Can you use the REDEFINES clause to redefine a group data item in COBOL?
- No, REDEFINES can only be applied to elementary items
- No, group data items cannot be redefined in COBOL
- Yes, but only if the group data item has a subordinate item
- Yes, it allows a group data item to be redefined by another group or elementary item
In COBOL, the REDEFINES clause can be used to redefine a group data item. It allows a group data item to share the same storage space with another group or elementary item, providing flexibility in data structure representation.
The "AT END" clause is often used in conjunction with the "NOT ON EXCEPTION" clause to handle errors that occur at the _____ of file processing.
- Beginning
- End
- Middle
- Start
The "AT END" clause in COBOL is used in conjunction with the "NOT ON EXCEPTION" clause to handle errors that occur at the end of file processing. This is useful for performing cleanup or finalization tasks before the program concludes.
To handle file errors gracefully in COBOL, you can use the _____ clause to specify the procedure to be executed when an exception occurs.
- EXCEPTION HANDLING
- EXCEPTION PROCEDURE
- FILE STATUS
- ON EXCEPTION
In COBOL, the "ON EXCEPTION" clause is used to specify the procedure to be executed when an exception occurs during file operations. It allows for effective handling of errors and ensures the program can respond appropriately to unexpected situations.
_____ variables in COBOL are those whose values are shared among all instances of a program.
- Common
- External
- Global
- Universal
Common variables in COBOL are those whose values are shared among all instances of a program. These variables are declared in a common area and can be accessed by multiple program modules.
When using a PERFORM loop in COBOL, what is the significance of the THRU clause?
- It defines the exit condition for the loop
- It indicates the continuation of a nested loop
- It is used to terminate the loop prematurely
- It specifies the range of paragraphs or sections to be repeated
The THRU clause in a PERFORM statement in COBOL is used to specify a range of paragraphs or sections to be repeated within the loop. It simplifies the code by avoiding the need to list each paragraph individually.
COBOL, what is "ON EXCEPTION UNDO" used for in error handling?
- To display an error message to the user
- To ignore exceptions and proceed with the program execution
- To roll back changes made to the file in case of an exception
- To terminate the program when an exception occurs
"ON EXCEPTION UNDO" in COBOL is used to roll back changes made to the file in case of an exception. It ensures data consistency by undoing any modifications made before the exception occurred.
In a COBOL program, when using a PERFORM loop with the VARYING clause, what is the role of the INDEX variable?
- It is not applicable to PERFORM loops with the VARYING clause
- It is used to control the loop execution by specifying the increment value
- It represents the total number of iterations in the loop
- It serves as a loop counter, indicating the current iteration
The INDEX variable in a PERFORM loop with the VARYING clause is crucial as it acts as a loop counter, keeping track of the current iteration. Program logic can be based on the value of the INDEX variable within the loop.
When using a PERFORM loop with the VARYING clause, the _______ clause defines the initial and final values for the loop control variable.
- BY
- FROM
- THRU
- TO
The VARYING clause in a COBOL PERFORM loop is used along with the FROM and TO keywords to specify the initial and final values for the loop control variable, determining the range of iteration.
When handling exceptions in COBOL programs, the "HANDLE EXCEPTION" phrase allows you to define custom _____ routines.
- Error reporting
- Exception handling
- Logging
- Recovery
The "HANDLE EXCEPTION" phrase in COBOL enables the programmer to define custom recovery routines that specify the actions to be taken when a specific exception is encountered. This facilitates customized exception handling and program recovery strategies.
When using the ADD statement in COBOL, the result is stored in the ________.
- LINKAGE SECTION
- WORKING-STORAGE
- accumulator
- identifier
When using the ADD statement in COBOL, the result is stored in the specified identifier. This identifier can be a data item, a literal, or a combination of both. It is essential for capturing the outcome of the addition operation.