one coherent map of Windows OS architecture, then solve thread scheduling, virtual-address translation and NTFS allocation examples step by step.
Updated 19 Sep 20266 min readOperating Systems