Algorithm design: a written set of instructions for tying a bow (step 1, step 2, …) exemplifies which fundamental control structure?

Difficulty: Easy

Correct Answer: Sequence

Explanation:


Introduction / Context:
Structured programming uses three basic control structures—sequence, selection, and repetition—to express any algorithm. Recognizing the structure in everyday instructions deepens understanding.



Given Data / Assumptions:

  • The task is a fixed series of steps with no branching or looping.
  • Each step follows the previous one deterministically.
  • No conditions or repeated iterations are specified.


Concept / Approach:
Sequence executes statements in order. Selection chooses among paths based on a condition. Repetition repeats a block until a condition changes. Tying a bow per an instruction list is classic sequence.



Step-by-Step Solution:

Identify absence of ‘‘if/else’’ decisions (rules out selection).Identify absence of ‘‘repeat until’’ or ‘‘while’’ constructs (rules out repetition).Conclude it is a straight-line sequence of steps.


Verification / Alternative check:
Flowchart would show a start node, consecutive process boxes, and an end node without decision diamonds or loops.



Why Other Options Are Wrong:
Selection and repetition introduce logic not present; ‘‘control’’ is too vague.



Common Pitfalls:
Overcomplicating simple procedures by adding unnecessary conditions; keep algorithms minimal yet complete.



Final Answer:
Sequence

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