Multi-Paradigm Programming with Modern C++ - Parallel STL

The video tutorial introduces parallel features added to the C++17 standard template library (STL), focusing on execution policies and new parallel algorithms. It explains the different execution policies, including sequenced, parallel, and unsequenced, and their implications for performance and limitations. The tutorial also covers new parallel algorithms like STD reduce, transform reduce, inclusive scan, and exclusive scan, highlighting their use cases and execution in parallel. Additionally, it discusses the current state of compiler support for parallel STL, noting that Microsoft and Intel compilers offer better support than GCC and Clang. The video concludes with a brief mention of threads and a transition to task-level parallelism.

What is the default execution policy in C++ STL algorithms?

• Parallel

• Parallel Unsequenced

• Sequential

• Unsequenced

What does SIMD stand for in the context of unsequenced execution?

• Sequential Instruction Multiple Data

• Single Instruction Multiple Devices

• Single Instruction Multiple Data

• Sequential Instruction Multiple Devices

Which of the following is a requirement for operations used in std::reduce?

• They must be idempotent

• They must be commutative

• They must be associative

• They must be distributive

What is the main difference between std::transform_reduce and std::reduce?

• Transform_reduce is only available in C++20

• Transform_reduce combines transformation and reduction in one step

• Transform_reduce requires operations to be commutative

• Transform_reduce does not require an execution policy

What is the primary function of the inclusive scan algorithm?

• To sort elements in parallel

• To compute a running total of elements

• To find the maximum element in a collection

• To filter elements based on a condition

Which compilers currently support parallel STL according to the video?

• Oracle and Sun

• GCC and Clang

• Microsoft and Intel

• Apple and IBM

What additional feature does exclusive scan offer over inclusive scan?

• It can only be executed sequentially

• It allows specifying an initial value for summation

• It is faster than inclusive scan

• It requires a different execution policy