Introduction:
Numerical Answer Type (NAT) questions are a type of questions asked in the Graduate Aptitude Test in Engineering (GATE) for Computer Science Engineering (CSE) aspirants. These questions require candidates to provide a numerical value as the answer, rather than selecting from multiple choices. The evaluation of NAT questions in GATE CSE follows a specific process to ensure fairness and accuracy.

Evaluation Process:
The evaluation of NAT questions in GATE CSE involves the following steps:

Step 1: Answer Submission:
Candidates are provided with a virtual calculator to perform calculations and input their answer as a numerical value. They need to enter the answer up to a specified decimal place accuracy, as mentioned in the question.

Step 2: Checking for Correctness:
The entered answer is checked for correctness by comparing it with the expected answer. If the entered answer matches the expected answer exactly, it is considered correct.

Step 3: Tolerance Range:
To account for minor variations due to rounding errors, a tolerance range is defined. If the entered answer falls within this tolerance range of the expected answer, it is considered correct. The tolerance range ensures that small variations in the answer do not affect the final evaluation.

Step 4: Partial Marks:
In some cases, partial marks may be awarded if the entered answer is within a specified distance from the expected answer, but outside the tolerance range. This encourages candidates to provide answers that are close to the correct value.

Step 5: No Negative Marking:
Unlike multiple-choice questions, NAT questions do not have negative marking. This means that even if the entered answer is incorrect or outside the tolerance range, no negative marks are deducted.

Step 6: Final Scoring:
The final score for NAT questions is calculated based on the correctness of the entered answer. If the answer is correct or falls within the tolerance range, full marks are awarded. If the answer is within the partial marks range, partial marks are awarded. No marks are deducted for incorrect answers.

Conclusion:
The evaluation of Numerical Answer Type (NAT) questions in GATE CSE involves a systematic process to ensure fairness and accuracy. Candidates need to provide the answer as a numerical value, which is then checked for correctness and compared with the expected answer. A tolerance range is defined to account for minor variations, and partial marks may be awarded in some cases. There is no negative marking for NAT questions, allowing candidates to provide their best attempt without the fear of losing marks.