STL Tutorials and Interview Questions

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Standard Template Library Interview Questions and Tutorials

Vector Interview Questions and Tutorials

• What’s std::vector and why should I use std::vector?
• 5 Different ways to Initialize a vector
• How to Iterate or Loop over a Vector?
• How to Iterate over a Vector in Reverse Order ( Backward direction )
• How does std::vector works internally ?
• How to fill a vector with random numbers in C++
• Importance of Constructors while using User Defined Objects with std::vector
• How to use vector efficiently in C++?
• std::vector and Iterator Invalidation
• Remove all occurences of an element from vector in O(n) complexity
• Be careful with hidden cost of std::vector for user defined objects
• Add elements in vector using vector::push_back
• How to Print all elements of a vector in C++
• How to initialize two dimensional Vector in C++ - (Initializing 2D Vectors / Matrix)
• How to print Two Dimensional (2D) Vector in C++ ?
• C++: Convert Array to Vector (7 Ways)
• C++: Convert vector to array (4 Ways)
• C++: Convert Set to Vector
• C++: Convert Vector to Set ( 5 Ways )
• C++: Print a vector in reverse order (5 Ways)

Deque Interview Questions and Tutorials

• What is std::deque and how deque works internally.
• deque vs vector : What to choose ?

List Interview Questions and Tutorials

• std::list Tutorial and Usage Details
• Vector vs List
• Different Ways To Initialize a List
• Erase elements from List using Iterators
• Removing elements from a List based on Criterion
• Remove Elements from a List while Iterating
• How to get element by index in List ?
• How to search an element in std::list ?

Set Interview Questions and Tutorials

• Set usage details with default sorting criteria
• Using std::set with user defined classes
• std::set and external Sorting criteria | Comparator
• How to access an element by index in Set
• Different ways to insert elements in Set
• How to Iterate over a Set in C++
• Removing an element from Set using different techniques.
• Erase elements while Iterating over Set & Generic erase_if()

Map Interview Questions and Tutorials

• std::map Tutorial Part 1: Usage Detail with examples
• std::map Tutorial -Part 2: std::map and External Sorting Criteria / Comparator
• std::map Tutorial – Part 3: Using User defined class objects as keys in std::map
• Set vs Map : How to choose a right associative container ?
• How to Insert elements in a map
• How to Iterate over a map in C++
• Map Insert Example
• Iterate a map in reverse order
• Check if a key exists in a Map
• Search by value in a Map
• C++ Map :  Erase by Key | Iterators
• C++ Map : Operator []
• C++ Map : Erase by Value or callback
• Using STL to verify brackets or parentheses combination in an expression

Unordered_map Interview Questions and Tutorials

• Basic Usage Detail and Example
• Initializing an unordered_map
• Searching in unordered_map
• Insert elements in unordered_map
• Erasing an element
• Erase elements while iterating
• std::map vs std::unordered_map

Unordered_set Interview Questions and Tutorials

• Unordered_set Basic Example
• Initializing an unordered_set
• Inserting elements in an unordered_set
• Searching an element in unordered_set
• Unordered_set – Custom Hasher & Comparator
• Unordered_set & User defined classes

STL Algorithm Interview Questions and Tutorials

• Using std::find & std::find_if with User Defined Classes
• Iterating over a range of User Defined objects and calling member function using std::for_each
• std::for_each Tutorial : Usage Details with Examples