Difficulty: Easy

Average Score: 85%

The steps in an algorithm to build a picnic table are given.
1) Measure and mark the lumber cuts that need to be made.
2) Buy the needed materials.
3) Determine the needed materials.
4) Cut the lumber to the proper dimensions.
5) Assemble the pieces and paint.

Which two steps of the algorithm should be switched to make the algorithm successful?

Rationale

Steps 2 and 3 should be switched to make the algorithm successful.

Determining the needed materials must occur before purchasing them to ensure that the right items are acquired for building the picnic table. Switching these steps improves the logical flow of the algorithm and ensures all necessary resources are identified before any purchases are made.

A (1 and 2) YOUR ANSWER

Switching steps 1 and 2 would disrupt the logical sequence of the algorithm, as measuring and marking the lumber cuts must happen before any materials are purchased. If materials are bought without knowing the correct measurements, it could result in unnecessary purchases and wasted resources.

B (2 and 3) CORRECT

This is the correct choice because determining the needed materials (step 3) should logically precede buying the materials (step 2). Without first identifying what is required, one risks purchasing incorrect or insufficient materials, which can hinder the project's success.

C (3 and 4) YOUR ANSWER

Switching steps 3 and 4 would not resolve the issue at hand. Cutting the lumber (step 4) can only occur after the necessary materials are identified in step 3. Therefore, this switch would create a nonsensical order of operations, as one cannot cut lumber that has not yet been procured.

D (1 and 3) YOUR ANSWER

Switching steps 1 and 3 would not be beneficial either, as measuring and marking cuts (step 1) is essential for planning the project and must take place before determining what materials are needed. This change would disrupt the sequence of tasks necessary for effective execution.

Conclusion

The success of the algorithm lies in the correct order of operations. By switching steps 2 and 3, the algorithm ensures that all necessary materials are determined before any purchases are made, thus preventing inefficiencies and errors. This logical flow is crucial for the successful construction of the picnic table.

Which two steps of the algorithm should be switched to make the algorithm successful?

Steps 2 and 3 should be switched to make the algorithm successful.

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