The selected algorithm integrates two or more commonly used or new algorithms, and integrates mathematical and/or logical concepts to create a new algorithm. The response identifies the algorithm’s purpose in the program and accurately describes with specificity how the algorithm achieves this purpose. The response accurately describes how two of the algorithms function independently as well as in combination to create a new algorithm. If needed, more than one area of the program code can be selected as part of the response to describe the algorithm. The selected abstraction integrates mathematical and/or logical concepts and serves to manage complexity of the program. The response indicates that an abstraction was developed and provides an accurate description with specificity of the purpose of the abstraction. The response explains how the abstraction manages complexity of the program due to the inclusion of the abstraction in the program or explains how the program would function without the abstraction.

The video demonstrates the running of at least one feature of the program that illustrates the program’s intended purpose as described in the written response or the video narration. The response describes a difficulty and an opportunity encountered (or two difficulties or two opportunities) at two points in the development of the program. The response describes how each of the difficulties and/or opportunities were resolved and incorporated as part of an incremental and iterative development process. The response must identify at least one point in the development of the program that was completed independently. When necessary, the response should include descriptions of a list(s) or procedure(s), and explains any use of parameters and return values in the abstraction. If needed, more than one area of the program code can be selected as part of the response to describe the abstraction.