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After RETI instruction is executed then the pointer will move to which location in the program?
  • a)
    next interrupt of the interrupt vector table
  • b)
    next instruction of the program after the IE instruction
  • c)
    next instruction after the RETI in the memory
  • d)
    none of the mentioned
Correct answer is option 'B'. Can you explain this answer?
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After RETI instruction is executed then the pointer will move to which...
 When the RETI instruction is executed, it will execute the instruction present at the top of the stack (which is the PC’s value i.e after the interrupt enable instruction).
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After RETI instruction is executed then the pointer will move to which...
The RETI instruction

The RETI (return from interrupt) instruction is a specific instruction found in some microcontrollers and microprocessors that is used to return control from an interrupt service routine (ISR) back to the main program. This instruction is typically used in interrupt-driven systems, where the processor can be interrupted by external events or internal conditions.

Explanation of the options:
a) next interrupt of the interrupt vector table: The interrupt vector table is a table of addresses that holds the starting addresses of the interrupt service routines for each interrupt source. After executing the RETI instruction, the program counter (PC) does not automatically move to the next interrupt vector. Therefore, option a is incorrect.

b) next instruction of the program after the IE instruction:
The IE (interrupt enable) instruction is used to enable or disable interrupts in the microcontroller. After the RETI instruction is executed, the program counter (PC) will move to the next instruction in the program after the IE instruction. This is because the RETI instruction is typically used at the end of an ISR to return to the main program flow. Therefore, option b is correct.

c) next instruction after the RETI in the memory: The RETI instruction itself does not specify where the program counter (PC) should go after its execution. Therefore, option c is incorrect.

d) none of the mentioned: As explained above, option b is the correct answer.

Conclusion:
After executing the RETI instruction, the program counter (PC) will move to the next instruction of the program after the IE instruction. This is because the RETI instruction is typically used to return from an interrupt service routine (ISR) and continue the execution of the main program.
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After RETI instruction is executed then the pointer will move to which location in the program?a)next interrupt of the interrupt vector tableb)next instruction of the program after the IE instructionc)next instruction after the RETI in the memoryd)none of the mentionedCorrect answer is option 'B'. Can you explain this answer?
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After RETI instruction is executed then the pointer will move to which location in the program?a)next interrupt of the interrupt vector tableb)next instruction of the program after the IE instructionc)next instruction after the RETI in the memoryd)none of the mentionedCorrect answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about After RETI instruction is executed then the pointer will move to which location in the program?a)next interrupt of the interrupt vector tableb)next instruction of the program after the IE instructionc)next instruction after the RETI in the memoryd)none of the mentionedCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for After RETI instruction is executed then the pointer will move to which location in the program?a)next interrupt of the interrupt vector tableb)next instruction of the program after the IE instructionc)next instruction after the RETI in the memoryd)none of the mentionedCorrect answer is option 'B'. Can you explain this answer?.
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