3.5 CPU features

Question 1

What does a 32-bit CPU mean in terms of memory addressing?

Answer 1

It can reference up to 4 GB of memory.

This limitation is due to the maximum addressable space of 2^32 bytes.

Question 2

How much memory can a 64-bit CPU address?

Answer 2

Up to 17 billion GB (theoretical limit).

The theoretical limit is 2^64 bytes.

Question 3

Can a 64-bit OS run 32-bit applications?

Answer 3

Yes, but it requires 64-bit hardware and drivers.

This compatibility is facilitated through a subsystem in the OS.

Question 4

Can a 32-bit OS run 64-bit applications?

Answer 4

No.

32-bit operating systems cannot handle the architecture required for 64-bit applications.

Question 5

What are 32-bit and 64-bit Intel processors commonly called?

Answer 5

• 32-bit: x86
• 64-bit: x64

These terms refer to the architecture used in the processors.

Question 6

Where are 32-bit and 64-bit applications typically installed in Windows?

Answer 6

• 32-bit: “Program Files (x86)”
• 64-bit: “Program Files”

This separation helps manage compatibility and organization of applications.

Question 7

What does ARM stand for?

Answer 7

Advanced RISC Machine.

ARM architecture is known for its efficiency and is widely used in mobile devices.

Question 8

What are the advantages of ARM processors?

Answer 8

• High efficiency
• Low power usage
• Less heat generation
• Fast processing

These features make ARM processors ideal for mobile and embedded systems.

Question 9

Where are ARM processors most commonly used?

Answer 9

In mobile phones (99%) and increasingly in desktops and laptops.

Their efficiency and performance make them suitable for a variety of devices.

Question 10

What is a CPU core?

Answer 10

An individual processor within a CPU package that can execute instructions independently.

Each core can handle its own tasks, improving multitasking capabilities.

Question 11

How do multiple cores improve CPU performance?

Answer 11

Each core can run instructions simultaneously, increasing overall efficiency.

This parallel processing allows for better performance in multi-threaded applications.

Question 12

How are processors often described in terms of cores?

Answer 12

By the number of cores, e.g., 4-core, 8-core, 16-core.

The number of cores indicates the potential for parallel processing capabilities.