R Programming Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

R Programming Interview Questions

Questions Answers Views Company eMail

In r how missing values are represented?

Mention how you can produce co-relations and covariances?

What are r data types?

112

What is inheritance in s3 class?

103

What is apply() function in r?

Explain how to repeat vectors in r?

What packages are used for data mining in r?

What does tcp/ip work?

What is s3 in r?

What is s4?

Name all control statements present in r?

What is function definition?

What is the use of lattice package?

103

Explain the concept of principal component analysis?

What are r matrices and r matrices functions?

Un-Answered Questions { R Programming }

What is the use of sink(), Library () and search() function?

Give the syntax for creating scatterplot matrices?

111

What is the rattle package in r?

103

What is the difference between the data frame and a matrix in R?

Write a custom function which will replace all the missing values in a vector with the mean of values.

What makes a valid variable name in R?

123

Explain r graphics devices?

How to call c function from r?

117

What are the applications of R?

How to construct new s4 class?

Explain how you can start the r commander gui?

What is reference class?

What is using all() and any()?

112

How can you verify if a given object “X” is a matrix data object?

113

What are Ensemble Models in R?

119

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