1. The statement Stack objectStack = new Stack(); indicates that object Stack stores _______ .

Object

Stack

integers

strings

2. Attempting to invoke a derived-class-only method through a base-class variable is an error.

True

False

3. Which of the following property specify the duration of a Timer in System.Timers.Timer

Events

Interval

Duration

Enabled

4. The .NET languages have which of the following in common?

Syntax

Keywords

Base Class Library

5. Which of the following classes is not in the System.IO namespace?

BinaryReader

FileInfo

FileLoad

StreamWriter

6. Why does a syntax error occur when trying to declare a variable called 'lock'?

'lock' is immutable

'lock' is mutable

'lock' is a reserved keyword

'lock' is a system attribute

7. Which of the following is an appropriate declaration of an abstract method?

public abstract int GetScore() { }

public abstract int GetScore();

public int GetScore() as abstract;

none of the above

8. In a WPF project, there is a textbox UI element named txtAge is used for age input, which of the following can properly obtain an integer value of age?

int age = txtAge;

int age = txtAge.Text;

int age = Convert.ToInt32(txtAge);

int age = int.Parse(txtAge.Text);

9. Which of the following best describes what a delegate is?

A strongly typed function pointer.

A lightweight thread or process that can call a single method.

A reference to an object in a different process.

An interprocess message channel

10. What keyword is added to a delegate to force subscribers to use += or =?

event

this

delegate

none of the above