Multi-Paradigm Programming with Modern C++ - Compile-Time Evaluation Using constexpr

The video tutorial explains the concept of compile-time evaluation and its benefits, such as improved performance and code readability. It introduces the 'constexpr' keyword, which allows functions and variables to be evaluated at compile time, enabling their use in static assertions. The tutorial demonstrates practical applications of 'constexpr', including converting degrees to radians and calculating cosine values using Taylor series. It also covers the creation of compile-time arrays for optimization, highlighting how precision affects executable size.

What is one benefit of compile-time evaluation mentioned in the video?

• It enables runtime error checking.

• It allows for dynamic memory allocation.

• It simplifies debugging by removing all errors.

• It improves code readability by computing constants.

What is the primary purpose of using 'constexpr' in C++?

• To allow functions to be used in static assertions.

• To improve the speed of runtime execution.

• To ensure expressions are evaluated at runtime.

• To enable dynamic type checking.

Which of the following is NOT a requirement for a 'constexpr' function?

• The function parameters must be of literal types.

• The function body can only contain literal type local variables.

• The function can contain static local variables.

• The function must return a literal type.

How can you test a 'constexpr' function immediately?

• By using a runtime assertion.

• By using a static assert.

• By running the program in debug mode.

• By compiling the code without errors.

What is a practical application of 'constexpr' discussed in the video?

• Implementing multithreading.

• Performing file I/O operations.

• Calculating cosine values using Taylor series.

• Creating dynamic arrays at runtime.

What happens to the executable size when precision is increased in compile-time arrays?

• The executable size remains the same.

• The executable size becomes unpredictable.

• The executable size decreases.

• The executable size increases.

What effect does removing 'constexpr' have on the calculation of values?

• Values are no longer calculated.

• Values are calculated at runtime.

• Values are calculated at compile time.

• Values are calculated twice.