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R Programming
R Programming Interview
Quiz 1
Solution
Q.1.
Which of the following statement is invalid?
a) x <- c(1+0i, 2+4i)
b) x <- c(TRUE, FALSE)
c) x <- c(T, F)
d) None of the mentioned
Q.2.
Point out the correct statement?
a) Use explicit TRUE and FALSE values when indicating logical values
b) rm command is used to remove objects in R
c) R operates on named data structures
d) All of the mentioned
Q.3.
What will be the output of the following R code? > x <- 6 > class(x)
a) “integer”
b) “numeric”
c) “real”
d) “imaginary”
Q.4.
What will be the output of the following R code? > x <- 0:6 > as.logical(x)
a) FALSE TRUE TRUE TRUE TRUE TRUE TRUE
b) “0” “1” “2” “3” “4” “5” “6”
c) 0 1 2 3 4 5 6
d) 6 5 5 3 2 1
Q.5.
Point out the correct statement?
a) The usual operator, <-, can be thought of as a syntactic shortcut to expression operation
b) Assignment can also be made using the function assignment()
c) Vectors can be used in arithmetic expressions, in which case the operations are performed element by element
d) seq() is used to delete the numbers
Q.6.
Which of the following is invalid assignment?
a)
b)
c)
d) None of the mentioned
Q.7.
What will be the output of the following R code? > c(10.5.3.6.21.-> x
a) -4.02
b) 4.02
c) NaN
d) 3.67
Q.8.
Which of the following code constructs vector of length 11?
a)
b)
c)
d)
Q.9.
_______ function returns a vector of the same size as x with the elements arranged in increasing order.
a) sort()
b) orderasc()
c) orderby()
d) sequence()
Q.10.
Which of the following is used for generating sequences?
a) seq()
b) sequence()
c) order()
d) orderasc()
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