Evaluation is the process of assessing or appraising something to determine its value or worth. It involves collecting and analyzing data to make judgments or decisions. In the context of education, evaluation is commonly used to assess students' learning and performance.

Both the examples given in the question - examining High School Certificate Examination answer books and examining Class Examination answer books - are valid examples of evaluation. Let's break down each example:

1. Examining High School Certificate Examination answer books:
- High School Certificate Examination is a formal assessment conducted at the end of high school or secondary education. It is usually a comprehensive evaluation of students' knowledge and skills in various subjects.
- Examining the answer books of this examination involves carefully reviewing and analyzing the responses provided by the students. The purpose is to assess their understanding of the subject matter, their ability to apply concepts, and their overall performance.
- The evaluation process may involve assigning marks or grades to each answer, identifying strengths and weaknesses, providing feedback, and making decisions about the students' progress or qualifications for further education or employment.

2. Examining Class Examination answer books:
- Class examinations are periodic assessments conducted during the academic year to gauge students' learning progress and understanding of the topics covered in class.
- Similar to the first example, examining the answer books of class examinations involves reviewing and analyzing the students' responses. The purpose is to assess their knowledge, comprehension, and application of the subject matter.
- The evaluation process for class examinations may vary depending on the educational institution and the specific assessment criteria. It may involve assigning marks or grades, providing feedback to students, identifying areas for improvement, and informing instructional decisions.

In summary, both the examples provided in the question are valid instances of evaluation. They involve the process of examining answer books to assess students' performance and make judgments about their learning. Evaluation plays a crucial role in education as it helps educators and institutions understand the effectiveness of their teaching methods, identify areas for improvement, and make informed decisions about students' progress and qualifications.