Assembly Programming Language

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The objective of this session is to introduce the subject of software engineering. When you have read this session you will understand what software engineering is and why it is important, know the answers to key questions which provide an introduction to software engineering, understand ethical and professional issues which are important for software engineers.

Introduction

Virtually all countries now depend on complex computer-based systems. More and more products incorporate computers and controlling software in some form. The software in these systems represents a large and increasing proportion of the total system costs. Therefore, producing software in a cost-effective way is essential for the functioning of national and international economies.

Software engineering is an engineering discipline whose goal is the cost-effective development of software systems. Software is abstract and intangible. It is not constrained by materials, governed by physical laws or by manufacturing processes. In some ways, this simplifies software engineering as there are no physical limitations on the potential of software. In other ways, however, this lack of natural constraints means that software can easily become extremely complex and hence very difficult to understand.

Software engineering is still a relatively young discipline. The notion of ‘software engineering’ was first proposed in 1968 at a conference held to discuss what was then called the ‘software crisis’. This software crisis resulted directly from the introduction of powerful, third generation computer hardware. Their power made hitherto unrealisable computer applications a feasible proposition. The resulting software was orders of magnitude larger and more complex than previous software systems.

Early experience in building these systems showed that an informal approach to software development was not good enough. Major projects were sometimes years late. They cost much more than originally predicted, were unreliable, difficult to maintain and performed poorly. Software development was in crisis. Hardware costs were tumbling whilst software costs were rising rapidly. New techniques and methods were needed to control the complexity inherent in large software systems.

These techniques have become part of software engineering and are now widely although not universally used. However, there are still problems in producing complex software which meets user expectations, is delivered on time and to budget. Many software projects still have problems and this has led to some commentators (Pressman, 1997) suggesting that software engineering is in a state of chronic affliction.

As our ability to produce software has increased so too has the complexity of the software systems required. New technologies resulting from the convergence of computers and communication systems place new demands on software engineers. For this reason and because many companies do not apply software engineering techniques effectively, we still have problems. Things are not as bad as the doomsayers suggest but there is clearly room for improvement.

Quiz PDF eBook: 
Assembly Programming Language
Download Assembly Quiz PDF eBook
64 Pages
2010
English US
Educational Materials



Sample Questions from the Assembly Programming Language Quiz

Question: Memory segments can start every:

Choices:

1 paragraph (16 bytes)

1 word (2 bytes)

1 byte

Question: When you power on the computer it starts executing instructions in:

Choices:

ROM

RAM

Hard Disk

Question: The Debug program is a small MS-DOS utility and is usually useful in:

Choices:

Writing sophisticated applications and systems

Memory and disk management

Testing and fixing programs

Question: The processor set the sign flag on when it detects

Choices:

The MSB of the result is 1

Negative number in AX register

Both (a) and (b) are correct

Question: The ROM BIOS contents:

Choices:

Can be written by the DEBUG program

Written by the ROM manufacturer and can not be changed

Volatile and must be refreshed on computer power on

Question: The maximum memory space addressable by a processor is proportional to:

Choices:

Register size

Address bus width

Number of registers

Question: The physical address 12345 can be represented by the logical address:

Choices:

1234:5

1230:45

Both (a) and (b) are correct

Question: The ROM BIOS contains:

Choices:

MS-Dos operating system

MS-Windows operating system

Basic input ; output system routines

Question: The mapping between the physical address and logical address (Segment:Offset) is:

Choices:

One to one relation

One to many relation

No relation

Question: The maximum memory space addressable by 8086 processor was:

Choices:

64 KB

640KB

1MB

Question: The limitation on The maximum memory space addressable by 8086 processor because:

Choices:

The address bus width was 20 bits

The register size was 16 bits

It has only 14 registers

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