EN0-001 ARM Accredited Engineer exact Exam Questions

ARM Accredited Engineer

Last Update 11 hours ago Total Questions : 210

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Question # 1

What is the maximum value of the immediate field in an ARM SVC instruction?

0x0

0xF

0xFF

0xFFFFFF

Question # 2

When the processor is executing in Thumb state, which of the following statements is correct about the values stored in R15?

Bits[31:16] are duplicated with bits[15:0]

The PC value is stored in bits[31:1] and bit[0] is treated as zero

The PC value is stored in bits[31:16] and bits[15:0] are undefined

The PC value is stored in bits[15:0] and bits[31:16] are undefined

Question # 3

A development board is supplied with a Board Support Package (BSP) for a particular operating system. Which TWO of these items would you expect to find in the BSP? (Choose two)

Power supply and electrical cables

Debugging hardware and software solution

System on chip peripheral driver source code

Boundary scan protocol definition

Boot code for board-specific devices

Question # 4

An application contains three calls to an external function, foobar(), which is defined in a shared (or dynamic) library. How many copies of foobar() will the linker place in the application image?

(Ignore linker inlining)

None

Always one

Always three

One or more depending on optimization level

Question # 5

In a symmetric multi-processing (SMP) software architecture, which of the following pairs of statements are TRUE? (Select the option in which BOTH statements are TRUE).

The roles of individual cores are determined dynamically. Each core has its own set of external peripherals.

Each core has the same view of memory and shared peripherals. Any user application, process or task can be scheduled to run on any core.

The roles of individual cores are statically determined by the system designer. Hardware must be implemented to provide cache coherency between the cores.

Each core has the same view of memory and peripherals. The roles of individual cores are statically determined by the system designer.

Question # 6

The effect of clicking the Stop button in a debugger is to:

Put the processor(s) into debug state.

Force the processor to execute a BKPT instruction

Hold the processor in a Reset condition

Re-initialize the memory contents.

Question # 7

If the performance of an application remains unchanged when the core clock speed of a Cortex-A9 processor is reduced, what can you deduce about the system?

The Clocks Per Instruction (CPI) of the processor has increased

The processor is NOT the limiting factor on performance

Instruction cache utilization has improved

The core has stopped carrying out speculative data memory accesses

Question # 8

A software profiling tool records the address held in the Program Counter (PC) every 1 ms. The software function that resides at each recorded address can be determined by the profiling tool. The percentage of time spent in each function is calculated from the percentage of recorded addresses where each function is resident.

Which one of the following statements is FALSE?

The tool shows an estimate of the percentage of time spent in each function

The tool identifies all functions executed by the application

The function with the highest percentage is a good candidate for optimization

The results will be more accurate on a processor running at 250 MHz. than one running at 2 GHz