ISYE 6501 MIDTERM FREQUENTLY TESTED ACTUAL
EXAM QUESTIONS WITH CORRECT ANSWERS
Question 1.
What does SVM stand for?
ANSWER
Support Vector Machine
Question 2.
Is written text structured or unstructured?
ANSWER
Unstructured
Question 3.
When we increase the sum of the square of the coefficients we...
ANSWER
Decrease the distance between the lines
Question 4.
In SVM soft classifier we tradeoff between maximizing ___ and minimizing ___
ANSWER
margin and errors
Question 5.
If lambda gets small what gets emphasized, large margin or minimizing training error?,
ANSWER
Minimizing errors.
,Question 6.
What is a support vector?
ANSWER
A point that holds up a shape.
Question 7.
Does ...[⅔(a-1)+1/3(a+1)] move an SVM classifier up or down?
ANSWER
Up
Question 8.
How do you make errors more costly in a soft SVM classifier?
ANSWER
include a multiplier for the point-error term.
Question 9.
If an SVM coefficient is very close to zero...
ANSWER
that term is not very important to the classification.
Question 10.
What is the difference between standardization and scaling?
ANSWER
Scaling is bounded in range. Standardization is scaling to
a normal distribution. Standardization is the (value - factor mean) / (factor standard deviation)
Question 11.
What is the 2-norm?
ANSWER
Euclidean distance
,Question 12.
What is the 1-norm?
ANSWER
The rectilinear (Manhattan) distance
Question 13.
What is the infinity norm?
ANSWER
The value of the largest dimension
Question 14.
Measuring the quality of a model is called?
ANSWER
Validation
Question 15.
What does a confusion matrix show?
ANSWER
The performance of a classification model.
Question 16.
A time series outlier that seems "off the curve" is called a...
ANSWER
contextual outlier.
Question 17.
A data element that is different from all other data in a set is called a...
ANSWER
point outlier.
, Question 18.
When something is missing in a range of points
ANSWER
it is called a..., collective outlier.
Question 19.
The whiskers on a box plot extend to...
ANSWER
the 10th and 90th percentiles (or 5th and 95th)
Question 20.
Why are hypothesis tests generally not sufficient for change detection?
ANSWER
They are slow to detect changes.
Question 21.
In CUSUM, T is _____ and C is _____.,
ANSWER
Threshold and a "bring down factor"
Question 22.
In a CUSUM model, you adjust T and C to manage the tradeoff between...,
ANSWER
early detection and false-alarms
Question 23.
In exponential smoothing, if the data is less random, then you want to pick an alpha that is...,
ANSWER
Close to 1.
EXAM QUESTIONS WITH CORRECT ANSWERS
Question 1.
What does SVM stand for?
ANSWER
Support Vector Machine
Question 2.
Is written text structured or unstructured?
ANSWER
Unstructured
Question 3.
When we increase the sum of the square of the coefficients we...
ANSWER
Decrease the distance between the lines
Question 4.
In SVM soft classifier we tradeoff between maximizing ___ and minimizing ___
ANSWER
margin and errors
Question 5.
If lambda gets small what gets emphasized, large margin or minimizing training error?,
ANSWER
Minimizing errors.
,Question 6.
What is a support vector?
ANSWER
A point that holds up a shape.
Question 7.
Does ...[⅔(a-1)+1/3(a+1)] move an SVM classifier up or down?
ANSWER
Up
Question 8.
How do you make errors more costly in a soft SVM classifier?
ANSWER
include a multiplier for the point-error term.
Question 9.
If an SVM coefficient is very close to zero...
ANSWER
that term is not very important to the classification.
Question 10.
What is the difference between standardization and scaling?
ANSWER
Scaling is bounded in range. Standardization is scaling to
a normal distribution. Standardization is the (value - factor mean) / (factor standard deviation)
Question 11.
What is the 2-norm?
ANSWER
Euclidean distance
,Question 12.
What is the 1-norm?
ANSWER
The rectilinear (Manhattan) distance
Question 13.
What is the infinity norm?
ANSWER
The value of the largest dimension
Question 14.
Measuring the quality of a model is called?
ANSWER
Validation
Question 15.
What does a confusion matrix show?
ANSWER
The performance of a classification model.
Question 16.
A time series outlier that seems "off the curve" is called a...
ANSWER
contextual outlier.
Question 17.
A data element that is different from all other data in a set is called a...
ANSWER
point outlier.
, Question 18.
When something is missing in a range of points
ANSWER
it is called a..., collective outlier.
Question 19.
The whiskers on a box plot extend to...
ANSWER
the 10th and 90th percentiles (or 5th and 95th)
Question 20.
Why are hypothesis tests generally not sufficient for change detection?
ANSWER
They are slow to detect changes.
Question 21.
In CUSUM, T is _____ and C is _____.,
ANSWER
Threshold and a "bring down factor"
Question 22.
In a CUSUM model, you adjust T and C to manage the tradeoff between...,
ANSWER
early detection and false-alarms
Question 23.
In exponential smoothing, if the data is less random, then you want to pick an alpha that is...,
ANSWER
Close to 1.
