The (variableType).size() function is used to check the memory usage of different types of variable. (VariableType refers int, float etc).

Which of the following R code will print “Hello, world!”?

Which of the following is correct about variable?

If a <- c(1,3,5,6,1) and b <-c(1,7,2) the a*b = _______

What will be the output of the following R code?

> f <- function(num) {
+ hello <- "Hello, world!\n"
+ for(i in seq_len(num)) {
+                    cat(hello)
+ }
+                    chars <- nchar(hello) *
 num
+
                    chars
+ }
> meaningoflife <- f(3)
> print(meaningoflife)

What will be the output of the following R code snippet?

> f <- function(a, b) {
+       a^2
+ }
> f(2)

> f <- function(num = 1) {
+        hello <- "Hello, world!\n"
+        for(i in seq_len(num)) {
+                cat(hello)
+         }
+         chars <- nchar(hello) *
 num
+
         chars
+ }
> f()

What will be the output of the following R code snippet?
> f <- function(a, b) {
+              print(a)
+              print(b)
+ }
> f(45)

A character vector in R contains elements of text (strings). Each element of a character vector is enclosed in quotation marks, either single (') or double (").  If a numeric value is present inside the quotation marks, it will be treated as a string.

Which function would you use to check if an object is a data frame in R?