TDID Free Sample Questions

A financial services firm is migrating a large dataset from an on-premises Oracle database to a cloud-based Snowflake data warehouse. The Talend job responsible for the migration is experiencing severe performance degradation. Analysis reveals that a `tMap` component, which performs a lookup against a 50-million-row dimension table in Snowflake, is the primary bottleneck. The job is running on a JobServer with 16GB of RAM. Which `tMap` configuration change is the MOST effective first step to mitigate this performance issue?

A developer needs to create a master orchestration Job that executes three child Jobs (JobA, JobB, JobC) sequentially. JobB should only execute if JobA completes successfully. JobC must execute regardless of the outcome of JobB, but only after JobB has finished (either successfully or with an error). Which combination of triggers correctly implements this logic?

A development team is building a series of Talend jobs that connect to different database environments (Dev, QA, Prod). To manage database credentials securely and efficiently, they decide to use context groups. A context variable `db_password` is created with the 'Password' type. In which of the following scenarios will the value of `db_password` be visible as plain text?

A developer is building a reusable data validation framework using a Joblet. The Joblet needs to accept an input data flow, apply a set of validation rules, and then route valid records to one output and invalid records to another. Which components are essential to correctly configure inside the Joblet to achieve this functionality? (Select THREE)

True or False: The `tFlowToIterate` component transforms each row of a main data flow into a global variable that can be used in a subsequent subjob, effectively converting a data flow into an iterative loop.

**Case Study:** A retail company, StyleSphere, needs to build a daily job to process sales data. The job must first download a ZIP file from an FTP server. This ZIP file contains three CSV files: `products.csv`, `sales.csv`, and `stores.csv`. After unzipping, the job must load the data from all three files into corresponding tables in a PostgreSQL database. The entire process must be transactional; if loading any of the three files fails, all changes made to the database during that run must be rolled back. The development team has decided to use a parent job for orchestration. This parent job will handle the FTP download, unzipping, and database connection management. It will then call a child job to perform the actual loading of the three files. **Requirements:** 1. The database connection must be opened once in the parent job and shared with the child job. 2. The final database commit should only happen in the parent job after the child job completes successfully. 3. If the child job fails, the parent job must execute a database rollback. Which design pattern correctly fulfills all these requirements?

A developer uses a `tUnite` component to merge data from three different source files that have identical schemas. However, during execution, the job fails with a schema mismatch error. What is the most likely cause of this error?

When building a Talend job, a developer needs to define the structure of a data source once and reuse it across multiple components and jobs. Which Talend feature is designed for this purpose?

A Talend job processes customer data and needs to perform different actions based on the customer's country. The logic should be: if the country is 'USA', load to a specific target; if the country is 'CAN', load to another target; for all other countries, log the record and discard. What is the most efficient way to implement this routing logic in a single component?

A developer needs to pass a value, specifically a record count calculated in a child job, back to its parent job for logging purposes. Which combination of components and settings is the standard method to achieve this?