Deck 17: Strings and Characters: a Deeper Look

Question 1

The Unicode character set has the same characters as ASCII.

Answer 1

False

Question 2

Strings are immutable-a String's character contents cannot be changed after it is created.

Answer 2

True

Question 3

In the declaration: Dim color As String = "blue"

A)the String literal color is assigned to the String variable "blue"
B)the String variable color is assigned to the String literal "blue"
C)the String literal "blue" is assigned to the String variable color
D)None of the above

Answer 3

C

Question 4

If an index goes beyond the bounds of an array:

A)an ArgumentOutOfBoundsException is thrown.
B)a BoundsException is thrown.
C)an ArgumentOutOfRangeException is thrown.
D)a RangeException is thrown.

Question 5

The expression New String("C"c,5)creates a string with the value: "CCCCC".

Question 6

You can find patterns in Strings by using classes Regex and Match.

Question 7

The Regex and Match classes are found in the System.Text namespace.

Question 8

Visual Studio treats _______ as delimiters for Strings and does not treat them as part of a String.

A)single quotes
B)double quotes
C)parentheses
D)None of the above

Question 9

Which of the following cannot be used to store a sequence of characters?

A)String
B)StringBuilder
C)Regex
D)An array of Chars
E)None of the above.

Question 10

Class String and the Char structure are found in the:

A)System.Strings namespace
B)System.Chars Namespace
C)System.Text namespace
D)System namespace

Question 11

A String cannot be made directly from an array of characters.

Question 12

When using the String constructor with arguments (Char,Integer),the character is repeated the number of times specified by the integer.

Question 13

A string literal:

A)contains only one character.
B)contains numbers rather than letters.
C)is a sequence of characters in double quotation marks.
D)contains only its variable name and nothing else.

Question 14

The expression New String("America",4,2)creates a string with the value:

A)"meri"
B)"ire"
C)"ri"
D)"ic"
E)Nothing

Question 15

When creating a String object,if a character array and two integers are passed to the String constructor,then the created String contains:

A)the characters of the array from the index specified by the first integer for the number of characters represented by the second integer.
B)the characters of the array from the index specified by the first integer to the index specified by the second integer.
C)all of the characters except those between the indices represented by the two integer values.
D)None of the above.

Question 16

The bounds on a String are always:

A)0 to myString.Length.
B)1 to myString.Length.
C)0 to myString.Length - 1.
D)1 to myString.Length - 1.

Question 17

A sequence of characters in double quotation marks is often called a String reference.

Question 18

Characters consist of only the uppercase and lowercase alphabets.

Question 19

Characters can be:

A)uppercase letters
B)lowercase letters
C)digits
D)All of the above

Question 20

A character constant is an integer value that represents a character.

Question 21

When a number is passed as an argument for a String indexer,it returns that many characters starting from the first.

Question 22

The first argument given to method CopyTo is a character array into which the characters are copied.

Question 23

A comparison of the String "hello" with the String "HELLO",using method Equals,would return True.

Question 24

The CompareTo method returns a 1 if the invoking String is less than the argument,a -1 if the invoking String is greater,and a 0 if they are the same.

Question 25

Lexicographical comparison refers to the comparison of two Strings based on their characters' Unicode values.

Question 26

When using the LastIndexOf method with three arguments,the second parameter specifies:

A)the length of the substring to search
B)the starting index from which to begin the search
C)the ending index from which to begin the search
D)the string to search for

Question 27

The way to find out if two Strings are equal is:

A)the Equals method
B)the CompareTo method
C)the = operator
D)All of the above

Question 28

String indexers treat strings as:

A)binary code
B)ASCII code
C)arrays of characters
D)a character

Question 29

The Equals method is used to see if:

A)two Strings are exactly the same.
B)two Strings start with the same letter.
C)the ASCII sum of both Strings are the same.
D)the two Strings have the same letter in the same position anywhere in the strings.

Question 30

There is no direct way of converting a String to a character array.

Question 31

Given the literal String object string1 = "hello there",then string1.Length = 10.

Question 32

The StartsWith and EndsWith methods see if a String starts or ends with the given character or String.

Question 33

To obtain a single character from a string,the string is indexed like an array of characters.

Question 34

Passing an index greater than zero,but less than or equal to the length of the String will result in an IndexOutOfRangeException.

Question 35

When comparing "a" to "_" the correct result would be:

A)"a" is greater
B)they are equal
C)"_" is greater
D)there is no way to compare "_" to "a"

Question 36

The Length property returns the length of a String.

Question 37

The letter "Z" (uppercase)is greater than the letter "b" (lowercase).

Question 38

The String method xe "CopyTo method of class String"CopyTo copies a specified number of characters from a:

A)Char array into a String
B)String into a Char array
C)String into a Integer array
D)All of the above

Question 39

Method xe "StartsWith method of class String"StartsWith takes two arguments.

Question 40

One String is less than another String if the first comes before the second alphabetically.

Question 41

If a Substring method is passed only one argument then that argument must specify:

A)the starting index from which the method copies
B)the ending index to which the method copies
C)the number of copies the method will output
D)the length of the substring to be copied

Question 42

Method LastIndexOf is used to find the last occurrence of given text in a string.

Question 43

ToUpper( string )is

A)a way of converting a String to all upper cases.
B)a way to make the first letter of every word in a String a capital letter.
C)a way of making one String more important than the rest.
D)a syntax error.

Question 44

Concatenating two Strings merges the two Strings into another String.

Question 45

Concatenating with Strings is done with:

A)reserved words.
B)method calls.
C)operator overloading.
D)operator overloading and method calls.

Question 46

If an IndexOfAny method is passed a string it:

A)finds the first occurrence of each letter in the string
B)searches for the first occurrence of any of the characters in the string
C)will search for the first occurrence of the sequence of characters
D)generates an error

Question 47

What does the following code print out?

A)_Pr
B)_Prog
C)Pro
D)Progr

Question 48

What will executing the following snippet of code do?
Dim example As String = "Good"
Example &= " Books"

A)This will produce an error.
B)This will not produce an error;however,line 2 will not change the String example.
C)This will not produce an error,and example's value becomes " BooksGood".
D)This will not produce an error,and example's value becomes "Good Books".

Question 49

In order to concatenate a String with another String you can use the Concat method.

Question 50

Method xe "Concat method of class String"Concat is not a Shared method.

Question 51

String method IndexOfAny returns an ElementNotFoundException when the argument is not found within the String.

Question 52

Another way to concatenate a String is to place the dot operator (. )between the two Strings.

Question 53

If a method's arguments cause it to access an index of the String that's beyond its length,the program will retrieve whatever is in that memory location.

Question 54

Which of the following is not a String method:

A)IndexOf
B)IndexOfAll
C)IndexOfAny
D)LastIndexOfAny

Question 55

The IndexOf method will return the indices of all occurrences of the given string.

Question 56

When a programmer passes two integers as arguments for the Substring method,what is returned?

A)The characters from the first integer to the second
B)As many characters as the second integer starting at the first integer
C)As many characters as the first integer starting at the second integer
D)no return is made;an error occurs

Question 57

String.Concat(string1,string2)has the same result as string1 & string2.

Question 58

If an IndexOfAny method is passed an array of characters it:

A)finds the first occurrence of each letter in the String
B)searches for the first occurrence of any of the characters in the String
C)will search for the first occurrence of the sequence of characters
D)generates an error

Question 59

The proper way to convert a string to all lowercase is:

A)Char.ToLower( string )
B)ToLower( string )
C)string.ToLower()
D)string.ToLower( string )

Question 60

Each Substring method returns a new String object.

Question 61

Method Trim returns a copy of a String with all non-whitespace charcters eliminated.

Question 62

Method Replace can be used to get a copy of a String in which all occurrences of a desired character are changed to another character.

Question 63

Which of the following String methods does not modify the original String?

A)Method Replace
B)Method ToUpper
C)Method ToLower
D)All of the above

Question 64

When appropriate,using String objects instead of StringBuilder objects improves performance.

Question 65

Strings cannot be changed.

Question 66

Properties Length and Capacity are used (respectively)to return the number of characters and the total length allowed (at that time)of the String Builder.

Question 67

The keyword Nothing is the same as the empty String,"".

Question 68

String objects are ________ and StringBuilders are __________.

A)immutable,immutable
B)immutable,mutable
C)mutable,immutable
D)mutable,mutable

Question 69

Method ToString is not a member of class:

A)String
B)Object
C)StringBuilder
D)None of the above

Question 70

The ToUpper and ToLower methods can be used to return a copy of a String in all uppercase or lowercase letters,respectively.

Question 71

In order to set a string to reference Nothing you must use:

A)string1 = Nothing
B)string1 = ""
C)string1 = ''
D)Either a.or b.

Question 72

Method EnsureCapacity is used to return the capacity of a String Builder.

Question 73

After method EnsureCapacity doubles the StringBuilder instance's current capacity,if the new capacity is still lower than the value that the programmer wishes to ensure:

A)EnsureCapacity doubles capacity again
B)EnsureCapacity sets capacity to the requested number
C)EnsureCapacity sets capacity to one more than the requested number
D)None of the above

Question 74

When using the Replace method,the first character passed in is the character to be replaced and the second is what it will be replaced by.

Question 75

If two StringBuilder objects contain the same string,then

A)they represent the same location in memory
B)they are two different objects
C)if one changes,so will the other
D)None of the above

Question 76

The ToString method can convert a StringBuilder into a String.

Question 77

When the Trim method is passed a character array,it returns a String without any of the characters found within that array.

Question 78

Exceeding the capacity of a StringBuilder causes the program to throw an OutOfRangeException.

Question 79

Each StringBuilder has a limit of characters that cannot be exceeded.

Question 80

Class xe "StringBuilder class"StringBuilder is used to:

A)create Strings
B)manipulate Strings
C)modify Strings
D)All of the above