R Programming

The R language is widely used among statisticians and data miners for developing statistical software and data analysis. There are various reasons why data scientist use r programming language, but here we will discuss the top question and answers which can be asked in the data science related interviews.

Q.1 What is R Programming?
R is a programming language used for statistical computing and graphics. It is widely used among Data scientist, statisticians and data miners for data analysis.
Q.2 What is the use of help() command
To Obtain documentation for a given R command
Q.3 What is the use of read.csv(), read.table() command
To Load into a data.frame an existing data file
Q.4 What is the use of library(), require() command
To Make available an R add-on package
Q.5 What is the use of dim() command
To See dimensions (# of rows/cols) of data.frame
Q.6 What is the use of mean(), median() command
To Identify “center” of distribution
Q.7 What is the use of anova() command
To analysis of variance (can use on results of lm())
Q.8 What is the use of binom.test() command
To hypothesis test and confidence interval for 1 proportion
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