Module-3 [Data Processing, Data Wrangling, Data Visualization]

Which is the best way to generate numbers ?

• srand()
  

• rand(100)

• rand()

• rand()%100

Point out the correct statement.

• Raw data is original source of data
  

• Pre-processed data is original source of data

• Raw data is the data obtained after processing steps

• None of the above

The matrix which is the sum of all the diagonal elements of a square matrix?

• Diagonal matrix
  

• Trace matrix

• Identity matrix

• Both A and B

 What Will be output of det(A)?

A=[30,31,40,41,50,51,60,61,70]

• 0.0004166667
  

• -0.0004166668

• 0.0004166668

• error

Which package is used for plotting a histogram?

• Plot

• VisualStat

• Plots

• DataVisualization

Write the output

A = [1];

B = [5,6,7,8];

broadcast(+, A, B)

• 1,5,6,7,8

• 6,7,8,9

• 5,6,1,7,8

• 1,6,7,8,9,

Write the proper way to check each element of array with some value

• ==

• *=

• .=

• .==

write the output

[1,2].-[1 2 3; 4 5 6]

• -1 0

  -2 -2

  -3 -4

• 0 -1

  2 2

  -3 -4

• 0 -1

  -2 -2

  -3 -4

• Error

What is the purpose of using seed function here?
Random.seed!(3) 
randstring()

• It will provide unique value every time

• It will fix the value in many iterations

• It will fix the length of generating string

• It is not affecting the code

How we can fix the bit size of randomly generated number?

• rand(10)

• rand(Int32,10)

• rand(10,Int16)

• rand()