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C1000-059 Sample Questions Answers

Questions 4

What is the primary role of a data steward?

Options:

A.

they are a "blue sky thinker" who comes up with new approaches to use new data in innovative ways

B.

they have a strong understanding of the enterprise's database architecture

C.

they define data processes to meet compliance and regulatory obligations

D.

the one who collects, processes, and performs statistical analysis on data

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Questions 5

What is the goal of the backpropagation algorithm?

Options:

A.

to randomize the trajectory of the neural network parameters during training

B.

to smooth the gradient of the loss function in order to avoid getting trapped in small local minimas

C.

to scale the gradient descent step in proportion to the gradient magnitude

D.

to compute the gradient of the loss function with respect to the neural network parameters

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Questions 6

A neural network is trained for a classification task. During training, you monitor the loss function for the train dataset and the validation dataset, along with the accuracy for the validation dataset. The goal is to get an accuracy of 95%.

From the graph, what modification would be appropriate to improve the performance of the model?

Options:

A.

increase the depth of the neural network

B.

insert a dropout layer in the neural network architecture

C.

increase the proportion of the train dataset by moving examples from the validation dataset to the train dataset

D.

restart the training with a higher learning rate

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Questions 7

What is meant by part-of-speech tagging in the context of text analytics?

Options:

A.

replaces words with synonyms, e g. answer for reply

B.

translates word by word

C.

finds the root word

D.

determines the category of a word, e.g nouns

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Questions 8

Which two statements are correct about deploying machine learning models? (Choose two.)

Options:

A.

It allows integration within business applications.

B.

It makes it possible to create reports for management dynamically using specific parameters from executives.

C.

It is critical for achieving high accuracy in training.

D.

It is a necessary step in training and evaluating the performance of the models.

E.

It is only possible on the cloud because they require a large amount of compute resources.

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Questions 9

Which one is the most appropriate use case for artificial intelligence (AI)?

Options:

A.

detecting objects in video streams

B.

compressing large video files

C.

aggregating sales revenue per state

D.

creating a pivot table with monthly costs

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Questions 10

What is used to scale large positive values during data cleaning?

Options:

A.

division by random numbers

B.

square

C.

logarithm

D.

subtract median

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Questions 11

Which statement defines p-value?

Options:

A.

It is the probability of accepting a null hypothesis when the hypothesis is proven true.

B.

It is the probability of rejecting a null hypothesis when the hypothesis is proven false.

C.

It is the probability of accepting a null hypothesis when the hypothesis is proven false.

D.

It is the probability of rejecting a null hypothesis when the hypothesis is proven true.

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Questions 12

Which two properties hold true for standardized variables (also known as z-score normalization)? (Choose two.)

Options:

A.

standard deviation = 0.5

B.

expected value = 0

C.

expected value = 0.5

D.

expected value = 1

E.

standard deviation = 1

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Questions 13

A classification task has examples that are labeled as belonging to one of two classes:

•90% of the examples belong to class-1

•10% belong to class-2

Which two techniques are appropriate to deal with the class imbalance? (Choose two.)

Options:

A.

apply dimensionality reduction to the features before training

B.

impose an additional cost on the model for making classification mistakes on the minority class during training

C.

lower the detection threshold of the minority class after training

D.

oversample the minority class and/or undersample the majority class

E.

after training, divide the model accuracy of each class by the proportion that they represent in the dataset

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Questions 14

A new test to diagnose a disease is evaluated on 1152 people, and 106 people have the disease, and 1046 people do not have the disease. The test results are summarized below:

In this sample, how many cases are false positives and false negatives?

Options:

A.

33 false positives and 81 false negatives

B.

81 false positives and 73 false negatives

C.

73 false positives and 81 false negatives

D.

81 false positives and 33 false negatives

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Questions 15

A neural network is composed of a first affine transformation (affine1) followed by a ReLU non-linearity, followed by a second affine transformation (affine2).

Which two explicit functions are implemented by this neural network? (Choose two.)

Options:

A.

y = affine1(ReLU(affine2(x)))

B.

y = max(affine1(x), affine2(x))

C.

y = affine2(ReLU(affine1(x)))

D.

y = affine2(max(affine1(x), 0))

E.

y = ReLU(affine1(x), affine2(x))

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Questions 16

Which test is applied to determine the relationship between two categorical variables?

Options:

A.

paired t-test

B.

chi squared test

C.

z test

D.

t-test

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Questions 17

What statement is true about UTF-8?

Options:

A.

It is encoding for Latin script.

B.

It is rarely used today.

C.

It is encoding for Unicode characters.

D.

It is equal to ASCII.

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Questions 18

Given the following matrix multiplication:

What is the value of P?

Options:

A.

–9

B.

17

C.

12

D.

–7

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Exam Code: C1000-059
Exam Name: IBM AI Enterprise Workflow V1 Data Science Specialist
Last Update: May 16, 2024
Questions: 62
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