Explain When is Marshalling not necessary?

Correct Answer: IUnknown as an interface of a COM object Every COM object has to support IUnknown, besides optionally adding other interfaces IUnknown is made of QueryInterface, AddRef and Release

Correct Answer: By setting the columnSpan property for cells of each row as required

Correct Answer: Check EIBRESP after the call or use the HANDLE condition

Correct Answer: Marshalling is the process of gathering data from one or more applications or non-contiguous sources in computer storage, putting the data pieces into a message buffer, and organizing or converting the data into a format that is prescribed for a particular receiver or programming interface

Correct Answer: A system call is a functionsubroutine which interrupts the currently executing program and transfers control to the interrupt routineThe contents of the executing program are saved and after the interrupt routine finishes its function,control is transferred back to the executing program If we talk in the context of Linux then System calls are called kernel mode Whereas API (Application Programming Interface) is a function or a set of functions, objects, protocols or data-structures for the support of application development for developers/programmers It is actually a kind of function definition which specifies how to make available of a specific service of the system/OS to the other program/process or system Read more at: https://wwwqueryhomecom/48442/os-what-is-difference-between-system-call-and-api

Correct Answer: COM is the component Object Model is a system whch creates application which are binary form that is language independent , object oriented ,modular and reusable

Correct Answer: NTFS, FAT & FAT 32 are the file systems of NT

Correct Answer: Visual Basic is not support Inheritance and Data binding OOPS Concept

Correct Answer: With the help of Excel App instance we can execute a Macro in VB code EXcelAppInstanceApplicationRun("MacroName")

Correct Answer: DDE (Dynamic Data Exchange) a communication protocol that let applications call each other OLE was the first protocol that enabled users and programmers to create compound documents?that is documents that contain data from different applications (for example an Excel worksheet inside a Word document)