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Flowcharts: Practice Problems
Flow Chart
A flowchart is a graphical representation that visually displays the flow of data through a processing system. By looking at a flowchart, one can understand the operations performed and the order in which they are performed in a system.
Algorithms consist of a sequence of steps for solving problems, and a flowchart can be used to represent an algorithm. The flowchart describes the operations required to solve a given problem and the sequence in which they are performed. A flowchart can be thought of as a blueprint for a problem-solving design.
Flowchart Symbols
There are 6 basic symbols commonly used in flowcharting of assembly language Programs:
- Terminal,
- Process,
- input/output,
- Decision,
- Connector and
- Predefined Process.
Solved Problems
Problem 1: Flowchart to calculate the area of a circle.
Problem 2: Convert temperature from Fahrenheit to Celsius.
Problem 3: Flowchart to find the greatest of 2 numbers.
Problem 4: Flowchart to print the Even numbers between 9 and 100.
Problem 5: Flowchart for printing odd numbers less than a given number. It should also calculate their sum and count.
Problem 6: Flowchart for calculating the average from 25 exam scores.
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FAQs on Flowcharts: Practice Problems
| 1. How do I draw a flowchart for a simple loop problem step by step? |  |
Ans. Start by identifying the input, process, and output. Use oval shapes for start/end, rectangles for processes, diamonds for decision points, and parallelograms for input/output. Connect each step with arrows showing the flow direction. For loop problems, the diamond represents the loop condition, with one arrow for true and one for false. Practice with basic counting or summation problems to master flowchart symbols and their correct placement.
| 2. What's the difference between a decision diamond and a process rectangle in flowchart practice? | |
Ans. A process rectangle represents a single action or calculation with one entry and one exit point. A decision diamond asks a yes/no question and has multiple exit paths-typically two arrows for true and false conditions. Rectangles execute unconditionally; diamonds control program flow based on conditions. Recognising this distinction is critical for solving flowchart problems accurately and structuring conditional logic correctly in visual algorithm design.
| 3. Why do my flowchart solutions fail when I don't use proper symbols and connectors? | |
Ans. Flowchart symbols follow international standards-using wrong shapes creates ambiguity and makes logic impossible to trace. Proper connectors (arrows) show sequence and control flow; missing or unclear arrows break the logical path. Examiners expect standard ISO symbols: ovals for terminals, diamonds for conditions, rectangles for processes. Inconsistent notation confuses readers and results in lost marks, even if logic appears correct on paper.
| 4. How do I solve flowchart problems involving nested loops and multiple conditions? | |
Ans. Break nested structures into layers: the outer loop diamond controls the inner loop completely. Use separate decision diamonds for each condition; avoid combining them into one. Trace execution manually with test values before finalising. Document counter variables and condition checks at each diamond. Practice problems with multiple conditions build clarity on precedence and scope. Visual tracing ensures nested logic remains logically sound and exam-ready.
| 5. What are common mistakes students make when creating flowcharts for array or list processing problems? | |
Ans. Common errors include forgetting to initialise counters, omitting loop termination conditions, and misplacing decision diamonds. Students often skip checking array boundaries, leading to infinite loops or undefined behaviour. Incorrect variable updates within loops cause logic failures. Always initialise variables before loops begin, place condition checks strategically, and verify each iteration modifies state correctly. Reviewing solved flowchart examples and practising with indexed data structures prevents these costly mistakes.
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Apr 18, 2026 Last updated
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