Q121: A key property of vectors in R language is that
- A. A vector cannot have attributes like dimensions
- B. Elements of a vector can be of different classes
- C. Elements of a vector can only be a character or numeric
- D. Elements of a vector all must be of the same class
Answer
Answer D. Elements of a vector all must be of the same class
Q122: ___is used to continue an iteration of a loop
- A. next
- B. skip
- C. group
- D. All of the mentioned
Answer
Answer A. next
Q123: Functions are defined using the___directive and are stored as R objects
- A. function()
- B. funct()
- C. functions()
- D. All of the mentioned
Answer
Answer A. function()
Q124: Which of the following is multivariate version of lapply?
- A. apply()
- B. lapply()
- C. sapply()
- D. mapply()
Answer
Answer D. mapply()
Q125: A function, together with an environment, makes up what is called a___closure
- A. formal
- B. function
- C. reflective
- D. All of the mentioned
Answer
Answer B. function
Q126: The___function is used to plot negative likelihood
- A. plot()
- B. graph()
- C. graph.plot()
- D. None of the mentioned
Answer
Answer A. plot()
Q127: ___is a subset of___
- A. Information design, visual modality
- B. Information design, data visualization
- C. None of the answers are correct
- D. Data visualization, information design
Answer
Answer A. Information design, visual modality
Q128: Which of the answers is an example of the kinesthetic modality?
- A. A speech
- B. A movie
- C. A picture
- D. The rain on our face
Answer
Answer B. A movie
Q129: What area represents information in a graphical or pictorial form?
- A. Data design
- B. None of the answers are correct
- C. Information design
- D. Data visualization
Answer
Answer C. Information design
Q130: Which of the following is an example of a temporal data visualization?
- A. A Gnatt chart that is use in project management
- B. A histogram that represents proportions
- C. A matrix representing interconnecting data among various entities
- D. A 3D molecular rendering of a protein
Answer
Answer D. A 3D molecular rendering of a protein
Q131: By definition, Tableau displays measures over time as a___
- A. Bar
- B. Line
- C. Histogram
- D. Scatter Plots
Answer
Answer D. Scatter Plots
Q132: How do you identify a continuous field in Tableau?
- A. It is identified by a blue pill in the visualization
- B. It is identified by a green pill in a visualization
- C. It is preceded by a # symbol in the data window
- D. When added to the visualization, it produces distinct values
Answer
Answer A. It is identified by a blue pill in the visualization
Q133: For creating variable size bins we use___
- A. Sets
- B. Groups
- C. Calculated fields
- D. Table Calculations
Answer
Answer B. Groups
Q134: Which of the following is not a Trend Line model
- A. Linear Trend Line
- B. Exponential Trend Line
- C. Binomial Trend Line
- D. Logarithmic Trend Line
Answer
Answer C. Binomial Trend Line
Q135: Data cleaning consists primarily in implementing___strategies before they occur
- A. error prevention
- B. error detection
- C. indicating error
- D. none of the above
Answer
Answer A. error prevention
Q136: data errors will be detected incidentally during activities
- A. When collecting or entering data
- B. When transforming/extracting/transferring data
- C. When exploring or analysing data
- D. When submitting the draft report for peer review
Answer
Answer A. When collecting or entering data
Q137: Data cleaning involves repeated cycles of
- A. screening
- B. diagnosing
- C. treatment and
- D. documentation of this process
- E. All the above
Answer
Answer E. All the above
Q138: After measurement,___are the object of a sequence of typical activities
- A. Data
- B. Information
- C. Record
- D. None of the above
Answer
Answer C. Record
Q139: Under the lattice graphics system, what do the primary plotting functions like xyplot() and bwplot() return?
- A. nothing; only a plot is made
- B. an object of class “lattice”
- C. an object of class “trellis”
- D. an object of class “plot”
Answer
Answer A. nothing; only a plot is made
Q140: Which of the following functions can be used to annotate the panels in a multipanel lattice plot?
- A. axis()
- B. text()
- C. panel.abline()
- D. points()
- E. lines()
Answer
Answer B. text()
Q141: In the lattice system, which of the following functions can be used to finely control the appearance of all lattice plots?
- A. par()
- B. splom()
- C. print.trellis()
- D. trellis.par.set()
Answer
Answer B. splom()
Q142: What is ggplot2 an implementation of?
- A. a 3D visualization system
- B. the Grammar of Graphics developed by Leland Wilkinson
- C. the base plotting system in R
- D. the S language originally developed by Bell Labs
Answer
Answer C. the base plotting system in R
Q143: What is a geom in the ggplot2 system?
- A. a method for mapping data to attributes like color and size
- B. a method for making conditioning plots
- C. a statistical transformation
- D. a plotting object like point, line, or other shape
Answer
Answer A. a method for mapping data to attributes like color and size
