# Machine Learning: MCQs Set – 01

#### Q1: Computers excel at learning.

• (A) facts
• (B) concepts
• (C) procedures
• (D) principles

#### Q2: The average positive difference in values between computed and intended outcomes is known as _____

• (A) root mean squared error
• (B) mean squared error
• (C) mean absolute error
• (D) mean positive error

Explanation:

#### Q3: Increase in which of the following hyper parameter results into overfit in Random forest? (1). Number of Trees. (2). Depth of Tree, (3). Learning Rate

• (A) Only 1
• (B) Only 2
• (C) 2 and 3
• (D) 1,2 and 3

#### Q4: Below are the 8 actual values of target variable in the train file: [0,0,0, 0, 1, 1,1,1,1,1], What is the entropy of the target variable?

• (A) -(6/10 log(6/10) + 4/10 log(4/10))
• (B) 6/10 log(6/10) + 4/10 log(4/10)
• (C) 4/10 log(6/10) + 6/10 log(4/10)
• (D) 6/10 log(4/10) – 4/10 log(6/10)

• (A) Only 1
• (B) Only 2
• (C) Only 3
• (D) 1 and 3

#### Q6: In a neural network, which of the following techniques is used to deal with overfitting?

• (A) Dropout
• (B) Regularization
• (C) Batch Normalization
• (D) All of these

#### Q7: Lasso can be interpreted as least-squares linear regression where

• (A) weights are regularized with the l1 norm
• (B) weights are regularized with the l2 norm
• (C) the solution algorithm is simpler

• (A) TRUE
• (B) FALSE

#### Q9: What would be the Type I error?

• (A) Concluding that listening to music while studying improves memory, and it’s right.
• (B) Concluding that listening to music while studying improves memory when it actually doesn’t.
• (C) Concluding that listening to music while studying does not improve memory but it does.

Explanation:

Type I error occurs then the Negative sample is classified as positive. Type I error is also known as False Positive (FP). In the courts, a type I error is equivalent to convicting an innocent defendant.

Type I error occurs then the Positive sample is classified as Negative. Type II error is also known as False Negative (FN). In the courtroom scenario, a type II error would be acquitting a criminal.

• (A) 23.7%
• (B) 37.2%
• (C) 22.5%
• (D) 27.3%