GATE | Gate IT 2005 | Question 66

In a data flow diagram, the segment shown below is identified as having transaction flow characteristics, with p2 identified as the transaction center

  A first level architectural design of this segment will result in a set of process modules with an associated invocation sequence. The most appropriate architecture is  

(A)

p1 invokes p2, p2 invokes either p3, or p4, or p5

(B)

p2 invokes p1, and then invokes p3, or p4, or p5

(C)

A new module Tc is defined to control the transaction flow. This module Tc first invokes pl and then invokes

(D)

A new module Tc is defined to control the transaction flow. This module Tc invokes p2. p2 invokes p1, and then invokes p3, or p4, or p5

Answer: (C)

Explanation:

According to the data flow diagram a Tc module or transaction is defined to invoke p1 as the diagram is starting from p1 and is being invoked in the diagram. Later, p1 invokes p2 which then invokes either p3, p4, or p5.

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