**Top R Programming Interview Questions and answers:** Here, we highlight some common questions you might be asked during a job interview for Programming related positions.

**Introduction to R programming:**

R is a programming language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R. R was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, and is currently developed by the R Development Core Team.

R Programming provides a wide variety of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering,) and graphical techniques, and is highly extensible. The S language is often the vehicle of choice for research in statistical methodology, and R provides an Open Source route to participation in that activity. Polls, surveys of data miners, and studies of scholarly literature databases show that R’s popularity has increased substantially in recent years.

One of R’s strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has been taken over the defaults for the minor design choices in graphics, but the user retains full control.

R Programming is available as Free Software under the terms of the Free Software Foundation’s GNU General Public License in source code form. It compiles and runs on a wide variety of UNIX platforms and similar systems including FreeBSD and Linux, Windows and MacOS.

### What is R Programming?

### What are the different data objects in R?

### Explain the data import in R language.

### What makes a valid variable name in R?

### What is the main difference between an Array and a matrix?

### How many types of data types are provided by R?

### What is GUI in R?

### What is CLI in R?

### What is the use of with () and by () function in R?

### How can you load and use csv file in R?

### What is Visualization in R?

### What are R topical programming and statistical relevance?

### How do you get the name of the current working directory in R?

### What are statistical and programming features of R?

### What is the use of subset() and sample() function in R?

### What are the advantages of R?

### What are the disadvantages of R Programming?

### What is R Base package?

### What is the workspace in R?

### How R is used in logistic regression?

### What are different ways to call a function in R?

### How many sorting algorithms are available?

### What is lazy function evaluation in R?

### What is R lists?

### How do you install a package in R?

### Which command is used for storing R object into a file?

### Which command is used for restoring R object from a file?

### What is the use of abline() function?

### What is reshaping of data in R?

### How to get a list of all the packages installed in R?

### What is Predictive Analysis in R?

### What is Predictive analysis process in R?

### What is Descriptive analysis in R?

### What are Descriptive analysis methods in R?

### What are R Functions?

### What are features of R functions?

### What are the components of R functions?

### What are R matrices and R matrices functions?

### What is control structure in R?

### Name all control statements present in R?

### What is Recursive Function in R?

### What are applications of Recursion?

### What is TCP/IP in R?

### What does TCP/IP work?

### Explain TCP/IP applications, services and protocols?