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Mobile app development

Data Engineer

Mobile app development questions

9 questions on Mobile app development for data engineers, easiest first.

Easy 2

Default persistent state storeeasy
What keyBy does in Flinkeasy

Medium 6

Restoring state after a crashmedium
Reading live counts from a stream appmedium
State that grows without limitmedium
State larger than memorymedium
Sending rules to every instancemedium
Removing duplicate clicks in a streammedium

Hard 1

Failover takes twenty minuteshard

More Data Engineer skills

Airflow and orchestration 169 Kafka and stream processing 155 Data warehousing and dbt 145 Apache Spark 134 Data pipelines and data quality 132 Data modelling 113 SQL 54 Performance and debugging 28 Dimensional Modelling 28 Spark SQL 23 Consumers 19 Flink 16 Indexing and query tuning 15 Spark Streaming 15 Pyspark 15 Spark Tuning 15 Cloud platforms (AWS, Azure, GCP) 14 Airflow Templating 14 High availability and disaster recovery 14 Kafka Streams 14 Print production and colour 13 Operations 12 Airflow Scheduling 11 Producers 11

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