GATE 2001
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Question 10
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Suppose a processor does not have any stack pointer register. Which of the following statements is true?
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It cannot have subroutine call instruction
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It can have subroutine call instruction, but no nested subroutine calls
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Nested subroutine calls are possible, but interrupts are not
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All sequences of subroutine calls and also interrupts are possible
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Question 10 Explanation:
If stack pointer register is not available then activation records in the stack cannot be created. So it cannot have subroutine call instruction.
Correct Answer: A
Question 10 Explanation:
If stack pointer register is not available then activation records in the stack cannot be created. So it cannot have subroutine call instruction.
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