Data Collection And Preprocessing — Part 2 MCQs with Explanations

Data Imputation is the correct answer to “In data preprocessing, what is the term for the process of handling missing data by filling in the missing values with estimates”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

All of the mentioned is the correct answer to “Which of the following request can be issued from httr package”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

httr is the correct answer to “Which of the following package is used for reading HTML and XML data”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

read.table is the correct answer to “Which of the following function is used for loading flat files”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

tidyr is the correct answer to “Which of the following package is used for tidy data”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

grepl is the correct answer to “Which of the following function is used for searching text strings by means of regular expression”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

read.Lines is the correct answer to “Which of the following function is used to read data off the webpages”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

tolower is the correct answer to “Which of the following function is used for fixing character vectors”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

XmlSApply is the correct answer to “Which of the following function programmatically extract parts of XML file”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

* is the correct answer to “Which of the following signs are used to indicate repetition”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

RMySQL vignette is the correct answer to “Which of the following package is used to connect MySQL RDBMS with R”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

strsplit is the correct answer to “Which of the following function is good for the automatic splitting of names”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

Source is the correct answer to “Which type of data is generated by POS terminal in a busy supermarket each day”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

False is the correct answer to “Each observation forms a column in tidy data.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

Webscraping is the correct answer to “Which of the following is used to extract data from HTML code of websites”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

Raw data is the correct answer to “Which of the following block information is odd man out”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

False is the correct answer to “httr package does not work well with facebook and twitter API.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

Processed is the correct answer to “Which of the following data is put into a formula to produce commonly accepted results”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

False is the correct answer to “mutate function is used for casting as multi dimensional arrays.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

[] is the correct answer to “Which of the following is used for specifying character class with metacharacter”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

True is the correct answer to “Regular expressions can be thought of as a combination of literals and metacharacters.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

all of the mentioned is the correct answer to “Which of the following is an example of tidy data”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

na.strings is the correct answer to “Which of the following will set the character that represents missing value”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

tables is the correct answer to “Which of the following can be used to view all the tables in memory”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

All of the mentioned is the correct answer to “Which of the following is the most common problem with messy data”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

True is the correct answer to “Following figure represents correct sequence of steps in performing data analysis.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

reshape2 is the correct answer to “tidyr is a reframing of . . . . . . . . designed to accompany the tidy data framework.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

False is the correct answer to “Strange binary file generated from machines is an example of tidy data.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

read.spss(SPSS) is the correct answer to “Which of the following package loads data from SPSS”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

False is the correct answer to “Processing data includes subsetting, formatting and merging only.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

head is the correct answer to “Which of the following function gives information about top level data”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

all of the mentioned is the correct answer to “Which of the following is an important parameter of read.table function”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

summarized is the correct answer to “Data that summarize all observations in a category are called . . . . . . . . data.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

all of the mentioned is the correct answer to “Which of the following is an example of raw data”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

all of the mentioned is the correct answer to “Which of the following package is used for reading GIS data”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

xlsx is the correct answer to “Which of the following package is used for reading excel data”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

True is the correct answer to “Raw data in the real-world is tidy and properly formatted.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

dcast is the correct answer to “Which of the following function is used for casting data frames”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

True is the correct answer to “Extracting XML is the basis for most web scraping.”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.

left is the correct answer to “Which of the following join is by default used in plyr package”. This question is standard in competitive examination syllabi for Data Collection And Preprocessing.