Interview question based on skill :
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Total Questions: 20
1. What will be the output of following code ? > g <- function(x) { + a <- 3 + x+a+y + ## 'y' is a free variable + } > y <- 3 > g(2)
Correct Answer is : 3
2. ________ generate random Normal variates with a given mean and standard deviation
Correct Answer is : 1
3. ______ evaluate the cumulative distribution function for a Normal distribution
Correct Answer is : hello
4. _______ generate random Poisson variates with a given rate
Correct Answer is : Hi is printed once, hello 7 times and then hi 2 times
5. Which of the following evaluate the Normal probability density (with a given mean/SD) at a point ?
Correct Answer is : infinite loop
6. _________ is the most common probability distribution to work with.
Correct Answer is : infinite loop
7. What will be the output of the following code ? > x <- rnorm(10) > x
Correct Answer is : 4hello4hello4hello4hello4hello…..infinite
8. What will be the output of the following code ? > x <- rnorm(10) > summary(x)
Correct Answer is : 555555555…infinitely
9. What will be the output of the following code ? > pnorm(2)
Correct Answer is : 54321111111….infinitely
10. _________ ensures reproducibility of the sequence of random numbers.
Correct Answer is : 1234567891011121314….infinitely
11. 5 Normal random numbers can be generated with rnorm() by setting seed value to :
Correct Answer is : no output
12. _______ function is used to simulate binary random variables.
Correct Answer is : 00000000000000000000….infinitely
13. What will be the output of the following code > > set.seed(10) > x <- rbinom(100, 1, 0.5) > str(x)
Correct Answer is : 210
14. __________ distribution is commonly used to model data that come in the form of counts.
Correct Answer is : infinite loop
15. What will be the output of the following code ? > rpois(10, 1)
Correct Answer is : MySQL
16. Which of the following code represents count with mean of 2 ?
Correct Answer is : mysqli
17. What will be the output of the following code ? > set.seed(20) > x <- rnorm(100) > e <- rnorm(100, 0, 2) > y <- 0.5 + 2 * x + e > summary(y)
Correct Answer is : extension=php_mysqli.dll
18. Which of the following extracts first element from the following vector ? > x <- c("a", "b", "c", "c", "d", "a")
Correct Answer is : PHP 5.3
19. Which of the following extracts first four element from the following vector ? > x <- c("a", "b", "c", "c", "d", "a")
Correct Answer is : CREATE TABLE table_name (column_name column_type);
20. What would be the output of the following code ? > x <- c("a", "b", "c", "c", "d", "a") > x[c(1, 3, 4)]
Correct Answer is : $mysqli = new mysqli()
