Interview question based on skill :
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. Which of the following can be considered as object attribute ?
Correct Answer is : touch()
2. What would be the result of following code ? > x <- vector("numeric", length = 10) > x
Correct Answer is : system()
3. The ___ function can be used to create vectors of objects by concatenating things together.
Correct Answer is : scandir()
4. Which of the following statement is invalid ?
Correct Answer is : error
5. What would be the result of following code ? > x <- 6 > class(x)
Correct Answer is : red
6. What will the following code print ? > x <- 0:6 > as.logical(x)
Correct Answer is : The number is: 0
7. Which of the following is invalid assignment ?
Correct Answer is : 1.23E+14
8. What would be the output of the following code ? > sqrt(-17)
Correct Answer is : *********
9. Which of the following code constructs vector of length 11 ?
Correct Answer is : infinite loop
10. _______ function returns a vector of the same size as x with the elements arranged in increasing order
Correct Answer is : no output
11. Which of the following is used for generating sequences ?
Correct Answer is : In for loopAfter for loop
12. Which of the following statement would print “0” “1” “2” “3” “4” “5” “6” for the following code ? > x <- 0:6
Correct Answer is : After for loop
13. What would be the result of following code ? x <- c("a", "b", "c") > as.numeric(x)
Correct Answer is : In for loopIn for loopIn for loopIn for loop……infinitely
14. What would the following code print ? > x <- c("a", "b", "c") > as.logical(x)
Correct Answer is : Hello….36 times
15. What would be the output of the following code ? > m <- matrix(nrow = 2, ncol = 3) > dim(m)
Correct Answer is : Hello….36 times
16. What would be the output of the following code ? > m <- matrix(1:6, nrow = 2, ncol = 3) > m
Correct Answer is : Infinite
17. What would the following code print ? > m <- 1:10 > m
Correct Answer is : Infinite
18. .What would the following code print ? > x <- 1:3 > y <- 10:12 > cbind(x, y)
Correct Answer is : 20
19. Find the following type of vector? a <- c(1,2,5.3,6,-2,4)
Correct Answer is : 20
20. All columns in a matrix must have the same mode and the _________ length.
Correct Answer is : hihihi
