R PROGRAMMING QUIZ DESCRIPTION Total Questions −30 00 Max Time − 15:00 What will be output for the following code? print(mean(25:82)) 1526 53.5 50.5 55 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 () What will be output for the following code? paste("a", "b", se = ":") a+b a:b a-b None of the above Command lines entered at the console are limited to about ________ bytes 4095 4096 4097 4098 Which function is preferred over sapply as vapply allows the programmer to specific the output type? Lapply Japply Vapply Zapply How will you check if an element is present in a vector? Match() Dismatch() Mismatch() Search() Which one is true about R packages ? (a) the fundamental unit of shareable code (b) They are stored under a directory called "library" in the R environment (c) A collection of R functions, c a c d b a c b d D b a c B d a c Which of the following is true about R? R is a well-developed, simple and effective programming language R has an effective data handling and storage facility R provides a large, coherent and integrated collection of tools for data analysis. All of the above Who created R? Dennis Ritchie John Chambers jarne Stroustrup Ross Ihaka R is an__________programming language? Closed source GPL Open source Definite source In R studio, Scripts will run on ___________________ Script editors Console Terminal GCC compiler Which of the following finds the maximum value in the vector x rm(x) all(x) max(x) maximum(x) Predictive analysis is the branch of __________analysis? Advanced Core Both the above 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 How many steps does the predictive analysis process contained? 5 6 7 8 You can check to see whether an R object is NULL with the _________ function. is.null() is.nullobj() null() as.nullobj() In the base graphics system, which function is used to add elements to a plot? Boxplot() Text() Treat() Both A and B R was named partly after the first names of____R authors? 1 2 3 4 _________code is used for scatter plot in R. scatter.plain() scatter() plot() None of these R language is a dialect of which of the following languages? s c sas matlab _________code is used to run linear regression model in R. linear.model() sum() lm() None of the above R is an interpreted language so it can access through_____________? Disk operating system User interface operating system Operating system Command line interpreter R was created by? Ross Ihaka Robert Gentleman Both A and B Ross Gentleman R is free software distributed under a GNU-style copy left, and an official part of the GNU project called? GNU A GNU S GNU L GNU R R files has an extension _____. S RP R SP R was named partly after the first names of____R authors? One Two Three Four Many quantitative analysts use R as their____tool? Leading tool Programming tool Both the above ______command is used to exit R programming? quit() qu() exit None of these R allows integration with the procedures written in the? C Ruby Java Basic _________ function is used to watch for all available packages in library lib() fun.lib() libr() library Previous Next Total Question16 Wrong Answer13 Right Answer13
