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Data analytics Quiz 5

1. Point out the correct statement. a) Hadoop do need specialized hardware to process the data b) Hadoop 2.0 allows live stream processing of real-time data c) In Hadoop programming framework output files are divided into lines or records d) None of the mentioned

Answer: b Explanation: Hadoop batch processes data distributed over a number of computers ranging in 100s and 1000s

2. __________ can best be described as a programming model used to develop Hadoop-based applications that can process massive amounts of data. a)MapReduce b) Mahout c) Oozie d) All of the mentioned Answer: a Explanation: MapReduce is a programming model and an associated implementation for processing and generating large data sets with a parallel, distributed algorithm.

3. Facebook Tackles Big Data With _______ based on Hadoop. a)‘Project Prism’ b)‘Prism’ c)‘Project Big’ d)‘Project Data’ Answer: a Explanation: Prism automatically replicates and moves data wherever it’s needed across a vast network of computing facilities.

4. What is the difference between interval/ratio and ordinal variables? a) The distance between categories is equal across the range of interval/ratio data b) Ordinal data can be rank ordered, but interval/ratio data cannot. c) Interval/ratio variables contain only two categories. d) Ordinal variables have a fixed zero point, whereas interval/ratio variables do not

Ans (a) The distance between categories is equal across the range of interval/ratio data..

5. What is the difference between a bar chart and a histogram? a) Bar charts represent numbers, whereas histograms represent percentages b) histogram does not show the entire range of scores in a distribution. c) There are no gaps between the bars on a histogram. d) Bar charts are circular, whereas histograms are square. Ans (c) There are no gaps between the bars on a histogram.

6. Which of the following data is put into a formula to produce commonly accepted results? a) Raw b) Processed c) Synchronized d) All of the Mentioned View Answer Answer: b

7. Point out the correct statement. a) coplots are one dimensional data graph b) Exploratory graphs are made quickly c) Exploratory graphs are made relatively less in number d) All of the mentioned View Answer Answer: a Explanation: coplot is used for two dimensional representation.

8. Which of the following graph can be used for simple summarization of data? a) Scatterplot b) Overlaying c) Barplot d) All of the mentioned View Answer Answer: c Explanation: A bar chart or bar graph is a chart that presents Grouped data with rectangular bars with lengths proportional to the values that they represent.

9. Which of the following information is not given by five-number summary? a) Mean b) Median c) Mode d) All of the mentioned View Answer Answer: c Explanation: The mode is the value that appears most often in a set of data.

10.Spinning plots can be used for two dimensional data. a) True b) False View Answer Answer: a Explanation: There are many ways to create a 3D spinning plot as well....