In a data flow diagram (DFD),a square represents an internal entity. 
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Q1: The following symbol represents a computer process.
Q3: A customer is an example of an
Q4: A data flow diagram (DFD) is a
Q5: The following symbol represents a document.
Q6: The following symbol represents general purpose input-output.
Q7: The following symbol represents a manual process
Q10: The following symbol represents a paper file.
Q11: The following symbol represents a disk data
Q12: Data flow diagrams (DFDs) present a comprehensive
Q14: A context diagram is a top-level diagram
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