Crucial Exams

AWS Certified Developer Associate DVA-C02 Practice Question

A Node.js game backend stores player data in an Amazon DynamoDB table named Players, where PlayerID is the partition key. After each session the service must update only the Score attribute for a given player. Which AWS SDK for JavaScript (v2 DocumentClient) code snippet accomplishes this with a single request and without changing other attributes?

  • docClient.update({TableName: 'Players', Key: , UpdateExpression: 'ADD Score :inc', ExpressionAttributeValues: {':inc': scoreIncrement}})

  • docClient.put({TableName: 'Players', Item: {PlayerID: playerId, Score: newScore}})

  • docClient.update({TableName: 'Players', Key: , UpdateExpression: 'SET Score = :newScore', ExpressionAttributeValues: {':newScore': newScore}})

  • docClient.get({TableName: 'Players', Key: }, function(err, data) { if (!err) { data.Item.Score = newScore; docClient.put({TableName: 'Players', Item: data.Item}); }})

AWS Certified Developer Associate DVA-C02
Development with AWS Services
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