Explain why planning is important in the database lifecycle, highlighting particular points that are important during the process. Discuss the major functions of the Database Administration role, in particular indicating the skills most relevant to the role.
What will be an ideal response?
The planning process should be briefly discussed, such as looking at the overall objectives, what
the current situation is like especially with regard to any particular problems that might be
prevalent. It is possible that a generalized data model for the whole enterprise may be produced,
which may then be subdivided into different functional areas giving priorities for development.
The major functions of database administration concern physical database design,
implementation, testing, data conversion and loading, and operational maintenance. Database
administration is also responsible for DBMS evaluation, although this would not be carried out on
a regular basis. These functions should be described in more detail, and include the skills required
– obviously technically oriented, although other skills will be needed for the minor functions.
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HMAC is a widely used standardized _________ function and is implemented in many protocols and applications.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1. Delay skew is critical because if the wire lengths of different wire pairs are significantly different, the data will arrive at the receiver at different times, potentially creating distortion of the data. 2. Single-mode fiber cables have a core diameter of about 7–10 micrometers. 3. The function of an attenuator is to reduce the receive signal level. 4. The human eye cannot see fiber-optic communication wavelengths, so you should never look into the end of a fiber. 5. It is important to be very careful working with fiber ends. These ends are extremely difficult to see and can become lost and/or easily embedded in your finger.
Discuss how file types are indicated onscreen.
What will be an ideal response?
Event bubbling is _______.
(a) the process of child elements passing events to their parent elements. (b) the process of sorting elements which contain events that have fired. (c) the process of sorting events which have fired. (d) the process of parent elements passing events to their children.