GATE CSE 2027 Operating Systems Top 25 Most Important Questions

GATE CSE 2027 Operating Systems questions on CPU scheduling, deadlock, semaphores, paging, and page replacement carry about 8 marks every year.

• Operating Systems in GATE CSE carried 7 marks in 2023, 6 marks in 2024, and 7 marks in 2025.
• The average weightage in GATE CSE for Operating Systems is 8 marks, as per the GATE CSE weightage analysis in the last 10 years.
• Questions asked from Operating Systems cover process management, scheduling, synchronization, deadlock, memory management, virtual memory, disk scheduling, and file systems.

GATE 2027 will be held on 6, 7, 13, 14, 20, and 21 February 2027, and IIT Madras is the organising institute.

An expert on the YouTube Channel named “Captain Srv” shared the top 50 questions asked in GATE CSE Operating Systems. You can go through the video below to know the top 50 Operating Systems questions asked in GATE CSE along with their solutions.

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• GATE 2027 Syllabus
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GATE CSE Question Papers PDF Download

Key Summary

• GATE 2027 CSE paper has 65 questions for 100 marks, with General Aptitude 15 marks, Engineering Mathematics 13 marks, and subject questions 72 marks.
• Operating Systems usually brings 6 to 10 marks, so it is one of the most scoring subjects in GATE CSE.
• CPU scheduling, synchronization, deadlock, paging, and page replacement give the most numerical questions.

GATE 2027 CSE Overview

GATE CSE Operating Systems Weightage: Last 3 Years

Operating Systems has stayed between 6 and 10 marks in the last ten GATE CSE papers.

• Last year, the GATE CSE question paper included 9 marks from Operating Systems.
• In 2025 and 2024, the weightage given to the Operating Systems subject in GATE CSE was 7 marks and 6 marks, respectively.
• Highest weightage given to Operating Systems in the GATE CSE question paper was 10 marks in 2019 and 2020.

GATE CSE 2027 Important Topics from Operating Systems

“In a YouTube video, “Anjali Chauhan” shared an analysis of GATE CSE subject-wise weightage. The expert also shared the important topics in the Operating Systems subject of GATE CSE based on the number of questions asked for each topic.

Important topics asked in GATE CSE Operating Systems include:

• Process Scheduling
• Page Replacement
• Synchronization
• Disk
• Resource Allocation
• Virtual Memory

You can watch the detailed video to know more about the important topics asked in GATE CSE 2027.

 

GATE CSE Operating Systems: Last Month Revision Tips

• Solve scheduling numericals daily: practise FCFS, SJF, SRTF, Round Robin, and priority with a Gantt chart.
• Memorise the formulas: keep the EAT, page table size, and inode size formulas on one sheet.
• Practise previous year questions on semaphores and deadlock, since these test logic, not recall.
• Use a timer: aim to solve each OS numerical in about 2 minutes.

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