Skip to content

Padhai By Astra Cloud

Tribhuvan University
BSc CSIT1 2 3 4 5 6 7 8
BCA1 2 3 4 5 6 7 8
BIT1 2 3 4 5 6 7 8
BIM1 2 3 4 5 6 7 8
BBA1 2 3 4 5 6 7 8
BBS1 2 3 4
Pokhara University
BE Computer (PU)1 2 3 4 5 6 7 8
BBA (PU)1 2 3 4 5 6 7 8
National Examinations Board (+2)
+2 Science1 2
+2 Management1 2
Every subject’s units and teaching hours.
TU
- BSc CSIT
- BCA
- BIT
- BIM
- BBA
- BBS
PU
- BE Computer (PU)
- BBA (PU)
NEB
- +2 Science
- +2 Management
Chapter notes, unit by unit.
TU
- BSc CSIT
- BCA
- BIT
- BIM
- BBA
- BBS
PU
- BE Computer (PU)
- BBA (PU)
NEB
- +2 Science
- +2 Management
Past board questions with worked answers.
TU
- BSc CSIT
- BCA
- BIT
- BIM
- BBA
- BBS
PU
- BE Computer (PU)
- BBA (PU)
NEB
- +2 Science
- +2 Management
Answer, check and learn why.
TU
- BSc CSIT
- BCA
- BIT
- BIM
- BBA
- BBS
PU
- BE Computer (PU)
- BBA (PU)
NEB
- +2 Science
- +2 Management
Notices
- GPA calculatorTU, PU and NEB grade points
- SearchEvery note and question

CACS251 Operating System

BCA · Semester 43 credit hours

Operating System CACS251

SyllabusComing soonUnits and teaching hours for this subject.Open NotesBeing writtenUnit-by-unit notes with examples.Open Old Questions70 questionsFrom TU Board 2026, TU Board 2025, TU Board 2024 and moreOpen MCQ PracticeComing soonAnswer, see if you’re right straight away, and read why.Open

Recent old questions

What is a monolithic kernel? How is it different from microkernel? Explain. [1+4]TU Board 20265 What is multithreading? Explain different types of threads. [1+4]TU Board 20265 Explain the different process states in detail. [5]TU Board 20265 What are the necessary conditions for the deadlock? How deadlock is different from starvation? [4+1]TU Board 20265

All 70 old questions →