Question

could you answer all of these and leave details. I will upvote thanks!

1. 1- What is CPI?

2. 2- What is the CPU execution time?

3. 3- What do KB, MB, and GB mean? Which power of 2 are they?

4. 4- What’s the difference between bit and byte?

5. 5- What is the CPU execution time for a program made of 20000 instructions and a CPI equal to 2.

   Assume the frequency of the processor is 3 GHz.

6. 6- A microprocessor has 20 bits address bus, what is the maximum size of a memory that can be

   connected to this processor if the memory cell size is 16 bits. Calculate the size of the memory in

   byte.

7. 7- How many bits are needed to address a byte-addressable memory with the size of 128 MB?

Answer 1

Answer 1) The average number of cycles required per instruction in a given process is defined as click per instruction. It is used for a professors performance. It can be defined as the multiplicative inverse of instruction per cycle.

Answer 2) The total time that a CPU executes in order to perform a given task is called the CPU execution time. It is the time time for the start of execution of a program till it's end.

Answer 3) KB means kilobytes which is a unit of memory and is equal to 1028bytes or 2¹⁰ . MB means megabytes and is a unit of memory which is equal to 1,048,576 bytes or 2²⁰ . GB means gigabytes and is a unit of memory which is equal to 2³⁰ bytes.

Answer 4) A bit is the smallest unit of measurement in a computer memory. A bit is assembled into a group of 8 to form a byte.

Answer 5)

CPU execution time = I * CPI / R

or 20000* 2/3

or 0.000133

Answer 6) The number of bytes it will support is,

2²⁰/ 2¹⁶

or, 2⁴ bits

or, 4 bytes

Answer 6) Given, the memory address space is 128mb or 2²⁷. And the word size is 8 or 2³.

Therefore we can say that we need,

2²⁷/2³

or, 2²⁴

or, 24 bits are needed to address each word.

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