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EN0-001 Exam Dumps : ARM Accredited Engineer

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ARM Accredited Engineer Questions and Answers

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Question 1

In an ARMv7-A system, the following C function calculates a simple checksum for an input data packet of variable length. The checksum is defined to be the sum of all of the 16-bit data items in the packet modulo 65536. The parameter data_items contains the number of 2-byte data items in the packet, and it cannot be zero by design.

When using an ARM compiler, which TWO of the following optimizations could improve the performance of this code? (Choose two)

Options:

A.

Use a do/while loop instead of a for loop

B.

Change the type of sum to be an unsigned short

C.

Change the type of i to be an unsigned int

D.

Use signed variables instead of unsigned variables

E.

Declare sum as a global variable

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Question 2

Which of the following operations would count as intrusive to normal processor operation?

Options:

A.

Tracing using Embedded Trace Macrocell (ETM)

B.

Halt mode debugging

C.

Monitor mode debugging

D.

Using the Performance Monitor Unit

Question 3

Which of the following is an accurate description of network storage as compared to on-chip RAM?

Options:

A.

It has lower capacity

B.

It is quicker to access

C.

It is always available

D.

It is easy to share with other devices

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