Which of the following statements is false?
a. A runnable thread can enter the timed waiting state for a specified interval of time. It transitions back to the runnable state when that time interval expires or when the event it’s waiting for occurs.
b. Timed waiting threads and waiting threads can use a processor, if one is available.
c. A runnable thread can transition to the timed waiting state if it provides an optional wait interval when it’s waiting for another thread to perform a task. Such a thread returns to the runnable state when it’s notified by another thread or when the timed interval expires—whichever comes first.
d. Another way to place a thread in the timed waiting state is to put a runnable thread to sleep—a sleeping thread remains in the timed waiting state for a designated period of time (called a sleep interval), after which it returns to the runnable state.
B
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Consider a software system that will implement the following classes: Student, Professor, StaffMember, ContractWorker. List some common attributes of these classes. What would be a good abstract class from which these classes may be extended via inheritance?
What will be an ideal response?
Which of the following statements is false?
a. In the UML, each class is modeled in a class diagram as a rectangle with three compartments. The top one contains the class’s name centered horizontally in boldface. The middle one contains the class’s attributes, which correspond to instance variables in Java. The bottom one contains the class’s operations, which correspond to methods and constructors in Java. b. UML represents instance variables as an attribute name, followed by a colon and the type. c. Private attributes are preceded by the keyword private in the UML. d. The UML models operations by listing the operation name followed by a set of parentheses. A plus sign (+) in front of the operation name indicates that the operation is a public.
Blackboard is an example of ________ software
A) course management B) gaming C) drawing D) utility
Manually entering data into an Access table will create consistencies in the table and improve the integrity of the data
Indicate whether the statement is true or false