Why should the instanceOf operator be used in conjunction with downcasting?
What will be an ideal response?
The instanceOf operator can be used to test if it is sensible to downcast an object. This makes type casts safer.
Computer Science & Information Technology
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Given the following schema:
Student(Id,Name) Transcript(StudId,CourseName,Semester,Grade)Formulate the following query in SQL: Create a list of all students (Id, Name) and, for each student, list the average grade for the courses taken in the S2002 semester. Note that there can be students who did not take any courses in S2002. For these, the average grade should be listed as 0.
Computer Science & Information Technology
The Task Usage view shows tasks with assigned resources indented below each task on the left and the number of hours of each resource that is assigned to each task in a day-by-day format on the right.
Answer the following statement true (T) or false (F)
Computer Science & Information Technology
A pie chart shows trends over time
Indicate whether the statement is true or false
Computer Science & Information Technology
To add an action button, click the Insert tab, and then in the _____ group, click the Shapes button.
A. Illustrations B. Shapes C. Designs D. Logos
Computer Science & Information Technology