When using the REDEFINES clause in COBOL, you can create a different view of the same ________ item.
- Group
- Level
- Memory
- Occurs
The REDEFINES clause in COBOL allows you to create a different view of the same memory space occupied by a group item. It is used for reinterpreting the storage allocated to a data item, providing flexibility in data representation.
In COBOL, what is an embedded SQL statement used for in the context of database connectivity?
- Connecting COBOL programs to multiple databases
- Creating backup copies of COBOL programs
- Executing SQL statements within COBOL programs
- Generating reports from COBOL programs
An embedded SQL statement in COBOL allows the execution of SQL queries, updates, and other database operations directly within COBOL programs. This integration facilitates database connectivity and enables COBOL programs to interact with database systems seamlessly.
When working with indexed files, how can you prevent the insertion of duplicate keys?
- Use the ADD verb before inserting a new record
- Specify the UNIQUE option in the FILE-CONTROL paragraph
- Include a CHECK verb to validate key uniqueness
- Utilize the OCCURS clause for key fields
To prevent the insertion of duplicate keys in COBOL indexed files, the UNIQUE option should be specified in the FILE-CONTROL paragraph of the program's data division. This ensures that each key value is unique within the indexed file.
The _____ clause in COBOL specifies the maximum number of records that can be in a relative file.
- LIMIT
- MAXIMUM
- OCCURS
- SIZE
In COBOL, the SIZE clause is used to specify the maximum number of records that can be present in a relative file. It helps in managing the size and capacity of the file for optimal performance.
In COBOL, what is the primary purpose of using VSAM and ISAM files?
- To enhance portability of COBOL programs
- To facilitate easy indexing of records
- To provide direct access to records based on key values
- To store only sequential data efficiently
The primary purpose of using VSAM (Virtual Storage Access Method) and ISAM (Indexed Sequential Access Method) files in COBOL is to provide direct access to records based on key values. This enables efficient retrieval and manipulation of specific records in a file.
The _____ clause in COBOL allows you to specify an alternative action to be taken when a file operation results in an exception.
- ALTERNATE RECORD
- EXCEPTION HANDLING
- EXCEPTION PROCEDURE
- INVALID KEY
In COBOL, the "INVALID KEY" clause is used to specify an alternative action to be taken when a file operation results in an exception. It provides a way to handle errors and take appropriate measures to ensure smooth program execution.
When using the MERGE statement, both input files must be _____ in ascending or descending order based on the merge criteria.
- INDEXED
- RANDOM
- SEQUENTIAL
- SORTED
When using the MERGE statement in COBOL, it is essential that both input files are sorted either in ascending or descending order based on the merge criteria. This ensures the effectiveness of the merging process.
In error handling, what does the "CONTINUE" statement typically signify?
- No specific action is taken, and the program continues with the next statement
- The error is logged to a file
- The program rolls back to the previous checkpoint
- The program terminates immediately
In error handling, the "CONTINUE" statement in COBOL signifies that no specific action is taken, and the program continues with the next statement in the normal flow, allowing for graceful handling of errors without disrupting the program execution.
In COBOL, how can you pass data between a calling program and a called subprogram?
- By declaring global variables that can be accessed by both the calling program and the called subprogram.
- By using the ACCEPT and DISPLAY statements.
- By using the CALL statement without any additional clauses.
- By using the LINKAGE SECTION in the called subprogram and the USING clause in the calling program.
Data can be passed between a calling program and a called subprogram in COBOL by defining a LINKAGE SECTION in the called subprogram and using the USING clause in the calling program. This ensures proper communication and sharing of data between the two program units.
You are tasked with parsing and modifying a text field in a COBOL program. Which COBOL statement can help you achieve this?
- INSPECT statement
- PERFORM VARYING statement
- STRING statement
- UNSTRING statement
The UNSTRING statement in COBOL is used for parsing and extracting portions of a text field. It allows you to break down a text field into smaller components based on specified delimiters, enabling you to modify or manipulate the text as needed.