Deck 8: More About Processing Data

Question 1

A string object's ____________ method returns true if the substring being searched for is contained within the string, otherwise it returns false.

A) Contains
B) Substring
C) IndexOf
D) Insert

Answer 1

A

Question 2

Look at the following code sample: string tree = "Pear";
Char letter = tree[3];
Which one of the following values is stored in the letter variable?

A) P
B) e
C) a
D) r

Answer 2

D

Question 3

When you need to convert a char variable to a string, you can call its ____________ method.

A) CompareTo
B) ToString
C) Equals
D) GetType

Answer 3

B

Question 4

The ____________ method inserts a string into another string.

A) Remove
B) Trim
C) Insert
D) Substring

Question 5

____________ are spaces that appear at the end of a string.

A) Hanging spaces
B) Trailing spaces
C) Padded spaces
D) Reverse tabs

Question 6

The ____________ method returns true if a string object ends with a substring value or false otherwise.

A) LastIndexOf
B) Substring
C) TrimEnd
D) EndsWith

Question 7

Subscript notation provides ____________ access to the individual characters in a string.

A) write-only
B) local
C) read-only
D) global

Question 8

Which one of the following character testing methods would you use to determine if a character is a number in the range 0 through 9?

A) char.IsDigit
B) char.IsLower
C) char.IsPunctuation
D) char.IsWhiteSpace

Question 9

____________ are spaces that appear at the beginning of a string.

A) Leading spaces
B) Empty spaces
C) Indentations
D) Tabbed spaces

Question 10

A string within a string is called a(n) ____________.

A) thread
B) nested string
C) strand
D) substring

Question 11

Which one of the character testing methods would you use to determine that a string contains only letters and numbers?

A) char.IsLetterOrDigit
B) char.IsUpper
C) char.IsPunctuation
D) char.IsWhiteSpace

Question 12

The ____________ method returns true if the string object starts with the substring or false otherwise.

A) Contains
B) TrimStart
C) StartsWith
D) IndexOf

Question 13

The ____________ method returns the lowercase equivalent of a character.

A) char.IsLower
B) char.ToLower
C) this.Lowercase
D) this.char.Convert

Question 14

C# allows you to access the individual characters in a string using ____________.

A) switch statements
B) subscript notation
C) named constants
D) character literals

Question 15

Which one of the following character testing methods would you use to verify whether or not a password contains spaces?

A) char.IsPunctuation
B) char.IsUpper
C) char.IsWhiteSpace
D) char.IsLetterOrDigit

Question 16

The ____________ data type is used to store individual characters.

A) bool
B) string
C) char
D) int

Question 17

The ____________ can be used to retrieve a specific set of characters from a string.

A) Insert method
B) Substring method
C) Trim method
D) Contains method

Question 18

In C#, ____________ are enclosed in single quotation marks.

A) character literals
B) numeric literals
C) string literals
D) Boolean literals

Question 19

The ____________ methods return an int value indicating the position of the substring being searched for in the string object.

A) IndexOf and LastIndexOf
B) Insert and Remove
C) ToUpper and ToLower
D) Substring and Trim

Question 20

Which one of the character testing methods would you use to determine if a sentence uses proper capitalization?

A) char.IsUpper
B) char.IsLetterOrDigit
C) char.IsPunctuation
D) char.IsWhiteSpace

Question 21

Look at the following code sample: struct Pet
{
Public string name;
Public int age;
Public string type;
}
Which one of the following statements declares an instance of a Pet structure named hound and initializes the object's fields with their default values?

A) new Pet = hound;
B) Pet hound = new Pet();
C) hound = new Pet();
D) Pet hound;

Question 22

Look at the following code sample: struct Pet
{
Public string name;
Public int age;
Public string type;
}
Const int SIZE = 4;
Pet[] cats = new Pet[SIZE];
Which one of the following statements assigns the string "Pickles" to the name member of cats[2]?

A) "Pickles" = cats[2];
B) cats[2].name = "Pickles";
C) cats.name[2] = "Pickles";
D) cats[2].name("Pickles");

Question 23

The ____________ method removes all leading and trailing spaces from a string.

A) Remove
B) ToLower
C) Trim
D) ToUpper

Question 24

Look at the following code sample: struct Pet
{
Public string name;
Public int age;
Public string type;
}
List birdList = new List();
Pet parrot = new Pet();
Which one of the following statements adds the Pet structure named parrot to the List object named birdList?

A) birdList.Add(parrot);
B) Add(birdList.parrot);
C) birdList[parrot];
D) birdList[0] = parrot;

Question 25

When the items in two data structures are related by their indexes, it is said that a(n) ____________ exists between the data structures.

A) exclusive association
B) logical connection
C) parallel relationship
D) binary link

Question 26

Look at the following code sample: struct Pet
{
Public string name;
Public int age;
Public string type;
}
Pet hound = new Pet();
Which one of the following statements assigns the string "Beagle" to the hound object's type field?

A) hound = new type("Beagle");
B) type = "Beagle";
C) hound.type = "Beagle";
D) Pet.hound.type("Beagle");

Question 27

In order to compare two structure objects, you must compare the individual ____________ of each structure object.

A) variables
B) fields
C) data types
D) objects

Question 28

The ____________ methods remove specified characters from a string.

A) Trim
B) TrimStart
C) TrimEnd
D) Remove

Question 29

The process of breaking a string into tokens is known as ____________.

A) parsing
B) tokenizing
C) lexical analysis
D) threading

Question 30

A(n) ____________ is a data type you can create that contains one or more variables known as fields.

A) object
B) structure
C) list
D) container

Question 31

The character that separates tokens is known as a(n) ____________.

A) sentinel
B) article
C) delimiter
D) separator

Question 32

Before you can use a structure to store data, you must create a(n) ____________ of the structure in memory.

A) copy
B) identity
C) instance
D) field

Question 33

Before tokenizing a string, you should use the ____________ method to remove leading and/or trailing white-space characters and prevent them from being included in the first and last tokens.

A) Trim
B) Remove
C) Split
D) Substring

Question 34

In programming terms, ____________ are a series of words or other items of data contained in a string that are separated by spaces, commas, or other characters.

A) tokens
B) lexicons
C) delimiters
D) key values

Question 35

Structure objects are normally passed ____________ to a method.

A) by reference
B) globally
C) by value
D) locally

Question 36

A(n) ____________ is a data type you can create by specifying a set of symbolic values that belong to that data type.

A) class
B) structure
C) namespace
D) enumerated data type

Question 37

Look at the following code sample: enum Flavor { Vanilla, Strawberry, Chocolate }
The identifiers Vanilla, Strawberry, and Chocolate, which appear inside the braces, are known as ____________.

A) constants
B) references
C) mnemonics
D) enumerators

Question 38

In C#, string objects have a method named ____________ that is used to tokenize the string.

A) Tokenize
B) Delimit
C) Break
D) Split

Question 39

Assuming that cat1 and cat2 are both instances of the Pet structure, which one of the following statements assigns cat1 to cat2?

A) cat1 = cat2;
B) cat2 = cat1;
C) cat1(cat2);
D) cat1 = new cat2;

Question 40

When the data in a spreadsheet is exported using the ____________ file format, each row is written to a line, and the values of the cells are separated by commas.

A) comma separated value, or CSV
B) extensible markup language, or XML
C) document object model, or DOM
D) delimiter separated value, or DSV

Question 41

The ____________ is a container that can hold multiple images.

A) ImageList control
B) PictureBox control
C) Panel control
D) Bitmap

Question 42

Enumerators and enum variables can be compared directly with ____________ values.

A) int
B) decimal
C) double
D) string

Question 43

Character testing methods, such as char.IsLetter, return a Boolean value of.

Question 44

You can convert an enumerator to its underlying integer type by using a(n) ____________.

A) binary operator
B) cast operator
C) reference variable
D) assignment statement

Question 45

Look at the following code sample: enum Flavor { Vanilla, Strawberry, Chocolate }
Flavor iceCreamFlavor = Flavor.Strawberry;
MessageBox.Show(iceCreamFlavor + " is my favorite!");
Which one of the following strings will be displayed in the message box?

A) Strawberry is my favorite!
B) Flavor.Strawberry is my favorite!
C) iceCreamFlavor is my favorite!
D) iceCreamFlavor + is my favorite!

Question 46

When you call a string object's Split method, the method extracts tokens from the string and returns them as an array of strings.

Question 47

Because char variables can hold only one character, they are not compatible with strings.

Question 48

String subscripts must be at least 0, and they must be less than the length of the string.

Question 49

Objects of the string data type have several methods that allow you to search for substrings.

Question 50

When working with strings, you can use a subscript expression to change the value of a character.

Question 51

The Substring method returns a string.

Question 52

A variable of the char data type can hold up to 256 characters at a time.

Question 53

A string object's ToUpper method converts the first character in the string to uppercase.

Question 54

Which one of the following is not a valid enumerated type declaration?

A) enum Iron { Melting = 2795, Boiling = 4982 }
B) enum SpeedLimit { City = 35, Highway = 60 }
C) enum Temperature { Cold = 20, Hot = 90 }
D) enum Voltage { Orange = 3.3, Green = 5.0 }

Question 55

If the argument is already uppercase, the char.ToLower method returns it unchanged.

Question 56

The char data type provides several methods for testing the value of a character.

Question 57

In code, you can determine the number of images that are stored in an ImageList control by getting the value of the control's ____________ property.

A) Image.List.Max
B) Size.Get
C) Images.Count
D) GetLastImage

Question 58

Look at the following code sample: enum Flavor { Vanilla, Strawberry, Chocolate }
Flavor iceCreamFlavor;
Which one of the following statements assigns the value Flavor.Vanilla to the iceCreamFlavor variable?

A) iceCreamFlavor.Vanilla;
B) iceCreamFlavor = Flavor.Vanilla;
C) iceCreamFlavor(Flavor.Vanilla);
D) iceCreamFlavor = Flavor[0];

Question 59

The methods for modifying strings do not actually modify the calling string object, but they return a modified copy of the calling string object.

Question 60

If you know the ____________ value for a particular image, you can retrieve that image from the ImageList control and display it in a PictureBox.

A) reference
B) index
C) Boolean
D) image

Question 61

When you create a structure array, each element of the array is structure instance and the fields of each instance are initialized to 0 or null if the field is a reference variable.

Question 62

You can use the assignment operator (=) to assign one structure object to another.

Question 63

You can assign an enumerator directly to an int variable.

Question 64

You cannot perform comparison operations directly on structure objects.

Question 65

Structures are value types, so creating an instance of a structure is as simple as declaring a variable.

Question 66

When you are tokenizing a string that was entered by the user and you are using characters other than white spaces as delimiters, you do not need to trim the string before tokenizing it.

Question 67

Once you have created an instance of a structure, you can access its fields using the dot operator (a period).

Question 68

A structure declaration does not create anything in memory.

Question 69

When you create a structure object with a simple declaration, the object's fields are initialized to their default values.

Question 70

Unlike other types of objects, you cannot pass a structure object as an argument to a method.

Question 71

The fields contained in structure must all be of the same data type.

Question 72

In C#, you can only provide one delimiter per string that you wish to tokenize.

Question 73

In programming terms, an instance and an object are the same thing.

Question 74

When you declare an enumerated type, the enumerators are assigned integer values, starting with 0.

Question 75

You can specify the values to be assigned to the enumerators in an enumerated data type.

Question 76

When you pass null as an argument to the Split method, the method tokenizes the string using the comma character as the delimiter.

Question 77

When you add a structure instance to a List, the List will contain a copy of the object.

Question 78

Enumerators and enum variables have a ToString method.

Question 79

If you find yourself using a structure for more than simply encapsulating a set of variables into a single item, you should probably use a class.

Question 80

Like strings, enumerators must be enclosed in quotation marks.