R PROGRAMMING QUIZ DESCRIPTION

_______ generate random Normal variates with a given mean and standard deviation.

  • dnorm
     


  •     rnorm
     


  •     pnorm
      


  •     rpois

R language is a dialect of which of the following languages?

  • s

  • c

  • sas

  • matlab

Packages are useful in collecting sets into a_____unit ?

  • Single
     


  •  Multiple

An R function is created by using the keyword?

  • fun

  • function

  • declare

  • extends

In R studio, Scripts will run on ___________________

  • Script editors
        

  •     Console
        

  •  Terminal
       

  • GCC compiler

R is an__________programming language?

  • Closed source
     


  • GPL
     


  • Open source
     


  • Definite source

How many atomic vector types does R have?

  • 3

  • 4

  • 5

  • 6

Which function is preferred over sapply as vapply allows the programmer to specific the output type?

  • Lapply

  • Japply

  • Vapply

  • Zapply

What will be output for the following code?
print(mean(25:82))

  • 1526

  • 53.5

  •  50.5

  • 55

_________ function is used to watch for all available packages in library

  • lib()

  • fun.lib()

  • libr()

  • library

How will you check if an element is present in a vector?

  • Match()

  • Dismatch()

  • Mismatch()

  • Search()

Which function in R language is used to find out whether the means of 2 groups are equal to each other or not?
 

  • f.tests ()

  •  l.tests ()

  • t.tests ()

  • p.tests ()

In the base graphics system, which function is used to add elements to a plot?

  • Boxplot()

  •  Text()

  • Treat()

  •  Both A and B

How many steps does the predictive analysis process contained?

  • 5

  • 6

  • 7

  • 8

R allows integration with the procedures written in the?

  • C

  • Ruby

  • Java

  • Basic

Many quantitative analysts use R as their____tool?

  • Leading tool
     

  • Programming tool
     

  • Both the above

If I were to create a web application, what 2 languages may I use?

  • SQL, Ruby
     

  •   Ruby, Python
      

  •  Python, CSS
      

  •  Ruby, JS

R was named partly after the first names of____R authors?

  • 1

  • 2

  • 3

  • 4

A brief description for Python is....

  • Python is an interpreted, object-oriented, high-level programming language with dynamic semantics. Python's simple, easy to learn syntax emphasizes readability and therefore reduces the cost of program maintenance. Python supports modules and packa

  • Python is used to create databases and store information for apps, and uses clauses like SELECT and CREATE TABLE

  • Python is used to animate webpages, make drawing and animations, make simple games, and has 6 primitives.

  • none of the above

_________ is used to make predictions about unknown future events?

  • Descriptive analysis
     

  •  Predicitive analysis
     

  • Both the above

______command is used to exit R programming?
 

  • quit()
       


  •     qu()
       


  •     exit
        


  •     None of these

Point out the wrong statement?

  • Setting up a workstation to take full advantage of the customizable features of R is a straightforward thing

  • q() is used to quit the R program

  • R has an inbuilt help facility similar to the man facility of UNIX

  • Windows versions of R have other optional help systems also

_________code is used to run linear regression model in R.
    


  • linear.model()
     

  • sum()
     

  •   lm()
       

  •    None of the above

Who developed R?

  • Dennis Ritchie
     


  • John Chambers
     

  • .Bjarne Stroustrup

Predictive analysis is the branch of __________analysis?

  • Advanced
     

  •  Core
     

  •  Both the above

How many steps does the predictive analysis process contained?

  • 5

  • 6

  • 7

  • 8

What will be the output of the following R code? x <- c(3, 7, NA, 4, 7) y <- c(5, NA, 1, 2, 2) x + y

  • Symbol

  • missing Data

  • 5

  • 5.5

_______is used for comments

  • %
     


  •     #
     


  •     -
     


  •     \

Which of the following finds the maximum value in the vector x

  • rm(x)
        


  •     all(x)
       


  •     max(x)
     


  •     maximum(x)

What will be output for the following code?
paste("a", "b", se = ":")
 

  • a+b

  • a:b

  •  a-b

  • None of the above