Question 1

Which of the following statements is false

Accepted Answer

Each method can access its own local variables and those of other methods.Actually,each method can access its own local variables,but not those of other methods.

Question 2

By default,everything in a class is ________,unless you specify otherwise by providing access modifiers.
a) public
b) private
c) protected
d) None of the above.

Accepted Answer

Actually,the default initial value for string instance variables is null

Question 3

The code
myAccount.SetName(theName);
calls myAccounts's SetName method,passing theName's value as SetName's argument.

Accepted Answer

This statement calls myAccount's SetName method with the argument value of theName.

Question 4

Each class you create becomes a new type you can use to create objects,so C# is a(n)________ programming language.

Accepted Answer

extensible

Question 5

Which of the following statements about creating,compiling and running a Visual C# project with two classes is false

Accepted Answer

In a given project,declaring a Main method in more than exactly one class results in a runtime error.Actually,it's a compilation error.

Question 6

Which of the following statements is false

Accepted Answer

Instance variables are declared inside the bodies of the class's methods and properties.Actually,instance variables are declared inside a class declaration but outside the bodies of the class's methods and properties.

Question 7

A method such as Main "drives" an object by calling its methods-without having to know how the class's internal mechanisms work.In this sense,the class containing method Main is referred to as a driver class.

Accepted Answer

This statement is true. The Main method in the driver class calls the methods of the object it "drives" without needing to know the inner workings of the class.

Question 8

Consider the code (in class Account):
Public string GetName()
{
Return name;
}
Which of the following statements is false

Accepted Answer

All of the above are True

Question 9

Consider the code:
Console.WriteLine($"Initial name is: {myAccount.GetName()}");
Which method is called first

Accepted Answer

GetName

Question 10

Consider the code:
Public void SetName(string accountName)
{
Name = accountName;// store the account name
}
Which of the following statements is false

Accepted Answer

A method requires one or more parameters that represent the data it needs to perform its task.Actually,a method also can have no parameters.

Question 11

Most instance variables are declared ________.

Accepted Answer

private

Question 12

The fact that we could create and manipulate an Account object without knowing its implementation details is called ________.This is one of the most powerful software-engineering benefits of object-oriented programming.

Accepted Answer

abstraction

Question 13

An attempt by a method that's not a member of a particular class to access a private member of that class is a runtime error.

Accepted Answer

Actually it's a compilation error.

Question 14

Method ReadLine reads a whole line,including all the characters the user types up to and including the newline that the user typed by pressing Enter.

Accepted Answer

Actually,method ReadLine reads a whole line,including all the characters the user types until the newline that the user typed by pressing Enter-the newline is discarded.

Question 15

Instance variables are required to be explicitly initialized before they're used in a program.

Accepted Answer

Actually,instance variables are not required to be explicitly initialized before they're used in a program-unless they must be initialized to values other than their default values.

Question 16

Which of the following statements is false

Accepted Answer

Each object of a class shares one copy of the class's instance variables.Actually,each object of a class has its own copy of the class's instance variables.

Question 17

Consider the code:
MyAccount.SetName(theName);
Which of the following statements is false

Accepted Answer

All of the above are True

Question 18

Which of the following statements is false

Accepted Answer

All of the above are True

Question 19

By default,instance variables are not initialized.

Accepted Answer

Actually,every instance variable has a default initial value-a value provided by C# if you do not specify the instance variable's initial value.

Question 20

Making a class's instance variables public and its methods private and accessing those instance variables only through the class's methods and properties facilitates debugging,because problems with data manipulations are localized to the methods (and properties).

Accepted Answer

Actually,making a class's instance variables private and its methods public and accessing those instance variables only through the class's methods and properties facilitates debugging,because problems with data manipulations are localized to the methods (and properties).

Quiz 4: Introduction to Classes,Objects,Methods and Strings

Which of the following statements is false

By default,everything in a class is ________,unless you specify otherwise by providing access modifiers. a) public b) private c) protected d) None of the above.

The code myAccount.SetName(theName); calls myAccounts's SetName method,passing theName's value as SetName's argument.

Each class you create becomes a new type you can use to create objects,so C# is a(n) ________ programming language.

Which of the following statements about creating,compiling and running a Visual C# project with two classes is false

Which of the following statements is false

A method such as Main "drives" an object by calling its methods-without having to know how the class's internal mechanisms work.In this sense,the class containing method Main is referred to as a driver class.

Consider the code (in class Account) : Public string GetName() { Return name; } Which of the following statements is false

Consider the code: Console.WriteLine($"Initial name is: {myAccount.GetName() }") ; Which method is called first

Consider the code: Public void SetName(string accountName) { Name = accountName;// store the account name } Which of the following statements is false

Most instance variables are declared ________.

The fact that we could create and manipulate an Account object without knowing its implementation details is called ________.This is one of the most powerful software-engineering benefits of object-oriented programming.

An attempt by a method that's not a member of a particular class to access a private member of that class is a runtime error.

Method ReadLine reads a whole line,including all the characters the user types up to and including the newline that the user typed by pressing Enter.

Instance variables are required to be explicitly initialized before they're used in a program.

Which of the following statements is false

Consider the code: MyAccount.SetName(theName) ; Which of the following statements is false

Which of the following statements is false

By default,instance variables are not initialized.

Making a class's instance variables public and its methods private and accessing those instance variables only through the class's methods and properties facilitates debugging,because problems with data manipulations are localized to the methods (and properties).