[Solved] What is the main difference between a Scan and a Query operation in AWS DynamoDB? — Ans: Query retrieves items based on primary key; Scan reads the entire table | AWS

AWS - DynamoDB

What is the main difference between a Scan and a Query operation in AWS DynamoDB?

ABoth Scan and Query read the entire table but differ in speed

BScan retrieves items based on primary key; Query reads the entire table

CQuery retrieves items based on primary key; Scan reads the entire table

DQuery and Scan are identical in performance and usage

Step-by-Step Solution

Solution:

Step 1: Understand Query operation
Query uses the primary key to find specific items efficiently without reading the whole table.
Step 2: Understand Scan operation
Scan reads every item in the table, which is slower and less efficient for large tables.
Final Answer:
Query retrieves items based on primary key; Scan reads the entire table -> Option C
Quick Check:
Scan vs Query difference = Query uses keys, Scan reads all [OK]

Quick Trick: Query uses keys; Scan reads all items [OK]

Common Mistakes:

MISTAKES

Master "DynamoDB" in AWS

9 interactive learning modes - each teaches the same concept differently

More AWS Quizzes

What is the main difference between a Scan and a Query operation in AWS DynamoDB?