AKTU Operating Systems: Unit 4

An Interactive Study Guide for Memory Management

🧠 Core Concepts & Definitions

Key Term Flashcards

Click on a card to flip it and reveal the definition. This will help you memorize the foundational concepts.

⚙️ Page Replacement Algorithm Simulator

Enter a reference string and the number of frames to see how different page replacement algorithms perform. This is a crucial topic for your exams!

🧩 Fragmentation Visualizer

Internal Fragmentation

Occurs in fixed-size partition schemes when a process is smaller than the partition it's allocated. The leftover space *inside* the partition is wasted.

Partition (50KB)
Process (30KB)
Wasted (20KB)

External Fragmentation

Occurs in dynamic-size partition schemes. Free memory gets broken into small, non-contiguous blocks. Total free space may be enough, but it's not usable.

Total Memory
P1
Free
P2
Free
P3

A new process might not fit, even if total free space is sufficient.

⏱️ Effective Access Time (EAT) Calculator

Calculate the performance of a demand-paged memory system. Based on PYQ models, this helps you understand the impact of TLB hits and page faults.

🎓 AKTU Exam Prep Center

Generate a random practice question based on the analysis of previous year question papers. Test your knowledge under exam-like conditions.