CSE 110 FINAL
A default constructor takes _____ arguments
0
The first element of an array is located at index _____.
0
The index of the last element of an array with a size of 5 elements is _____.
4
Which of the following expression would be a valid index for an array of 5 elements? Choose all that apply.
Answered: 2*2, 2+2 and 4
Which object oriented element is used to define "has a" relationship?
Answered: Data Hiding
Which object oriented element is used to define "is a" relationships?
Answered: Encapsulation, Message Passing, Polymorphism, Composition
Which object oriented element is best defined as "an object should have complete authority over its responsibilities"?
Answered: Inheritance, Encapsulation
Which of the following is a Java primitive data type?
Answered: String,float, int boolean, double,
Creating an object of a class is called ________.
Answered: classification
Which object oriented element is best defined as "objects best viewed as packages of responsibility"?
Answered: composition
Which method can be called to get the size (number of elements) of an ArrayList?
Answered: count
Which method can be used to retrieve an element of an ArrayList? Choose all that apply.
Answered: index, at
The Java reference type equivalent of the primitive type int is _____.
Answered: integer, String
Which of the following are characteristics of the Java programming language?
Answered: interpreted and compiled
Which method can be used to replace an element in an ArrayList? Choose all that apply.
Answered: replace
Immediately after the object's variables are placed in memory _____.
Answered: the object is instantiated, the variables are destroyed, the object is destroyed
Which of the following are good analogies for classes an objects?
Cookie cutters and cookies Blueprints and buildings
A value type variable can store a null reference in Java.
False
Arrays cannot be passed as arguments to methods in Java.
False
In Java, arrays can only store primitive types.
False
Java has a string multiplication operator just like Python.
False
Java uses the same operator for exponentiation as Python
False
Only an enhanced for loop can be used to iterate over an ArrayList
False
Only an enhanced for loop can be used to iterate over an ArrayList.
False
When we instantiate an ArrayList we must specify the initial size.
False
Which object oriented element is best supports object collaboration?
Message Passing
To help us collect information from the user through the keyboard in Java, we use a
Scanner
A name defined in an inner scope is not available outside that block
True
A name defined in an outer scope is also available in all blocks nested inside that scope
True
A reference type variable can store a null reference in Java
True
An advantage of composition is the fact that we can sometimes reuse classes that we have already written, instead of having to design and write new classes.
True
An object is an instance of a class
True
An object is an instance of a class.
True
ArrayLists are reference types.
True
ArrayLists can only store reference types.
True
Data hiding can allow us to separate the information from its representation.
True
Data hiding helps make encapsulation work.
True
In Java, arrays are reference types
True
In general, data hiding means that an object keeps what it knows private.
True
In java, a two dimensional array in Java is really an "array of arrays."
True
Java ArrayList is a generic type.
True
Java ArrayLists are like re-sizable arrays
True
Java boolean literal values are expressed in all lowercase
True
Java has a reference type equivalent for each primitive type
True
The Java String type is a reference type.
True
The ability to use variables as index expression for arrays gives us a way to generalize array access.
True
The differences between value types and reference types applies to parameters
True
We can implement a getter method without a setter method, thus creating a read-only value.
True
We can more easily debug a program when the responsibilities are well encapsulated
True
We can use a variable as an index expression to access an array element in Java
True
We cannot delete individual elements from an array in Java
True
We cannot delete individual elements from an array in Java.
True
When there are no remaining references to an object in your Java program, the object will be destroyed.
True
What structure is commonly used to iterate over all the elements of a two dimensional array?
a nested loop
If a reference type variable does not store a reference to an object, then it stores __________.
a null reference
The Java keywords "public" and "private" are called _____.
access modifiers
Which method can be used to insert an element into an ArrayList?
add
The Java statement counter++ will
add 1 to the variable count
Which of the following is/are true about arrays? Choose all that apply.
an array is a set of variables
The java expression like the one below will evaluate to ________. new Bunny("Flopsy", 8)
an object reference
Which method can be used to add an element to an ArrayList? Choose all that apply.
answered: at, none of these
The Java keyword used to declare that a method does not return a value is _____.
answered: null
Which of the following is a major functional limitation of arrays?
arrays have a fixed size
Which keyword is used in Java to define a class?
class
Every Java program consists of at least one
class definition
Which method can be called to remove all elements from an ArrayList at once?
clear
Which of the following are characteristics of the python programming language
compiled interpreted
Method overloading distinguishes between methods based on
data types of arguments and number of arguments
When there are no remaining references to an object, the object will be _____.
destroyed
Operation are things an object
does
Methods used to access an object's private data are called _____.
getters and setters
Which of the following step comes earliest in the object life cycle?
initialization
The purpose of a constructor is to _____.
initialize an object to a valid state
The purpose of a constructor is to __________
initialize an object to a valid state
The first step in the object life cycle is _____.
instantiation
In java, when you divide an int by another int, the result will be an
int
Which of the following would declare and instantiate an array of 5 integers in Java?
int[] my_array = new int[5];
Which of the following correctly demonstrates the use of an array initializer list? Choose all that apply.
int[] my_array = {1, 2, 3, 4, 5};
Which of the following would declare an array of integers in Java?
int[] my_array;
Java arrays have an attribute named _____ that can be accessed to get the size (number of elements) of the array.
length
The idea of looping through an array (element-by-element) looking for some element that meets our criteria, is called a(n) _____.
linear search
In java, functions are called
methods
Which keyword is used in Java to create an object?
new
which of the following would instantiate an array of 5 integers in Java? Choose all that apply.
new int[5]
Which of the following are characteristics of the Java programming language?
none of these
A reference type variable stores a _____________
reference
All non-primitive types in Java are __________
reference types
Which method can be used to remove an element from an ArrayList?
remove
Java uses the keyword ________ to return a value from a method
return
Which methods can be used to replace an element in an ArrayList?
set
In Java class members are declared with the keyword
static
In Java what keyword does an object use to refer to itself?
this
Which of the following is not a kind of loop in Java? Choose all that apply.
until
When doing an object oriented analysis of a problem, we call the ways that various kinds of users will use the system _____.
use cases
The two kinds of types in the Java programming language are ___________.
value and reference types
All of the Java primitive types are _______.
value types
An object's attributes are implemented as _____.
varaibles
An object's attributes are implemented as
variables
