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Logical Expressions Interview Questions and Answers
Table of Content
 Logistic regression method is ______.
 Mathematical understanding of the _____and the natural logarithm function is used to understand what logistic regression is and how it works.
 The sigmoid function has values very close to either _______across most of its domain.
 The sigmoid function has values very close to either 0 or 1. This fact makes it suitable for application in ______ methods.
 In Python, _______ represent the natural logarithm of x which is used while applying logistic regression.
 Logistic regression is a linear classifier, so you’ll use a linear function (x) = b_{0} + b_{1}x_{1} + ... + b_{r}x_{r}, also called the _____.
 In Logistic regression is a linear classifier, so you’ll use a linear function (x) = b_{0} + b_{1}x_{1} + āÆ + b_{r}x_{r}, where the variables b_{0}, b_{1}, …, b_{r} are called as _______
 The logistic regression function (x) is the sigmoid function of f(x):p(x) =______.
 In Logistic regression ,the function p(x) is often interpreted as the predicted probability that the output for a given x is equal to 1. Therefore, 1 − (x) is the probability that the output is ______.
 Logistic regression determines the best predicted weights b_{0}, b_{1}, ...., b_{r} such that the function p(x) is as close as possible to all actual responses y_{i},i = 1, …, n, where n is the number of observations. The process of calculating the best weights using available observations is called _______.
 In Logistic regression to get the best weights, we usually maximize the loglikelihood function (LLF) for all observations i= 1, …, n. This method is called the ______ .
 The method maximum likelihood estimation is represented by the equation LLF = ______ .
 Binary classification has possible types of results, one of which is True negatives which means _______ .
 Binary classification has possible types of results, one of which is True positives which means _____ .
 Binary classification has possible types of result, one of which is False negatives which means _____ .
 Binary classification has possible types of result, one of which is False positives which means ______ .

Logistic regression method is _________________.
 a) Any type of output variable.
 b) Only for binary classification output.
 c) More than two outcomes.
 d) None of the above.
Answer  b) Only for binary classification output

Mathematical understanding of the _________________and the natural logarithm function is used to understand what logistic regression is and how it works.
 a) Sigmoid function.
 b) Linear function.
 c) Tanh function.
 d) Relu function.
Answer  a) Sigmoid function

The sigmoid function has values very close to either ____________across most of its domain.
 a) Infinity.
 b) Negative values.
 c) 0 or 1.
 d) Always 0.
Answer  c) 0 or 1

The sigmoid function has values very close to either 0 or 1. This fact makes it suitable for application in ______________ methods.
 a) Classification.
 b) Continuous values prediction.
 c) Both (a) and (b).
 d) None of the above.
Answer  a) Classification

In Python, _____________ represent the natural logarithm of x which is used while applying logistic regression.
 a) Only math.log(x).
 b) Only numpy.log(x).
 c) Math.log(x) and numpy.log(x) both.
 d) None of the above.
Answer  c) Math.log(x) and numpy.log(x) both

Logistic regression is a linear classifier, so you’ll use a linear function (x) = b_{0} + b_{1}x_{1} + āÆ + b_{r}x_{r}, also called the _____________.
 a) Logit.
 b) Login.
 c) Log.
 d) None of the above.
Answer  a) Logit

In Logistic regression is a linear classifier, so you’ll use a linear function (x) = b_{0} + b_{1}x_{1} + āÆ + b_{r}x_{r}, where the variables b_{0}, b_{1}, …, b_{r} are called as _____________
 a) Estimators.
 b) Predicted weights.
 c) Coefficients.
 d) All of the above.
Answer  d) All of the above

The logistic regression function (x) is the sigmoid function of f(x):p(x) =___________________.
 a) 1 / (1 + exp(f(x)).
 b) (1 + exp(f(x)).
 c) (1  exp(f(x)).
 d) None of the Above.
Answer  a) 1 / (1 + exp((f(x))

In Logistic regression ,the function p(x) is often interpreted as the predicted probability that the output for a given x is equal to 1. Therefore, 1(x) is the probability that the output is __________.
 a) 1.
 b) Infinity.
 c) 0.
 d) None of the above.
Answer  c) 0

Logistic regression determines the best predicted weights b_{0}, b_{1}, …, b_{r} such that the function p(x) is as close as possible to all actual responses y_{i}, i = 1, …, n, where n is the number of observations. The process of calculating the best weights using available observations is called ___________________.
 a) Data Preprocessing.
 b) Model Validating.
 c) Model training or fitting.
 D) All of the above.
Answer  c) Model training or fitting

In Logistic regression to get the best weights, we usually maximize the loglikelihood function (LLF) for all observations i = 1, …, n. This method is called the ___________________ .
 a) Minimum likelihood estimation.
 b) Maximum likelihood estimation.
 c) True likelihood estimation.
 d) None of the above.
Answer  b) Maximum likelihood estimation

The method maximum likelihood estimation is represented by the equation LLF = _________________ .
 a) Σ_{i}(y_{i} log(p(x_{i})) + (1  y_{i}) log(1 p(x_{i}))).
 b) (y_{i} log(p(x_{i})) + (1  y_{i}) log(1 p(x_{i}))).
 c) Σ_{i}(y_{i} log(p(x_{i})) + (1  y_{i}) log(1 p(x_{i}))).
 d) None of the above.
Answer  a) Σ_{i}(y_{i} log(p(x_{i})) + (1  y_{i}) log(1 p(x_{i})))

Binary classification has possible types of results, one of which is True negatives which means_________________ .
 a) Correctly predicted negatives (zeros).
 b) Correctly predicted positives (ones).
 c) Incorrectly predicted negatives (zeros).
 d) Incorrectly predicted positives (ones).
Answer  a) Correctly predicted negatives (zeros)

Binary classification has possible types of results, one of which is True positives which means _________________ .
 a) Correctly predicted negatives (zeros).
 b) Correctly predicted positives (ones).
 c) Incorrectly predicted negatives (zeros).
 d) Incorrectly predicted positives (ones).
Answer  b) correctly predicted positives (ones)

Binary classification has possible types of result, one of which is False negatives which means _________________ .
 a) Correctly predicted negatives (zeros).
 b) Correctly predicted positives (ones).
 c) Incorrectly predicted negatives (zeros).
 d) Incorrectly predicted positives (ones).
Answer  c) Incorrectly predicted negatives (zeros)

Binary classification has possible types of result, one of which is False positives which means _________________ .
 a) Correctly predicted negatives (zeros).
 b) Correctly predicted positives (ones).
 c) Incorrectly predicted negatives (zeros).
 d) Incorrectly predicted positives (ones).
Answer  d) Incorrectly predicted positives (ones)
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