Elasticsearch 7 and Elastic Stack - In Depth and Hands On! - Nested Aggregations - Part 1

Elasticsearch 7 and Elastic Stack - In Depth and Hands On! - Nested Aggregations - Part 1

Assessment

Interactive Video

Information Technology (IT), Architecture, Performing Arts

University

Hard

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The video tutorial explains how to use nested aggregation to compute the average rating for each Star Wars movie in a database. It involves setting up a query to find movies with 'Star Wars' in the title, aggregating ratings by movie title, and calculating the average rating. The tutorial includes an activity to explore common issues with text field aggregation and provides a detailed explanation of the query structure and execution.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main purpose of using nested aggregations in the context of the Star Wars movie ratings example?

To eliminate duplicate entries

To increase the number of data points

To compute average ratings for each movie

To simplify the data structure

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in the query process to find Star Wars movies?

Sort by box office earnings

Filter by release year

Match the phrase 'Star Wars' in the title

Aggregate by movie genre

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a potential issue when aggregating on text fields?

Data loss

Inability to sort data

Increased processing time

Unexpected results due to text field nuances

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to use tabs and proper formatting when constructing a complex query?

To reduce the size of the query

To make the query run faster

To ensure the query is syntactically correct

To improve readability and understand nesting

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of the 'titles' aggregation in the query?

To sort movies by their release date

To filter out non-Star Wars movies

To group ratings by individual movie titles

To calculate the total number of ratings

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it necessary to understand the difference between the ratings index and the movies index?

To speed up the query execution

To ensure all movies are included

To reduce the complexity of the query

To avoid aggregating incorrect data

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final step in the nested aggregation process for Star Wars movies?

Calculate the total number of ratings

Compute the average rating for each title

Sort the movies by their average rating

Filter out movies with low ratings