COBOL/DB2 and CICS Programming

STARTBR establishes a starting position for sequential browsing of a VSAM file. After STARTBR, you use READNEXT to read records sequentially. STARTBR doesn't read or write by itself - it just positions the browse. READNEXT handles the actual reading.

ASRA is a CICS transaction abend that occurs when a program encounters a data exception or program check, such as SOC7 (data exception) or SOC4 (storage violation). Option A would cause an AEY3 or AEY9 abend, while option C is an ASRA timeout abend (different type). ASRA specifically means the program crashed.

PUSH HANDLE CONDITION suspends the current error handling mechanism by pushing it onto a stack. This is useful when you want to temporarily use different error handling logic. The suspended handler can be restored using POP HANDLE CONDITION.

POP HANDLE CONDITION reactivates the previously suspended error handler by popping it off the stack. This restores the error handling that was put aside by a previous PUSH command. POP and PUSH work together to manage nested error handling scenarios.

CICS supports multiple interface options: GUI front-ends can use External Call Interface (ECI), presentation logic can connect via MQ Series messaging, and web applications can communicate through HTTP using CICS Transaction Gateway. All these approaches are valid CICS integration methods.

CICS provides two main mechanisms for handling unusual conditions: the RESP option returns a response code that you can check after each command, and HANDLE CONDITION/ABEND commands let you specify error handling routines. Option A is non-existent terminology, while C and D are not standard CICS approaches.

COMMAREA (Communication Area) is a mechanism to pass data between CICS programs, typically during LINK or XCTL commands. It's not for terminal communication (that's TIOA), not for local storage (that's working storage), and not for inter-CPU communication (CICS runs on one CPU). COMMAREA enables program-to-program data transfer.

DB2 supports simple, segmented, partitioned, and LOB (Large Object) tablespaces, making this combination the correct classification.

The four DML (Data Manipulation Language) statements in DB2 are SELECT (retrieve), UPDATE (modify existing), DELETE (remove), and INSERT (add new). These are the core statements for modifying table data.

Auxiliary tables store large object (LOB) data types - images, audio, video, and documents - separately from the main table. The main table contains pointers/locators to the auxiliary table which holds the actual binary data.

The SQLCA (SQL Communication Area) is the standard structure used to communicate execution status and error codes (like SQLCODE and SQLSTATE) between DB2 and a COBOL program.

Host variable structures in embedded SQL (COBOL, C, etc.) cannot contain OCCURS (array) clauses. Each host variable must be a simple scalar. Arrays must be handled individually through separate variable declarations or different mechanisms.

Dynamic SQL statements are prepared and bound dynamically at run time, whereas static SQL statements are embedded and bound before execution. Therefore, the statement is false.

COBOL COPY statements are expanded during the PRECOMPILE stage, not the pre-compile stage. The precompiler processes COPY statements by inserting the copied text into the source program before the actual compilation begins. This is a critical distinction in the COBOL/DB2 compilation process.

SQL DATE, TIME, and TIMESTAMP data types are NOT accepted as character strings in COBOL programs. They must be declared using specialized SQL host variable declarations (like SQL DATE, SQL TIME, SQL TIMESTAMP) or converted using explicit date/time handling routines. Direct character string assignment would cause type mismatch errors.

Null indicator variables in COBOL/DB2 programs must be declared as PIC S9(04) COMP, which is a 4-byte signed binary integer. This format can store values indicating null status (-1 for null, 0 for not null, or positive values for truncated data). The 4-byte size matches the SQL standard for null indicators.

In Dynamic SQL, COMMIT or ROLLBACK does NOT destroy prepared statements. The prepared statement remains valid after transaction boundaries and can be reused without re-preparation. Only explicitly deallocation (via DEALLOCATE PREPARE) or session termination destroys the prepared statement.

The BIND step analyzes static SQL statements, determines the most efficient access paths to the data, and stores this information in a plan or package. Precompile simply converts SQL to calls, while plan and package are the outputs of bind. BIND is the optimization phase.