Suppose there are an equal number of positive and negative records in the data and the decision tree classifier predicts every test record to be positive. What is the expected error rate of the classifier on the test data?
Consider the task of building a classifier from random data, where the at-
tribute values are generated randomly irrespective of the class labels. Assume
the data set contains records from two classes, “+” and “?.” Half of the data
set is used for training while the remaining half is used for testing.
50%.
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Which of the following statements about pointer initialization and values is false?
a. Prior C++11, the value specified for a null pointer was 0 or NULL. b. When 0 is assigned to a pointer, it’s converted to a pointer of the appropriate type. c. The value 0 is the only integer value that can be assigned directly to a pointer variable without first casting the integer to a pointer type. d. In the new standard, you should use the constant null_ptr to initialize a pointer instead of 0 or NULL.
The ____ Tool is primarily used to intensify detail in an area of an image where you would like the viewer’s eye to focus.
a. Sharpen b. Luminosity c. Focus d. Target
A technician is plugging in an external HDD. Which of the following connections should the technician use to ensure the HIGHEST transfer rate?
A. USB 1.1 B. USB 2.0 C. IEEE 1394b D. eSATA
You can use Collections method ________ to randomize the order of the elements in an ArrayList
a. reorder b. shuffle c. srand d. randomize