IGCSE CS Week 07 Lesson 01

Open Ended

Name at least three components inside a CPU

Draw

Convert the 8-bit binary number 00001011 to its denary equivalent.

Draw

Convert the 8-bit binary number 00001101 to its denary equivalent.

Draw

Convert the denary number

64 to its 8-bit binary equivalent.

Draw

Convert the denary number

15 to its 8-bit binary equivalent.

Multiple Choice

Which component of the CPU is responsible for performing arithmetic and logical operations?

• Control Unit (CU)

• Arithmetic Logic Unit (ALU)

• Registers

• Cache

Multiple Choice

What is the main function of the Cache in the CPU?

• Decoding instructions and controlling the timing of operations

• Performing arithmetic and logical operations

• Storing data, instructions, and results of calculations

• Storing recently used data and instructions in memory that is faster to access than RAM

Categorize

Options (3)

The instruction is decoded by the Control Unit (CU).

The next instruction is fetched from RAM.

The CU sends signals to the ALU and components to execute the instruction.

Arrange the following steps in the correct sequence:

First Step

Second Step

Third Step

Multiple Choice

Which of the following best describes the “Decode” operation in the Fetch-Decode-Execute cycle?

• Causes the next instruction to be fetched from memory.

• Decodes the instruction to determine what the instruction is.

• Executes the instruction by performing the operation.

• Stores the instruction back in RAM.

Open Ended

What storage ​devices are ​used that are ​non-volatile?

Multiple Choice

Which of the following is a characteristic of a Solid State Drive (SSD)?

• Uses magnetic platters to store data

• Has mechanical moving parts for data access

• Uses non-volatile flash memory for storage

• Requires an optical laser for data read/write

Multiple Choice

Which type of storage is categorized as ‘offline secondary storage’?

• RAM

• Hard Disk Drive (HDD)

• Magnetic Tape

• ROM