Learning Akka (Video 9)

Learning Akka (Video 9)

Assessment

Interactive Video

Information Technology (IT), Architecture

University

Hard

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FREE Resource

This video tutorial covers supervision and monitoring in Akka. It explains the parent-child relationship in supervision, detailing how a parent actor handles failures in its child actors through various strategies like resuming, restarting, stopping, or escalating failures. The video also contrasts supervision with monitoring, where an actor monitors another to react to its termination. Coding examples demonstrate these concepts, using actors Aphrodite, Hera, Aries, and Athena. The tutorial concludes with a summary of the section and a preview of upcoming topics, including router actors and stateful actors.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary role of a parent actor in Akka's supervision model?

To terminate all actors

To send messages to child actors

To handle failures of child actors

To create new actors

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT an option for a parent actor when a child actor fails?

Escalate the failure

Ignore the failure

Restart the child

Resume the child

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the 'one for one' supervision strategy, how does the parent actor respond to a child's failure?

Applies the chosen action only to the failed child

Ignores the failure

Applies the chosen action to all children

Escalates the failure to its own parent

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the default supervision strategy in Akka?

One for one

One for all

All for one

None for all

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does monitoring differ from supervision in Akka?

Monitoring reacts to actor termination

Monitoring handles actor failures

Monitoring reacts to actor creation

Monitoring sends messages to actors

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the provided coding example, what action does the Aries actor take upon receiving a termination signal from Athena?

Restarts Athena

Ignores the signal

Sends a message to Athena

Stops itself

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What lifecycle hook is implemented in the Aphrodite actor to understand its behavior during supervision?

All of the above

Pre-restart hook

Post-stop hook

Pre-start hook