PHP Interview Questions - 19 | Snaprecruit.com

PHP Interview Questions - 19 | Snaprecruit.com

PHP interview questions part 19

PHP interview questions part 19

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Total Questions: 20

1. How is a Data object represented internally in R language?

Correct Answer is : self

2. Which package in R supports the exploratory analysis of genomic data?

Correct Answer is : Making a method call using parent

3. __________ can contain heterogeneous inputs.

Correct Answer is : $this

4. ________ function can be used to add datasets in R provided with the columns in the datasets should be the same.

Correct Answer is : PHP Data Object

5. _________ variables are categorical variables which can hold either string or numeric values.

Correct Answer is : PHP 5

6. What is the memory limit in R for 64 bit system?

Correct Answer is : const

7. What is the memory limit in R for 32 bit system?

Correct Answer is : const NAME

8. What are the data types in R on which binary operators can be applied?

Correct Answer is : Parse Error

9. __________ function is used in applying a function each level of factors.

Correct Answer is : 4

10. How do you create log linear models in R language?

Correct Answer is : abstract class

11. What will be the class of the vector if you concatenate a number and NA?

Correct Answer is : abstract

12. ____________ is one type of the simplest machine learning classification algorithms that is a subset of supervised learning based on lazy learning.

Correct Answer is : abstract public function write();

13. What will be the class of the vector if you concatenate a number and a character?

Correct Answer is : One

14. R code can be tested using _________________ package.

Correct Answer is : implements

15. If the programmers want the output to be a data frame or a vector, then ________ function is used.

Correct Answer is : PHP 5.3

16. If a programmer wants the output to be a list then ___________ function is used.

Correct Answer is : getPrevious()

17. _____________ function is preferred over sapply as vapply allows the programmer to specific the output type.

Correct Answer is : throw

18. Which function is difficult to implement?

Correct Answer is : final

19. Which function is more verbose?

Correct Answer is : overloading

20. _____________ will produce a sequential vector c( (1,2,3,4,5,6,7,8,9)).

Correct Answer is : __set()

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