1 C OOPT1Q4 An abstract class can be instantiated TRUE # FALSE 1 B 1 A OOPT1Q8 Which type of class has only one unique value for all the objects of
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means exposing only necessary information to client? A 56) An Object can be declared prior to the class definition A True B False: Answer: False 57) Use
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1/20/06 OOP: True or False Every object in Java is an Object The “is-a” Although a class may have many subclasses, it may have only one direct superclass An instance (an object) of a superclass can be treated as if it were an instance of any of its A constructor is more like a class method than an instance method
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test is supplied with a mock test key to let you verify the final score and grade yourself Q 7 - What is the default value of Boolean variable? A - true B - false C - null A - Variables, methods and constructors which are declared protected can be variables, methods and constructors can be accessed by subclass only
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there are multiple copies of blank finals (one per object) and only one true constant (one per extends 3 A subclass can have only one superclass because Java doesn't support The answer is false: a class cannot inherit constructors 9
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True/False Indicate whether the statement is true or false ____ 1 A program goes through As parameters to functions, class objects can be passed only by reference A derived class cannot have a constructor with default parameters
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The constructor method has no definition The class can have only one constructor
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Which two statements are true about the Scanner class? (Choose two correct ( B) Methods can never be written with more than four parameters (C) Methods In Java, methods usually hold the properties of an object (A) True (B) False Answer (B) (D) Default constructor should have at least one argument Answer (A)
Exercises
Assume that the constructor is defined within the class definition leverage() { crowbar = 0; } 14 True or false: In a class you can have more than one constructor
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True/False: The constructor should have only one or zero arguments Answer: False 3 True/False: A class may have more than one constructor Answer: True A compiler will provide a default if you do not provide a ______ 1 constructor
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(c) A constructor method must have the same name as its class. TRUE. (d) A class can have only one constructor method. FALSE.
A subclass can have only one superclass because Java doesn't support The answer is false: a class cannot inherit constructors.
The Math class methods can be called without creating an instance of a Math object. (A) True. (B) False. Answer (A). 27. You need to generate random integer
If is a matrix or data.frame TRUE will retain the rownames of that object ... FALSE prevents joins that would result in more than nrow(x)+nrow(i) rows.
constructors but not private members such as implementation fields. A programmer-defined class can have any name except a Java keyword.
'a' – Single character. Multi-line Strings. Normally it is a syntax error if a string has any actual newline characters. That is
27 Aug 2021 A value that can only be assigned true false
OOPT1Q2 Can constructors be overloaded? TRUE # FALSE OOPT1Q8 Which type of class has only one ... OOPT1Q92 State true of false. i) We cannot make the ...
Write printdots in an accumulative recursive style. This will require more than one function. The accumulator will hold the growing sequence of dots;
There is a vector field F such that ? × F?x y
ComS 207: Programming I Midterm 1 SAMPLE SOLUTIONS