Limitations of execution of instructions, Computer Engineering

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Q. Limitations of execution of instructions?

1. Size of memory shown in 16 words while instruction is capable of addressing 210 =1 K words of Memory. However why 210 since 10 bits are reserved for address in machine instruction format.

2. Instructions shown are sequential in nature but a machine instruction may also be a branch instruction which causes change in sequence of instruction execution.

3. When does CPU stop executing a program? A program execution is usually finished at the end of a program or else it can be terminated because of an error in program execution or sometimes all running programs will be terminated because of catastrophic failures like power failure.


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