A selection marquee can be moved within an image, but it cannot be used in another image.
Answer the following statement true (T) or false (F)
False
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Authentication makes use of the _________ message authentication code.
Fill in the blank(s) with the appropriate word(s).
The clear method can be used to remove all key-value entries from a hash.
Answer the following statement true (T) or false (F)
A constructor can specify the return type:
a. int. b. string. c. void. d. A constructor cannot specify a return type.
Consider classes A, B and C, where A is an abstract superclass, B is a concrete class that inherits from A and C is a concrete class that inherits from B. Class A declares abstract method originalMethod, implemented in class B. Which of the following statements is true of class C?
a. Method originalMethod cannot be overridden in class C—once it has been implemented in concrete class B, it is implicitly final. b. Method originalMethod must be overridden in class C, or a compilation error will occur. c. If method originalMethod is not overridden in class C but is called by an object of class C, an error occurs. d. None of the above.