CIS 5450 - Midterm 1|| Questions and 100% Accurate Answers.

Which of the following is least likely to be a good example of big data (Purchase behavior for 1000 users, Hundreds of gene sequences, Points on the trajectory of a falling object, A thousand YouTube videos) correct answers Points on the trajectory of a falling object Which of the following tasks is not part of preprocessing data? (Model and annotate data, Extract the key parts of the data, Run machine learning algorithms on the data, Clean the data) correct answers Run machine learning algorithms on the data Features are: correct answers Values used to predict classes or groups What are the three basic encodings of structured data? correct answers tables, arrays, nested What kinds of data might need pattern-based extraction? correct answers web or text data Which of the following is not a part of the standard data structuring process? correct answers training When we read a structured file into a dataframe, what will occur? correct answers column names may be assigned based on the file header When we store a dataframe in a SQL database, what do we have an option of saving or dropping? correct answers the dataframe index What does projection do? correct answers returns a subset of the columns in a dataframe The document object model is what kind of data structure? correct answers tree XPath returns what as its result? correct answers set of matching nodes in order, as a list The XPath //span matches what? correct answers the span element(s) at any level An outerjoin will return the exact same results as an innerjoin if correct answers every tuple in the input relations has a match. If we join relations that each have an id column, what happens in Pandas? correct answers The input columns will be renamed in the output, to be unique, by appending suffixes to the names What does my_df['col1'] 3 return? correct answers A series of Boolean values, true only for rows where col1 is above 3