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A data-driven machine is one that executes an instruction if the needed data is available. The physical ordering of the code listing does not dictate the course of execution. Consider the following pseudo-code 1) Multiply E by 0.5 to get F 2) Add A and B to get E 3) Add B with 0.5 to get D 4) Add E and F to get G 5) Add A with 10.5 to get C Assume A, B, C are already assigned values and the desired output is G Which of the following sequence of execution is valid?

A data-driven machine is one that executes an instruction if the needed data is available. The physical ordering of the code listing does not dictate the course of execution. Consider the following pseudo-code 1) Multiply E by 0.5 to get F 2) Add A and B to get E 3) Add B with 0.5 to get D 4) Add E and F to get G 5) Add A with 10.5 to get C Assume A, B, C are already assigned values and the desired output is G Which of the following sequence of execution is valid? Correct Answer C, B, E, A, D

Instruction 1: Multiply E by 0.5 to get F

Instruction 2:  Add A and B to get E

Instruction 3:  Add B with 0.5 to get D

Instruction 4:  Add E and F to get G

Instruction 5: Add A with 10.5 to get C

Correct Order:

Add B with 0.5 to get D, 

Add A and B to get E

Add A with 10.5 to get C

Multiply E by 0.5 to get F

Add E and F to get G

Explanation:

Since G is the desired output. Therefore Instruction 4, that is, Add E and F to get G must perform at the end. 

Also Instruction 1, that is, Multiply E by 0.5 to get F, cannot happen before instruction 2,  also instruction 4 cannot happen before either instruction 1) or instruction 2).

The only option satisfying this is option 2.

option 2 is correct.

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