7.10 Writing and Amending Algorithms Cambridge IGCSE 0478

What is the purpose of pseudocode in algorithm design?

• To provide a structured way of describing an algorithm without using a specific programming language.

• To translate code directly into machine language.

• To execute programs faster.

• To replace flowcharts entirely.

Which of the following best describes a flowchart?

• A diagrammatic representation of an algorithm using symbols to represent different steps.

• A document explaining how a program works.

• A high-level programming language used for coding.

• A collection of test cases for a program.

What is an essential feature of a well-written algorithm?

• Clarity and precision in instructions.

• Use of as many technical terms as possible.

• The ability to run without an interpreter.

• Dependence on a specific programming language.

Consider the following pseudocode: What is the error in this algorithm?

• The condition should use 'AND' instead of 'OR'.

• The pseudocode should not include 'CopyEdit'.

• The condition should check each name separately.

• The 'ENDIF' statement is unnecessary.

Which of the following is NOT a characteristic of a good algorithm?

• Ambiguity.

• Efficiency.

• Correctness.

• Clarity.

What is the purpose of using indentation in pseudocode?

• To improve readability and show the structure of the algorithm.

• To make the algorithm run faster.

• To reduce the number of variables needed.

• To increase the number of steps in an algorithm.

A flowchart typically uses which symbol to represent a decision (IF statement)?

• A diamond.

• A rectangle.

• An oval.

• A parallelogram.

When amending an algorithm, what is the first step?

• Identifying the part of the algorithm that needs modification.

• Deleting the entire algorithm and rewriting it from scratch.

• Adding more variables to the algorithm.

• Ignoring syntax rules to focus only on logic.

Consider the pseudocode shown
What correction should be made to this algorithm?

• Add an END FOR statement to properly close the loop.

• Replace total ← 0 with total ← 1.

• Change FOR i ← 1 TO 5 to FOR i ← 5 TO 1.

• Remove the OUTPUT statement.

Which of the following statements is true about flowcharts?

• They provide a visual representation of an algorithm, making it easier to understand.

• They replace pseudocode entirely.

• They can only be used for complex algorithms.

• They are written in a specific programming language.