R Language quiz questions

R Language interview questions

  • 1.

    _________ generate aesthetic mappings that describe how variables in the data are.

    1. aes_all

    2. aes_auto

    3. aes

    4. All of the mentioned

    Answer
  • 2.

    ________ is used to create a plot to illustrate patterns of missing values.

    1. ggmissplot

    2. ggmissing

    3. ggfluctuation

    Answer
  • 3.

    Which of the following creates fluctuation plot ?

    1. ggmissplot

    2. ggmissing

    3. ggfluctuation

    4. All of the mentioned

    Answer
  • 4.

    Which of the following is discrete state calculator ?

    1. discrete_scale

    2. ggpcp

    3. ggfluctuation

    4. All of the mentioned

    Answer
  • 5.

    __________ modifies geom/stat aesthetic defaults for future plots

    1. translate_qplot_base

    2. translate_qplot_gpl

    3. translate_qplot_defaults

    4. translate_qplot_ggplot

    Answer
  • 6.

    ________ is used for translating between qplot and base graphics.

    1. translate_qplot_base

    2. translate_qplot_gpl

    3. translate_qplot_lattice

    4. translate_qplot_ggplot

    Answer
  • 7.

    Point out the wrong statement :

    1. theme_minimal is minimalistic theme with no background annotations

    2. theme_color is classic-looking theme, with x and y axis lines and no gridlines

    3. theme_classic is a classic-looking theme

    4. None of the mentioned

    Answer
  • 8.

    Which of the following is a plot to investigate the order in which observations were recorded ?

    1. ggplot

    2. ggsave

    3. ggpcp

    4. ggorder

    Answer
  • 9.

    Which of the following cuts numeric vector into intervals of equal length ?

    1. cut_interval

    2. cut_time

    3. cut_number

    4. All of the mentioned

    Answer
  • 10.

    Point out the wrong statement :

    1. mean_se is used to calculate mean and standard errors on either side

    2. hmisc wraps up a selection of summary functions from Hmisc to make it easy to use

    3. plot is used to create a scatterplot matrix (experimental)

    4. All of the mentioned

    Answer
  • 11.

    _______ grammar makes a clear distinction between your data and what gets displayed on the screen or page.

    1. ggplot1

    2. ggplot2

    3. d3.js

    4. All of the mentioned

    Answer
  • 12.

    Which of the following code is not profiled ?

    1. C

    2. C++

    3. Java

    4. All of the mentioned

    Answer
  • 13.

    Which of the following statement gives sampling interval ?

    1. $sampling.interval

    2. $sampling.time

    3. $sampling.date

    4. None of the mentioned

    Answer
  • 14.

    The final bit of output that summaryRprof() provides is the ______ interval and the total runtime.

    1. response

    2. sampling

    3. processing

    4. All of the mentioned

    Answer
  • 15.

    _________ time is time charged to the CPU(s) for the R expression.

    1. elapsed

    2. user

    3. response

    4. All of the mentioned

    Answer
  • 16.

    Which of the following function actually fits the linear model ?

    1. lm.time()

    2. lm.date()

    3. lm.fit()

    4. All of the mentioned

    Answer
  • 17.

    Point out the correct statement :

    1. “by.total” first subtracts out time spent in functions above the current function in the call stack

    2. The summaryRprof() function calculates how much time is spend in which function

    3. By default, the profiler samples the function call stack every 0.02 seconds

    4. None of the mentioned

    Answer
  • 18.

    _______ divides the time spend in each function by the total run time

    1. “by.sum”

    2. “by.total”

    3. “by.self”

    4. All of the mentioned

    Answer
  • 19.

    How many methods exist for normalizing the data ?

    1. one

    2. two

    3. three

    4. profiler

    Answer
  • 20.

    Point out the correct statement :

    1. Rprof() is used to turn off the profiler

    2. At each line of the output, the profiler writes out the function call stack

    3. The summaryprof() function tabulates the R profiler output

    4. All of the mentioned

    Answer

© 2017 QuizBucket.org