Chapter 9 Working with Data

Question 1

The two most common System.Array properties

Answer 1

Length: The total number of elements in all dimensions.

Rank: The number of dimensions.

Question 2

The two “copy” methods of System.Array

Answer 2

Clone: does a shallow copy

CopyTo:copies the elements of the arry to another array.

Question 3

Shallow Copy and its pitfall

Answer 3

When cloning an array with reference types, the new (cloned) array will contian the same references as the original.

Question 4

System.Collections

Answer 4

ArrayList (basic)

HashTable (key/value pair)

Queue (FIFO)

SortedList (sorted by the key value)

Stack (LIFO)

Question 5

key methods of the ArrayList class

Answer 5

Add

AddRange (multiple objects)

Insert (add to a location)