Where can I practice technical interview questions for free in India?

SkillVeris offers a free interview questions section with readiness scoring, so you can practice technical interview questions at no cost from anywhere in India or worldwide. Questions span AI/ML, programming, web development, DevOps, cloud and security. Combine them with Code Lab for hands-on coding practice and the AI Mentor for instant explanations whenever an answer confuses you.

How do I prepare for a coding interview if I am a complete beginner?

Start by learning one language well, then practice small problems daily before attempting interview questions. On SkillVeris you can take a free structured programming course with 24–40 lessons, write code in the in-browser Code Lab across 6 languages, and then move to the interview questions bank with readiness scoring to measure how prepared you actually are.

What is interview readiness scoring and how does it work?

Interview readiness scoring measures how prepared you are for a technical interview based on your performance across practice questions. On SkillVeris, as you answer interview questions, your readiness score updates so you can see weak topics before the real interview. It turns vague confidence into a concrete signal, telling you which areas need more revision and which are already strong.

How long does it take to get interview ready for a developer job?

Most beginners need a few months of consistent practice to feel interview ready, though timelines vary with background and daily study time. A practical route is finishing a structured SkillVeris course, which includes 24–40 lessons, module assessments and a final exam at an 80 percent pass mark, then drilling the free interview questions until your readiness score is consistently strong.

What are the most common technical interview topics for freshers?

Freshers are commonly tested on programming fundamentals, data structures, problem solving, databases, and basics of the role's stack such as web development or cloud. SkillVeris covers these through 37 free courses, a glossary of around 2,000 terms for quick definitions, cheat sheets for revision, and interview questions with readiness scoring so you can practise exactly what interviewers usually ask.

Can I practice coding interview prep without installing anything?

Yes, SkillVeris Code Lab runs entirely in your browser, so you can practice coding interview prep without installing compilers or editors. It supports 6 languages across 15 categories of exercises. Pair Code Lab sessions with the interview questions bank and readiness scoring, and you have a complete free preparation setup that works on any machine with an internet connection.

How do I explain technical concepts clearly in an interview?

Practice explaining each concept through a simple analogy first, then add the technical detail, because interviewers value clarity over jargon. SkillVeris teaches with its Learn Through Hobbies method, explaining concepts through cricket, music, gaming, cooking and eight more domains. Learning a topic through an analogy gives you a ready-made, memorable way to explain it when an interviewer asks.

Are there free mock interview resources for software engineers?

SkillVeris provides free interview questions with readiness scoring, which works like a self-paced mock interview you can repeat any time. You answer real-style technical questions, get scored, and see where you stand. The AI Mentor is available 24/7 to explain any answer at Quick, Detailed or Deep-dive depth, acting like an always-available interviewer who never gets tired.

How should I prepare for an AI or machine learning interview?

Cover ML fundamentals, Python, and modern topics like LLMs and RAG, then practise explaining projects clearly. SkillVeris has free AI/ML courses including Python for AI and ML, Large Language Models and Retrieval-Augmented Generation, each with 24–40 lessons and assessments. After finishing, use the interview questions bank and readiness scoring to confirm you can answer under pressure.

What should I revise the night before a technical interview?

Revise concise summaries rather than learning anything new: core definitions, common patterns, and your own project stories. SkillVeris cheat sheets and study notes are built exactly for this kind of quick revision, and the glossary of around 2,000 terms lets you verify any definition fast. A short readiness-score check on the interview questions bank confirms nothing critical is shaky.

How do I prepare for a DevOps interview with no work experience?

Build demonstrable knowledge through structured learning and hands-on practice, since you cannot point to job experience. SkillVeris offers free DevOps, Docker and Kubernetes related courses within its 37-course catalog and a DevOps Engineer learning path. Complete the courses, earn certificates by passing the final exams, then use the interview questions section to rehearse common DevOps scenarios.

Do certificates help in clearing technical interviews?

Certificates alone do not clear interviews, but they signal structured learning and give interviewers a starting point for questions. SkillVeris awards certificates when you pass a course final exam at 80 percent, after 24–40 lessons and module assessments, so the certificate reflects genuine effort. Pair it with practised interview answers and Code Lab projects to make a stronger impression.

How can I improve my problem solving speed for coding interviews?

Speed comes from repetition on progressively harder problems, not from rushing. Practise daily in SkillVeris Code Lab, which offers in-browser coding in 6 languages across 15 categories, and time yourself on interview questions. Review every mistake with the AI Mentor, which explains solutions 24/7 at Quick, Detailed or Deep-dive depth, so each session genuinely improves your pattern recognition.

What questions are asked in a Python technical interview?

Python interviews typically cover data types, functions, comprehensions, OOP, error handling and libraries relevant to the role, such as ML packages for AI positions. SkillVeris interview questions include Python topics, and its free Python for AI and ML course builds the underlying knowledge across 24–40 lessons. Readiness scoring then shows whether your Python answers are interview grade.

How do I handle interview questions I don't know the answer to?

Say what you do know, reason aloud toward an approach, and be honest about the gap, because interviewers value thinking over bluffing. Reduce how often this happens by broadening fundamentals: SkillVeris study notes, cheat sheets and the roughly 2,000-term glossary fill knowledge gaps quickly, and readiness scoring highlights weak areas before an interviewer ever finds them.

Is there a free way to check my interview readiness before applying for jobs?

Yes, SkillVeris interview questions come with readiness scoring, all completely free, so you can measure preparation before applying. Once your score looks solid, browse the SkillVeris Jobs page, which aggregates live roles across India, UK, USA, Germany and Remote with salary and experience filters, and apply knowing your technical preparation has been objectively tested.

How do I prepare for web developer interview questions?

Focus on JavaScript fundamentals, your framework of choice, HTTP basics, and building things you can discuss. SkillVeris offers free web development courses among its 37-course catalog, plus a Full Stack Java Developer learning path. After the courses, drill the interview questions bank, practise coding tasks in Code Lab, and use readiness scoring to verify you cover typical frontend and backend topics.

Can the AI Mentor help me practice interview answers?

Yes, the SkillVeris AI Mentor answers questions 24/7 and can explain any concept at Quick, Detailed or Deep-dive depth, which makes it useful for rehearsing interview explanations. Ask it to clarify a topic, then try explaining it back in your own words. Combined with the interview questions bank and readiness scoring, it becomes a free, always-available practice partner.

What is the best free platform for technical interview prep in 2026?

SkillVeris is a strong free option because it combines structured learning with dedicated interview preparation in one place. You get 37 free courses, interview questions with readiness scoring, an in-browser Code Lab for hands-on practice, cheat sheets and study notes for revision, and a 24/7 AI Mentor. Everything is free, which matters for learners in India and worldwide.

How do I stay calm and confident during a technical interview?

Confidence comes from evidence of preparation, so build that evidence deliberately. Complete a SkillVeris course, pass its final exam at the 80 percent bar, and watch your readiness score climb on the interview questions bank. Knowing you have explained concepts through analogies, coded in Code Lab, and scored well on practice questions gives you genuine, grounded calm on the day.

Operating Systems Interview Questions

Processes, threads, scheduling, deadlocks, memory management and more.

234 questions

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1. Difference Between Process and Thread
easyProcesses & Threads 5 mins
2. What is a Deadlock?
mediumConcurrency & Synchronization 6 mins
3. Difference Between Paging and Segmentation
mediumMemory Management 6 mins
4. What is a Semaphore?
mediumConcurrency & Synchronization 6 mins
5. What is a Context Switch?
mediumProcesses & Threads 5 mins
6. What is Virtual Memory?
mediumMemory Management 6 mins
7. Difference Between Mutex and Semaphore
mediumConcurrency & Synchronization 6 mins
8. What is CPU Scheduling?
mediumProcess Scheduling 6 mins
9. What is Thrashing in Operating Systems?
mediumMemory Management 6 mins
10. What is a Page Fault?
mediumMemory Management 5 mins
11. Preemptive vs Non-Preemptive Scheduling
mediumCPU Scheduling 5 mins
12. What is a Race Condition?
mediumConcurrency & Synchronization 5 mins
13. What is the Critical Section Problem?
mediumConcurrency & Synchronization 5 mins
14. What is a System Call?
easyKernel & System Architecture 5 mins
15. What is Demand Paging?
mediumMemory Management 5 mins
16. What is a Zombie Process?
easyProcesses & Threads 4 mins
17. What is Inter-Process Communication (IPC)?
mediumProcesses & Threads 6 mins
18. What is the Producer-Consumer Problem?
mediumConcurrency & Synchronization 6 mins
19. What is an Interrupt?
easyCPU & Process Scheduling 5 mins
20. What Is Fragmentation?
mediumMemory Management 5 mins
21. What Is a File System?
easyFile Systems 4 mins
22. Kernel Mode vs User Mode
mediumProcess Management 5 mins
23. What Is Round Robin Scheduling?
easyCPU Scheduling 4 mins
24. What Is a Monitor in OS?
mediumSynchronization 5 mins
25. What is First-Come-First-Served (FCFS) Scheduling?
easyProcess Scheduling 5 mins
26. What is Shortest-Job-First (SJF) Scheduling?
mediumProcess Scheduling 6 mins
27. What is Shortest-Remaining-Time-First (SRTF) Scheduling?
mediumProcess Scheduling 6 mins
28. What is Priority Scheduling?
mediumProcess Scheduling 6 mins
29. What is Multilevel Queue Scheduling?
hardProcess Scheduling 6 mins
30. What is Multilevel Feedback Queue Scheduling?
hardProcess Scheduling 6 mins
31. What is Lottery Scheduling?
mediumProcess Scheduling 5 mins
32. What is the Completely Fair Scheduler (CFS)?
hardProcess Scheduling 6 mins
33. What is Earliest Deadline First (EDF) Scheduling?
hardReal-Time Scheduling 6 mins
34. Round Robin vs Priority Scheduling: What is the Difference?
mediumProcess Scheduling 5 mins
35. What Is the Banker’s Algorithm?
hardDeadlock Handling 6 mins
36. What Is Deadlock Prevention?
mediumDeadlock Handling 5 mins
37. What Is Deadlock Avoidance?
hardDeadlock Handling 6 mins
38. What Is Deadlock Detection?
mediumDeadlock Handling 5 mins
39. What Is a Resource-Allocation Graph?
mediumDeadlock Handling 5 mins
40. How Does Deadlock Recovery Work?
mediumDeadlocks 6 mins
41. What Are the Necessary Conditions for Deadlock?
mediumDeadlocks 6 mins
42. Deadlock vs Starvation: What Is the Difference?
mediumDeadlocks 6 mins
43. What Is the Circular Wait Condition in Deadlock?
mediumDeadlocks 6 mins
44. What Is the Hold and Wait Condition in Deadlock?
mediumDeadlocks 6 mins
45. What is the LRU Page Replacement Algorithm?
mediumPage Replacement 6 mins
46. What is the FIFO Page Replacement Algorithm?
easyPage Replacement 5 mins
47. What is the Optimal (OPT/Belady’s) Page Replacement Algorithm?
mediumPage Replacement 6 mins
48. What is the Clock (Second-Chance) Page Replacement Algorithm?
mediumPage Replacement 6 mins
49. What is the LFU Page Replacement Algorithm?
mediumPage Replacement 6 mins
50. What is Belady’s Anomaly?
mediumPage Replacement 6 mins
51. What is a Translation Lookaside Buffer (TLB)?
mediumMemory Management 6 mins
52. What is the Structure of a Page Table?
mediumMemory Management 6 mins
53. What is a Multilevel Page Table?
hardMemory Management 6 mins
54. What is an Inverted Page Table?
hardMemory Management 6 mins
55. What are Memory-Mapped Files?
mediumMemory Management 6 mins
56. What is Copy-on-Write (COW)?
mediumMemory Management 6 mins
57. What is Swapping in Operating Systems?
mediumMemory Management 6 mins
58. What is the Working Set Model?
hardMemory Management 6 mins
59. What is Segmentation with Paging?
hardMemory Management 6 mins
60. What is the Buddy System for Memory Allocation?
mediumMemory Management 6 mins
61. What is the Slab Allocator?
hardMemory Management 6 mins
62. Internal vs External Fragmentation
easyMemory Management 5 mins
63. What is Memory Compaction?
mediumMemory Management 6 mins
64. What is Contiguous Memory Allocation?
easyMemory Management 5 mins
65. Peterson’s Solution for Mutual Exclusion
mediumConcurrency & Synchronization 5 mins
66. What is the Test-and-Set Instruction?
mediumConcurrency & Synchronization 5 mins
67. What is a Spinlock?
mediumConcurrency & Synchronization 5 mins
68. The Readers-Writers Problem Explained
mediumConcurrency & Synchronization 6 mins
69. The Dining Philosophers Problem Explained
hardConcurrency & Synchronization 6 mins
70. What is the Sleeping Barber Problem?
mediumConcurrency & Synchronization 6 mins
71. What is a Condition Variable?
mediumConcurrency & Synchronization 6 mins
72. What is Priority Inversion?
hardProcess Scheduling 6 mins
73. What is a Livelock?
mediumConcurrency & Synchronization 5 mins
74. What is Barrier Synchronization?
mediumConcurrency & Synchronization 5 mins
75. What is the Compare-and-Swap (CAS) Instruction?
hardConcurrency & Synchronization 6 mins
76. How is a Mutex Lock Actually Implemented?
hardConcurrency & Synchronization 6 mins
77. What is Busy Waiting and Why is it Costly?
mediumConcurrency & Synchronization 5 mins
78. What Are Atomic Operations in an Operating System?
mediumConcurrency & Synchronization 5 mins
79. Overview of Synchronization Primitives: Mutex, Semaphore, Condition Variable, Spinlock
mediumConcurrency & Synchronization 6 mins
80. What Does the fork() System Call Do?
mediumProcess Management 5 mins
81. What Does the exec() Family of System Calls Do?
mediumProcess Management 5 mins
82. What Does the wait() System Call Do?
mediumProcess Management 5 mins
83. What is an Orphan Process?
easyProcess Management 4 mins
84. What is a Daemon Process?
mediumProcess Management 5 mins
85. What is a Thread Pool and Why Use One?
mediumConcurrency & Synchronization 5 mins
86. User-Level Threads vs Kernel-Level Threads
mediumProcesses & Threads 6 mins
87. Explain the Three Multithreading Models (1:1, N:1, M:N)
hardProcesses & Threads 6 mins
88. How Does Thread Scheduling Work?
mediumProcess Scheduling 6 mins
89. What is a Process Control Block (PCB)?
easyProcesses & Threads 5 mins
90. What are the Different Process States in an OS?
easyProcesses & Threads 5 mins
91. What Causes Context Switch Overhead and How Is It Reduced?
mediumProcesses & Threads 6 mins
92. How Does Process Creation and the Process Hierarchy Work?
mediumProcesses & Threads 6 mins
93. How Does Process Termination Work in an OS?
mediumProcesses & Threads 6 mins
94. CPU-Bound vs I/O-Bound Processes: What Is the Difference?
mediumProcess Scheduling 6 mins
95. What are Pipes in Operating Systems?
mediumInter-Process Communication 5 mins
96. What is a Named Pipe (FIFO)?
mediumInter-Process Communication 5 mins
97. What is Message Passing in Operating Systems?
mediumInter-Process Communication 6 mins
98. What is Shared Memory IPC?
mediumInter-Process Communication 6 mins
99. What are Sockets as an IPC Mechanism?
mediumInter-Process Communication 6 mins
100. What Are Signals in an Operating System?
mediumInter-Process Communication 6 mins
101. Compare Different IPC Mechanisms (Pipes, Shared Memory, Message Queues)
mediumInter-Process Communication 6 mins
102. What is a Remote Procedure Call (RPC)?
mediumInter-Process Communication 6 mins
103. What is Mailbox-Based (Message-Passing) Communication?
mediumInter-Process Communication 6 mins
104. Why Does IPC Require Synchronization?
mediumInter-Process Communication 6 mins
105. What is an Inode and What Does It Store?
mediumFile Systems 6 mins
106. What is the FAT File System and How Does It Work?
easyFile Systems 5 mins
107. What is NTFS and How Does It Improve on FAT?
mediumFile Systems 6 mins
108. What is ext4 and What Improvements Does It Bring?
mediumFile Systems 6 mins
109. What is Journaling in a File System and Why Does It Matter?
mediumFile Systems 6 mins
110. What are File Allocation Methods in an OS?
mediumFile Systems 6 mins
111. What are Directory Structure Types in an OS?
mediumFile Systems 6 mins
112. What is FCFS Disk Scheduling?
easyDisk Scheduling 5 mins
113. What is SSTF Disk Scheduling?
mediumDisk Scheduling 6 mins
114. What is SCAN Disk Scheduling?
mediumDisk Scheduling 6 mins
115. What is the C-SCAN Disk Scheduling Algorithm?
mediumDisk Scheduling 6 mins
116. What is the LOOK Disk Scheduling Algorithm?
mediumDisk Scheduling 6 mins
117. What are RAID Levels and How Do They Differ?
mediumStorage & File Systems 6 mins
118. What is Disk Partitioning and Why is it Used?
easyStorage & File Systems 5 mins
119. What is File System Mounting?
mediumStorage & File Systems 6 mins
120. What is Direct Memory Access (DMA)?
mediumI/O Management 5 mins
121. Polling vs Interrupt-Driven I/O: What Is the Difference?
mediumI/O Management 5 mins
122. What is Spooling in Operating Systems?
mediumI/O Management 5 mins
123. What is a Device Driver and Why Does an OS Need One?
easyI/O Management 4 mins
124. What is I/O Buffering and Why Is It Needed?
mediumI/O Management 5 mins
125. What Are the Stages of the Boot Process?
mediumBoot & Startup 6 mins
126. BIOS vs UEFI: What Is the Difference?
easyBoot & Startup 5 mins
127. What Is a Bootloader and What Does It Do?
easyBoot & Startup 5 mins
128. What Are the Types of Hypervisors?
mediumVirtualization 6 mins
129. Containers vs VMs: How Do They Differ at the OS Level?
mediumVirtualization 6 mins
130. What is a Real-Time Operating System (RTOS)?
mediumReal-Time & Embedded Systems 6 mins
131. Microkernel vs Monolithic Kernel: Key Differences
mediumKernel Architecture 6 mins
132. What Are the Types of System Calls?
mediumSystem Calls & Kernel Interface 6 mins
133. What is Cache Coherence in Multiprocessor Systems?
hardMultiprocessing & Memory Systems 6 mins
134. What is a Hybrid Kernel Architecture?
mediumKernel Architecture 6 mins
135. What is an Exokernel Architecture?
hardKernel Design 6 mins
136. What is the Layered Approach to OS Structure?
mediumKernel Design 5 mins
137. What is a Virtual Machine Monitor (Hypervisor)?
mediumVirtualization 6 mins
138. What is Paravirtualization?
hardVirtualization 6 mins
139. What is Full Virtualization?
mediumVirtualization 6 mins
140. What is Turnaround Time in CPU Scheduling?
easyProcess Scheduling 5 mins
141. Waiting Time vs Response Time in Scheduling
mediumProcess Scheduling 6 mins
142. What is Throughput in Operating Systems?
easyProcess Scheduling 5 mins
143. What is the Convoy Effect in CPU Scheduling?
mediumProcess Scheduling 6 mins
144. What is Starvation in CPU Scheduling?
mediumProcess Scheduling 6 mins
145. What is Gang Scheduling?
hardMultiprocessor Scheduling 6 mins
146. Cooperative vs Preemptive Multitasking
mediumProcess Scheduling 5 mins
147. What is Rate Monotonic Scheduling?
hardReal-Time Scheduling 6 mins
148. What is Aging in CPU Scheduling?
mediumProcess Scheduling 5 mins
149. What is Dispatcher Latency?
hardProcess Scheduling 6 mins
150. What is the Memory Hierarchy in a Computer System?
easyMemory Management 5 mins
151. What are Cache Memory Mapping Techniques?
mediumMemory Management 6 mins
152. What is Associative Memory (Content-Addressable Memory)?
mediumMemory Management 5 mins
153. What is the Dirty Bit in Paging?
mediumMemory Management 5 mins
154. What is the Reference Bit in Paging?
mediumMemory Management 5 mins
155. What is Pure Demand Paging?
mediumMemory Management 5 mins
156. What is Prepaging?
mediumMemory Management 5 mins
157. What are the Tradeoffs of Page Size?
mediumMemory Management 6 mins
158. What are Memory Protection Mechanisms?
mediumMemory Management 6 mins
159. What is Address Binding?
mediumMemory Management 6 mins
160. Logical vs Physical Address in Operating Systems
mediumMemory Management 5 mins
161. Dynamic Linking vs Static Linking
mediumProgram Loading & Linking 6 mins
162. What is the Overlay Technique in Memory Management?
mediumMemory Management 5 mins
163. What is Relocation in Memory Management?
mediumMemory Management 5 mins
164. Memory Allocation Strategies: First Fit, Best Fit, Worst Fit
mediumMemory Management 6 mins
165. First Fit vs Best Fit vs Worst Fit Memory Allocation
mediumMemory Management 6 mins
166. What Causes External Fragmentation and How Is It Solved?
mediumMemory Management 6 mins
167. How Do Threads and Processes Differ in Memory Sharing?
mediumProcesses & Threads 6 mins
168. How Are Kernel Threads Implemented and Scheduled?
hardProcesses & Threads 6 mins
169. What Are Green Threads and How Do They Differ From Kernel Threads?
mediumProcesses & Threads 6 mins
170. What is a Light-Weight Process (LWP)?
mediumProcesses & Threads 5 mins
171. What Hardware Support Exists for Process Synchronization?
hardConcurrency & Synchronization 6 mins
172. How is a Mutex Implemented Internally?
hardConcurrency & Synchronization 6 mins
173. How is a Semaphore Implemented Internally?
hardConcurrency & Synchronization 6 mins
174. Binary Semaphore vs Counting Semaphore
mediumConcurrency & Synchronization 5 mins
175. What Are the Basic Security Mechanisms in an Operating System?
mediumOS Security 5 mins
176. What Are Access Control Lists (ACLs) in an Operating System?
mediumOS Security 5 mins
177. What Is Capability-Based Security in an Operating System?
hardOS Security 6 mins
178. What Are Protection Rings in an Operating System?
mediumOS Security 5 mins
179. What Is the System Call Interface in an Operating System?
mediumOS Security 6 mins
180. Trap vs Interrupt: What Is the Difference?
mediumInterrupts & Traps 6 mins
181. How Does Interrupt Handling Work in an OS?
mediumInterrupts & Traps 6 mins
182. What is an Interrupt Vector Table?
mediumInterrupts & Traps 5 mins
183. What is a Software Interrupt?
easyInterrupts & Traps 5 mins
184. What Are Nested Interrupts and How Are They Handled?
hardInterrupts & Traps 6 mins
185. What are DMA Controller Modes?
mediumI/O Systems 5 mins
186. Memory-Mapped I/O vs Port-Mapped I/O
mediumI/O Systems 6 mins
187. What are I/O Scheduling Strategies?
mediumI/O Systems 6 mins
188. What are the Basics of Disk Structure?
easyStorage Systems 5 mins
189. SSD Scheduling Considerations vs Hard Disks
hardStorage Systems 6 mins
190. What is File System Consistency Checking (fsck)?
mediumFile Systems 6 mins
191. What is a Log-Structured File System?
hardFile Systems 6 mins
192. What is a Distributed File System?
mediumFile Systems 6 mins
193. What is NFS (Network File System)?
mediumFile Systems 6 mins
194. What is the Virtual File System (VFS) Layer?
mediumFile Systems 6 mins
195. What are Linux Namespaces and OS-Level Virtualization?
mediumVirtualization & Containers 6 mins
196. What are Control Groups (cgroups) and How Do They Limit Resources?
mediumVirtualization & Containers 6 mins
197. What are OS Sandboxing Techniques and How Do They Work?
hardSecurity & Isolation 6 mins
198. What is a chroot Jail and What Are Its Limitations?
mediumSecurity & Isolation 5 mins
199. What is Linux Capability Dropping and Why Does It Matter?
hardSecurity & Isolation 6 mins
200. What is Load Balancing in a Multiprocessor OS?
mediumMultiprocessor Scheduling 6 mins
201. Symmetric vs Asymmetric Multiprocessing (SMP vs AMP)
mediumMultiprocessor Scheduling 6 mins
202. What is NUMA Architecture?
hardMemory Management 6 mins
203. What is Processor Affinity?
mediumMultiprocessor Scheduling 5 mins
204. What Are the Key Challenges in Multicore Scheduling?
hardMultiprocessor Scheduling 6 mins
205. How Does Clock Synchronization Work in a Distributed OS?
hardDistributed Systems 6 mins
206. How Does Distributed Mutual Exclusion Work?
hardDistributed Systems 6 mins
207. How Is Deadlock Detected in a Distributed System?
hardDistributed Systems 6 mins
208. What Is Consensus in Distributed Systems?
hardDistributed Systems 6 mins
209. What Is a Distributed Operating System?
mediumDistributed Systems 6 mins
210. What is Energy-Aware Scheduling in an OS?
hardPower-Aware Systems 6 mins
211. What is DVFS (Dynamic Voltage and Frequency Scaling)?
hardPower-Aware Systems 6 mins
212. How Does an OS Support GPU Computing?
hardDevice & Resource Management 6 mins
213. What is a Unikernel and How Does it Differ from a Traditional OS?
hardOS Architecture 6 mins
214. What Makes Embedded OS Design Different from a General-Purpose OS?
hardOS Architecture 6 mins
215. What is a File Descriptor Table?
mediumFile Systems 6 mins
216. What is the Open File Table?
mediumFile Systems 6 mins
217. What is the Buffer Cache in an Operating System?
mediumI/O & Storage 6 mins
218. Page Cache vs Buffer Cache: What Is the Difference?
mediumI/O & Storage 6 mins
219. What Does the mmap() System Call Do?
hardMemory Management 6 mins
220. What Are the Process Scheduling Queues in an OS?
mediumProcess Scheduling 5 mins
221. Long-Term vs Short-Term Scheduler: What Is the Difference?
mediumProcess Scheduling 5 mins
222. What Is the Medium-Term Scheduler and How Does Swapping Work?
mediumProcess Scheduling 5 mins
223. What Metrics Are Used to Evaluate a CPU Scheduling Algorithm?
mediumProcess Scheduling 6 mins
224. Context Switch vs Mode Switch: What Is the Difference?
mediumProcesses & Threads 5 mins
225. What Is the Difference Between a Process and a Thread?
easyProcesses & Threads 5 mins
226. What Is Paging in Operating Systems?
easyMemory Management 5 mins
227. What Is Context Switching in an Operating System?
easyProcesses & Threads 5 mins
228. What Are the Main Process Scheduling Algorithms?
easyCPU Scheduling 6 mins
229. What Is a Mutex and How Does It Prevent Race Conditions?
mediumSynchronization 6 mins
230. What Is Spooling and How Does It Work?
hardI/O Management 7 mins
231. What Is Starvation in Operating Systems?
hardCPU Scheduling 6 mins
232. What Is DMA (Direct Memory Access)?
hardI/O Management 7 mins
233. What Is a Bootloader and How Does It Start an OS?
hardSystem Startup 7 mins
234. What Is the Difference Between Multithreading and Multiprocessing?
hardConcurrency 7 mins

Operating Systems Interview Questions

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