10+ Rex Sealing And Packing Industries Interview Questions and Answers

Unix related questions for Senior Software Engineer interview

• A hard link is a direct link to the physical file on disk, while a symbolic link is a reference to the file by name.

• To find out the system's IP address in Unix, you can use commands like ifconfig or ip addr show.

• The chmod command in Unix is used to change the permissions of a file or directory.

• grep is used for searching text using regular expressions, while egrep is an extended version of grep with more powerful pat...read more

To convert a CSV file to an Apache file and load it to an S3 bucket, use Apache NiFi for data transformation and AWS SDK for S3 upload.

• Use Apache NiFi to read the CSV file, transform it into Apache format, and write it to a local directory.

• Configure an Apache NiFi processor to upload the transformed file to an S3 bucket using AWS SDK.

• Set up appropriate permissions and credentials for the S3 bucket access.

• Monitor the Apache NiFi flow for successful file conversion and upload t...read more

Passing a runtime parameter from one Graph task to another within a Plan with different timings.

• Use Plan variables to store the runtime parameter in Graph task 1

• Set up a trigger in Graph task 2 to read the parameter from the Plan variables

• Ensure that the timings of the Graph tasks are properly synchronized

To find out the system's IP address in Unix, you can use the 'ifconfig' command or the 'ip addr show' command.

• Use the 'ifconfig' command to display the IP address of all network interfaces on the system.

• Alternatively, you can use the 'ip addr show' command to show the IP address information of all network interfaces.

• You can also use tools like 'hostname -I' or 'ip route get 1.2.3.4' to find out the system's IP address.

INNER JOIN returns only the rows that have matching values in both tables, while LEFT JOIN returns all rows from the left table and the matched rows from the right table.

• INNER JOIN is used to retrieve rows from both tables that have matching values based on the specified condition.

• LEFT JOIN is used to retrieve all rows from the left table, along with the matched rows from the right table. If there is no match, NULL values are returned for the right table columns.

• Example: If w...read more

Indexes in SQL are data structures that improve the speed of data retrieval operations by allowing quick access to specific rows in a table.

• Indexes are used to quickly locate rows in a table without having to search the entire table.

• They are important because they can significantly improve the performance of SELECT queries by reducing the time taken to retrieve data.

• Indexes can be created on one or more columns in a table to speed up search operations.

• Examples of indexes incl...read more

Yes, I am aware of Spark and have experience working with it.

• I have used Spark for processing large datasets in distributed computing environments.

• I am familiar with Spark's core concepts such as Resilient Distributed Datasets (RDDs) and transformations/actions.

• I have experience writing Spark applications using languages like Scala or Python.

• I have worked with Spark SQL for querying structured data and Spark Streaming for real-time data processing.

Watcher is used to monitor changes in variables during runtime, while breakpoint is used to pause program execution at a specific line of code.

• Watcher is used to track the value of a variable or expression during program execution.

• Breakpoint is used to pause the program at a specific line of code to allow for debugging.

• Watchers are typically set up in debugging tools like IDEs, while breakpoints are set by the developer in the code itself.

• Example: Setting a watcher on a varia...read more

I have worked on various components in Abinitio including GDE, Co>Operating System, Conduct>It, and EME.

• Graphical Development Environment (GDE)

• Co>Operating System (Co>OS)

• Conduct>It

• Enterprise Metadata Environment (EME)