Data Sciences Quiz

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Data Sciences

Data Sciences Quiz

1 / 25

Encapsulation is ___________:-

information hiding

member function

methods

2 / 25

Series is a one dimensional labeled array capable of holding any data type :-

True

False

3 / 25

Assignment and comparison ofpointer variables in C++ is based on the value of the :-

Class

Object

Pointer

4 / 25

Which function is used for loading flat files ;-

Read. data

Read . sheet

Read. table

5 / 25

Which allows you to find the relationship you didn't about ;-

Exploratory

Causal

Inferential

6 / 25

Major role of queue server in ;-

none of them

Simulation of heapsort

Simulation of arbitrary linked list

7 / 25

What are different machine learning methods ;-

Supervised learning

Reinforcements learning

Unsupervised learning

all of them

8 / 25

Which of the following of a random variable is a measure of spread :-

Standard deviation

Empirical mean

Variance

9 / 25

Which model sums the importance over each boosting iteration;-

Boosted trees

partial least squares

Bagged trees

10 / 25

Which parameter defines line type such as dashed and dotted ;-

lwd

pch

Ity

11 / 25

Which is used to declare the schema of our data either in a ____________ file ;-

JSON

SQL

12 / 25

Merging concerns combining datasets on the same observations to produce a result with more variables :-

False

True

13 / 25

The database access consist of various components called :-

Tools

Objects

Relationship

14 / 25

Data visualization helps users in analyzing a large amount of data in simpler way ;-

False

True

15 / 25

What is the use of data cleaning :-

all of them

Correct the incosistencies in data

to remove the noisy data

16 / 25

Data analysis is defined by the statistician ;-

Hans Peter Luhn

William S

John Tukey

17 / 25

The queue is a :-

FIFO

LIFO

LOFI

18 / 25

Which of the following analysis help out to find the effect of variable change ;-

Causal

Exploratory

Inferential

19 / 25

Which of the following inequality is useful for interpreting variance ;-

Chebyshev

Testory

Stautaory

20 / 25

In general , the merges and splits are determined in a greedy manner ;-

True

False

21 / 25

In DBMS model are classified into ;-

all of them

Physical data model

Object based logical model

22 / 25

A signal piece of information in the relational database is stored in ;-

Relationship

Entity

Field

23 / 25

Which is the main objectives of machine learning dimensionality reduction techniques :-

To increase the number if features in the data while preserving important information

To reduce the number if features in the data while preserving important information

To make data more complex

24 / 25

Which function can be helpful to flag predictors for removal ;-

search Correlation

None of them

Find Correlation

25 / 25

Total types of layer in radial basis function neural networks is ;-

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