41. Explain the purpose of the friend keyword and its implications.
42. How do you use std::filesystem for file manipulation in C++17?
43. What is the role of std::condition_variable in thread synchronization?
44. How do you implement a generic observer pattern in C++?
45. Explain the importance of benchmarking in C++ development.
46. How do you implement a logging library with varying severity levels?
47. What are the best practices for writing unit tests in C++?
48. How do you use C++20 modules to improve code organization?
49. Explain the concept of data races and how to prevent them.
50. How do you implement a custom allocator for STL containers?
51. What are the performance implications of using virtual functions?
52. How do you create a plugin system in C++?
53. Explain the differences between std::deque and std::vector.
54. How do you manage dependencies in large C++ projects?
55. What is the purpose of the using directive and using declarations?
56. How do you implement an event-driven architecture in C++?
57. Explain the differences between shallow copy and deep copy.
58. How do you use std::initializer_list to create a constructor?
59. What are the key principles of object-oriented programming in C++?
60. How do you implement a basic JSON parser using C++?
61. What is the role of std::reference_wrapper in C++?
62. How do you create a generic data structure using templates?
63. Explain the purpose of std::array and its advantages over C-style arrays.
64. How do you implement a multi-threaded application with shared data?
65. What are the advantages of using std::unordered_set over std::set?
66. How do you implement a simple command pattern in C++?
67. What is the significance of using std::future and std::promise?
68. How do you use std::move and std::forward in template functions?
69. Explain the differences between std::thread and std::async.
70. How do you implement a basic network protocol in C++?
71. What are the performance implications of using inline functions?
72. How do you manage versioning in C++ libraries?
73. What is the role of std::variant in type-safe unions?
74. How do you use lambda expressions for callback functions?
75. Explain the significance of the static_assert keyword.
76. How do you implement a custom exception handler in C++?
77. What are the best practices for managing memory in C++?
78. How do you implement a simple HTTP server in C++?
79. What is the purpose of std::lock_guard and how is it used?
80. How do you use the chrono library for time measurements?