GATE DA 2026 Set 1 — Question 12
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Machine Learning → Model Evaluation & Validation → Leave-One-Out CV
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Question
Consider that you are training a classifier for a 10-class classification problem. Each input is represented as a 512-dimensional vector. There are 1000 samples, out of which first 100 will be used for testing. Let Leave-One-Out-Cross-Validation (LOOCV) be used for selection of the classifier model before testing.Which of the following options is the correct number of validation splits that will be generated?
Correct answer
(C) 900
Solution
Total number of samples is 1000. The first 100 samples are set aside for testing. This leaves samples available for training and model selection.Leave-One-Out Cross-Validation (LOOCV) is performed on the training dataset. In LOOCV, for a dataset of size , the model is trained times, each time leaving out one sample for validation and using the remaining samples for training. Therefore, the number of validation splits (folds) is equal to the number of samples in the training set.Since the training set size is 900, there will be 900 validation splits.
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