This set of R Programming Language Multiple Choice Questions & Answers (MCQs) focuses on “Exploratory Data Analysis – 1”. 1. 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) … Read more
This set of Basic R Programming Interview questions and answers focuses on “Data Wrangling – 2”. 1. __________ is used when you have variables that form rows instead of columns. a) tidy() b) spread() c) separate() d) gather() 2. Point out the correct statement? a) tidyr and dplyr packages do not make use of the … Read more
This set of R Programming Language Multiple Choice Questions & Answers (MCQs) focuses on “Data Wrangling – 1”. 1. _________ is new package that makes it easy to “tidy” your data. a) tidy b) tidyr c) tidyneat d) tidynr 2. Point out the correct statement? a) Each row is an observation in tidy data b) … Read more
This set of R Programming Problems focuses on “ggplot2 – 3”. 1. _________ display contours of a 3d surface in 2d. a) aes_contour b) geom_contour c) aes_gem d) aes_auto 2. Point out the correct statement? a) autoplotgraph is used to complete ggplot appropriate to a particular data type b) auto_element wraps up a projection of … Read more
This set of R Programming Aptitude Test focuses on “ggplot2 – 2”. 1. _________ generate aesthetic mappings that describe how variables in the data. a) aes_all b) aes_auto c) aes d) aes_string 2. Point out the correct statement? a) update_element update contents of a theme b) Use theme_update_element to modify a small number of elements … Read more
This set of R Programming Language Multiple Choice Questions & Answers (MCQs) focuses on “ggplot2 – 1”. 1. _______ grammar makes a clear distinction between your data and what gets displayed on the screen or page. a) ggplot1 b) ggplot2 c) d3.js d) ggplot3 2. Point out the wrong statement? a) mean_se is used to … Read more
This set of R Programming Questions for campus interviews focuses on “R Profiler – 2”. 1. The profiler can be turned off by passing _________ to Rprof(). a) 0 b) 1 c) 2 d) NULL 2. Point out the correct statement? a) Rprof() is used to turn off the profiler b) At each line of … Read more
This set of R Programming Language Multiple Choice Questions & Answers (MCQs) focuses on “R Profiler – 1”. 1. ________ is a systematic way to examine how much time is spent in different parts of a program. a) Profiling b) Monitoring c) Logging d) Debugging 2. Point out the correct statement? a) The Rprofiler() function … Read more
This set of R Programming Questions for entrance exams focuses on “Simulation – 2”. 1. _________ ensures reproducibility of the sequence of random numbers. a) sets.seed() b) set.seed() c) set.seedvalue() d) set.value() 2. Point out the correct statement? a) When simulating any random numbers it is not essential to set the random number seed b) … Read more
This set of R Programming Language Multiple Choice Questions & Answers (MCQs) focuses on “Simulation – 1”. 1. ________ generate random Normal variates with a given mean and standard deviation. a) dnorm b) rnorm c) pnorm d) rpois 2. Point out the correct statement? a) R comes with a set of pseudo-random number generators b) … Read more
