Worksheet Solutions: Computer: Storage and Memory Device

Multiple Choice Questions (MCQs)

Q1: What is data?
(a) Organized information
(b) Unorganized facts and figures
(c) Only numbers
(d) Only pictures
Ans: (b) Unorganized facts and figures
Data includes unorganized facts like numbers, text, or symbols entered into a computer.

Q2: What is the smallest unit of data in a computer?
(a) Byte
(b) Kilobyte
(c) Bit
(d) Megabyte
Ans: (c) Bit
A bit is a single binary digit, either 0 or 1.

Q3: Which memory is temporary and gets erased when the computer is switched off?
(a) ROM
(b) RAM
(c) Hard disk
(d) CD
Ans: (b) RAM
RAM stores data only while the computer is in use.

Q4: Which device is fixed inside the computer and not easily removable?
(a) Pen Drive
(b) CD
(c) Hard Disk
(d) Memory Stick
Ans: (c) Hard Disk
Hard disk is a magnetic storage device fixed inside the computer.

Q5: Which of the following uses a blue laser to read data?
(a) DVD
(b) CD
(c) Pen drive
(d) Blu-ray Disk
Ans: (d) Blu-ray Disk
Blu-ray discs use a blue laser that stores data at high density.

Fill in the Blanks

Q1: Information is ________ data.
Ans: organized
Information is data that has been processed and organized.

Q2: A group of 8 bits is called a ________.
Ans: byte
A byte is the smallest unit of memory made of 8 bits.

Q3: ________ memory stores data permanently and is not erased when the computer is off.
Ans: ROM
ROM keeps important instructions needed for starting the computer.

Q4: A CD can store nearly ________ MB of data.
Ans: 640
CDs are round optical disks that can hold audio, video, or software.

Q5: A pen drive is also called a ________ drive.
Ans: flash
A flash drive is a small portable storage device.

True or False

Q1: Data is already processed and meaningful.
Ans: False
Data becomes meaningful only after processing.

Q2: RAM allows users to both read and write data.
Ans: True
RAM stores data temporarily and allows read and write operations.

Q3: Secondary memory keeps data safe even when the computer is turned off.
Ans: True
Secondary memory stores data for a long time.

Q4: A memory stick is used only inside the computer and cannot be removed.
Ans: False
Memory sticks are portable and used in small digital devices.

Q5: DVDs have lower storage capacity than CDs.
Ans: False
DVDs can store much more data than CDs.

Short Question Answers

Q1: What is the difference between data and information?
Ans: Data is unorganized facts and figures, while information is processed and organized data that is useful.

Q2: Why do computers need secondary memory?
Ans: Computers need secondary memory because primary memory has limited space and cannot store data for a long time.

Q3: What is RAM used for?
Ans: RAM stores data and instructions while we use a program. It works only when the computer is on.

Q4: What is ROM and why is it important?
Ans: ROM is permanent memory that stores important instructions like BIOS, which help the computer start.

Q5: What is a pen drive used for?
Ans: A pen drive is used to store data and transfer it from one computer to another.

Match the Following

Ans:
1 - (d) Temporary memory
2 - (a) Fixed magnetic storage device
3 - (e) Stores 4.7 GB to 17 GB of data
4 - (c) Uses blue laser to read data
5 - (b) Permanent memory
Explanation:

1. RAM: Temporary memory erased when the computer is off.
2. Hard Disk: Fixed inside the computer for long-term storage.
3. DVD: Optical disk with high capacity.
4. Blu-ray Disk: Read by a blue laser for high-density data storage.
5. ROM: Permanent memory with instructions needed to start the computer.