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What do HAL stand for?

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What do HAL stand for?

(a) hardware abstraction layer

(b) hardware address layer

(c) hardware access layer

(d) hardware address lead

I had been asked this question during an interview.

Question is taken from Characteristics of Windows NT in division Real Time Operating systems of Embedded Systems

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Right option is (a) hardware abstraction layer

For explanation: The HAL is the hardware abstraction layer. This provides the portability across the multiprocessor and different platforms.

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