7-Day R Programming Interview Preparation Plan
Your saved questions plus a day-by-day plan. Add questions with Save to → 7-Day Job Prep on any question page.
Day-by-day plan
Day 1R fundamentals
- Revise data types, coercion, NA, NULL and NaN
- Practise subsetting vectors, lists and data frames
- Explain vectorization, recycling and factors aloud
- Solve 10 basic R output questions
Day 2Data wrangling
- Write dplyr pipelines with group_by, summarise and mutate
- Practise all join types including anti_join
- Reshape data with pivot_longer and pivot_wider
- Write one function using {{ }} tidy evaluation
Day 3Visualization
- Build bar, line, histogram and boxplot charts in ggplot2
- Add facets, themes and labels to one chart
- Fix bar ordering with fct_reorder
- Prepare to explain chart choices for three scenarios
Day 4Statistics
- Revise p-values, confidence intervals and error types
- Run t.test, chisq.test and aov on sample data
- Calculate A/B test sample size with power.prop.test
- Explain Simpson's paradox and multiple testing
Day 5Modelling
- Fit and interpret lm and glm models
- Build a tidymodels workflow with a recipe and cross-validation
- Revise confusion matrix metrics and ROC AUC
- Prepare answers on overfitting, leakage and imbalance
Day 6Production and projects
- Build a small Shiny app with one reactive
- Revise renv, testthat, Git and DBI basics
- Write a 2-minute walkthrough of your best R project
- Review error handling with tryCatch and purrr::safely
Day 7Mock interview and HR
- Take a timed mock interview covering all topics
- Prepare five STAR stories on automation, data issues and teamwork
- Revise the 30 key revision points
- Rest and review weak areas briefly
Frequently asked questions
Can I prepare for a R Programming interview in 7 days?
Seven days is enough to revise and sharpen, not to learn from zero. Use the plan to cover each core topic once, practise questions daily and finish with a mock interview.
How do I add questions to the plan?
On any question page choose Save to → 7-Day Job Prep. Saved questions show up at the top of this page.
How many hours a day should I study?
Two to four focused hours a day works for most people: one hour of revision, one to two hours of questions, and the rest on projects or mock answers.
Questions to practise each day
Company-wise R Programming questionsExperience-wise R Programming questionsRole-wise R Programming questionsCity-wise R Programming questionsMost asked R Programming questionsScenario-based questionsPractical / hands-on questionsHR & behavioural questionsR Programming mock interviewOnline assessment questionsTechnical round questionsManagerial round questionsR Programming topic sheets