System Analysis and Design
Which of the following statements is not true

All of these
pointers are useful in traversing a linked list
a checksum digit is used for detecting Errors in data transmission
None of these
at example of a hierarchical data structure is tree

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System Analysis and Design
An open rectangle

identifies data flow
None of these
defines a source or destination of system data
represents a process that transforms incoming data flow(s) into outgoing data flows
is a data store-data at rest, or a temporary repository of data

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System Analysis and Design
Top-down programming is

a map of the programmer's view of the data
an approach in which the top module is first tested then program modules are added from the highest level to the lowest level
a group of related fields
a series or group of components that perform one or more operations of a more complex system

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