PHP Interview Questions - 25 | Snaprecruit.com
PHP Interview Questions - 25 | Snaprecruit.com
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PHP interview questions part 25
PHP interview questions part 25
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Total Questions: 20
1. Which of the following object is masked from ‘package: stats’?
A. 20
B. true0
C. 0
D. true20
Show Correct Answer
Correct Answer is :
true0
2. The _________ function can be used to select columns of a data frame that you want to focus on.
A. No 2
B. Yes 1
C. Yes 2
D. No 1
Show Correct Answer
Correct Answer is :
No 2
3. ________ function is similar to the existing subset() function in R but is quite a bit faster.
A. 5
B. 4
C. 3
D. error
Show Correct Answer
Correct Answer is :
5
4. Columns can be arranged in descending order too by using the special ____ operator.
A. 869
B. 742
C. 368
D. error
Show Correct Answer
Correct Answer is :
869
5. The _________ function is used to generate summary statistics from the data frame within strata defined by a variable.
A. 58
B. 59
C. 109
D. 108
Show Correct Answer
Correct Answer is :
59
6. The ______ operator allows you to string operations in a left-to-right fashion.
A. 2
B. 12
C. 1
D. 21
Show Correct Answer
Correct Answer is :
2
7. There is an SQL interface for relational databases via the _______ package.
A. 16
B. 6
C. 15
D. 5
Show Correct Answer
Correct Answer is :
16
8. dplyr can be integrated with the ________ package for large fast tables.
A. 5
B. 0
C. 10
D. 1
Show Correct Answer
Correct Answer is :
1
9. .Which of the following function is similar to summarize ?
A. 24
B. 3.7
C. 3.85
D. 0
Show Correct Answer
Correct Answer is :
24
10. ______ let’s you perform SQL queries on your R data frames.
A. no output
B. error
C. 6
D. 7
Show Correct Answer
Correct Answer is :
error
11. ______ splits a data frame and results an array (hence the da). Hopefully you’re getting the idea here.
A. 5
B. error
C. 6
D. 7
Show Correct Answer
Correct Answer is :
error
12. ________ makes it incredibly easy to fit time series models like ARIMA, ARMA, AR, Exponential Smoothing, etc.
A. 5
B. error
C. 6
D. 7
Show Correct Answer
Correct Answer is :
5
13. ________ provides needed string operators in R.
A. 5
B. error
C. 6
D. 7
Show Correct Answer
Correct Answer is :
6
14. Which of the following syntax is used to install forecast package ?
A. 5
B. error
C. 6
D. 7
Show Correct Answer
Correct Answer is :
5
15. Which of the following convert a matrix of phi coefficients to polychoric correlations ?
A. 1
B. 0
C. 2
D. 3
Show Correct Answer
Correct Answer is :
3
16. Which of the following is used to plot multiple histograms ?
A. 16
B. 6
C. 15
D. 5
Show Correct Answer
Correct Answer is :
16
17. Which of the following count the number of good cases when doing pairwise analysis ?
A. 1
B. 0
C. 2
D. 3
Show Correct Answer
Correct Answer is :
1
18. Which of the following gives the summary of values likes mean etc ?
A. 3
B. 4
C. 5
D. error
Show Correct Answer
Correct Answer is :
error
19. .The purpose of correct.cor is to correct _________ in values.
A. 1
B. TRUE
C. FALSE
D. 0
Show Correct Answer
Correct Answer is :
1
20. In practice, Line of best fit or regression line is found when _____________
A. 1
B. no output
C. error
D. 0
Show Correct Answer
Correct Answer is :
no output
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