BSCS 4-1 - Elective 3 (R Programming) Quiz - 2-17-2023

How many types of R objects are present in R data types?

• 4

• 5

• 6

• 7

Considered as heterogeneous data structure where it contains elements in different data types.

• Vector

• List

• Data Frames

• Matrices

This refers to a method when you call a function with an argument of the wrong type. If that happens, R will look for a suitable method in order for the function to work.

• Coercion Method

• Argument Error Method

• Parameter Debugger Method

• Observations and Time Method

Which of the following codes we use to extract first two rows from data frame.

• data(c[1,2], )

• data(c[1,2] )

• data[c(1,2)]

• data[c(1,2), ]

A generic function in R that we used to get the rows and columns from the data frame.

• dplyr

• vector

• subset

• colnames

A function which serves as another way to run our script.

• run( )

• source( )

• Ctrl + Enter

• view( )

If a command is not complete at the end of a line, R will give a different prompt, by default it is:

• -

• +

• >

• *

Which of the following is not valid?

• x <- y <- T

• x = y = T

• x <- y = T

• x = y <- T

Which data structure is used to store categorical variables?

• Data Frame

• Categorical

• Integer

• Factor

What is the function used for scatterplot for all the pairs of a dataset?

• Plot( )

• Cor( )

• ScartterPlot( )

• Scatter( )