Deck 8: Arrays and Collections

Question 1

It is not necessary for a programmer to manipulate the subscripts of an array if they use a For / Next loop.

Answer 1

False

Question 2

When an array is initialized with the Dim Statement,the index starts at 1 instead of 0.

Answer 2

False

Question 3

The following code is valid: Dim NameString()As String = {"Theresa","Anita","Julia")

Answer 3

True

Question 4

An exception is automatically thrown if a subscript is used that is not a valid element in an array.

Question 5

A Structure is private by default,but can be declared to be Friend or Private.

Question 6

Each element in an array can have its own unique data type.

Question 7

The Structure / End Structure statements may be used to represent a record of related fields of information.

Question 8

An array is a series of values,all referenced by the same variable name.

Question 9

An array is a list or series of values.

Question 10

The following code is valid for declaring an array with ten elements: Dim EmployeeNameString(0 to 10).

Question 11

Each individual variable in an array is called a "member" of the array.

Question 12

Code to create a user-defined Structure should be placed inside the procedure in which the structure will be used.

Question 13

StudentNameString (0) is a valid position in an array that is declared with the statement: Dim StudentNameString(15)As String.

Question 14

An array is a series of individual variables,all referenced by the same name but having unique indexes.

Question 15

A subscript may also be called an index.

Question 16

A Dim statement can be used to specify initial values for the array elements.

Question 17

A Structure declaration cannot go inside a procedure.

Question 18

A For Each loop will execute even if the array contains no elements.

Question 19

Sometimes arrays are referred to as list boxes.

Question 20

The following code is valid for creating a structure named Student:
Structure Student
Dim StudentIDString As String
Dim FirstNameString As String
Dim LastNameString As String
Dim GPADecimal As Decimal
End Structure

Question 21

Collections are less sophisticated than arrays and do not define any properties or methods.

Question 22

The SelectedIndex property of a list box can be used as an array subscript to find an item in a list box.

Question 23

An array with six elements will exist in memory after the following lines of code have been executed:
Structure Vendor
Dim VendorIDString As String
Dim NameString As String
Dim PhoneString As String
End Structure
Dim BusinessVendor(5)As Vendor

Question 24

The first subscript in a multidimensional array specifies the column,and the second specifies the row.

Question 25

If an exception is thrown and the message,"Index was outside the bounds of the array." displays,this indicates _______.

A)the array is completely full of data
B)the subscript is a value greater than the number of elements declared in the array's Dim statement
C)the subscript has reached a value lower than the number of elements declared in the array's Dim statement
D)The answer could be B or C

Question 26

"Vendor" is the name of the array in the following code:
Structure Vendor
Dim VendorIDString As String
Dim NameString As String
Dim PhoneString As String
End Structure
Dim BusinessVendor(5)As Vendor

Question 27

Which of the following code samples is valid for accumulating the total sales for the Tigers baseball club if the Tigers are the second group in the list?

A)SalesDecimal += TotalSalesDecimal(1)
B)SalesDecimal += TotalSalesDecimal(2)
C)TotalSalesDecimal(1)+= SalesDecimal
D)TotalSalesDecimal(2)+= SalesDecimal

Question 28

When you are working with an array,the easiest way to traverse the elements is to use the _______.

A)If / Then statement
B)Next statement
C)For Each / Next statement
D)Case structure

Question 29

Declare an array and specify the number of elements using _______.

A)the ListCount property
B)the ListIndex property
C)an Array statement
D)a Dim statement

Question 30

The individual variables in an array are accessed by their _______,which is their position in the array.

A)dimension
B)ListCount property
C)subscript
D)ItemCount property

Question 31

The SortedList collection automatically sorts entries as they are added to the collection.

Question 32

Given the following code,which of the choices below would be used to access the phone number of the 3rd vendor? Private Structure Vendor
Dim VendorIDString As String
Dim NameString As String
Dim PhoneString As String
End Structure
Dim BusinessVendor(5)As Vendor

A)BusinessVendor(2).PhoneString
B)Vendor(2).PhoneString
C)PhoneString(2).Vendor
D)BusinessVendor(2)

Question 33

A VB programmer can combine multiple fields of related data using a _______.

A)DataType statement
B)Structure statement
C)For Each statement
D)Public statement

Question 34

A table lookup is used to find a match for a specific value (or string)by comparing it to each element in an array.

Question 35

In the following statement,_______,refers to the array, For Each OneSchoolString In SchoolString

A)For Each
B)OneSchoolString
C)In
D)SchoolString

Question 36

There are several collections defined in .NET to help programmers manage in-memory data.

Question 37

An array is a set of variables.Each individual variable is called _______.

A)a subscript
B)an element
C)a subscripted variable
D)an index

Question 38

How many elements are contained in the array created with the following code? Dim EmployeeString(25)As String

A)0 (The code is incorrect to create an array. )
B)24
C)25
D)26

Question 39

A table lookup can be used to look up array elements indirectly.

Question 40

Array elements may be used for counters and accumulators.

Question 41

When you have data stored in a SortedList,you can access the elements using the

A)Nickname
B)Index
C)Key
D)B and C are correct.

Question 42

When performing a table lookup,it is a good idea to include validation because _______.

A)when looking for a table it is very likely that the table will not exist
B)the user should be notified if there is no match found in the table
C)validation will add a new element to the table if no match is found
D)it will cause the lookup to perform much faster than without validation

Question 43

__________ can be used to find a specific value in an array.

A)The Find method of an array
B)A table lookup
C)The Locate.Item property
D)A Case structure

Question 44

Write a structure called Student that contains the following items:
Last Name,First Name,Student ID,CurrentG.P.A.
Structure Student
Dim LastNameString As String
Dim FirstNameString As String
Dim StudentIDString As String
Dim ClassNameString As String
Dim CurrentGPADecimal As Decimal
Dim OverallGPADecimal As Decimal
End StructureG.P.A. ,and Overall

Question 45

Write a declaration statement for a SortedList object named MyList,accessible to all classes in the project.

Question 46

_______ can be used when two subscripts are needed to identify tabular data,such as when data is arranged in rows and columns.

A)Complex subscripts
B)List boxes
C)Text boxes
D)Multidimensional arrays

Question 47

Dimension a variable that can be used for a seating chart that will hold student names in a classroom that has 5 tables,each with 7 chairs.

Question 48

Which of the following is not a .NET Collection type?

A)ArrayList
B)Queue
C)Turnstyle
D)Stack

Question 49

after the following declaration is initialized? Dim NameString ( ,)As String = { "James","Mary"},{ "Sammie","Sean"}

A)James
B)Mary
C)Sammie
D)Sean

Question 50

Explain the difference between a For/Next loop and a For Each/Next loop when traversing an array.