A jumbo frame size can be up to how many bytes and is supported by most Gigabit switches.
What will be an ideal response?
9216 bytes
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What is the main purpose of a class constructor function?
A. to destruct the class when the program ends. B. to create object and initialize class data when called in main or in another function. C. to reserve memory for all program variables. D. To run all of the member functions.
To embed a Flash Player, you use the ____ parameter to identify the video file to be played.
A. src B. object C. movie D. href
Use the relational algebra to ?nd the list of all “problematic” classes (i.e., coursesemester pairs) where the failure rate is higher than 20%. (Assume, for simplicity, that grades are numbers between 1 and 4, and that a failing grade is anything less than 2.)
Because the relational algebra does not have aggregate operators, we must add them to be able to solve the above problem. The additional operator you should use is count A/B(r). The meaning of this operator is as follows: A and B must be lists of attributes in r. The schema of count A/B(r) consists of all attributes in B plus one additional attribute, which represents the counted value. The contents of count A/B(r) are de?ned as follows: for each tuple, t ? ?B(r) (the projection on B ), take ?A(?B=t(r)) and count the number of tuples in the resulting relation (where ?B=t(r) stands for the set of all tuples in r whose value on the attributes in B is t ). Let us denote this number by c(t ). Then the relation count A/B(r) is defined as {< t , c(t ) >| t ? ?B(r)}. You should be able to recognize the above construction as a straightforward adaptation of GROUP BY of SQL to the relational algebra.
Constructing lengthy macros to increase the automation in performance of an Access database can be enhanced by placing constraints upon differing aspects of the macro
Indicate whether the statement is true or false