Question 1

A tuple's ________ uses the assignment operator (=) to move the elements of the tuple in the right operand into a tuple of the same type in the left operand. The element types stored in the constructor argument must be copy assignable.
A) copy assignment
B) move assignment
C) copy constructor
D) move constructor

Accepted Answer

The answer of A tuple's ________ uses the assignment operator...

Question 2

Which of the following statements about regular expressions is true.
A) The set of braces containing two numbers, {n,m}, matches between n and m occurrences (inclusively) of the pattern that it quantifies.
B) All of the regular expression quantifiers are greedy; they'll match as many occurrences of the pattern as possible until the pattern fails to make a match.
C) If a quantifier is followed by a question mark (?), the quantifier becomes lazy and will match as few occurrences as possible as long as there is a successful match.
D) All of the above.

Accepted Answer

A is true - the {n,m} quantifier specifies a range of occurrences for a pattern.
B is true - all regular expression quantifiers are greedy by default, meaning they will match as much as possible.
C is true - adding a ? after a quantifier will make it lazy, matching as little as possible while still allowing for a successful match. 
Therefore, all of the statements are true (choice D).

Question 3

Which of the following statements about regular expressions is false.
A) Both "A*" and "A+" will match "A", but only "A*" will match an empty string.
B) "\d" matches any decimal digit.
C) The pattern "[aeiou]" matches any vowel.
D) The quantifier ? in a regular expression matches one or more occurrences of the preceding pattern.

Accepted Answer

The quantifier ? matches zero or one occurrences of the preceding pattern. It does not match one or more occurrences.

Question 4

Which of the following initializes a vector with a list initializer: A) vector integers{1, 2, 3, 4, 5, 6}; B) vector integers{1, 2, 3, 4, 5, 6}; C) vector integers(1, 2, 3, 4, 5, 6); D) None of the above.

Accepted Answer

Option B initializes a vector of integers with a list initializer. Option A misses the template argument, while option C uses parenthesis instead of braces for initialization. Option D is incorrect as there is a correct answer.

Question 5

Which of the following statements about regular expressions is false?
A) The quantifier {n,} in a regular expression matches at least n occurrences of the preceding pattern.
B) The quantifier {n,m} in a regular expression matches between n and m (inclusive) occurrences of the preceding pattern.
C) The question mark (?) quantifier matches one occurrence of the pattern that it quantifies.
D) A set of braces containing one number, {n}, matches exactly n occurrences of the pattern it quantifies.

Accepted Answer

The question mark (?) quantifier actually matches zero or one occurrence of the pattern that it quantifies, not exactly one.

Question 6

Assuming strings of the format: "Robert's birthday is 10-22-90"
What does the following regex match?
// create a regular expression
Regex expression("J.*\d[0-35-9]-\d\d-\d\d");
A) Birthdays that occur in April and that belong to people whose names begin with "J".
B) Birthdays that belong to people whose names begin with "J".
C) Birthdays that do not occur in April and that belong to people whose names begin with "J".
D) None of the above.

Accepted Answer

The regular expression matches strings that start with "J" (the letter "J" followed by any number of characters represented by ".*"). It then matches a digit between 0 and 3, or 5 to 9, followed by a hyphen, and then two digits and another hyphen, representing a date in the format "MM-DD-YY". Therefore, the regular expression matches birthdays that do not occur in April (since April is represented by the number 4) and belong to people whose names begin with "J".

Question 7

Which of the following statements is false?
A) Regular expressions are specially formatted strings that are used to find patterns in text.
B) Regular expressions can be used to validate data to ensure that it is in a particular format.
C) The regex library algorithm regex_search, returns true if any part of an arbitrary string matches the regular expression.
D) Character classes can be used with regular expressions. Character classes are C++ classes with escape sequences that represent groups of characters that might appear in a string.

Accepted Answer

The statement that is False is D. Character classes are not C++ classes, but rather they are special sequences of characters enclosed in square brackets that match any character within the brackets.

Question 8

The raw string literal R"(multiple
Lines
Of
Text)"
Is treated as the string literal
A) "multiplelinesoftext"
B) "multiple lines of text"
C) "multiple
lines
of
text"
D) raw string literals may not be treated as string literals

Accepted Answer

The prefix "R" indicates that it is a raw string literal, which means that any special characters such as "
" or "" within the string will be treated as actual characters and not escape sequences. Therefore, the string "multiple
lines
of
text" is the correct interpretation of the raw string literal provided.

Question 9

Which of the following statements is true?
A) A class with multiple base classes can inherit constructors from any of its base classes.
B) If a class inherits constructors with the same signature from two or more base classes, then the derived class must define its own version of that constructor; otherwise, a compilation error occurs.
C) When a derived class is inheriting constructors from a base class and explicitly defines a constructor, if a default constructor is needed, the derived class must define a default constructor either by using = default to tell the compiler to generate the default constructor or by explicitly defining a constructor that can be called with no arguments.
D) All of the above.

Accepted Answer

All the statements provided are true regarding inheritance and constructors in the context of object-oriented programming. A) A class can indeed inherit constructors from any of its base classes. B) If there are constructors with the same signature inherited from multiple base classes, the derived class must define its own version to avoid ambiguity. C) When a derived class explicitly defines a constructor and still needs a default constructor, it must explicitly define one, either by marking it with = default or by defining a no-argument constructor.

Question 10

C++11 enables you to define functions and constructors that receive list initializers as arguments. To do so, you specify a parameter that uses the ________ class template.
A) list_initializer
B) initializer
C) list
D) initializer_list

Accepted Answer

To receive list initializers as arguments, we need to specify a parameter of type initializer_list, which is a class template that provides a standard way to pass a list of objects to a function or constructor.

Question 11

As of C++11, C++ now supports raw string literals that have the format R"optionalDelimiter(characters)optionalDelimiter"
Which of the following statements is false:
A) The optionalDelimiter before the left parenthesis, (, and after the right parenthesis,), must be identical, if provided.
B) The parentheses are required around the characters that compose the raw string literal.
C) The compiler automatically inserts backslashes as necessary in a raw string literal to properly escape special characters like double quotes ("), backslashes (\), etc.
D) None of the above.

Accepted Answer

C++ raw string literals do not require the compiler to insert backslashes for escaping, as they are designed to take the given string exactly as it is, including special characters.

Question 12

Which of the following statements about raw string literals is false.
A) Raw string literals are restricted to use with regular expressions.
B) Raw string literals may be used in any context that requires a string literal.
C) Raw string literals may include line breaks, in which case the compiler inserts 
 escape sequences.
D) None of the above is false.

Accepted Answer

Raw string literals may be used in any context that requires a string literal, not just with regular expressions.

Question 13

Which of the following statements about regular expresions is false.
A) regex_match returns true only if the entire string matches the regular expression.
B) a-z matches any lowercase letter, and A-Z matches any uppercase letter.
C) The expression \d{5} matches any five digits.
D) The character "|" matches only the expression to its left.

Accepted Answer

The character "|" is known as the alternation operator and matches either the expression to its left or to its right.

Question 14

Which of the following statements about regular expressions is true?
A) The quantifier * in a regular expression matches one or more occurrences of the preceding pattern.
B) The quantifier + in a regular expression matches zero or more occurrences of the preceding pattern.
C) The quantifier {n} in a regular expression copies exactly n occurrences of the preceding pattern.
D) None of the above.

Accepted Answer

The quantifier * matches zero or more occurrences, + matches one or more occurrences, and {n} matches exactly n occurrences.

Question 15

A ________ iterates through the parts of a string that match a regular expression.
A) regex_iterator
B) string_iterator
C) regex_token_iterator
D) string_match_iterator

Accepted Answer

The correct choice is regex_token_iterator because this iterator allows us to iterate through the parts of a string that match a regular expression and also allows us to define which parts of the string we want to extract based on the regular expression. The other choices, regex_iterator and string_iterator, do not provide this functionality. string_match_iterator is not a valid option as it is not a standard iterator in C++.

Question 16

In a regular expression, the dot character "." matches any single character. When the dot character is followed by a(n) ________, the regular expression matches any number of unspecified characters.
A) plus sign (+)
B) question mark (?)
C) dollar sign ($)
D) asterisk (*)

Accepted Answer

The asterisk (*) is the quantifier that matches zero or more occurrences of the preceding character or group. So, when the dot character is followed by an asterisk, it will match any number of unspecified characters.

Quiz 24: C++11 Additional Features

A tuple's ________ uses the assignment operator (=) to move the elements of the tuple in the right operand into a tuple of the same type in the left operand. The element types stored in the constructor argument must be copy assignable.

Which of the following statements about regular expressions is true.

Which of the following statements about regular expressions is false.

Which of the following initializes a vector<int> with a list initializer:

Which of the following statements about regular expressions is false?

Assuming strings of the format: "Robert's birthday is 10-22-90" What does the following regex match? // create a regular expression Regex expression("J.*\\d[0-35-9]-\\d\\d-\\d\\d") ;

Which of the following statements is false?

The raw string literal R"(multiple Lines Of Text) " Is treated as the string literal

Which of the following statements is true?

C++11 enables you to define functions and constructors that receive list initializers as arguments. To do so, you specify a parameter that uses the ________ class template.

As of C++11, C++ now supports raw string literals that have the format R"optionalDelimiter(characters) optionalDelimiter" Which of the following statements is false:

Which of the following statements about raw string literals is false.

Which of the following statements about regular expresions is false.

Which of the following statements about regular expressions is true?

A ________ iterates through the parts of a string that match a regular expression.

In a regular expression, the dot character "." matches any single character. When the dot character is followed by a(n) ________, the regular expression matches any number of unspecified characters.