2. Which of the factors affect the performance of learner system does not include?a) Representation scheme usedb) Training scenarioc) Type of feedbackd) Good data structures

The question is asking which of the given options does not affect the performance of a learner system.

a) Representation scheme used: This is a factor that affects the performance of a learner system. The way information is represented can greatly influence how well the system can learn.

b) Training scenario: This is also a factor. The conditions under which the system is trained can impact its ability to learn effectively.

c) Type of feedback: This is another factor. The kind of feedback the system receives during the learning process can influence its performance.

d) Good data structures: While good data structures are important in programming and can help with efficiency, they do not directly affect the performance of a learner system in the context of machine learning.

Therefore, the answer is d) Good data structures.