PHP interview questions part 6
PHP interview questions part 6
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. which of the following statement chose those objects meeting a logical criterion ?
Correct Answer is : echo “\$x”;
2. Which of the following statement is another way to get a subset ?
Correct Answer is : 123
3. Which of the following sort a dataframe by the order of the elements in B
Correct Answer is : clueget
4. Which of the following is Mac menu command ?
Correct Answer is : 1
5. _____ list the variables in the workspace
Correct Answer is : \n
6. ___________ remove all the variables from the workspace
Correct Answer is : What is her age? \n She is $num years old
7. Which of the following code will drop the nth column ?
Correct Answer is : All of the mentioned.
8. Which of the following code drop the ith and jth column ?
Correct Answer is : I love arsenalI love manc
9. Which of the following statement find cases with no missing values ?
Correct Answer is : All of the mentioned
10. Which of the following statement is normal distribution ?
Correct Answer is : AshleyBaleBlank
11. which of the following statement gives cumulative sum ?
Correct Answer is : 5
12. Which of the following is uniform distribution ?
Correct Answer is : a is 4 and b is 3
13. Which of the following truncates real x to integers ?
Correct Answer is : Rasmus Lerdorf
14. Which of the following tests each element of x for membership in y?
Correct Answer is : PHP is a scripting language
15. Which of the following finds the maximum value in the vector x, exclude missing values
Correct Answer is : no output
16. Which of the following produces the variance covariance matrix ?
Correct Answer is : PHP is a scripting language
17. Which of the following will reverse the order of values in x ?
Correct Answer is : ERROR
18. Which of the following finds row sums for each level of a grouping variable ?
Correct Answer is : 2
19. Which of the following statement applies the function (FUN) to either rows (1) or columns (2) on object X ?
Correct Answer is : ERROR
20. Which of the following statement finds the maximum for each column ?
Correct Answer is : I have a valueI have a value
