Process States + PCB
Process states, state-transition diagram, PCB or five process-management activities.
VERY HIGH01 / FIRST MOVE
10 topics you cannot afford to skip
Start here. These are the strongest preparation signals from the three uploaded papers.
01System Calls3/3 years95%
02Process + PCB3/3 years90%
03Page Replacementmemory family90%
04Semaphore + Sync3/3 years90%
05File System3/3 years88%
06Disk Scheduling2/3 years80%
07Deadlockstrong family80%
08Distributed Systems3/3 years85%
09CPU Schedulingrecurrent70%
10I/O Managementfresh 2025 signal60%
02 / EXAMINER DNA
RGPV doesn't just repeat. It rotates.
The most useful insight is not “what appeared?” but “which subtopic can rotate next?”
SYNC FAMILY🔮 ROTATION ALERT
2023Mutual Exclusion
Readers-Writers
→Readers-Writers
2024Semaphore
Binary / Counting
→Binary / Counting
2025Dining Philosophers
Concurrency
Concurrency
MEMORY FAMILY🔮 ROTATION ALERT
2023Paging +
Segmentation
→Segmentation
2024Segment Table
Addressing
→Addressing
2025Optimal
Page Replacement
Page Replacement
DISK FAMILY🔮 ROTATION ALERT
2023SCAN
LOOK
→LOOK
2024No major
disk numerical
→disk numerical
2025SSTF + SCAN
+ LOOK
+ LOOK
03 / PREDICTION ENGINE
What I would prepare if the exam were tomorrow
Prediction is an inference from the uploaded papers, not a claim of the exact future paper.
🔥 STRONGEST BET
System Calls + Process + Memory + Synchronization
These topic families have the strongest recurring signal across the three papers. Prepare them as complete answer families, not single questions.
3/3 SYSTEM CALLS 3/3 PROCESS 3/3 MEMORY 3/3 SYNC
Very High85–95%System Calls • Process • Memory • Sync
High75–85%File System • Disk • Deadlock • Distributed
Watch50–70%I/O • Kernel • lower-signal rotations
04 / MOCK INTELLIGENCE
Predicted paper blueprint
Use this like a final mock-paper map. Learn the family behind every question.
AD/CD/CS/SD-405OPERATING SYSTEMSMost likely preparation blueprint
System Calls + Scheduling
System call types/working plus CPU scheduling theory or numerical.
VERY HIGHDisk Scheduling Numerical
FCFS / SSTF / SCAN / LOOK family; also prepare C-SCAN and C-LOOK.
HIGHPage Replacement + Memory
FIFO / LRU / Optimal plus paging, segmentation or virtual memory.
VERY HIGHFile System
Contiguous, linked, indexed allocation OR directory/access methods.
HIGHSemaphore + Synchronization
Semaphore types plus Critical Section / Readers-Writers / Producer-Consumer.
VERY HIGHDistributed Systems
Failures, process migration, RPC or DFS.
HIGHDeadlock + Short Notes
Prevention/avoidance plus system calls, paging, sync or kernel architecture.
HIGH05 / NUMERICAL ATTACK ZONE
These can decide your marks
Do not prepare Operating Systems as theory-only. The uploaded papers contain calculation/application questions.
Disk Scheduling
FCFS • SSTF • SCAN • C-SCAN • LOOK • C-LOOK
Practice the full familyPage Replacement
FIFO • LRU • Optimal • Page Fault Count
Highest numerical prioritySegmentation
Segment table → logical address → physical address
Show every calculation stepDeadlock
Banker's Algorithm • Avoidance • Resource reasoning
Know safe-state logic06 / TOPPER CHECKLIST
Top 20 — turn revision into a score
Click a row when you can write the answer without opening notes.
WAR-ROOM PROGRESS0 / 20 mastered
07 / TIME-ATTACK MODE
If you have only...
Emergency revision mode for the final stretch.
⏱ 1 DAY
Study 10
System Calls • Process/PCB • Page Replacement • Semaphore • File Allocation • Disk Scheduling • Deadlock • Distributed Systems • CPU Scheduling • Paging/Segmentation
⚡ 6 HOURS
Study 6
System Calls • Process/PCB • Page Replacement • Semaphore • File Allocation • Disk Scheduling
🚨 2 HOURS
Revise 4
System Calls • Process States/PCB • Page Replacement • Semaphore — then scan formulas and diagrams.