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EN0-001 – ARM Accredited Engineer

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Showing 4–6 of 15 questions

Question 4

Which TWO of the following interrupt types does a Generic Interrupt Controller (GIC) support? (Choose two)

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    Interrupt from a private peripheral to a processor
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    Interrupt from a processor to a private peripheral
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    Interrupt from a shared peripheral to a processor
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    Interrupt from a processor to a shared peripheral
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    Interrupt from a private peripheral to a shared peripheral
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    Interrupt from a shared peripheral to a private peripheral
Question 5

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.

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

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    Use a do/while loop instead of a for loop
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    Change the type of sum to be an unsigned short
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    Change the type of i to be an unsigned int
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    Use signed variables instead of unsigned variables
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    Declare sum as a global variable
Question 6

In which TWO of the following locations would a compiler typically place local variables? (Choose two)

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    ROM
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    Heap
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    Cache
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    Registers
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    Stack