Escape (Or Back Door) in Application I/O Interface

question 27

Multiple Choice

Escape (or back door) in application I/O interface

• A) allows a user to interrupt a device at any time.
• B) allows access to a few additional devices, such as a time-of-day clock and a timer.
• C) transparently passes arbitrary commands from an application to a device driver.
• D) enables managing of devices with widely varying speeds ranging from a few bytes per second to gigabytes per second.

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Definitions:

Input Buffer

A temporary storage area utilized for holding input data before it is processed by a program, ensuring smooth and efficient data handling.

Format Modifiers

In programming, format modifiers are used with printf or scanf functions in C/C++ to specify the type and format of data to be inputted or outputted.

Variable++

Variable++ denotes the increment operator in programming languages like C and C++, which increases the value of the variable by one.

Cast Operator

A unary operator that forces one data type to be converted into another data type.