Related InterviewSolutions

• If I want to save a plot to a PDF file, which of the following is a correct way of doing that?(a) Construct the plot on the screen device and then copy it to a PDF file with dev.copy2pdf()(b) Construct the plot on the PNG device with png(), then copy it to a PDF with dev.copy2pdf()(c) Open the PostScript device with postscript(), construct the plot, then close the device with dev.off()(d) Open the screen device with quartz(), construct the plot, and then close the device with dev.off()I have been asked this question in a job interview.Question is from Exploratory Data Analysis topic in division Profiling, Simulation and Data Analysis of R Programming
• ____________ produces one-dimensional scatterplots.(a) xyplot(b) stripplot(c) barchart(d) bwplotThis question was addressed to me in semester exam.This intriguing question originated from Exploratory Data Analysis topic in chapter Profiling, Simulation and Data Analysis of R Programming
• Which of the following is a principle of analytic graphics?(a) Don’t plot more than two variables at at time(b) Make judicious use of color in your scatterplots(c) Show box plots (univariate summaries)(d) Show causality, mechanism, explanationI had been asked this question in a national level competition.My question comes from Exploratory Data Analysis topic in portion Profiling, Simulation and Data Analysis of R Programming
• Which of the following function works similar to separate()?(a) extract()(b) gather()(c) sep()(d) separate()I had been asked this question by my college director while I was bunking the class.Question is taken from Data Wrangling topic in section Profiling, Simulation and Data Analysis of R Programming
• _________ describe the type of plot you will produce.(a) geoms(b) ggplot(c) fplot(d) gplotThis question was posed to me during an interview.Origin of the question is ggplot2 topic in division Profiling, Simulation and Data Analysis of R Programming
• _________ extract a subset of rows from a data frame based on logical conditions.(a) rename(b) filter(c) set(d) subsetThis question was addressed to me in exam.Question is taken from Data Wrangling in division Profiling, Simulation and Data Analysis of R Programming
• Which of the following d takes two columns and spreads them into multiple columns?(a) ggmissplot(b) printplot(c) print.ggplot(d) ggplotI have been asked this question in final exam.My doubt stems from Data Wrangling in section Profiling, Simulation and Data Analysis of R Programming
• Point out the correct statement?(a) gather() makes “long” data wider(b) tidyr is a reframing of reshape designed to accompany the tidy data framework(c) there are two fundamental verbs of data tidying(d) tidyr and dplyr packages do not make use of the pipe operatorI got this question by my school principal while I was bunking the class.Question is taken from Data Wrangling topic in section Profiling, Simulation and Data Analysis of R Programming
• __________ is interval represented by a vertical line, with a point in the middle.(a) geom_range(b) geom_pointrange(c) printplot(d) geom_contourI had been asked this question in an international level competition.My question is taken from ggplot2 topic in portion Profiling, Simulation and Data Analysis of R Programming
• Logical flag is applicable to which of the following plots?(a) scatterplot(b) dotplot(c) xyplot(d) zyplotThe question was asked during an online exam.I need to ask this question from Exploratory Data Analysis topic in chapter Profiling, Simulation and Data Analysis of R Programming