To retrieve the total number of occurrences in a table, you can use the _____ special register.
- COUNTER
- INDEX
- OCCURS
- REDEFINES
In COBOL, the OCCURS special register is used to retrieve the total number of occurrences in a table. It provides information about the size of the table defined using the OCCURS clause.
The ________ operator is used for raising a numeric value to a specified power in COBOL.
- CALCULATE
- EXPONENTIATION
- MATH
- POWER
In COBOL, the EXPONENTIATION operator (**) is used for raising a numeric value to a specified power. For example, X ** 2 represents X squared.
Which SQL statement is used in COBOL to retrieve data from a database table?
- DELETE
- INSERT
- SELECT
- UPDATE
The SELECT statement is used in COBOL programs to retrieve data from one or more tables in a database. It allows specifying the columns to be retrieved and conditions for filtering data, enabling the extraction of specific information from the database.
The ________ clause in the FILE CONTROL paragraph is used to specify the organization of a file.
- ACCESS
- FILE
- ORGANIZATION
- RECORD
In the FILE CONTROL paragraph of a COBOL program, the ORGANIZATION clause is used to specify the organization of a file. It defines how the records within the file are structured and stored, such as SEQUENTIAL or INDEXED.
In COBOL, the _____ clause is used to define a variable with a scope limited to a specific paragraph or section.
- FILE
- LINKAGE
- LOCAL-STORAGE
- WORKING-STORAGE
In COBOL, the LOCAL-STORAGE clause is used to define a variable with a scope limited to a specific paragraph or section. Variables declared under LOCAL-STORAGE are accessible only within the specific paragraph or section where they are defined.
How can you access individual data items within a COBOL group data item?
- By specifying the offset within the group item
- By using the INDEXED BY clause
- By using the LEVEL NUMBER clause
- By using the OCCURS clause
Individual data items within a COBOL group data item can be accessed by specifying the offset within the group item. This offset is used to navigate to a specific data item within the group.
In COBOL, the _____ feature of indexed files allows you to efficiently handle duplicate keys.
- Duplicate Key
- Index Key
- Merge Key
- Unique Key
The Duplicate Key feature in COBOL indexed files enables efficient handling of records with duplicate keys. This allows for easy retrieval and manipulation of data associated with duplicate key values.
How can file organization impact performance optimization in COBOL programs?
- Direct file organization results in slower access
- File organization has no impact on performance
- Indexed file organization offers better performance
- Sequential file organization allows for faster access
File organization significantly impacts performance optimization in COBOL programs. Sequential file organization generally allows for faster access due to its straightforward structure, minimizing seek time. Other file organizations may have different impacts based on the access patterns of the application.
What is the primary advantage of using Object-Oriented COBOL compared to traditional COBOL?
- Enhanced support for procedural programming
- Improved code reusability
- Increased program execution speed
- Simplified syntax
The primary advantage of Object-Oriented COBOL lies in improved code reusability. Object-oriented principles, such as encapsulation and inheritance, enable developers to create modular and reusable code, promoting a more efficient and maintainable software development process.
How is data storage allocated for a COBOL array defined using the OCCURS clause?
- Allocation based on the DEPENDING ON clause
- Allocation determined by the INDEXED BY phrase
- Contiguous memory allocation for all occurrences
- Separate memory allocation for each occurrence
Data storage for a COBOL array defined using the OCCURS clause is allocated contiguously in memory for all occurrences. This ensures that the array elements are stored in a sequential block, allowing for efficient access and manipulation of array data.