Question

Some of the questions relate to Visual C#

1. Tell what each of the following parts of a computer system does.

• CPU

• Main memory

• Secondary storage

• Input devices

• Output devices

2. What are is the difference between system software and applications software?

3. What is machine level language? What is high level language?

4. What is the difference between compilers and interpreters? How do these relate to programming using C#?

5. Compare a GUI with a command line interface. Which of these does C# support?

6. Describe event-driven GUI programming.

7. Visual C# has both visible and invisible objects. Give an example of each.

8. What is the difference between the toolbar and the tool box?

9. When you create a Visual C# program, does it consist of one file or more than one file?

Answer 1

CPU is responsible for the execution of programs by performing basic arithmetic and logic and IO operations.
Main memory is responsible for the holding the program executable code. CPU has direct access to this memory to get the instruction/data about the program it is currently working on.
Secondary memory is the large storage that is responsible for permanent storage of data.
Input devices are used to give input to the CPU example: mouse, keyboard.
Output devices are used to give output to the user example: monitor, printer.

System software is the main software that is required to run the computer. It is used for operating the computer hardware. It is installed when the operating system is install. It is always working in the background like a link between a keystroke you press and it being that exact keypress on the screen. They run independently and don't require a platform. Application software is a software that allows user to do a specific task example microsoft word. It is installed as per user requirements. These can't run independently and require presence of a system software.

Machine level language is a language that can be understood by machine only and not by user. It comprises of 0 and 1. Although a user can understand this but it is not at all beneficial in any way. A high level language is programming language written in a user understandable language like in C(in English). Users can use these languages to create programs.

A compiler is a translator which transforms high level language code into object language. An interpreter is a program which imitates the execution of programs written in source language. Compiler works on the whole program while interpreter transforms the program line by line. C# uses a compiler.

GUI is a graphical interface that can be used to interact with anything in question. It helps in communicating with the computer with help of graphical icons and visual indicators. On the other hand CLI uses a single cursor usually on a black screen to take an input. C# can be used to create GUI but by default accepts inputs by CLI.

We have to execute an action but until the user makes an action we dont know which action we want to execute because it is all dependent on the user. What the user does is an event and how you respond to the event is known as event driven programming. C# uses delegates and events for the purpose.

Toolbar is GUI bar that contains a set of tools usually marked with icons whereas a toolbox is a set of pre-existing routing for use in writing new programs.

It will consist of more than one file.