Question 1: Name two common types of storage devices used in computers and briefly explain one key difference between them.

Answer: Examples include Hard Disk Drive (HDD) and Solid State Drive (SSD). HDDs use magnetic storage with moving parts, while SSDs use flash memory with no moving parts. The key difference is that SSDs are faster and more durable than HDDs.

Question 2: Describe how a CD-ROM stores data. Include the physical method used to read data.

Answer: A CD-ROM stores data in the form of tiny pits and lands on its spiral track. A laser reads the data by reflecting light off the surface; changes in reflection indicate data bits.

Question 3: Identify which storage device is most suitable for storing large multimedia files and explain why.

Answer: External Hard Drives or SSDs are most suitable because they offer high storage capacity and fast data transfer speeds, making them ideal for large multimedia files.

Question 4: Complete the following truth table for an AND gate:

Answer: A | B | Output 0 | 0 | 0 0 | 1 | 0 1 | 0 | 0 1 | 1 | 1

Question 5: Complete the truth table for an OR gate:

Answer: A | B | Output 0 | 0 | 0 0 | 1 | 1 1 | 0 | 1 1 | 1 | 1

Question 6: Draw the logic circuit for an AND gate. Label all inputs and the output.

Answer: A correct sketch would show a standard AND gate symbol (D-shaped with flat side on the left), with two inputs labeled A and B entering the gate, and one output labeled 'Output'.

Question 7: Sketch a logic circuit that uses NOT, AND, and OR gates to implement the following logic: the output is true only when either A is true and B is false, or C is true.

Answer: A correct sketch would include a NOT gate connected to B, an AND gate combining A and the output of the NOT B, an OR gate combining this result with C, and the final output from the OR gate.

Question 8: Explain the purpose of a cache in a computer's storage hierarchy.

Answer: A cache stores frequently accessed data close to the processor to reduce data access time and improve overall system performance.

Question 9: Describe one advantage and one disadvantage of using a Solid State Drive (SSD) compared to a traditional Hard Disk Drive (HDD).

Answer: Advantage: SSDs are faster and more durable due to lack of moving parts. Disadvantage: SSDs are generally more expensive per gigabyte than HDDs.

Question 10: Sketch a simple diagram of a storage device that uses magnetic storage. Label the main parts involved in reading and writing data.

Answer: A basic sketch should show a magnetic disk (platters), read/write head, spindle, and a motor. The head moves over the spinning disk to read/write data magnetically.

Question 11: Explain why a USB flash drive is considered portable storage and mention one scenario where it is useful.

Answer: A USB flash drive is small, lightweight, and easily connectable to different computers, making it portable. It is useful for transferring files between different locations or devices quickly.