Discuss the importance of planning in the database lifecycle, detailing the significant stages in the process. Once the design phase of the database lifecycle has been initiated, the objective is to achieve a conceptual database schema design. Explain the procedures necessary in order to achieve this objective.
What will be an ideal response?
The points made in the first part of 9.4 apply here also. In planning, current and future needs are
determined across the organization. Management commitment is crucial. Specific goals and
objectives are defined, business functions are defined, an information model may be developed
and an implementation plan. This may be revised as the current situation changes. Overall costs
and benefits are assessed,
In commencing design, we are starting data modeling. The process of data modeling should be
explained including the use of various techniques to aid this process. The answer may include
reference to top-down and bottom-up approaches.
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Inside a function definition for a member function of an object with data element x, which of the following is not equivalent to this->x:
a. *this.x b. (*this).x c. x d. (* (& (*this) ) ).x
Create a Cylinder class that extends Circle following the model of RectangularPrism. Answer:
What will be an ideal response?
Local variables have ________ duration.
a) local b) global c) automatic d) static
Why is a minimum spanning tree a tree?
a. Because each vertex is connected to two other vertices b. Because it is based upon a priority queue c. Because it is a graph refactored into a tree d. Because it is a specialized height binary search tree