Azure Data Science Certification

Question 1

What do Inbound Security Rules do?

Answer 1

Ensure only required communications from the internet are allowed.

Question 2

Batch Node Management

what is it?
what does it allow you to do?
what is the destination port #?

Answer 2

Type of service tag which is used to identify groups IP addresses. Service tags are groups IP addresses.

Allows you to define security rules without having to manually identify IP addresses.

The service tag requires a destination port of 29876 - 29877

Question 3

Secure Shell (SSH) Protocol

(what is the destination range?)

Answer 3

destination port range: 22

Question 4

Service Principal (SP)

definition & what is created during the creation process

Answer 4

Directory object (an alias for a physical directory path) that can be used for token-based authentication. As part of the creation process a client secret is generated which is comparable to a password.

Question 5

token-based authentication

Answer 5

Requires users to obtain a computer-generated code (or token) before they’re granted network entry.

Question 6

Apache Ambari

(used for)

Answer 6

Management of Hadoop Clusters

Question 7

Azure Log Analytics

(used for)

Answer 7

Querying Diagnostic Logs

Question 8

Azure Sentinel

(used for)

Answer 8

cloud security information event management (SIEM)

Question 9

Explainers

(definition & 2 examples)

Answer 9

Interpretable techniques used to explain how a machine learning model works.

TabularExplainer - used tabular datasets
LinearExplainer - explains linear models

Question 10

Image classification

(what is the primary metric?)
(does imply maximizing or minimizing this metric?)

Answer 10

1. accuracy metric (the proportion of instances that have been correctly classified)
2. it implies that you want to maximize the metric

Question 11

Spearman Correlation

Answer 11

calculates the monotonic relationship between two values

monotonic relationship
(1) as the value of one variable increases, so does the value of the other variable; or 

(2) as the value of one variable increases, the other variable value decreases.

Question 12

Azure Kubernetes Services (AKS)

(what type of compute instances does it support?)
(which deployment is it recommended for?)

Answer 12

1. GPU-based compute instances for deploying real-time inference models.
2. It is recommended for production deployment

Question 13

Azure Container Instances (ACI)

(what is it suited for? what are its limitations?)

Answer 13

• suited for testing /debugging workloads but does not support GPU-based instance configuration, only low-scale CPU-based workloads

Question 14

Which computer cluster should you use?

1. Batch Inference
2. Real Time
3. Testing & Debugging

Answer 14

1. Compute Cluster (cannot handle real-time data, because they utilize low priority VMs that may not scale to the load required)
2. Azure Kubernetes Service (AKS)
3. Computer Instance Web Service (testing and debugging are best done on low-cost cloud or local resources, per-hour cost associated with compute clusters and AKS make them poor candidates for testing and debugging)

Question 15

run.log_list()

Answer 15

method that provides a log list of values, arrays, dictionaries, vectors, or any non-scalar value

Question 16

run.log_image()

Answer 16

logs transformed PNG images to the run record, log matplotlib plots to the run record

Question 17

truncation selection policy

Answer 17

cancels a percentage of runs with low performance on the primary metric