Gamified DFD Quiz

In a DFD, data flows are represented in which of the following shape.

• rectangles / ellipses

• square

• circles / round-edged rectangles

• arrows

The given DFD is incomplete because ___________.

• it has only one input

• output data flows to two external entities instead of one entity

• it writes and reads from the same data store

• the process is not named and thus, the entire focus of the context is missing

In a DFD, data cannot flow between two data stores because ​ ​ (a)  

• the data will get merged.
• the data will get corrupted.
• the data will be lost.
• DFD level up rules do not allow this.

In a DFD, a data flow can ____________.

• only emanate from an external entity

• may emanate and terminate in an external entity

• only terminate in an external entity

• may either emanate or terminate in an external entity but not both

In a DFD, an external entity represents a/an __________.

• unit outside of the system whose behavior is expected to interact with the system

• unit that is part of the system and decided by software engineers

• unit that is part of the data store

• unit which is an integral part of data flow

A data store in a DFD represents ____________.

• a JSON file

• a database

• a cloud storage

• repository of data

In a DFD, data cannot flow between a data store and _______________.

• another data store and also a data store and a process

• a process and also a datastore and an external entity

• another data store and also a data store and an external entity

• a process

In a DFD, data cannot flow from an external entity to an external entity because _________.

• The data will get corrupted

• a data storage is always needed at all levels of DFD

• both are outside the context of the system

• they both get corrupted if they do this

The given DFD context diagram is not complete because _________.

• There is no output data flow from the process, and the external entities are not visible.

• there is no process, and data flow in the DFD

• there is no level up in the DFD

• there is no data store in the DFD

By levelling up a DFD, which of the followings happen?

• the system splits to a modelling structure where it can now be developed in microservices

• the system provides more details by breaking the existing processes into several sub processes

• the system identifies more external entities as at lower DFD levels not all external entities are defined

• the system changes the name of all data flows as at lower DFD levels all data flows are vague and incorrect