Deck 8: More About Processing Data

Question 1

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 1

D

Question 2

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

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

Answer 2

B

Question 3

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

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

Answer 3

A

Question 4

The ____________ methods return an integer value indicating the starting position of a substring within a string object.

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

Question 5

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

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

Question 6

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 7

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 8

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

Question 9

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

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

Question 10

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

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

Question 11

To convert a char variable to a string, call its ____________ method.

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

Question 12

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

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

Question 13

Which one of the character testing methods would you use to determine if a sentence contains capital letters?

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

Question 14

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

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

Question 15

The ____________ data type is used to store individual characters.

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

Question 16

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 17

The ____________ method places a string inside another string.

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

Question 18

The ____________ method returns the lowercase equivalent of a character.

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

Question 19

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

A) Hanging spaces
B) Trailing spaces
C) Padded spaces
D) Suffix spaces

Question 20

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

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

Question 21

The ____________ method removes specified characters from a string.

A) Delete
B) Extract
C) TrimEnd
D) Remove

Question 22

A(n) ____________ is an object you can create that contains one or more variables known as fields.

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

Question 23

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 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

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 26

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 27

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

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

Question 28

Structure objects are normally passed ____________ to a method.

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

Question 29

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

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

Question 30

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

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

Question 31

Look at the following code sample that creates an array of Pet structure objects: 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 32

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 33

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

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

Question 34

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 35

Look at the following code sample: struct Pet
{
Public string name;
Public int age;
Public string type;
}
Which one of the following statements declares a Pet structure variable 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 36

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

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

Question 37

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

A) parsing
B) tokenizing
C) object splitting
D) threading

Question 38

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 39

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

A) Remove
B) NoSpaces
C) Trim
D) RemoveSpace

Question 40

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 41

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

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

Question 42

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

Question 43

The Substring method returns a string.

Question 44

Because char variables can hold only one character, they are not assignment-compatible with string variables.

Question 45

Look at the following code sample: enum Flavor { Vanilla, Strawberry, Chocolate }
Which of the following statements assigns the Flavor enumerated type value to The integer variable?

A) int n = Flavor.Strawberry.ToInteger();
B) int n = Strawberry.IntValue;
C) int n = (Flavor) Strawberry;
D) int n = (int) Flavor.Strawberry;

Question 46

In code, you can determine the number of images 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 47

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 48

If you pass an uppercase letter to the char.ToLower method, the character it returns will be unchanged.

Question 49

The ____________ is a container that can hold multiple images.

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

Question 50

You can use a subscript expression such as name[3]='A' to change the value of a character within a string.

Question 51

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 52

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

Question 53

The string data type has several methods that allow you to search for substrings.

Question 54

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

Question 55

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 56

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

Question 57

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 58

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

Question 59

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

The char data type provides a single method that determines whether a character is a letter or number.

Question 61

A structure declaration does not create anything in memory until you create a new instance of the structure.

Question 62

You can assign an enumerator directly to an int variable.

Question 63

When you create a structure array, each element of the array is structure instance and the fields of each instance are initialized to either zero or null (for fields that are reference variables).

Question 64

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

Question 65

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 66

The programming terms instance and an object have the same meaning.

Question 67

You cannot perform comparison operations directly on structure objects.

Question 68

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

Question 69

When you declare an enumerated type, the enumerators are automatically assigned integer values, starting with 0, unless you provide other specific values.

Question 70

Like strings, enumerators must be enclosed in quotation marks.

Question 71

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

Question 72

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

Question 73

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

Question 74

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

Question 75

In C#, you can only provide one delimiter per string that you wish to tokenize when calling the Split method.

Question 76

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

Question 77

Enumerators and enum variables have a ToString method.

Question 78

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

Question 79

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

Question 80

Structures are value types, so a structure object contains all of its data at the variable's memory location.