Operating Systems
53 articles in this topic
User-Level vs Kernel-Level Threads for GATE: The Three Multithreading Models, Decided
Decide thread-model statements by asking who schedules the thread and what a blocking call stalls. Six worked judgements make the comparison concrete.
Updated 8 Aug 20265 min readOperating Systems
Inter-Process Communication for GATE: Shared Memory, Message Passing and Pipes Compared
Learn who moves the data and who provides synchronization in each IPC model, then test the distinction through six carefully adjudicated statements.
Updated 6 Aug 20266 min read60 viewsOperating Systems
Coal India MT Eligibility and Selection Process: What the Notification Actually Says
Use the current Coal India notification to verify your degree, percentage, age and selection route before you prepare for a CBT or depend on a GATE score.
Updated 3 Aug 20266 min readOperating Systems
UPPSC Polytechnic Lecturer (CS): Eligibility and the Full Selection Process
A B.Tech or M.Tech label alone does not settle lecturer eligibility, and the written exam may not be the final stage. Read the complete funnel before planning.
Updated 1 Aug 20265 min read89 viewsOperating Systems
BTSC Lab Assistant (CS): Eligibility and the Selection and Merit Process
A practical way to verify your BTSC Lab Assistant CS qualification, read the selection clause correctly, and prepare the documents that decide candidature.
29 Jul 20267 min readOperating Systems
Multithreading in Java: Thread Lifecycle, synchronized and the Interview Question Set
Understand what Java threads share, trace a lost counter update, and separate BLOCKED, WAITING, and TIMED_WAITING with code you can explain.
Updated 27 Jul 20267 min readOperating Systems
Magnetic Disk Numericals for GATE: Capacity, Seek Time and Transfer Rate Solved
Turn disk geometry into four reliable calculations. One fully specified disk is solved for capacity, rotation time, transfer rate and sector access time.
Updated 29 Jul 20266 min readOperating Systems
Final Year Placement Preparation Plan: A 90-Day Schedule for Aptitude, Coding and Interviews
Run aptitude, coding and interviews as three connected streams across 90 days. The schedule includes weekly hours, phase checkpoints and a rule for missed days.
Updated 25 Jul 20266 min readOperating Systems
fork() Questions in GATE
Trace three common fork() patterns without the off-by-one error, then handle return values, loops, printed output, and inherited buffers.
Updated 20 Jul 20265 min read153 viewsOperating Systems
Operating System Interview Questions for Freshers: Top 50 with Answers
50 operating system interview questions for freshers, every one answered and grouped into the follow-up chains interviewers walk: process vs thread, context-switch cost, scheduling trade-offs, synchronization to deadlock, paging to thrashing, plus file-system quick-fires and a two-week prep plan.
19 Jul 202617 min read54 viewsOperating Systems
IBPS SO IT Officer Operating Systems: professional knowledge topics
IBPS SO IT Officer Operating Systems: master processes, CPU scheduling, memory management, deadlock and process synchronization for the Mains PK paper.
Updated 18 Jul 20266 min read164 viewsOperating Systems
File systems and disk scheduling in OS: allocation, directories and seek time
A file system is the operating system's answer to a simple-sounding question: where on the disk does each file's data actually live, and how do we find it again quickly? Disk scheduling is the follow-up: when many read and write requests are queued, in what order should the head service them so the disk arm travels least? The two meet in one place: how the file system scatters a file's blocks decides how far the arm travels to read them back. Both are steady exam scorers.
Updated 16 Jul 20265 min read76 viewsOperating Systems