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NEW QUESTION: 1
You are evaluating a Python NumPy array that contains six data points defined as follows:
data = [10, 20, 30, 40, 50, 60]
You must generate the following output by using the k-fold algorithm implantation in the Python Scikit-learn machine learning library:
train: [10 40 50 60], test: [20 30]
train: [20 30 40 60], test: [10 50]
train: [10 20 30 50], test: [40 60]
You need to implement a cross-validation to generate the output.
How should you complete the code segment? To answer, select the appropriate code segment in the dialog box in the answer area.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Explanation:
Box 1: k-fold
Box 2: 3
K-Folds cross-validator provides train/test indices to split data in train/test sets. Split dataset into k consecutive folds (without shuffling by default).
The parameter n_splits ( int, default=3) is the number of folds. Must be at least 2.
Box 3: data
Example: Example:
>>>
>>> from sklearn.model_selection import KFold
>>> X = np.array([[1, 2], [3, 4], [1, 2], [3, 4]])
>>> y = np.array([1, 2, 3, 4])
>>> kf = KFold(n_splits=2)
>>> kf.get_n_splits(X)
2
>>> print(kf)
KFold(n_splits=2, random_state=None, shuffle=False)
>>> for train_index, test_index in kf.split(X):
... print("TRAIN:", train_index, "TEST:", test_index)
... X_train, X_test = X[train_index], X[test_index]
... y_train, y_test = y[train_index], y[test_index]
TRAIN: [2 3] TEST: [0 1]
TRAIN: [0 1] TEST: [2 3]
References:
https://scikit-learn.org/stable/modules/generated/sklearn.model_selection.KFold.html
NEW QUESTION: 2
Pega 7 comes with numerous API activities. In which situation would you explore available API activities?
A. When debugging an application
B. When designing your data model
C. When creating a new case type
D. When automating case processing
Answer: D
NEW QUESTION: 3
Which of the following is the best practice for error and exception handling?
A. Log and display detailed error and exception messages
B. Display detailed exception but log generic error message
C. Do not log or display error or exception messages
D. Log detailed exception but display generic error message
Answer: D
Explanation:
Section: Application, Data and Host Security
Explanation/Reference:
Explanation:
A detailed explanation of the error is not helpful for most end users but might provide information that is
useful to a hacker. It is therefore better to display a simple but helpful message to the end user and log the
detailed information to an access-restricted log file for the administrator and programmer who would need
as much information as possible about the problem in order to rectify it.
NEW QUESTION: 4
Once the cause of a problem has been identified, the next step is to:
A. Identify the problem.
B. Generate alternative solutions.
C. Select a solution.
D. Consider the reaction of competitors to various courses of action.
Answer: B