Data Science Mock Test 6 - Online MCQ Exam

If b is a dictionary, what does any(b) do?

1 Mark(s)

Your Answer:

Returns True if any key of the dictionary is true
Returns False if dictionary is empty Returns False if dictionary is empty
Returns True if all keys of the dictionary are true
Method any() doesn't exist for dictionary

Life of a T.V picture tube is a____________?

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Your Answer:

Discrete variable Discrete variable
Continuous variable Continuous variable
Qualitative variable Qualitative variable
Constant Constant

Behaviors in the real world are equivalent to program's:

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Your Answer:

data data
function function
module module
loop loop

What will be the output of the following Python code? print("xyyzxyzxzxyy".endswith("xyy"))

1 Mark(s)

Your Answer:

1 1
True True
3 3
2 2

In data ethics and privacy, what is the primary purpose of "data minimization"?

1 Mark(s)

Your Answer:

To collect as much data as possible To collect as much data as possible
To collect only necessary data To collect only necessary data
To collect data secretly To collect data secretly
To delete all collected data To delete all collected data

What is the primary purpose of "data exploration" in data visualization?

1 Mark(s)

Your Answer:

Discover insights in the data Discover insights in the data
Add decorative elements Add decorative elements
Make charts more complex Make charts more complex
Slow down data analysis Slow down data analysis

What function do you use to read a string?

1 Mark(s)

Your Answer:

input("Enter a string") input("Enter a string")
eval(input("Enter a string")) eval(input("Enter a string"))
enter("Enter a string") enter("Enter a string")
eval(enter("Enter a string")) eval(enter("Enter a string"))

What is the primary purpose of the "problem statement" in a data science capstone project?

1 Mark(s)

Your Answer:

Provide a literature review Provide a literature review
Define the project scope Define the project scope
Choose the programming language Choose the programming language
None of the above None of the above

What will be the output of the following Python code snippet? a = {} a[1] = 1 a['1'] = 2 a[1.0]=4 count = 0 for i in a: count += a[i] print(count)

1 Mark(s)

Your Answer:

An exception is thrown An exception is thrown
3 3
6 6
2 2

What is the primary data structure in Numpy used for storing and performing operations on numerical data?

1 Mark(s)

Your Answer:

Tensor Tensor
Series Series
DataFrame DataFrame
ndarray ndarray

What will be the output of the following Python code? x = ['ab', 'cd'] for i in x: x.append(i.upper()) print(x)

1 Mark(s)

Your Answer:

['AB', 'CD'] ['AB', 'CD']
['ab', 'cd', 'AB', 'CD'] ['ab', 'cd', 'AB', 'CD']
['ab', 'cd'] ['ab', 'cd']
none of the mentioned none of the mentioned

Which technology is commonly used for streamlining the data velocity aspect of big data, allowing for real-time data collection and analysis?

1 Mark(s)

Your Answer:

Data lakes Data lakes
Data warehouses Data warehouses
Internet of Things (IoT) Internet of Things (IoT)
Apache Kafka Apache Kafka

What is the primary goal of dimensionality reduction techniques like Principal Component Analysis (PCA) in machine learning?

1 Mark(s)

Your Answer:

To increase model interpretability To increase model interpretability
To reduce the size of the training dataset
To perform unsupervised learning To perform unsupervised learning
To visualize data relationships To visualize data relationships

In the context of NLP, what does the acronym "NER" stand for?

1 Mark(s)

Your Answer:

Natural Entity Recognition Natural Entity Recognition
Named Entity Recognition Named Entity Recognition
Normalized Entity Recognition Normalized Entity Recognition
Named Entity Resampling Named Entity Resampling

In Pandas, which method is used to fill missing values in a DataFrame with specified values or a filling method?

1 Mark(s)

Your Answer:

melt() melt()
drop_duplicates() drop_duplicates()
dropna() dropna()
fillna() fillna()

Which module is commonly used for database connectivity in Python?

1 Mark(s)

Your Answer:

dbconnect dbconnect
pydb pydb
sqlite3 sqlite3
dbconnector dbconnector

A box containing 12 balls of color 6 red and 6 white. A ball of white selected ball finds the probability of white____________?

1 Mark(s)

Your Answer:

7/12 7/12
6/12 6/12
12/12 12/12
4/12 4/12

What is the primary concern addressed by HIPAA (Health Insurance Portability and Accountability Act) in data privacy?

1 Mark(s)

Your Answer:

Protecting data from cyberattacks Protecting data from cyberattacks
Safeguarding healthcare information Safeguarding healthcare information
Ensuring data accuracy Ensuring data accuracy
Regulating data usage Regulating data usage

Random numbers are used for selection of ____________?

1 Mark(s)

Your Answer:

Random space Random space
Space Space
Random sample Random sample
Non of these Non of these

What is the purpose of using the yield from statement in generators?

1 Mark(s)

Your Answer:

To yield values directly To yield values directly
To yield values from another generator To yield values from another generator
To stop the generator To stop the generator
To skip a value To skip a value

Accurate prediction depends heavily on measuring the right variables.

1 Mark(s)

Your Answer:

True True
False False

What is the term for the process of handling missing data in a dataset by estimating values based on available data?

1 Mark(s)

Your Answer:

Data Imputation Data Imputation
Data Normalization Data Normalization
Data Transformation Data Transformation
Data Encoding Data Encoding

What is the output of the following code: my_tuple = (1, 2, 3) print(my_tuple[1])

1 Mark(s)

Your Answer:

1 1
2 2
3 3
Error Error

What does "SQL" stand for in the context of data science?

1 Mark(s)

Your Answer:

Structured Query Language Structured Query Language
Statistical Query Language Statistical Query Language
Scripting Query Language Scripting Query Language
Scientific Query Language Scientific Query Language

Class which share its characteristics to parent class but also add its own is termed as:

1 Mark(s)

Your Answer:

base class base class
derived class derived class
sub class sub class
object object

What is the purpose of "lemmatization" in NLP?

1 Mark(s)

Your Answer:

To group words into topics To group words into topics
To split text into individual words or tokens
To reduce words to their base or dictionary form
To recognize named entities To recognize named entities

Which of the following precedence order is correct in Python?

1 Mark(s)

Your Answer:

Parentheses, Exponential, Multiplication, Division, Addition, Subtraction
Multiplication, Division, Addition, Subtraction, Parentheses, Exponential
Division, Multiplication, Addition, Subtraction, Parentheses, Exponential
Exponential, Parentheses, Multiplication, Division, Addition, Subtraction

What is the primary goal of "cross-correlation analysis" in time series analysis?

1 Mark(s)

Your Answer:

To identify seasonality in the data To identify seasonality in the data
To test for causality between time series data
To remove outliers from the data To remove outliers from the data
To determine the order of differencing To determine the order of differencing

In machine learning, what does the term "bias" refer to when evaluating a model's performance?

1 Mark(s)

Your Answer:

The model's flexibility The model's flexibility
The difference between predicted and actual values
The model's ability to generalize The model's ability to generalize
The model's ability to fit the training data

In data collection, what is the term for data that has not been processed or analyzed and is in its original form?

1 Mark(s)

Your Answer:

Raw Data Raw Data
Processed Data Processed Data
Analytical Data Analytical Data
Structured Data Structured Data

What is the value of the following Python expression? bin(0x8)

1 Mark(s)

Your Answer:

'0bx1000' '0bx1000'
8 8
1000 1000
'0b1000' '0b1000'

In a data science capstone project, what does "feature engineering" involve?

1 Mark(s)

Your Answer:

Writing the final report Writing the final report
Selecting the mentor Selecting the mentor
Visualizing data distributions Visualizing data distributions
Creating new data variables Creating new data variables

Which symbol is used to denote a decorator in Python syntax?

1 Mark(s)

Your Answer:

@ @
# #
& &
* *

In a data science capstone project, what is the role of "data validation" and "data cleaning"?

1 Mark(s)

Your Answer:

Replace the mentor Replace the mentor
Write the project report Write the project report
Enhance the project's complexity Enhance the project's complexity
Ensure data accuracy Ensure data accuracy

What is the output of the function complex()?

1 Mark(s)

Your Answer:

0j 0j
0+0j 0+0j
0 0
Error Error

What will be the output of the following Python expression if x=456? print("%-06d"%x)

1 Mark(s)

Your Answer:

000456 000456
456000 456000
456 456
error error

In data preprocessing, what is the term for the process of converting categorical data into binary format?

1 Mark(s)

Your Answer:

Data Encoding Data Encoding
Data Normalization Data Normalization
Data Imputation Data Imputation
Data Aggregation Data Aggregation

Which emerging trend in data science focuses on using AI to automate and improve the efficiency of legal research and document analysis?

1 Mark(s)

Your Answer:

Predictive maintenance Predictive maintenance
Logistics optimization Logistics optimization
LegalTech LegalTech
Mental health AI Mental health AI

The Normal Curve is asymptotic to the?

1 Mark(s)

Your Answer:

None None
X-axis X-axis
Y-axis Y-axis
Along Y=X Along Y=X

Data being used by an agency which is originally collected by them are _______ data?

1 Mark(s)

Your Answer:

Quantitative Quantitative
Primary Primary
Discrete Discrete
Secondary Secondary

What is the output of the following code snippet: for i in range(2, 6): print(i)

1 Mark(s)

Your Answer:

2 3 4 5 2 3 4 5
1 3 4 6 1 3 4 6
3 4 5 6 3 4 5 6
1 2 3 4 1 2 3 4

What is the primary purpose of the "rolling" method in Pandas when working with time series data?

1 Mark(s)

Your Answer:

Sorting data Sorting data
Calculate rolling statistics Calculate rolling statistics
Filtering data Filtering data
None of the above None of the above

Standard deviation is always calculated from _____________?

1 Mark(s)

Your Answer:

Mean Mean
Median Median
Mode Mode
G.M. G.M.

If X predicts Y, it does mean X causes Y.

1 Mark(s)

Your Answer:

True True
False False

Which emerging trend in data science is related to the use of AI-driven chatbots and virtual assistants for customer support?

1 Mark(s)

Your Answer:

Internet of Things (IoT) Internet of Things (IoT)
Data engineering Data engineering
Conversational AI Conversational AI
Quantum computing Quantum computing

When data are collected in a statistical study for only a portion or subset of all elements of interest we are using?

1 Mark(s)

Your Answer:

A sample A sample
A Parameter A Parameter
A Population A Population
Both b and c Both b and c

Which technology involves the use of AI and data analytics to enhance the efficiency and safety of manufacturing processes?

1 Mark(s)

Your Answer:

EdTech EdTech
Smart manufacturing Smart manufacturing
Content personalization Content personalization
None of the above None of the above

Which of the following function can be used to flag predictors for removal?

1 Mark(s)

Your Answer:

searchCorrelation searchCorrelation
findCausation findCausation
findCorrelation findCorrelation
none of the mentioned none of the mentioned

What is the output of the code: print("{:<10}".format("hello"))?

1 Mark(s)

Your Answer:

"hello" "hello"
"hello " "hello "
"hell" "hell"
"hello " "hello "

Population census is conducted through_______________?

1 Mark(s)

Your Answer:

Sample survey Sample survey
Accounting Accounting
Investigation Investigation
Complete enumeration Complete enumeration

The time taken by an athlete to run a 400 mile race in SAF games ________________?

1 Mark(s)

Your Answer:

Continuous data Continuous data
Random Random
Discrete data Discrete data
Non of these Non of these

What will be the output of the following code: my_list = [1, 2, 3] my_list.reverse() print(my_list)

1 Mark(s)

Your Answer:

[1, 2, 3] [1, 2, 3]
[3, 2, 1] [3, 2, 1]
[2, 3, 1] [2, 3, 1]
[1, 3, 2] [1, 3, 2]

_____________is used to compare the variation or dispersion in two or more sets of data even though they are measured in different units?

1 Mark(s)

Your Answer:

Range Range
Standard Deviation Standard Deviation
Coefficient of Variation Coefficient of Variation
Mean Deviation Mean Deviation

If the sampled population has a normal distribution, when is the sampling distribution of the sample mean X also a normal distribution ?

1 Mark(s)

Your Answer:

Only when the sample size is at least 100.
Only when the sample size is smaller than 30
Always Always
Only when the sample size is at least 30.

Which sampling technique is appropriate when there is homogeneity in population?

1 Mark(s)

Your Answer:

Simple random sampling Simple random sampling
Stratified sampling Stratified sampling
Cluster sampling Cluster sampling
Systematic sampling Systematic sampling

What is the main goal of object-oriented programming (OOP)?

1 Mark(s)

Your Answer:

To model real-world entities and their interactions
To maximize efficiency To maximize efficiency
To use fewer lines of code To use fewer lines of code
To create simple programs To create simple programs

In a binomial distribution the probability of ___________ changes from trial to trial?

1 Mark(s)

Your Answer:

Failure Failure
Experiment Experiment
Success Success
Out come Out come

What is the primary purpose of a confusion matrix in model evaluation?

1 Mark(s)

Your Answer:

To compare different machine learning algorithms
To visualize the model's decision boundary
To measure the model's prediction accuracy
To evaluate the performance of a classification model

In CPI household budget method also known as:_____________?

1 Mark(s)

Your Answer:

Simple average of relatives Simple average of relatives
Average of weights Average of weights
Weighted average of relatives Weighted average of relatives
All of above All of above

Evaluating Your Answers

Data Science Mock Test 6 : Question 1 of 59