Indexed file organization in COBOL is suitable for random access to records. It employs an index file that contains pointers to the actual records, enabling direct access based on the indexed key.

The SQRT intrinsic function in COBOL is used to calculate the square root of a given number. It is suitable for scenarios where you need to perform mathematical operations involving square roots.

In COBOL, the ON EXCEPTION condition handler is specifically designed for handling unexpected runtime errors, such as divide-by-zero or overflow errors. In contrast, the WHEN condition handler is used for handling logical conditions in the program.

Employing a combination of shared and exclusive locks strategically is the preferred approach. Shared locks allow multiple users to read the file simultaneously, while exclusive locks ensure exclusive access for write operations, minimizing conflicts and ensuring data integrity in a multi-user environment.

Handling exceptions related to network connectivity issues can be done by using the COBOL ON EXCEPTION clause. This allows you to specify actions to take when a particular exception occurs, such as handling network-related errors gracefully in the context of interacting with external web services.

In Object-Oriented COBOL, an object is an instance of a class. A class defines a blueprint or template for objects, and an object is a concrete realization of that blueprint, encapsulating both data and behavior associated with the class.

The OCCURS clause in COBOL can be applied to both group items and elementary items. It allows the definition of repeating data structures for both simple and complex data types, providing flexibility in handling repeated data.

The KEY clause in COBOL is used to define the format of the index or key field in indexed files. It specifies the data item that serves as the key for organizing and accessing records in the file.

The key difference is that the REDEFINES clause is used for reinterpreting data with different formats, allowing multiple ways to view the same storage, while the RENAMES clause provides alternate names to data items, giving them multiple identifiers without changing the storage.

The index or key in indexed file processing serves as a unique identifier for each record, allowing the system to locate and retrieve the desired record efficiently. It facilitates quick and direct access to records based on the specified key.

When the REDEFINES clause is used in COBOL, the memory occupied by the redefined data items is shared with the memory of the original data item. This means both the original and redefined data items refer to the same memory location, enabling different ways to interpret the stored data.

Recovery is a technique used in COBOL to ensure data integrity during exceptional situations. It involves actions such as rollback, checkpoint, or restart to bring the system back to a consistent state after an exception.