C++ Programming By Example - Building a Sorting Application

The video tutorial covers the creation of a basic phone book application using C++. It explains the use of type aliases and the pair class for managing contacts. The tutorial demonstrates sorting contacts by name and phone number using predicates and introduces tuples for handling multiple fields. It also covers creating predicate functions for sorting and using the copy_if algorithm to search contacts based on specific criteria.

What is the purpose of using a type alias in the phone book application?

• To reduce memory usage

• To simplify code readability

• To increase execution speed

• To enhance security

Which STL class is used to store a pair of values in the phone book application?

• Pair

• Vector

• Set

• Map

What is the main advantage of using predicates for sorting contacts?

• They allow sorting in constant time

• They enable sorting based on custom criteria

• They provide built-in sorting algorithms

• They automatically optimize memory usage

Why are tuples used instead of pairs for sorting by multiple criteria?

• Tuples are easier to use

• Tuples can store more than two elements

• Tuples are faster than pairs

• Tuples are more secure

What does the less than operator do in the context of sorting tuples?

• It compares the memory addresses of tuples

• It checks if one tuple is a subset of another

• It compares elements of tuples in lexicographical order

• It swaps the elements of tuples

Which function is used to access elements in a tuple?

• access()

• get()

• retrieve()

• fetch()

How can code readability be improved when sorting contacts?

• By creating separate functions for predicates

• By using global variables

• By using inline comments

• By reducing the number of lines of code

What is the result of sorting contacts by phone number?

• Contacts are sorted by the length of phone numbers

• Contacts are sorted in reverse order

• Contacts are sorted alphabetically by phone number

• Contacts are sorted numerically by phone number

What is the purpose of the 'copy_if' algorithm in the search functionality?

• To delete contacts from the list

• To sort the contacts

• To copy all contacts to a new vector

• To filter contacts based on a condition

What is the significance of using 'back_inserter' in the search algorithm?

• It replaces elements in the vector

• It removes elements from the vector

• It appends elements to the end of the vector

• It inserts elements at the beginning of the vector