Data Science & Ai Applications
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- 1.Point out the correct statement.
- A.
Raw data is original source of data
- B.
Preprocessed data is original source of data
- C.
Raw data is the data obtained after processing steps
- D.
None of the mentioned
- 2.Data that summarize all observations in a category are called __________ data.
- A.
Frequency
- B.
Summarized
- C.
raw
- D.
None of the mentioned
- 3.Which of the following is an example of raw data?
- A.
Original swath files generated from a sonar system
- B.
Initial time-series file of temperature values
- C.
A real-time GPS-encoded navigation file
- D.
All of the mentioned
- 4.Point out the correct statement.
- A.
Primary data is original source of data
- B.
Secondary data is original source of data
- C.
Questions are obtained after data processing steps
- D.
None of the Mentioned
- 5.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
- 6.Which of the following is another name for raw data?
- A.
destination data
- B.
eggy data
- C.
secondary
- D.
machine learning
- 7.Which type of data is generated by POS terminal in a busy supermarket each day?
- A.
Source
- B.
Processed
- C.
Synchronized
- D.
All of the mentioned
- 8.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 mentioned
- 9.Which of the following package is used for tidy data?
- A.
tidyr
- B.
souryr
- C.
NumPy
- D.
None
- 10.Which of the following process involves structuring datasets to facilitate analysis?
- A.
Data tidying
- B.
Data mining
- C.
Data booting
- D.
none
- 11.Raw data in the real-world is tidy and properly formatted.
- A.
True
- B.
False
- 12.Which of the following function is used for loading flat files?
- A.
read.data
- B.
Read.sheet
- C.
read.table
- D.
None of the mentioned
- 13.Which of the following is an important parameter of read.table function?
- A.
file
- B.
Header
- C.
Sep
- D.
all of the mentioned
- 14.Which of the following will set the character that represents missing value?
- A.
Na.quote
- B.
na.strings
- C.
nrows
- D.
All of the mentioned
- 15.Which of the following package is used for reading excel data?
- A.
Xlsx
- B.
xlsc
- C.
Read.sheet
- D.
all of the mentioned
- 16.Which of the following can be used to view all the tables in memory?
- A.
Tables
- B.
alltable
- C.
Table
- D.
None
- 17.Which of the following is used to extract data from HTML code of websites?
- A.
Webscraping
- B.
Webdredging
- C.
Webcleaning
- D.
All of the mentioned
- 18.Which of the following function is used to read data off the webpages?
- A.
read.web
- B.
Read.Lines
- C.
read.Line
- D.
all of the mentioned
- 19.Which of the following function gives information about top level data?
- A.
Head
- B.
tail
- C.
Summary
- D.
None of the mention
- 20.Point out the correct statement.
- A.
head function work on string
- B.
tail function work on string
- C.
Head function work on string but tail function do not
- D.
none of the mentioned
- 21.Which of the following function is used for quantiles of quantitative values?
- A.
quantile
- B.
quantity
- C.
quantiles
- D.
all of the mentioned
- 22.Who is a data scientist?
- A.
Software Programmer
- B.
Statistician
- C.
Mathematician
- D.
All of the mentioned
- 23.Which of the following function is used for casting data frames?
- A.
Dcast
- B.
Ucast
- C.
Rcast
- D.
all of the mentioned
- 24.Mutate function is used for casting as multi dimensional arrays.
- A.
TRUE
- B.
FALSE.
- 25.How do you check if “m” is a matrix data object in R?
- A.
As.matrix()
- B.
M.matrix()
- C.
And.matrix()
- D.
None
Questions: 7 | Attempts: 540 | Last updated: Dec 14, 2012
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