🔹 Computer Memory

Computer memory is the storage area where data and instructions are stored. It includes short-term and long-term storage.

🔹 Data Storage Units

• Bit (0 or 1)
• 1 Byte = 8 bits
• 1 KB = 1024 Bytes
• 1 MB = 1024 KB
• 1 GB = 1024 MB
• 1 TB = 1024 GB

🔹 Types of Memory

• Primary Memory: RAM, ROM
• Secondary Memory: Hard Disk, Pen Drive, CD, DVD, etc.

🔹 RAM

RAM stores data temporarily. Data is lost when computer is turned off. It is called volatile memory.

🔹 ROM

ROM stores permanent instructions. Data is not lost when power is off. It is non-volatile memory.

🔹 Secondary Storage Devices

• Hard Disk
• SSD
• CD / DVD / Blu-ray
• Pen Drive
• Memory Card
• Cloud Storage

✏️ A. Fill in the blanks

1. Data is measured in Bytes.
2. RAM and ROM are types of internal memory.
3. Pen drive is also called Flash Drive.
4. A CD can store up to 700 MB and is 4.7 inches.

✔️ B. True or False

1. RAM stands for Random Access Memory – True
2. SSD gives high performance – True
3. Flash drive is small and rewritable – True
4. 1 MB = 1024 GB – False

🔘 C. Multiple Choice Questions

1. 0 and 1 are called Binary
2. Temporary memory is RAM
3. Blu-ray uses Blue-violet Laser
4. Data lost when off → RAM

🔗 D. Match the Following

• ROM → Internal Memory
• DVD → 4.7 GB
• Blu-ray Disc → 50 GB
• Flash Drive → Plug-and-Play Device

🧠 E. Competency Questions

1. Use Pen Drive
2. Use External Hard Disk

📝 F. Answer the Following

1. Primary Memory: Built-in memory (RAM & ROM).
2. Hard Disk: Stores large data permanently.
3. Cloud Storage Benefits: Access anywhere, backup safe.
4. Memory Card: Used in mobiles for storage.
5. RAM vs ROM: RAM temporary, ROM permanent.