Question 1

You can overload methods correctly by providing different parameter lists for methods with the same name.

Accepted Answer

Overloading methods means providing different methods with the same name but different parameters. So, when a method is called, the provided parameters will determine which method will be executed. Therefore, it is necessary to provide different parameter lists for methods with the same name.

Question 2

____ involves using one term to indicate diverse meanings, or writing multiple methods with the same name but with different parameter lists.
A) Referencing
B) Overloading
C) Nesting
D) Signing

Accepted Answer

Overloading is the process of defining multiple methods with the same name but with different parameter lists. This allows for greater flexibility and versatility in the use of the method, as it can be called with different types or numbers of inputs. It is commonly used in object-oriented programming languages like Java and C++.

Question 3

If you give the same name to a class's instance field and to a local method variable, the instance variable overrides the method's local variable.

Accepted Answer

The method's local variable will shadow or hide the instance variable within the scope of the method, not the other way around.

Question 4

When you write your own constructors, you cannot write versions that receive parameters.

Accepted Answer

When you write your own constructors, you can write versions that receive parameters, which are called parameterized constructors.

Question 5

It is illegal to declare the same variable name more than once within a block.

Accepted Answer

Redefining a variable within the same block is not allowed in most programming languages, including Python. Doing so may cause conflicts and unexpected behavior in the program.

Question 6

When they have the same name, variables within ____ of a class override the class's fields.
A) packages
B) statements
C) fields
D) methods

Accepted Answer

Variables within methods of a class can override the class's fields if they have the same name. This is because local variables in methods take precedence over class fields within the scope of that method.

Question 7

A method can receive ____ arguments, even if it is defined as needing double arguments.
A) string
B) integer
C) constructor
D) send

Accepted Answer

A method defined to accept double arguments can also receive integer arguments because integers can be implicitly converted to doubles in most programming languages.

Question 8

It is a convenience to be able to use one reasonable name for ____ that are functionally identical except for argument types.
A) arguments
B) classes
C) tasks
D) packages

Accepted Answer

The answer of It is a convenience to be able...

Question 9

A disadvantage of Java is the large memory requirements to store a separate copy of each variable and method for each instantiation of a class.

Accepted Answer

Java uses a technique called "class loading" which allows multiple instances of a class to share the same method code, thereby reducing memory usage. Only separate memory is allocated for each instance's variable values.

Question 10

When you properly ____ a method, you can call it providing different argument lists, and the appropriate version of the method executes.
A) declare
B) overload
C) name
D) delete

Accepted Answer

Overloading a method means to create multiple versions of the method with different parameters. When calling the method, the appropriate version is executed based on the provided argument list.

Question 11

When you overload a Java method, you write multiple methods with a shared name.

Accepted Answer

When you overload a Java method, you write multiple methods with the same name but with different parameters.

Question 12

A locally declared variable always ____ another variable with the same name elsewhere in the class.
A) creates
B) masks
C) deletes
D) uses

Accepted Answer

When a locally declared variable has the same name as another variable elsewhere in the class, it masks the other variable, meaning the locally declared variable takes priority in that block of code. This can cause confusion and unintended consequences, so it's important to choose variable names carefully to avoid naming conflicts.

Question 13

Fields declared to be static are not always final .

Accepted Answer

While it is common practice to declare static fields as final, it is not required. Static fields can be mutable and their values can be changed by the program at runtime.

Question 14

An alternative to importing a class is to import an entire package of classes.

Accepted Answer

Yes, it is true that one can import an entire package of classes into a program. This can be done using the "import" statement followed by the name of the package. For example, "import numpy" would import the entire numpy package and make all of its classes available in the program.

Question 15

When you multiply an int and a double , the result is the int .

Accepted Answer

When you multiply an int and a double, the result is a double because the multiplication operator promotes the int operand to a double before performing the multiplication.

Question 16

When an application contains just one version of a method, you can call the method using a(n) ____ of the correct data type.
A) parameter
B) scope
C) output
D) constructor

Accepted Answer

When calling a method with just one version, you need to provide a parameter of the correct data type to pass into the method. This is necessary for the method to execute properly and return the expected output.

Question 17

Object-oriented programmers use the term ____ when a child class contains a field or method that has the same name as one in the parent class.
A) out of scope
B) ambiguous
C) override
D) parent friendly

Accepted Answer

This is called method/field overriding, where the child class provides its own implementation for a method or field that already exists in the parent class. This can lead to confusion and errors if not done properly, but is an important concept in object-oriented programming.

Question 18

A variable comes into existence, or ____, when you declare it.
A) goes out of scope
B) comes into scope
C) overrides scope
D) is referenced

Accepted Answer

A variable is said to come into scope when it is declared and is accessible to the program in its defined scope. When the control exits the scope, the variable goes out of scope and is no longer accessible. The other options are not relevant to the creation of a variable.

Question 19

Within any class or method, the code between a pair of curly braces is called a(n) ____.
A) overload
B) argument
C) scope
D) block

Accepted Answer

The code between a pair of curly braces is called a block. It defines the scope of the variables and functions declared within it.

Question 20

A block can exist entirely within another block or entirely outside and separate from another block, and sometimes blocks can overlap.

Accepted Answer

The answer of A block can exist entirely within another...

Quiz 4: More Object Concepts

You can overload methods correctly by providing different parameter lists for methods with the same name.

____ involves using one term to indicate diverse meanings, or writing multiple methods with the same name but with different parameter lists.

If you give the same name to a class's instance field and to a local method variable, the instance variable overrides the method's local variable.

When you write your own constructors, you cannot write versions that receive parameters.

It is illegal to declare the same variable name more than once within a block.

When they have the same name, variables within ____ of a class override the class's fields.

A method can receive ____ arguments, even if it is defined as needing double arguments.

It is a convenience to be able to use one reasonable name for ____ that are functionally identical except for argument types.

A disadvantage of Java is the large memory requirements to store a separate copy of each variable and method for each instantiation of a class.

When you properly ____ a method, you can call it providing different argument lists, and the appropriate version of the method executes.

When you overload a Java method, you write multiple methods with a shared name.

A locally declared variable always ____ another variable with the same name elsewhere in the class.

Fields declared to be static are not always final .

An alternative to importing a class is to import an entire package of classes.

When you multiply an int and a double , the result is the int .

When an application contains just one version of a method, you can call the method using a(n) ____ of the correct data type.

Object-oriented programmers use the term ____ when a child class contains a field or method that has the same name as one in the parent class.

A variable comes into existence, or ____, when you declare it.

Within any class or method, the code between a pair of curly braces is called a(n) ____.

A block can exist entirely within another block or entirely outside and separate from another block, and sometimes blocks can overlap.