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Correct choice is (a) <-

For EXPLANATION: The OPERATORS <- and = can be used, almost interchangeably, to assign to a variable in the same environment. The assignment operator is a left-pointing arrow, so creating and declaring variables LOOKS like this:

FOO

The correct option is (B) R

Best explanation: R is a programming language and FREE software environment for statistical computing and GRAPHICS supported by the R FOUNDATION for Statistical Computing. R is an extension of and successor to the S language, which was itself a statistical language.

The correct option is (c) location.hash

To elaborate: The hash property sets or returns the anchor PART of a URL, including the hash sign (#). The property location.hash needs to be UPDATED to display the updated URL in the location BAR.

The CORRECT option is (B) SimpleXMLElement()

For explanation I would say: file_get_contents() is the preferred way to read the CONTENTS of a file into a string. It will USE MEMORY mapping techniques if supported by your OS to enhance performance. The API returned by the method file_get_contents() can be converted into an XML object using the method SimpleXMLElement().

Correct option is (c) RTOOLS

The best I can explain: Rtools provide the tools to build R and R packages. The PC INSTALLER comes in THREE flavors: Base is the base install, Contrib comes with compiled third-party packages, and Rtools comes with tools to build your own R packages.

Right answer is (c) #

EXPLANATION: ‘#’ is USED to COMMENT a LINE. A single line comment can be MADE in R.

Right choice is (d) All of the mentioned

Explanation: R is an integrated suite of software facilities for data manipulation, CALCULATION and graphical DISPLAY. Within R, processing the data, splitting it, averaging it, aggregating it, OVERLAYING TWO or more data sets, and then from with R, a chart that depicts the data out is done.

The CORRECT answer is (c) To get the server’s response

For explanation I WOULD SAY: The file_get_contents() is a PHP’s native function USED to hit the URL and read the server’s response into

a variable $wpt_response:

The correct option is (B) Draw other shapes

The best EXPLANATION: The symbols() function can be used to draw other shapes on a PLOT; for more information about this type ?symbols at the R console. One of six symbols; circles, squares, rectangles, stars, thermometers, and boxplots, can be plotted at a specified set of X and y coordinates.

The correct answer is (b) Two dimensional

For EXPLANATION I would say: Matrices are like strictly TYPED two-dimensional arrays. You create a matrix using the matrix FUNCTION, which accepts five parameters: a vector to use as the CONTENT, the number of rows to shape the content into, the number of columns to shape the content into, an optional boolean value to indicate whether the content should be shaped by row or by column (the default is FALSE for by column), and a list that contains VECTORS for row names and column names:

matrix([content vector], nrow=[number of rows], ncol=[number of columns], byrow=[how to sort], dimnames=[vector of row names, vector of column names]).

The correct answer is (b) Base

To elaborate: Base is the binaries for base DISTRIBUTION. The PC INSTALLER COMES in three flavors: Base is the base install, Contrib comes with COMPILED third-party packages, and Rtools comes with tools to build your own R packages.