Device Drivers

In: Computers and Technology

Submitted By muskansidhu
Words 1999
Pages 8
Q1. What is device driver? OR Use of driver software. Ans. A device driver or software driver is a computer program allowing higher-level computer programs to interact with a hardware device. A driver typically communicates with the device through the computer bus or communications subsystem to which the hardware connects. When a calling program invokes a routine in the driver, the driver issues commands to the device. Once the device sends data back to the driver, the driver may invoke routines in the original calling program. Drivers are hardware-dependent and operating-system-specific.
Uses of device driver:
a. A device driver simplifies programming by acting as a translator between a hardware device and the applications or operating systems that use it. Programmers can write the higher-level application code independently of whatever specific hardware device it will ultimately control, because code and device can interface in a standard way, regardless of the software superstructure or of underlying hardware b. The device-driver accepts these generic high-level commands and breaks them into a series of low-level device-specific commands as required by the device being driven. c. Drivers can provide a level of security as they can run in kernel-mode thereby protecting the operating system from applications running in user-mode.

SECTION - B ( 5 MARKS )

Q1. Describe the problem that occur when you attempt when you attempt to connect together two RS-232-C devices that are both configured as DTE. Draw a diagram which shows how this problem can be solved. Ans. The wiring of RS232 has always been a problem. Originally the standard s defined for DTE, Data terminal equipment to DTE, data communication equipment connection, b soon people started…...

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