R Programming Coding MCQ Questions

Welcome to R Programming Coding MCQ Questions. Here, we present 20 MCQs (Multiple-Choice Questions) with code snippets to test your understanding of R programming coding and logical stills. Let's get started!

1. What will be the output of the following R program?

print(class(42L))

a) "numeric"

b) "integer"

c) "double"

d) "number"

2. What does this R code snippet output?

x <- 8
y <- 3
print(x %% y)

a) 2

b) 2.67

c) 3

d) None of the above

3. Consider the following R code. What will it print?

x <- 10
change <- function(x) {
    x <- 20
}
change(x)
print(x)

a) 10

b) 20

c) 0

d) NULL

4. What is the output of the following R function?

s1 <- "hello"
s2 <- "hello"
print(s1 == s2)

a) TRUE

b) FALSE

c) NULL

d) Error

5. What will this R program output?

print("5" + 2)

a) Error

b) "52"

c) "7"

d) "5 + 2"

6. Analyze the following R code snippet. What is its output?

print(class(10.5))

a) "numeric"

b) "double"

c) "integer"

d) "float"

7. Consider the following R code. What will it print?

i <- 0
print(i <- i + 1)

a) 0

b) 1

c) Error

d) NULL

8. What does this R code output?

x <- 5
print(if (x > 3) "Yes" else "No")

a) Yes

b) No

c) 1

d) 0

9. What will the following R code print?

numbers <- c(1, 2, 3)
print(length(numbers))

a) 3

b) 2

c) 1

d) NULL

10. What does the following R program output?

x <- 5
y <- 10
x <- y
print(x, y)

a) 5 10

b) 10 5

c) 10 10

d) NULL

11. Analyze the following R code snippet. What will it output?

s <- "hello"
print(substr(s, 2, 3))

a) he

b) el

c) llo

d) ell

12. What will the following R code output?

print(toupper("Hello"))

a) HELLO

b) hello

c) Hello

d) Error

13. Consider the following R code. What will it print?

result <- 10 / 4
print(result)

a) 2.5

b) 2

c) 2.0

d) None of the above

14. What is the output of the following R function?

print(gsub("b", "2", "abc"))

a) a2c

b) abc

c) ac

d) ab2c

15. What will this R program output?

flag <- 10 > 9 && 5 > 4
print(flag)

a) TRUE

b) FALSE

c) Error

d) NULL

16. What does the following R code snippet output?

array <- c(1, 2, 3)
array[2] <- 10
print(array)

a) c(1, 10, 3)

b) c(1, 2, 3)

c) Error

d) NULL

17. Consider the following R code. What will it print?

s <- "Hello"
t <- s
t <- paste(t, "World")
print(s)

a) Hello World

b) Hello

c) HelloHello

d) Error

18. What does the following R code output?

m <- c(a=1, b=2)
m['c'] <- 3
print(length(m))

a) 2

b) 3

c) Error

d) NULL

19. What will the following R code print?

x <- 1
for(i in 1:5) {
    x <- x * 2
}
print(x)

a) 2

b) 16

c) 32

d) 64

20. What does this code snippet output?

print(nchar("Hello"))

a) 5

b) Error

c) "Hello"

d) None of the above