Talend Developer Interview Questions and Answers

Approach to debug Talend job with 50% data loading to target out of 100 records from source

• Check the log files for any errors or warnings

• Verify the source and target connections

• Check if any filters or transformations are causing the issue

• Check if the job is designed for incremental load and if the correct parameters are set

• Check if there are any data quality issues in the source data

• Check if there are any network or system issues causing the job to fail

To pass variables from child to parent and vice versa, use context variables. For dynamic schema, use Talend's tSchemaDynamic component.

• Use context variables to pass variables between child and parent jobs

• For dynamic schema, use Talend's tSchemaDynamic component

• tSchemaDynamic allows for dynamic schema creation based on input data

• Use tFileInputDelimited component to read files with dynamic schema

To generate 10 mails for every successful loading of 10 files to target.

• Create a job that loads 10 files to target

• Add a component to generate mails after successful loading

• Configure the mail component to send 10 mails

• Use a loop to repeat the process for every 10 files loaded

tJoin is used to join two data streams based on a common key, while tMap is used to transform and manipulate data within a single data stream.

• tJoin is used to combine data from two input streams based on a common key field

• tMap is used to perform transformations, lookups, and calculations on data within a single input stream

• tJoin is typically used for joining data from different sources, while tMap is used for data manipulation within a single source

• Example: tJoin can be used ...read more

TAC stands for Talend Administration Center. Triggers in TAC are used to schedule and automate the execution of jobs.

• TAC is a web-based application used to manage, monitor, and administer Talend jobs and projects.

• Triggers in TAC allow users to schedule the execution of jobs at specific times or based on certain conditions.

• Triggers can be set to run jobs on a recurring basis, such as daily, weekly, or monthly.

• Users can also set triggers to run jobs based on events, such as the...read more

tMap is used for mapping and transforming data, while tJoin is used for joining data from multiple sources.

• tMap is used for mapping and transforming data between input and output schemas

• tJoin is used for joining data from multiple sources based on a common key

• tMap allows for complex transformations and calculations, while tJoin is primarily for joining data

Amazon Redshift is a fully managed, petabyte-scale data warehouse service in the cloud.

• Columnar storage: Redshift stores data in a columnar format, which improves query performance.

• Scalability: Easily scales from a few hundred gigabytes to petabytes of data.

• Integration: Works seamlessly with various ETL tools like Talend for data ingestion.

• Cost-effective: Offers a pay-as-you-go pricing model, making it affordable for businesses.

• Data compression: Redshift automatically compres...read more