Question

2. Compare and contrast between flowcharts that involve:
• simple logic flow and
• simple logic flow with a two way branch.

Answer 1

Answer:

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Answer 2

Answer:

Use a Logic Flowchart to:

· represent the logic of a process which involves intermingling the evaluation of conditions with the execution of several actions,

· uncover loopholes in logic which could cause problems,

· compare what is actually happening in a process or logic with what should be happening to uncover problems.

Method

LOGIC FLOWCHART SYMBOLS

The following symbols are used on a Logic Flowchart:

· Flow of Control — A symbol used to indicate the control direction or movement between other symbols.

· Termination — A symbol used to indicate the start and finish of the flowchart.

· Process Box — A symbol used to illustrate the occurrence of any process or action.

· Decision Diamond — A symbol used to distinguish between two states of affairs and as a consequence direct the flow of control one way or another. There are only two possible exits to a decision diamond, YES or TRUE and NO or FALSE.

Rules for Constructing a Logic Flowchart

Advantages and Disadvantages of Logic Flowcharts

CONVENTIONAL FLOWCHART SYMBOLS

The following conventional flowchart symbols are from the IBM flowchart template:

· Communication Link — Represents data transfer into or out of the scope of the system.

· Data Preparation — Represents a written input medium.

· Decision — Represents some logical decision point that controls processing flow.

· Disk Storage — Represents some magnetic media device that exists for read/write purposes.

· Display — Represents a Cathode Ray Terminal/Liquid Crystal Display (CRT/LCD) output medium.

· Document — Represents some paper-based output.

· Extract — Represents a logical database (or flatfile) data retrieval operation that results in a set of buffered data.

· Input/Output — Represents data flow direction during I/O operations.

· Keying — Represents a keyboard data entry activity.

· Magnetic Tape — Represents some magnetic tape data storage media.

· Manual Operation — Represents an action the user must perform.

· Merge — Represents the merging of two data sets.

· Off-page connector — A symbol that connects a diagram component on the current page to a diagram symbol on another page.

· Office Storage — Represents paper files.

· On-page connector — A symbol that connects a diagram component to another diagram component on the same page.

· Pre-defined Process — Represents a unit of logic that has already been coded and more than likely resides in a code library.

· Process — Represents some set of logic that has defined inputs and outputs.

· Sort — Represents a logical sort routine that is applied to some output data set.

Explanation:

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