不属于大数据的4V特征是（）

单项选择题下列不属于数据清洗的数据处理方法是（）

A.缺失值处理
B.噪声数据清除
C.数据一致性检查
D.重复数据记录处理

单项选择题Which following one is false？（）

A.The attribute values and classlabels may suffer from stochasticnoise，systematic noise，and random artefacts.
B.The quality of the induced classifier depends ontraining examples.
C.Apart from low error rate，some applications require that the classifer provides the reasons behind the classification.
D.The simplest performance criterion is rmse.

单项选择题The error rate is usually higher on the testing set than on the training set. Is it true？（）

A.Yes
B.No

单项选择题Which of these is a reasonable definition of machine learning？（）

A.Machine learning is the field of study that gives computers the ability to learn without being explicitly programmed.
B.Machine learning is the field of allowing robots to acti ntelligently.
C.Machine learning is the science of programming computers.
D.Machine learning learns from labeleddata.

单项选择题Suppose you are working on stock market prediction. You would like to predict whether or not a certain company will win a patent infringement lawsuit (by training on data of companies that had to defend against similar lawsuits). Would you treat this as a classification or a regression problem？（）

A.Classification
B.Regression