MSTIP - Data Mining - Midterm Exam

If x<-4; then typeof(x) is

• Character

• Double

• Logical

If x<-4 and y<-5 then x+y is

• 7

• 9

• 1

If y<-"b"; then typeof(y) is

• Character

• Double

• Logical

If y<-T; then typeof(y) is

• Character

• Double

• Logical

x <- c("what","is","truth")

if("Truth" %in% x) {

print("Truth is found")

} else {

print("Truth is not found")

}

• Truth is not found

• Truth is found

x <- c("what","is","truth")

 

if("Truth" %in% x) {

   print("Truth is found the first time")

} else if ("truth" %in% x) {

   print("truth is found the second time")

} else {

   print("No truth found")

}

• Truth is found the first time

• truth is found the second time

• No truth found

If m1 <- matrix(c(T, T, F, F, T, F), nrow = 2)

then the order of m1 is

• 2 x 3

• 2 x 1

• 3 x 2

If x<-4; y<-3 then x*y is

If m1 <- matrix(1:8, nrow = 2)

then m1[2,1] is

If m1 <- matrix(1:8, nrow = 2,byrow=T)

then m1[2,1] is