Essential R Programming Practice Questions for Beginners

R is a powerful programming language used for statistical computing and data visualization. Whether you're a beginner or looking to refine your skills, practicing with R programming practice questions is essential. These questions help you understand key concepts like data manipulation, plotting, and working with datasets.

For example, a beginner-level R programming practice question might involve creating a vector or plotting a basic graph. As you progress, you can explore more advanced questions that require analyzing real-world datasets or writing custom functions.

Practicing regularly with R programming practice questions ensures that you not only learn the syntax but also gain hands-on experience solving problems effectively.

Basic Operations R Programming Practice Questions for Beginners

1. Write an R script to calculate the sum, difference, product, and quotient of two numbers.

2. Create a sequence of numbers from 1 to 20 and print it.

3. Generate 10 random numbers between 1 and 100.

Vectors and Lists R Programming Practice Questions for Beginners

1. Create a vector containing the numbers 10, 20, 30, 40, and 50. Find the mean, median, and sum of this vector.

2. Combine two vectors: c(1, 2, 3) and c(4, 5, 6) into one.

3. Create a list with elements of different types (e.g., numeric, character, and logical).

Matrices R Programming Practice Questions for Beginners

1. Create a 3x3 matrix with numbers 1 to 9. Print its transpose.

2. Add two 2x2 matrices.

3. Multiply a matrix by a scalar.

Data Frames R Programming Practice Questions for Beginners

1. Create a data frame with columns: Name, Age, and Score. Add 5 rows of data.

2. Filter the rows of the data frame where the Score is greater than 50.

3. Add a new column to the data frame, calculating if the Score is “Pass” (above 40) or “Fail.”

Control Structures R Programming Practice Questions for Beginners

1. Write a program to check if a number is even or odd.

2. Use a for loop to print numbers from 1 to 10.

3. Write a program to find the factorial of a number using a while loop.

Functions R Programming Practice Questions for Beginners

1. Create a function to calculate the area of a rectangle.

2. Write a function to find the square of a number.

3. Create a function that takes a vector as input and returns the largest element.

Plotting R Programming Practice Questions for Beginners

1. Plot a simple line graph of the numbers 1 to 10 against their squares.

2. Create a bar plot for the following data:

Categories: A, B, C, D
Values: 5, 10, 15, 20

Statistical Operations R Programming Practice Questions for Beginners

1. Calculate the mean, variance, and standard deviation of a given numeric vector.

2. Write R code to simulate rolling a die 100 times and calculate the frequency of each outcome.

3. Perform a t-test on two sets of data:

Set1: 2, 4, 6, 8, 10
Set2: 1, 3, 5, 7, 9

File Handling R Programming Practice Questions for Beginners

1. Read a CSV file into R and print the first 5 rows.

2. Write a data frame to a CSV file.

3. Count the number of rows and columns in a dataset loaded from a file.