Computer Science Graduate, GATE Qualified, Philomath, Motivator, Singer, Actor, Loves Teaching

Ayushman Tiwari

Semaphores are the most important tool to achieve process synchronisation. They are implemented by the OS and are of two different types- Counting Semaphores and Binary Semaphores. In this course, the educator will be solving some of the best questions on them.

GATE (Graduate Aptitude Test in Engineering) 2020 & 2021 complete preparation with best educators. Know about the detailed syllabus, best books, exam pattern and dates, previous year question papers a

GATE - Iconic Pro

English

Solving Some of the Best Semaphore Questions Asked for GATE CS

Practice Questions & PYQs

Practice and Strategy

CS & IT

GATE - CSIT, DSAI & Interview Preparation

GATE, ESE and IIT-JAM

Ace the toughest competitive and government exams in India 

Test Preparation

Operating System is one of the scoring subjects in GATE CS & the only place where students really struggle is while solving Semaphore questions. I have taken some questions from GATE 2006- GATE 2014 which I believe are good & will solve them to help you build a conceptual understanding. The first question I have solved is from GATE 2006 and one of the best question I have seen in Semaphores.

GATE 2006 -1

In this lesson, I have solved a very good question from GATE 2006 which requires the understanding of Semaphores, pointers and context switching.

GATE 2006 - 2

In this lesson, I have solved a GATE 2007 question based on critical section, mutual exclusion & deadlock.

GATE 2007

In this lesson I have solved a GATE 2008 Question based on Counting Semaphore implemented using Binary Semaphores.

GATE 2008

In this lesson, I have solved a GATE 2009 question based on Synchronisation through Test and Set(X).

GATE 2009

In this lesson I have solved a GATE 2010 Question based on Binary Semaphores & it's wait() and release () operations.
Wait() operation is another name for down () operation, release() operation is another name for signal() or up() operation.

GATE 2010 - 1

In this lesson, I have solved a GATE 2010 Question based on Mutual Exclusion & Progress.

GATE 2010 - 2

In this lesson, I have solved a GATE 2013 Question on Semaphores & deadlock.
Deadlock occurs when the two or more processes are waiting for some event to happen which never happens.

GATE 2013 - 1

In this lesson, I have solved a GATE 2013 Question asked on Binary Semaphores. The question is bit difficult & can only be solved by taking preemptions in some order and I have explained them very clearly.

GATE 2013 - 2

In this lesson, I have solved a GATE 2014  Question based on Producer-Consumer Problem using Semaphores. 
semWait() is same as down() or p() operation & semSignal() is same as up() or release () operation on Semaphores.

GATE 2014

Code HELLOSONU01 | 8+ Years Teaching Exp. in GATE CS IT & GATE DS AI on Unacademy | Mentored 2 Lakh+ Students | Produced Rankers Under 500

Sweta Kumari

In this course, Sweta Kumari will give You some tips and tricks with perfect Strategy of 6 Months to Crack GATE Exam.

(Hindi)Strategy to Crack GATE CSE 2019

In this course I will cover detailed analysis of GATE CS/IT 2019 paper that was on 3rd Feb with most expected questions for GATE 2020.

(Hindi) GATE CS 2019 Exam Detailed Analysis

In this course will cover GATE CSE 2018 Solved Paper With Detailed Analysis .

(Hindi) 2018 Solved Paper with Detailed Analysis: GATE CSE

This is a crash course that will contain a lot if practice questions on important topics for GATE exam.

(Hindi)10 Days Crash Course - GATE CSE 2019

This is a 50 Days Crash Course For GATE CSE Exam  covering most important Concepts everyday with practice questions.

(Hindi) 50 Days Crash Course For GATE CSE 2019

This course includes important formulas from every section targeted for GATE exam.

Lessons

10 lessons • 1h 16m

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GATE 2006 -1

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GATE 2006 - 2

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GATE 2007

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GATE 2008

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GATE 2009

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GATE 2010 - 1

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GATE 2010 - 2

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GATE 2013 - 1

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GATE 2013 - 2

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GATE 2014