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Operating System
Process Management
Process Management in OS
Attributes of a Process
Process States
Process Schedulers
Process Queues
Times Related to Process
CPU Scheduling
Scheduling Algorithms
FCFS Scheduling
Convoy Effect in FCFS
FCFS with overhead
SJF Scheduling
Burst Time Prediction
SRTF scheduling
SRTF GATE 2011 Example
Round Robin Scheduling
RR scheduling Example
HRRN Scheduling
HRNN Example
Priority Scheduling
Non Preemptive Priority
Preemptive Priority
SRTF:IO bound processes
Synchronization
Introduction
Critical Section Problem
Lock Variable Mechanism
TSL Mechanism
Priority Inversion in TSL
Turn Variable
Interested Variable
Paterson Solution
Without Busy Waiting
Sleep and Wake
Semaphore Introduction
Counting Semaphore
Problem on counting semaphore
Binary Semaphore
Deadlocks
Introduction
strategies Handling
Deadlock Prevention
Deadlock Avoidance
Resource Allocation Graph
Detection using RAG
Detection and Recovery
Memory Management
Introduction
Fixed Partitioning
Dynamic Partitioning
Compaction
Bit Map for Dynamic Partitioning
Linked List for Dynamic Partitioning
Partitioning Algorithms
GATE on Best Fit & First Fit
Need for Paging
Paging with Example
Binary Addresses
Physical & Logical Address
Page Table
Mapping from page table
Page Table Entry
Page Table Size
Finding Optimal Page Size
Virtual Memory
Look aside Buffer
GATE question on TLB
Demand Paging
Inverted Page Table
Page Replacement
Gate on LRU and FIFO
Numerical on LRU, FIFO
Beladys Anamoly
Segmentation
Paging VS Segmentation
Segmented Paging
File Management
Attributes of the File
Operations on the File
File Access Methods
Directory Structure
Single level Directory
Two level Directory
Tree structured Directory
Acyclic Graph Directories
File System
File System Structure
Master Boot Record
On Disk Data Structures
In memory Data structures
Directory Implementation
Allocation Methods
Contiguous Allocation
Linked List Allocation
File Allocation Table
Indexed Allocation
Linked Index Allocation
Inode
Free space Management
Disk Scheduling
FCFS Scheduling
SSTF Scheduling
SCAN and C-SCAN
Look and C-Look
Numerical on SSTF
Numerical on Disk
Misc
Functions of OS
Mobile OS
Swapping in OS
Threads in OS
Fedora Operating System
Uses of Operating System
Producer-Consumer problem
Dining Philosophers Problem
Readers Writers Problem
History Of OS
Banker's Algorithm in OS
What is the context switching in the operating system
Internal vs. External Fragmentation
Multiprocessing Operating system
Multiprogramming vs Multitasking
Network Operating System
Latest Operating System
System Calls in Operating System
Multitasking Operating System
Distributed Operating System
Fragmentation in Operating System
Multithreading Models in Operating system
Operating system services
Batch Operating System
Embedded Operating System
Time-Sharing vs Real-Time Operating System
Multi-User Operating System
Memory Management
Monolithic Structure of Operating System
MS-DOS Operating System
Spooling in Operating System
Network Operating System vs Distributed Operating System
Operating system vs Application software
System Software vs Operating System
Real-Time operating system
Booting in Operating System
Layered Structure of Operating System
Multiprogramming vs. Time Sharing Operating System
Distributed File System
Multiprogramming Operating System
Server Operating System
32 bit vs 64 bit Operating System
Single User Operating System
Process vs Program
Operating System Security
Components of Operating System
GUI Operating System
Android Operating System
Buffering in Operating System
Device Driver in Operating System
Best Operating System for Hacking
Clustered Operating System
Android vs Windows OS
Scheduler vs Dispatcher
Deadlock vs Starvation
Semaphore vs Monitor
Boot Block and Bad Block in Operating System
Hard and Soft Real-Time Operating System
Concurrency in Operating System
Microkernel in Operating System
Protection in Operating System
Benefits of Multithreading
Host vs Guest Operating System
Livelock in Operating System
Dual Mode Operations in Operating System
What is Access Token in Operating System
Deadlock Detection in Distributed Systems
CUI vs GUI
Monolithic vs layered Operating System
Mutex vs Semaphore
What is Interleaved Memory
Trap vs Interrupt in Operating System
Open-Source Operating System
Multiple Processors Scheduling in Operating System
Starvation and Aging in Operating Systems
Best Android Operating System for PC
Device Management in Operating System
Disk Controller in Operating System
Views of Operating System
Tasks in Real-Time Systems
What is RPC in Operating System
C-SCAN vs SSTF Disk Scheduling Algorithm
Look vs C-Look Disk Scheduling Algorithm
SCAN vs C-SCAN Disk Scheduling Algorithm
SCAN vs FCFS Disk Scheduling Algorithm
Lamport's Bakery Algorithm
Basic Disk vs Dynamic Disk
What is Zombie Process
FCFS vs SSTF Disk Scheduling Algorithm
LRU vs LFU Page Replacement Algorithm
SSTF vs C-LOOK Disk Scheduling Algorithm
C-LOOK vs C-SCAN Disk Scheduling Algorithm
Rotational Latency vs Disk Access Time in Disk Scheduling
SSTF vs LOOK Disk Scheduling Algorithm
Virtual vs Physical Address
Address binding in Operating System
Preemptive vs Non-Preemptive Scheduling
Properties of Operating System
What is Processor Affinity
Seek Time vs Disk Access Time in Disk Scheduling
Seek Time vs Transfer Time in Disk Scheduling
Page vs Block in Operating System
Virtual Memory vs Job Pool
What is Memory Ballooning
Embedded OS vs Desktop OS
Microkernel vs Monolithic Kernel
Spinlock vs Semaphore
What are Demand Paging and Pre-paging
What is Interrupt in OS
Swapping vs Context Switching
System Call vs Library Call
Ubuntu vs Kubuntu
Routine vs Process
Overlays in Memory Management
fork() vs exec()
Latency vs Jitter
Process Contention Scope vs System Contention Scope
Implement Threads in User Space
ISR vs Function Call
POSIX Threads in OS
Best Portable Operating System
Time-Sharing vs Distributed Operating System
UNIX vs Windows Operating System
Swap-Space Management in Operating System
User View vs Hardware View vs System View in Operating System
Internal Structure of UNIX File system
Best Operating System for Programming
Disk Attachment in Operating System
Multiprocessor and Multicore System in Operating System
Resource Deadlocks vs Communication Deadlocks in Distributed Systems
What is Buddy System
Why must User Threads be mapped to Kernel Thread
Best Secure Operating System
Best UNIX Operating System
What is Hashed Page Table in Operating System
What is UEFI and How It Differ from BIOS
MacOS vs OpenBSD
Disk Operating System Commands
IPC through Shared Memory
IPC using Message Queues
Causes of Operating System Failure
IoT Operating Systems
What is VSE Operating System
Allocation of Frames in OS
Cooperating Process in OS
Page Fault Handling in OS
Client OS vs Server OS
long term Scheduler vs short term Scheduler
Best Cloud Operating Systems
Firmware vs Operating System
Linux vs Solaris
Mobile OS vs Desktop OS
FreeBSD Operating System
Tails Operating System
Best Real-Time Operating System
Disk Management in Operating System
Best books for Operating System
Implementation of Access matrix in the operating system
KaiOS Operating System
Best Alternative Operating System
Operating System Hardening
Best courses for the operating system
Business Operating System
BSD Based Operating System
Processor vs Operating System
Standalone vs Network Operating System
5 State Process Model in Operating System
Best operating system for gaming
Two State Process Model in Operating System
Best Book for Linux Operating System
Facts about Android Operating System
Facts about Windows Operating System
Best Operating System for Netbook
Best Alternative Operating System for Android
Best Operating System for Chromebook
Design approaches in Operating System
Best 32 bit Linux Operating System
Android vs Linux
physical vs logical file systems
Shared Memory vs Message Passing
Best Ubuntu-based Linux Distros
DOS vs UNIX
File Models in Distributed Operating System
AIX OS Commands
Features of Blackberry 10 OS
Contiguous and Non-Contiguous Memory Allocation in Operating System
AIX vs Linux OS
Parallel Computing vs Distributed Computing
Multilevel Queue Scheduling in Operating System
Best SSD for Operating System
Interesting Facts about the iOS Operating System
Best Terminal Operating Systems
Batch OS vs Multiprogramming OS
Real-Time os vs general-purpose os
Static and Dynamic Loading in Operating System
Arch Linux Operating System
Kylin Operating System
Parrot Operating System
HP-UX Operating System
Tizen Operating System
VxWorks Operating System
eCos Operating System
Haiku Operating System
Knoppix Operating System
Puppy Linux Operating System
AliOS Operating System
Gentoo Linux Operating System
Skyos Operating System
Best Operating System for Raspberry Pi
gOS Operating System
Edubuntu OS
Harmony OS
IRIX OS
Security vs Protection
Cold booting vs Warm booting in OS
FAT32 vs NTFS in OS
Paging vs Swapping in OS
Symmetric vs Asymmetric Multiprocessing in OS
Difference between Buffering and Caching in Operating System
Difference between Interrupt and Polling in Operating System
Difference between Multitasking and Multithreading in Operating System
Difference between System call and System Program in Operating System
Deadlock Prevention vs Deadlock Avoidance in OS
fork() vs vfork()
Coupled vs Tightly Coupled Multiprocessor System
Maskable vs Non-Maskable Interrupts
Oracle Linux vs Red Hat Enterprise Linux
Preemptive and Non-Preemptive Kernel
Difference between CentOS and Red Hat Enterprise Linux OS
Difference between Kubuntu and Debian Operating System
Difference between Preemptive and Cooperative Multitasking
Difference between Spinlock and Mutex in Operating System
Difference between Cinnamon and MATE
Difference between Device Driver and Device Controller in Operating System
Difference between Full Virtualization and Paravirtualization in Operating System
Difference between GRUB and LILO in the operating system
Difference between Virtualbox and VMware
What is a distributed shared memory? And its advantages
Difference between AIX and Solaris Operating System
Difference between Concurrency and Parallelism in Operating System
Difference between QNX and VxWorks Operating System
Difference between User level and Kernel level threads in Operating System
Nucleus Operating System
Input/Output Hardware and Input/Output Controller
Privileged and Non-Privileged Instructions in Operating System
CPU Scheduling Algorithms in Operating Systems
Mass Storage Structure in Operating Systems
N-Process Peterson Algorithm
Xv6 Operating System - Adding a New System Call
Non-Contiguous Memory Allocation in Operating System
Types of Linux OS
Operating System Structure
Operating System Examples
What is Starvation in Operating System
MCQ
Problem on Counting SemaphoreThe questions are being asked on counting semaphore in GATE. Generally the questions are very simple that contains only subtraction and addition. The following type questions can be asked in GATE. A Counting Semaphore was initialized to 12. then 10P (wait) and 4V (Signal) operations were computed on this semaphore. What is the result?Hence, the final value of counting semaphore is 6.
Next TopicBinary Semaphore or Mutex
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