Insert the correct missing number from the choices given

Which among the following can be called an electronic check ? 

Which operating system guarantees real-time processing within strict timing constraints?

Which of the following computers is used for large-scale real-time processing?

Which memory organization technique stores data in rows and columns?

A universal product code is read by what type of scanner:

Communication controls for the entire computer system?

A group of 8 bits is known as a ________.

In Microsoft Excel, which bar allows users to input formulas and data directly into cells?

Shortcut to insert a new worksheet in Excel is?

What is the purpose of a fuser unit in a laser printer?