R interview questions part 9
R interview questions part 9
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. A _________ is a two-dimensional rectangular data set.
Correct Answer is : Matrix
2. Which function takes a dim attribute which creates the required number of dimensions?
Correct Answer is : Array
3. Factors are the r-objects which are created using a _________
Correct Answer is : Vector
4. Factors are created using the _______ function.
Correct Answer is : Function()
5. By what function we can create data frames?
Correct Answer is : Data.frames()
6. vectors can be one of two types namely atomic vectors and _______
Correct Answer is : Lists
7. Lists can be coerced with which function?
Correct Answer is : As.lists
8. A data frame is a special type of list where every element of the list has ______ length.
Correct Answer is : Same
9. Data frames can have additional attributes such as __________
Correct Answer is : Rownames()
10. Decimal values are referred as ________ data types in R.
Correct Answer is : Numeric
11. Which is the basic data structure of R containing the same type of data?
Correct Answer is : Vector
12. In R using the function, ________ one can check the data type of vector.
Correct Answer is : Typeof()
13. __________are Data frames which contain lists of homogeneous data in a tabular format.
Correct Answer is : Lists
14. The four most frequently used types of data objects in R are vectors, matrices, data frames and ________
Correct Answer is : Lists
15. A __________ is a set of elements appearing in rows and columns where the elements are of the same mode whether they are logical, numeric (integer or double), complex or character.
Correct Answer is : Matrix
16. What is the simplest way of creating the vector?
Correct Answer is : C function
17. Which function replicates elements of vectors?
Correct Answer is : Rep
18. The ________ function creates a regular sequence of values to form a vector.
Correct Answer is : seq
19. Which function is used to enter in data at the terminal?
Correct Answer is : Scan
20. Computation with vectors is achieved using an element-by-element operation for avoiding _________
Correct Answer is : Loops
