Multiple choice questions on Computer Memory

📚 Quick Study Guide

• 💾 RAM (Random Access Memory): Volatile memory used for active processes. Data is lost when power is off.
• ⚡ ROM (Read-Only Memory): Non-volatile memory that stores permanent instructions (like the BIOS).
• 💎 Cache Memory: Small, fast memory that stores frequently accessed data for quicker retrieval. Improves performance.
• 🧮 Memory Hierarchy: A system of organizing memory based on speed and cost (Registers -> Cache -> RAM -> Storage).
• 📏 Units of Memory:
  • Byte (B) = 8 bits
  • Kilobyte (KB) = $2^{10}$ bytes = 1024 bytes
  • Megabyte (MB) = $2^{20}$ bytes = 1024 KB
  • Gigabyte (GB) = $2^{30}$ bytes = 1024 MB
  • Terabyte (TB) = $2^{40}$ bytes = 1024 GB
• ⏱️ Access Time: The time it takes to access data from memory. Faster access time = better performance.
• 🔑 Virtual Memory: Uses a portion of the hard drive as an extension of RAM, allowing you to run programs larger than physical memory.

🧠 Practice Quiz

1. What type of memory is volatile and loses its data when power is turned off?
   1. RAM
   2. ROM
   3. Cache
   4. Hard Disk
2. Which memory is primarily used for storing the operating system and application programs that are currently running?
   1. Hard disk
   2. ROM
   3. RAM
   4. USB drive
3. What is the main purpose of cache memory?
   1. To permanently store data
   2. To increase the processing speed
   3. To store BIOS
   4. To provide virtual memory
4. Which of the following memory units represents the largest storage capacity?
   1. Gigabyte (GB)
   2. Megabyte (MB)
   3. Kilobyte (KB)
   4. Terabyte (TB)
5. What is the memory that the processor can access more rapidly than other types of memory?
   1. Main memory
   2. Cache memory
   3. Virtual memory
   4. Secondary memory
6. What is the purpose of virtual memory?
   1. To store permanent data
   2. To speed up the computer's boot process
   3. To enable the computer to run programs larger than the physical RAM
   4. To store the computer's BIOS
7. Which memory is non-volatile?
   1. SRAM
   2. DRAM
   3. ROM
   4. Cache