Data Science & Ai Applications

40 Questions | By Event.isie30 | Last updated: Mar 21, 2022 | Total Attempts: 229

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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