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Which of the following statements is false?
a. You can always pass an instance of a subclass to a parameter of its superclass type. This feature is known as polymorphism. b. The compiler finds a matching method according to parameter type, number of parameters, and order of the parameters at compile time. c. A method may be implemented in several subclasses. The Java Virtual Machine dynamically binds the implementation of the method at runtime. d. Dynamic binding can apply to static methods. e. Dynamic binding can apply to instance methods.
You can insert a new slide by pressing the ____ keyboard shortcut keys.
A. CTRL+M B. CTRL+I C. CTRL+N D. CTRL+HOME
Suppose that a file initially contains r=120,000 records of R=200 bytes each in an unsorted (heap) file. The block size B=2400 bytes, the average seek time s=16 ms, the average rotational latency rd=8.3 ms and the block transfer time btt=0.8 ms. Assume that 1 record is deleted for every 2 records added until the total number of active records is 240,000.
(a) How many block transfers are needed to reorganize the file? (b) How long does it take to find a record right before reorganization? (c) How long does it take to find a record right after reorganization?
Which datatype is NOT usually used or associated with flags?
A. int B. bool C. char D. double