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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 is an advantage of the single-step debug technique?

Options:

A.

It allows a complete trace of real-time program execution to be captured

B.

It reduces the number of pins required to connect the debugger to the processor

C.

It allows examination of the system state before and after execution of a statement

D.

It requires only one change to the program source code

Question 3

An Advanced SIMD intrinsic has the prototype:

uint8xl6x2_t vld2q_u8 (uint8_t const * ptr);

How many bytes does this intrinsic load from memory?

Options:

A.

2

B.

16

C.

32

D.

256

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