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51.

Point out the correct statement.(a) HDF5 is a hierarchical format(b) HDF5 does not support range of different data types(c) HDF5 is used for storing small datasets(d) None of the mentionedI have been asked this question in an interview for job.My doubt is from Reading from Web and APIs topic in division Getting Data of Data Science

Answer»

Correct choice is (a) HDF5 is a HIERARCHICAL format

The EXPLANATION: HDF5 is used for STORING LARGE datasets.
Discussion
52.

Point out the correct statement.(a) Nearly 80% of data analysis is spent on wrangling data(b) Nearly 20% of data analysis is spent on data dredging(c) Nearly 80% of data analysis is spent on the cleaning and preparing data(d) None of the mentionedI have been asked this question in an online interview.I need to ask this question from Tidy Data topic in division Getting Data of Data Science

Answer»

The CORRECT option is (c) Nearly 80% of data analysis is spent on the cleaning and preparing data

To explain: Data cleansing is the process of DETECTING and correcting (or removing) corrupt or inaccurate RECORDS from a RECORD set, table, or DATABASE.
Discussion
53.

Which of the following is another name for raw data?(a) destination data(b) eggy data(c) secondary(d) machine learningThe question was asked in class test.My question is from Raw and Processed Data in division Getting Data of Data Science

Answer»

Right OPTION is (b) eggy data

For EXPLANATION: Although RAW data has the POTENTIAL to become “information,” extraction, organization, and sometimes analysis and FORMATTING for presentation are required for that to occur.
Discussion
54.

Which of the following package is used to connect MySQL RDBMS with R?(a) RMySQL vignette(b) MySQL vignette(c) RSQL vignette(d) None of the mentionedI had been asked this question in semester exam.My question is from Reading from Web and APIs in section Getting Data of Data Science

Answer»

The correct ANSWER is (a) RMySQL vignette

Easy explanation - This package contains META INFORMATION and INDEX.
Discussion