Question

1. CPUs use caches for all of the following except:

Question 1 options:

	Allowing CPU cores to share information
	Retrieving one instruction at a time
	Storing entire functions on the CPU
	Running faster than RAM

Question 2 (1 point)

Which of the following is true about CPU caching?

Question 2 options:

	There are usually only two levels of caching.
	There is usually only one level of caching.
	There are usually only four levels of caching.
	There are usually only three levels of caching.

Question 3 (1 point)

Which of the following is not a typical cache replacement policy?

Question 3 options:

	Least frequently used
	Square sigma
	First in first out
	Least recently used

Question 4 (1 point)

The effective access time is composed of all of the following except

Question 4 options:

	Number of register accesses
	Number of cache hits
	Time penalty for a cache miss
	Number of cache misses

Question 5 (1 point)

When should cache size be considered in software development?

Question 5 options:

	Design
	Requirements
	Implementation
	Deployment

Question 6 (1 point)

All programs can typically be loaded and can stay in main memory.

Question 6 options:

	True
	False

Question 7 (1 point)

The physical address for memory is determined by the

Question 7 options:

	CPU cache
	Compiler
	Operating system
	CPU

Question 8 (1 point)

Pages are

Question 8 options:

	Variable size
	Never supported with hardware
	Architecture dependent
	Fixed size

Question 9 (1 point)

How many bits are necessary to store a whether a logical address is in RAM or stored in virtual memory?

Question 9 options:

	3
	2
	0
	1

Question 10 (1 point)

Virtual memory is slower than physical memory.

Question 10 options:

	True
	False

Answer 1

1- Storing entire functions on the CPU

Cache size is not much large. So, it is difficult to store the entire function and as well as this is not the great move it will reduce the performance of the system.

2- There are usually only three levels of caching

L1 cache(primary cache), L2(secondary cache), L3(specialised memory to improve the performance of L1 and L2).

3- Square sigma

Other 3 are well known cache replacement policies

4- Number of register accesses

Formula : effective-access-time = hit-rate * cache-access-time + miss-rate * lower-level-access-time

5- Deployment

It is considered in deployment phase for increasing the performance.

6- False

No, after execution the allocated memory will be freed.

7- Operating system

It is assigned by Operating system whereas logical address is generated by CPU.

8- Fixed size

Pages are of fixed size whereas segments are of variable size.

9- 1

With one bit we can identify whether we can assign 0 for RAM and 1 for virtual memory OR 1 for RAM and 0 for virtual memory.

10- True

Because Virtual memory is the part of harddisk and physical memory is RAM.

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