To answer this question, you need to understand the different components and statements within various programming languages and systems. Let's go through each option to understand why it is correct or incorrect:
Option A) DD statement - This option is incorrect because the DD statement is used in mainframe systems, such as IBM's z/OS, to define input and output data sets. It allows you to specify various attributes, including buffer space, for the data sets.
Option B) Assembler program - This option is incorrect because in assembler programs, you have control over memory management and can specify buffer space as needed.
Option C) AMS DEFINE - This option is incorrect because AMS (Access Method Services) DEFINE is used to define and manage data sets in mainframe systems. It provides options to specify buffer space, among other attributes.
Option D) COBOL program - This option is correct because in a COBOL program, you cannot directly specify buffer space. COBOL programs rely on the underlying system or runtime environment to handle buffering of input and output data.
The correct answer is D) COBOL program. This option is correct because buffer space cannot be directly specified in a COBOL program.