Interview question based on skill :
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. Collection of objects currently stored in R is called as :
Correct Answer is : 0
2. What is the output of the following function? ab <- list(1, 2, 3, "X", "Y", "Z") dim(ab) <- c(3,2) print(ab)
Correct Answer is : This is India
3. What is the meaning of the following function? x <- c(4, 5, 1, 2, 3, 3, 4, 4, 5, 6) x <- as.factor(x)
Correct Answer is : My car is a Volvo
4. What is the meaning of the following function? print( sqrt(2) )
Correct Answer is : 16
5. What is the output of the following function? d <- date() d
Correct Answer is : 16
6. What is the output of the following function? paste("Everybody", "is", “a” , "warrior")
Correct Answer is : Fatal run-time error
7. What is the output of the following function? cat("Everybody", "is", "a", “warrior”,sep="*")
Correct Answer is : Fatal run-time error
8. What is the output of the following function? nchar()
Correct Answer is : PHP 5
9. What is the output of the following function? d <- diag(5, nrow=2, ncol=2) d
Correct Answer is : PHP 5
10. What is the output of the following function? Sys.Date()
Correct Answer is : ~
11. What is the output of the following function? Sys.time()
Correct Answer is : ~
12. Which of the following is valid syntax for if else statement in R ?
Correct Answer is : error_reporting = E_ERROR | E_COMPILE_ERROR | E_CORE_ERROR
13. Which of the following syntax is correct for while loop ?
Correct Answer is : error_reporting = E_ERROR | E_COMPILE_ERROR | E_CORE_ERROR
14. Which of the following code generate a uniform random number ?
Correct Answer is : PHP 5.2
15. _______ is used to break the execution of a loop.
Correct Answer is : PHP 5.2
16. Which of the following code generate a sequence of integers from 1 to 10 ?
Correct Answer is : ignore_repeated_errors
17. Which of the following statement can be used to explicitly control looping ?
Correct Answer is : ignore_repeated_errors
18. Which of the following should be preferred for evaluation from list of alternatives ?
Correct Answer is : define_syslog_variable()
19. .What will be the output of the following code ? > x <- c("a", "b", "c", "d") > for(i in 1:4) { + ## Print out each element of 'x' + print(x[i]) + }
Correct Answer is : define_syslog_variable()
20. Which of the following code skips the first 20 iterations?
Correct Answer is : LOG_CONS
