Deutsche Bank Mainframe Developer Interview Questions and Answers

Abend the program by moving error code to Return code

• To abend the program, set the return code to a non-zero value indicating an error

• This can be done using a conditional statement to check for errors and then setting the return code accordingly

• For example, in COBOL, you can use the ACCEPT statement to move the error code to the return code

Use the COND parameter in the JCL to prevent job abend when subscript limit is reached.

• Use COND parameter in JCL to check for subscript limit before executing subsequent steps

• Set COND parameter to check for specific return code when subscript limit is reached

• Add a condition to bypass subsequent steps if subscript limit is exceeded

To read a file with different record structures, use a combination of file parsing techniques and data manipulation.

• Identify the record structure of each section in the file

• Use conditional logic to parse each record based on its structure

• Implement error handling for unexpected record structures

• Utilize tools like regular expressions or custom parsing functions

• Consider using libraries or frameworks that support flexible file parsing

To increase performance of a COBOL program using multiple cursors, consider optimizing the SQL queries, reducing the number of cursors, and using efficient data structures.

• Optimize SQL queries to retrieve only necessary data

• Reduce the number of cursors by combining multiple queries into one

• Use efficient data structures like arrays or tables to store and manipulate data

• Avoid unnecessary looping and processing within cursor operations

To add the 10th additional record in a file using a Cobol program, you would need to read the file sequentially and write the new record at the appropriate position.

• Read the file sequentially until you reach the 9th record

• Write the 10th record at the current position in the file

• Update the file with the new record

Data from Cobol can be passed to JCL using file handling techniques like writing data to a dataset or passing parameters through PROCs.

• Use file handling techniques to write data from Cobol program to a dataset that can be accessed by JCL.

• Pass parameters from Cobol program to JCL using PROCs.

• Use symbolic parameters in JCL to reference data from Cobol programs.

To resolve division by zero error, check for zero before performing division operation.

• Check if the denominator is zero before performing division operation

• Handle the error by displaying a message or returning a default value

• Use conditional statements or try-catch blocks to prevent division by zero

To check if a file is empty, you can use file size or read the file and check for any content.

• Check the file size using system functions like stat() or file length property

• Read the file and check if there is any content present

• Use file handling functions to determine if the file is empty