Paper 2: Flow Diagrams, Trace Tables and Structure Diagrams Flashcards
What is the purpose of the Start/Stop symbol in flow diagrams?
Used to start and end a flowchart
Essential for defining the boundaries of the flowchart.
What does the Input/Output symbol represent in flow diagrams?
Used when you want the user to input something into the program or for the program to output something (print)
Indicates data entry or results display.
What is represented by the Process symbol in a flow diagram?
Used to carry out calculations, carry out a process e.g fullname = firstname + surname
Illustrates operations or transformations in the flow.
What is the function of the Decision symbol in flow diagrams?
Used when asking a question. Used for If statements when a decision needs to be made
Typically has two outgoing arrows for Yes and No responses.
What does the Sub Routine symbol do in flow diagrams?
Used to break flow diagrams into smaller sections or when sections need to be repeated
Facilitates modular programming and code reuse.
How many arrows are there going into each block in a flow diagram?
One arrow going into each block (Unless it’s a start block)
Ensures clarity in the flow of operations.
How many arrows are there going out from a block in a flow diagram?
One arrow going out from the block unless its an end block or a decision block
Decision blocks have two arrows for different outcomes.
What are Sub routines in flow diagrams?
Created by using start and stop blocks, changing the name from Start to the name of the routine instead
Enhances readability and organization of complex diagrams.
What is the main purpose of Trace Tables?
Used to demonstrate how code will work by stepping through the code using data to see how it will work in any given situation
Useful for debugging and verifying code logic.
What do Structure Diagrams represent?
Used as part of the concept of Decomposition. Breaking a task down into smaller steps
Aids in understanding complex processes by simplifying them.
Fill in the blank: The aim of a structure diagram is _______.
[to break a task down into smaller steps]
True or False: Flow diagrams can have multiple arrows going into a decision block.
False
Each block typically has one incoming arrow.
What is the role of the special sub routine block in flow diagrams?
Called to invoke a subroutine in the main code
Allows for organized flow control and execution.
