Question

12. Which of the following is not a property of LinkedListNode?

	a.Value
	b.Reference
	c.Previous
	d.Next

13. Which of the following statements is false?

	a.Lambda expressions allow you to define simple, anonymous methods.
	b.A lambda's return type is listed to the left of the lambda.
	c.A delegate can hold a reference to a lambda expression that has a signature that's compatible with the delegate type.
	d.A lambda expression is called via a variable that references it.

15. In functional programming, you specify ________ you want to accomplish in a task, but not ________ to accomplish it.

	a.how, what
	b.when, how
	c.what, when
	d.what, how

16. Which of the following statements about functional programming is false?

	a.You do not need to specify how to iterate through the elements or declare and use any mutable (that is, modifiable) variables. This is known as internal iteration, because the library code (behind the scenes) iterates through all the elements to perform the task.
	b.A key aspect of functional programming is immutability—not modifying the data source being processed or any other program state, such as counter-control variables in loops. This eliminates common errors that are caused by modifying data incorrectly.
	c.A filter operation combines the elements of a collection into a single new value, typically using a lambda that specifies how to combine the elements.
	d.A map operation results in a new collection in which each element of the original collection is mapped to a new value (possibly of a different type). The new collection has the same number of elements as the collection that was mapped.

18. The compiler converts LINQ queries into calls to ________, many of which have delegate parameters.

	a.instance methods
	b.constructors
	c.extension methods
	d.void methods

20. Which of the following statements is false?

	a.The LinkedList class is a singly linked list.
	b.The LinkedList class's enumerator loops over the values of the nodes, not the nodes themselves.
	c.One LinkedListNode cannot be a member of more than one LinkedList.
	d.Method Find performs a linear search on the list and returns the first node that contains a value equal to the passed argument.

Answer 1

12) Reference
13) A lambda’s return type is listed to the left of the lambda.
15) what, how
16) A filter operation combines the elements of a collection into a single new value, typically using a lambda that specifies how to combine the elements.
18) extension methods
20) The LinkedList class is a singly linked list.