1.1 OCR CPU Architecture Quiz

What is the primary function of the CPU?

• To store data

• To process data and execute instructions

• To manage input/output devices

• To provide network connectivity

Which component of the CPU performs arithmetic and logical operations?

• Control Unit

• Immediate Access Store (IAS)

• Arithmetic and Logic Unit (ALU)

• Program Counter

What is the role of the Control Unit (CU) in the CPU?

• To perform mathematical calculations

• To store data and instructions

• To manage hardware, input/output signals, and the Fetch-Decode-Execute cycle

• To provide fast data access

Which of the following describes the **Fetch** stage of the Fetch-Decode-Execute cycle?

• Performing operations on data

• Interpreting instructions

• Retrieving data and instructions from RAM

• Storing results in memory

What is the purpose of the Immediate Access Store (IAS) or Cache memory in the CPU?

• To store all programs and data

• To provide a constant supply of data to the ALU, faster than RAM

• To manage input and output signals

• To execute complex mathematical functions

Which bus is responsible for transmitting the memory address from which data is to be fetched?

• Data Bus

• Address Bus

• Control Bus

• System Bus

In the Von Neumann architecture, what is the role of the Memory Address Register (MAR)?

• Stores the data being transferred between CPU and memory

• Stores the instruction currently being executed

• Holds the address of the memory location to be accessed

• Stores the results of calculations

What is an instruction set in the context of CPU architecture?

• A set of data values used for calculations

• A list of instructions that the CPU can understand and execute

• A group of registers used for temporary storage

• A series of memory addresses for storing data

How does increasing the number of cores in a CPU typically affect performance?

• It always doubles the processing speed

• It allows for parallel processing and multitasking, but performance depends on software optimisation

• It reduces the clock speed of the CPU

• It decreases the cache size

Which of the following is a key characteristic of an embedded system?

• General-purpose computing

• Separate, upgradable components

• Specific-task orientation with integrated components on a single circuit board

• High-end, easily replaceable hardware