C#

1.What is an advantage of using a List over an array?

List automatically resizes itself if more space is required for additional objects.

List stores its data contiguously, which is faster than an array.

There is no advantage.

It is easier to iterate over all of the elements of a List than it is to iterate through an array's elements.

2. What does this code print?

Dictionary minivans = new Dictionary()

{

 { "Ford", "Aerostar" },

 { "Honda", "Odyssey"},

 { "Toyota", "Sienna"}

};

if(minivans.TryGetValue("Nissan", out string model))

{

 Console.WriteLine($"Nissan Model: {model}");

}

Nissan Model: Sentra

Nissan Model:

KeyNotFoundException

nothing

Nissan Model: {model}

3. What are the primary benefits of object-oriented programming? (Choose all that apply)

Polymorphism

Virtual functions

Encapsulation

Inheritance

Constructors

Abstraction

4. What class would best be used to read a file in a "plain text" format?

StreamReader

BinaryReader

XmlReader

StringBuilder

5. What types of functions can use the base initializer?

all constructors

default constructors -and- destructors

destructors

properties

6. The less you _____ the fewer ______ you'll write.

think, lines of code

debug, programs

type, bugs

care, tests

7. When casting from a derived type variable to a base type variable, that is what kind of casting?

implicit

explicit

upcasting

downcasting

8. How would you add each kind of monster to a List?

public static class MonsterFactory

{

 public static IMonster CreateFrankenstein()

 {

 return new Frankenstein("Franken Berry");

 }

 public static IMonster CreateVampire()

 {

 return new Vampire("Count Chocula");

 }

}

List monsters = new List();

monsters.Add(CreateFrankenstein());

monsters.Add(CreateVampire());

List monsters = new List();

monsters.Add(MonsterFactory.CreateFrankenstein());

monsters.Add(MonsterFactory.CreateVampire());

List monsters = new List();

monsters.Add("Franken Berry");

monsters.Add("Count Chocula");

List monsters = new List();

monsters.Add(CreateFrankenstein());

monsters.Add(CreateVampire());

List monsters = new List(); monsters.Add(MonsterFactory.CreateFrankenstein());

monsters.Add(MonsterFactory.CreateVampire());

9. Which of the following is a relational operator?

+

==

?:

[]