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PHP interview questions part 29
PHP interview questions part 29
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Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. Which of the following operator is used to create integer sequences?
A. strtoupper()
B. uppercase()
C. str_uppercase()
D. struppercase()
Show Correct Answer
Correct Answer is :
strtoupper()
2. What will be the output of the following R program? y<-0:5 vector(y) y[3]
A. O’Malley Wins The Heavyweight Championship!
B. O’malley Wins The Heavyweight Championship!
C. O’Malley wins the heavyweight championship!
D. o’malley wins the heavyweight championship!
Show Correct Answer
Correct Answer is :
o’malley wins the heavyweight championship!
3. In R language, a vector is defined that it can only contain objects of the ________
A. SaladSaladSaladSaladSalad is good
B. is good SaladSaladSaladSaladSalad
C. is good Salad
D. Salad is good
Show Correct Answer
Correct Answer is :
Salad is good
4. A list is represented as a vector but can contain objects of ___________
A. explode()
B. implode()
C. concat()
D. concatenate()
Show Correct Answer
Correct Answer is :
implode()
5. How can we define ‘undefined value’ in R language?
A. strlastpos()
B. strpos()
C. strlast()
D. strrpos()
Show Correct Answer
Correct Answer is :
strrpos()
6. What is NaN called?
A. Contact the author of this article at [email protected]@mple.com
B. [email protected] the @uthor of this @rticle @t [email protected]@[email protected]
C. Contact the author of this article at [email protected]@[email protected]
D. Error
Show Correct Answer
Correct Answer is :
Contact the author of this article at [email protected]@[email protected]
7. How can we define ‘infinity’ in R language?
A. [email protected]
B. nachiketh
C. [email protected]
D. example.com
Show Correct Answer
Correct Answer is :
example.com
8. What is the output of the following code? y <- c(TRUE, 2)
A. hihellohi1
B. hi
C. hihi1
D. hi1
Show Correct Answer
Correct Answer is :
hihellohi1
9. What is the class defined by the following code? y<-c(2,”t”)
A. hihellohi1
B. hello
C. hihi1
D. hi1
Show Correct Answer
Correct Answer is :
hello
10. What is the class defined in the following code? y<-c(FALSE,2)
A. hihellohi1
B. no output
C. hihi1
D. hi1
Show Correct Answer
Correct Answer is :
no output
11. Which one of the following is not a basic datatype?
A. hihellohi1
B. hi
C. hihello
D. hi1
Show Correct Answer
Correct Answer is :
hi
12. How do you create an integer suppose 5 in R?
A. hihellohi1
B. hi
C. hihello
D. hello
Show Correct Answer
Correct Answer is :
hello
13. What is the output of the following code? x<- c (“a”,” b”) as.numeric(x)
A. hihellohi1
B. hi
C. hihello
D. hello
Show Correct Answer
Correct Answer is :
hihellohi1
14. The dimension attribute is itself an integer vector of length _______
A. error
B. hi
C. hihello
D. hello
Show Correct Answer
Correct Answer is :
error
15. How could be the matrix constructed by using the following code? m <- matrix(1:6, nrow = 2, ncol = 3)
A. 1hello
B. 1hi
C. 1hi1
D. error
Show Correct Answer
Correct Answer is :
1hi
16. Matrices can be created by row-binding with the help of the following function.
A. hello
B. hi
C. no output
D. error
Show Correct Answer
Correct Answer is :
no output
17. What is the function used to test objects (returns a logical operator) if they are NA?
A. hello
B. hi
C. no output
D. error
Show Correct Answer
Correct Answer is :
no output
18. What is the function used to test objects (returns a logical operator) if they are NaN?
A. Error
B. Hello World
C. Nothing
D. Missing semicolon error
Show Correct Answer
Correct Answer is :
Nothing
19. What is the function to set column names for a matrix?
A. Error
B. Hello World
C. Nothing
D. Missing semicolon error
Show Correct Answer
Correct Answer is :
Error
20. Which of the following is similar to Moment.js ?
A. Hello world
B. Hello World Hello World
C. Hello world
D. Syntax Error
Show Correct Answer
Correct Answer is :
Syntax Error
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