Flowcharts for visualizing logic in Intro to Computing - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a flowchart with the correct symbol.

Intro to Computing

Start with a [1] symbol to begin the flowchart.

Drag options to blanks, or click blank then click option'

Aparallelogram

Brectangle

Cdiamond

Doval

Attempts:

3 left

💡 Hint

Common Mistakes

Using a rectangle which is for processes.

Using a diamond which is for decisions.

The oval shape is used to represent the start or end of a flowchart, like turning on a machine.

2fill in blank

medium

Complete the code to represent a decision point in a flowchart.

Intro to Computing

Use a [1] shape to show a question or decision in the flowchart.

Drag options to blanks, or click blank then click option'

Adiamond

Brectangle

Coval

Dcircle

Attempts:

3 left

💡 Hint

Common Mistakes

Using a rectangle which is for processes.

Using an oval which is for start/end.

The diamond shape is used to represent decisions or questions that lead to different paths, like asking "Is it raining?".

3fill in blank

hard

Fix the error in the flowchart symbol for a process step.

Intro to Computing

A process step should be shown with a [1] shape, not a diamond.

Drag options to blanks, or click blank then click option'

Arectangle

Boval

Ccircle

Dtriangle

Attempts:

3 left

💡 Hint

Common Mistakes

Using diamond which is for decisions.

Using oval which is for start/end.

The rectangle shape represents a process or action step, like "Mix ingredients" in a recipe.

4fill in blank

hard

Fill both blanks to complete the flowchart code for input and output steps.

Intro to Computing

Use a [1] shape for input and a [2] shape for output in a flowchart.

Drag options to blanks, or click blank then click option'

Aparallelogram

Brectangle

Coval

Ddiamond

Attempts:

3 left

💡 Hint

Common Mistakes

Using rectangle for input/output which is for processes.

Using diamond which is for decisions.

The parallelogram shape is used for both input and output steps, like "Enter name" or "Display result".

5fill in blank

hard

Fill all three blanks to create a simple flowchart code snippet for checking if a number is positive.

Intro to Computing

Start with [1], then use [2] to ask if number > 0, finally [3] to end.

Drag options to blanks, or click blank then click option'

Aoval

Bdiamond

Drectangle

Attempts:

3 left

💡 Hint

Common Mistakes

Using rectangle for start or end.

Using oval for decision.

The flowchart starts with an oval (start), uses a diamond for the decision "Is number > 0?", and ends with an oval (end).

Practice

1. What shape is commonly used in a flowchart to represent a decision point?

easy

A. Rectangle

B. Circle

C. Oval

D. Diamond

Solution

1. Step 1: Identify flowchart shapes and their meanings

   Ovals represent start/end, rectangles represent processes, and diamonds represent decisions.

2. Step 2: Match decision point to shape

   The decision point is shown as a diamond to indicate a yes/no or true/false choice.

3. Final Answer:

   Diamond -> Option D

4. Quick Check:

   Decision = Diamond [OK]

Hint: Decisions use diamond shapes in flowcharts [OK]

Common Mistakes:

• Confusing rectangle (process) with decision
• Thinking oval is for decisions
• Using circle instead of diamond

2. Which of the following is the correct symbol to start a flowchart?

easy

A. Oval

B. Diamond

C. Rectangle

D. Parallelogram

Solution

1. Step 1: Recall flowchart start/end symbols

   Ovals are used to mark the start and end points in flowcharts.

2. Step 2: Identify the correct start symbol

   Among the options, only the oval represents the start/end point.

3. Final Answer:

   Oval -> Option A

4. Quick Check:

   Start symbol = Oval [OK]

Hint: Start and end use oval shapes in flowcharts [OK]

Common Mistakes:

• Choosing rectangle which is for processes
• Confusing diamond with start symbol
• Using parallelogram which is for input/output

3. Consider this flowchart logic: Start -> Input number -> Is number > 10? -> Yes: Print 'High' -> No: Print 'Low' -> End. What will be printed if the input is 7?

medium

A. High

B. Low

C. 7

D. Error

Solution

1. Step 1: Understand the decision condition

   The flowchart checks if the input number is greater than 10.

2. Step 2: Apply input value to condition

   Since 7 is not greater than 10, the flow follows the 'No' branch and prints 'Low'.

3. Final Answer:

   Low -> Option B

4. Quick Check:

   7 > 10? No, so print Low [OK]

Hint: Follow decision branches carefully for output [OK]

Common Mistakes:

• Printing input number instead of 'Low'
• Choosing 'High' by mistake
• Assuming error on input

4. A flowchart has a decision diamond with two arrows labeled 'True' and 'False'. The 'False' arrow mistakenly loops back to the start instead of continuing. What is the likely problem?

medium

A. Wrong shape used for decision

B. Correct flowchart with no issues

C. Infinite loop causing the process never to end

D. Missing start symbol

Solution

1. Step 1: Analyze the incorrect arrow direction

   The 'False' arrow looping back to start causes the process to repeat endlessly.

2. Step 2: Understand impact on flowchart execution

   This creates an infinite loop, preventing the flowchart from reaching an end.

3. Final Answer:

   Infinite loop causing the process never to end -> Option C

4. Quick Check:

   Loop back to start = infinite loop [OK]

Hint: Check arrow directions to avoid infinite loops [OK]

Common Mistakes:

• Thinking it's a correct flowchart
• Confusing missing start with loop issue
• Ignoring arrow labels

5. You want to design a flowchart that reads a number and prints 'Even' if the number is divisible by 2, otherwise prints 'Odd'. Which sequence of shapes correctly represents this logic?

hard

A. Oval (Start) -> Rectangle (Input) -> Diamond (number % 2 == 0?) -> Rectangle (Print 'Even') if Yes -> Rectangle (Print 'Odd') if No -> Oval (End)

B. Rectangle (Start) -> Diamond (Input) -> Oval (Check) -> Rectangle (Print) -> Oval (End)

C. Oval (Start) -> Diamond (Input) -> Rectangle (Check) -> Diamond (Print) -> Oval (End)

D. Oval (Start) -> Rectangle (Input) -> Rectangle (Check) -> Diamond (Print) -> Oval (End)

Solution

1. Step 1: Identify correct flowchart symbols for each step

   Start/end use ovals, input uses rectangle, decision uses diamond, and output uses rectangle.

2. Step 2: Match sequence to logic

   Input number (rectangle), decision if divisible by 2 (diamond), print 'Even' or 'Odd' (rectangles), then end (oval).

3. Final Answer:

   Oval (Start) -> Rectangle (Input) -> Diamond (number % 2 == 0?) -> Rectangle (Print 'Even') if Yes -> Rectangle (Print 'Odd') if No -> Oval (End) -> Option A

4. Quick Check:

   Correct shapes in logical order [OK]

Hint: Use oval-start/end, diamond-decision, rectangle-process [OK]

Common Mistakes:

• Using diamond for input or output
• Starting with rectangle instead of oval
• Mixing up decision and process shapes