CS201 Short Questions 2 Lecture 2

Q2. Define System Software {QUIZ} {S.Q}

The system software controls the computer. It communicates with computer’s hardware (key board, mouse, modem, sound card etc) and controls different aspects of operations.

Q3. How many Sub categories of system software are?

1. Operating system · 2. Device drivers · 3. Utilities

Q4. What is the Operating System? { S.Q }

An operating system(sometimes abbreviated as "OS") is the program that manages all the other programs in a computer. It is a integrated collection of routines that service the sequencing and processing of programs by a computer. Note: An operating system may provide many services, such as resource allocation, scheduling, input/output control, and data management.

Definition

“Operating system is the software responsible for controlling the allocation and usage of hardware resources such as memory, central processing unit (CPU) time, disk space, and peripheral devices. The operating system is the foundation on which applications, such as word processing and spreadsheet programs, are built. (Microsoft)”

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Q5. What are Device drivers?

The device driver software is used to communicate between the devices and the computer. We have monitor, keyboard and mouse attached to almost all PC’s; if we look at the properties of these devices we will see that the operating system has installed special software to control these devices. This piece of software is calleddevice driver software. When we attach a new device with the computer, we need software to communicate with this device. These kinds of software are known as device drivers e.g. CD Rom driver, Sound Card driver and Modem driver. Normally manufacturer of the device provide the device driver software with the device. For scanners to work properly with the computers we install the device driver of the scanner. Nowadays if you have seen a scanner, it comes with TWAIN Drivers. TWAIN stands for Technology Without An Interesting Name.

Q6. What is Utility Software? {SQ

Utility software is a program that performs a very specific task, usually related to managing system resources. Utility software use for the disk management, Disk compression and Disk defragmentation in the computer. The compilers and interpreters also belong to the System Software category.

Q7. What are the Application software? {SQ

A program or group of programs designed for end users. For example a program for Accounting, Payroll, Inventory Control System, and guided system for planes. GPS (global positioning system), another application software, is being used in vehicles, which through satellite determines the geographical position of the vehicle