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A logical DFD makes it easier to communicate for the employees of an organization, leads to more stable systems, allows for better understanding of the system by analysts, is flexible and easy to maintain, and allows the user to remove redundancies easily. On the other hand, a physical DFD is clear on division between manual and automated processes, gives detailed description of processes, identifies temporary data stores, and adds more controls to make the system more efficient and simple.
simply put…
1. Logical DFDs are not concerned about how the system is or will be constructed
while Physical DFDs show how the system is or will be constructed.
2. Physical DFDs are more realistic and complex while Logical DFDs are simpler but provide an easier understanding view
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What is the difference between definition and explain?
a definition is brieflysummarizingsomething, so say define competitor you would say abusiness rival in the same market for products or services offered by an organisation but explaining you have to put ofr detail, so explain how hitler came to power you would have to go on further detail and apply yourknowledge. Basically definition is brief and short and explain you apply your knowledge and give detail
What does briefly outline mean?
It means give a brief general description of something.
How can you use the word minus in a sentence?
Seven minus three equals four. It was a really nice day, minus the brief shower storm.
What is the combination for the brief case for Nancy drew message in a haunted mansion?
The combination to Louis' briefcase is on his laptop. Solve the maze puzzle and go to the passwords icon on his desktop. Unless you can easily remember 8 numbers, I suggest writing down the combo when you find it. Now lock it into Louis' briefcase [make sure to start on the left lock first].
How could you use Descartes' rule to predict the number of complex roots to a polynomial?
Descartes' rule of signs will not necessarily tell exact number of complex roots, but will give an idea. The Wikipedia article explains it pretty well, but here is a brief explanation:It is for single variable polynomials.Order the polynomial in descending powers [example: f(x) = ax³ + bx² + cx + d]Count number of sign changes between consecutive coefficients. This is the maximum possible real positive roots.Let function g(x) = f(-x), count number of sign changes, which is maximum number of real negative roots.Note these are maximums, not the actual numbers. Let p = positive maximum and q = negative maximum. Let m be the order (maximum power of the variable), which is also the total number of roots.So m - p - q = minimum number of complex roots. Note complex roots always occur in pairs, so number of complex roots will be {0, 2, 4, etc}.
