Operating Systems is one of those subjects where the first few lectures can feel easy and then everything suddenly becomes calculations, queues, page faults and strange words like semaphore. You may understand what FCFS means and still get the waiting time wrong in the exam. You may know the definition of paging but freeze when a page-replacement numerical appears.
So instead of giving you a long list of famous channels, this guide matches each resource with a specific OS problem: concepts, CPU scheduling, synchronization, memory management, page replacement and semester-exam revision.
Channel and playlist availability checked on 15 September 2026.
Start here: if your main target is a B.Tech, BCA, B.E. or MCA semester exam, use one detailed channel as your main teacher and one backup only for difficult topics. For many Hindi/Hinglish learners, Gate Smashers is a practical main source. Neso Academy is a strong English option. Jenny's Lectures is useful when you want a slower explanation, while KnowledgeGATE works better when the exam is close and you need structured revision.
First Identify Why Operating Systems Feels Difficult
Saying “OS is difficult” is too broad. Before choosing a YouTube channel, find the exact place where you are losing marks. The resource you need for understanding a process state diagram is not necessarily the same resource you need for solving Round Robin or page-replacement questions.
You need diagrams and a clear explanation of process states, PCB, context switching, threads and system calls.
You need paging, segmentation, virtual memory and page replacement taught in the correct order.
You need solved examples plus enough unsolved practice for scheduling, Banker's algorithm, paging and disks.
You need syllabus filtering and revision, not another 40-hour playlist from the beginning.
Best YouTube Channels for Operating Systems
Gate Smashers
Best fit: semester preparation + OS numericals in Hindi/HinglishGate Smashers is a sensible starting point when your university syllabus mixes theory with numerical questions. The playlist covers the usual OS journey from processes and threads to CPU scheduling, synchronization, deadlocks, memory management, page replacement and disk scheduling.
What makes it useful for semester students is that you can study topic by topic rather than treating Operating Systems as one giant subject. If your Unit 2 is CPU scheduling, for example, you can learn the terminology first and then move into FCFS, SJF, Priority and Round Robin problems without completing unrelated chapters.
I would especially use it when numericals are part of the university paper. Just do not make the mistake of watching every solved example passively. After two examples, close YouTube and solve the next question on paper.
Neso Academy
Best fit: structured English learning from basics to memory managementNeso Academy is a good choice if you prefer English explanations and want Operating Systems to feel like one connected course rather than a collection of unrelated exam topics.
Its OS material moves through processes, threads, CPU scheduling, process synchronization, deadlocks, main memory, virtual memory and file systems in a structured sequence. The CPU-scheduling part also includes solved problems for algorithms such as FCFS, SJF, Priority and Round Robin.
That combination is useful because OS numericals become much easier when the terminology is already clear. If arrival time, burst time, preemption and turnaround time are still confusing, jumping directly to a solved Gantt chart usually creates more confusion.
Jenny's Lectures CS IT
Best fit: slower explanations and memory/page-replacement practiceJenny's Lectures works well for students who understand better when a topic is explained patiently rather than compressed into a short revision video.
I would keep this playlist especially for topics where a small mistake changes the entire answer. Page replacement is a good example. FIFO, LRU and Optimal look simple after watching a solved example, but students often lose marks because they stop tracking the frame state carefully.
The channel has separate explanations and examples for these algorithms, so it can be useful as a “repair resource” even if another channel is your main teacher.
KnowledgeGATE by Sanchit Sir
Best fit: fast full-syllabus revision before semester examsKnowledgeGATE becomes useful when you have already studied Operating Systems once but the subject still feels scattered. Its long semester one-shot connects process basics, CPU scheduling, synchronization, semaphores, deadlock, memory management, paging, virtual memory, disk scheduling and file systems in one flow.
This is why I see it more as a revision tool than a substitute for all detailed study. CPU scheduling practice appears inside the longer Operating Systems coverage, but if you have never solved a scheduling question yourself, a one-shot alone will not build that skill.
Use the timestamps and jump directly to your weak unit. Watching six hours from the beginning just because the video says “complete OS” is not always the best use of the final days before an exam.
IIT Bombay – Prof. Mythili Vutukuru
Best fit: students who want to understand what an OS is actually doingThis is the option I would keep for a student who is no longer satisfied with memorising “process, memory, semaphore, file system” as separate definitions.
The IIT Bombay Operating Systems material is organised around processes, virtual memory, concurrency, I/O and file systems. It also connects theory with practice problems and programming exercises. Later lectures use xv6 to show how core operating-system ideas appear inside a real teaching OS.
For a normal semester exam, you probably do not need every advanced xv6 lecture. But if your basics are already decent and you want to understand context switching, virtual memory or synchronization beyond exam definitions, this is a strong deeper-learning route.
The Numerical Drill Board: Where Students Actually Lose Marks
Operating Systems numericals do not usually require difficult mathematics. The problem is keeping the steps organised. One wrong queue position or one missed page fault can change the whole answer.
These are the four areas where I would insist on written practice before a semester exam.
OS Numerical Practice Bench
Watch the method once. Then solve the next question without the video.
CPU Scheduling
FCFS • SJF • SRTF • Priority • Round RobinWrite arrival time and burst time clearly. Draw the Gantt chart first. Then calculate completion time, turnaround time and waiting time. Do not start plugging numbers into formulas before the execution order is correct.
Banker's Algorithm
Need Matrix • Available • Safe SequenceBuild the Need matrix using Max minus Allocation. Then test processes against Available resources one by one. Write the safe sequence instead of trying to do every comparison mentally.
Page Replacement
FIFO • LRU • OptimalDraw the frames in a proper table and mark each hit or fault. In LRU, keep track of recent use carefully. In Optimal, look forward in the reference string before replacing a page.
Disk Scheduling
FCFS • SSTF • SCAN • C-SCANMark the initial head position and movement direction. Write the exact service order and calculate each movement separately. Most mistakes happen when students jump directly to the final total.
Which Channel Should You Use for Each Operating Systems Topic?
There is no rule that says your main teacher must also be your best teacher for every single OS chapter. A simple two-source system is enough.
A Better Way to Study OS: Three Passes, Not Endless Videos
If you have enough time before the exam, do not try to “finish YouTube.” Your goal is to finish the syllabus and become able to answer questions without the teacher on screen.
Learn what the OS is managing: CPU, processes, memory, files and devices. Draw process-state and memory diagrams in your own notebook.
Solve scheduling, page replacement, Banker's algorithm and disk-scheduling problems. For theory chapters, write 5-mark and 10-mark answers from memory.
Mark topics that your university repeats. Revisit only weak concepts and questions instead of replaying the full playlist.
If Your OS Exam Is Only 3 Days Away
Three days is not the time to become an operating-system researcher. It is the time to protect marks.
Finish process states, PCB, threads and scheduling. Solve at least one FCFS, SJF, Priority and Round Robin problem. Then revise critical section, semaphore and classical synchronization problems.
Complete deadlock conditions, prevention/avoidance and Banker's algorithm. Then study paging, segmentation, virtual memory and page replacement with written practice.
Cover required disk scheduling and file-system topics, then spend most of the remaining time on your university's previous papers and short-note revision.
Three OS Study Habits I Would Avoid
A solution that looks easy on screen can still go wrong when you try it alone.
Different teachers may use different notation and solving orders. That can make a simple method feel complicated.
Process states, paging, synchronization and file systems become easier to recall when you can draw their flow.
Operating Systems for B.Tech, B.E., BCA and MCA Students
The basic OS foundation remains similar across computer-science degrees: processes, threads, CPU scheduling, synchronization, deadlocks, memory management, virtual memory and file systems. The difference is usually how deep the university expects you to go and how much numerical work appears in the paper.
If you are studying engineering subjects together, the YouTube channel guide for B.E. students can help you choose resources for your other semester subjects without building a separate random channel list for every paper.
MCA students can also check the MCA subject-wise YouTube guide . Operating Systems often appears alongside subjects such as DBMS and Computer Networks, so keeping one consistent resource system is better than changing your complete study setup every week.
If your target is beyond normal semester marks, use a different level of preparation. The GATE CSE YouTube channel guide is more suitable when you need OS PYQs and deeper competitive-exam practice.
Students preparing computer-science entrance or eligibility exams can also use the CUET PG MCA preparation guide and the UGC NET Computer Science preparation guide for exam-specific resource selection.
Related guides on SahilDubey.com
Frequently Asked Questions
Which YouTube channel is best for Operating Systems?
Gate Smashers is a practical choice for many Hindi/Hinglish semester students, particularly when the syllabus contains OS numericals. Neso Academy is a strong option for students who prefer structured English explanations. The best choice depends on your syllabus, language and whether you need concepts or revision.
Which channel is best for Operating Systems numericals?
Gate Smashers and Neso Academy are useful for CPU-scheduling problems. Jenny's Lectures is helpful for step-by-step page-replacement examples. Whatever channel you use, solve fresh questions yourself because watching solved numericals is not enough.
Which channel should I use for CPU scheduling?
Gate Smashers is useful for semester-oriented CPU scheduling, while Neso Academy provides structured explanations and solved problems for algorithms such as FCFS, SJF, Priority and Round Robin.
Which YouTube channel is good for paging and memory management?
Neso Academy is useful for building memory-management concepts in sequence. Gate Smashers is practical for semester revision, while Jenny's Lectures can help when page-replacement algorithms such as FIFO, LRU and Optimal need another explanation.
Is a one-shot video enough for an Operating Systems semester exam?
A one-shot can be useful for revision, but it should not replace numerical practice. If CPU scheduling, Banker's algorithm, paging or disk scheduling is new to you, study those topics separately and solve questions before relying on a full-syllabus revision video.
How should I prepare Operating Systems in one week?
Divide the syllabus into processes and scheduling, synchronization and deadlocks, memory and virtual memory, and file/disk topics. Complete concepts first, practise all numerical areas on paper, and use the final days for university PYQs and weak-topic revision.
Should I use different channels for every OS topic?
No. Keep one primary channel for consistency. Use a second resource only when a particular topic is not clear or when you need extra numerical practice. Constantly changing teachers usually wastes study time.
Final Recommendation
If I were preparing Operating Systems for a normal semester exam, I would first open the syllabus and mark every numerical chapter. Then I would choose one main teacher instead of collecting playlists.
For Hindi/Hinglish preparation, Gate Smashers is a practical primary option. For structured English learning, Neso Academy is strong. Jenny's Lectures is useful when memory or page-replacement questions need a slower explanation. KnowledgeGATE makes more sense for quick revision, while the IIT Bombay lectures are worth using when you want to understand OS beyond exam definitions.
The final rule is simple: Operating Systems starts improving when you stop saying “I understood the video” and start checking whether you can draw the Gantt chart, find the safe sequence or count the page faults without the video running beside you.
Editorial note: YouTube playlists may be renamed, expanded or reorganised by their creators. Links and broad topic coverage were checked on 15 September 2026. Always match the videos with your own university syllabus and current previous-year papers.
