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Software Engineering
Software engineering is the process of applying well-developed techniques and practices in order to create new software products. Questions about everything from design patterns to requirements and specification belong here.
1,663 Questions
When a building in an earthquake leans over far enough the force of gravity starts to act on the portion offset from the initial position of the building pulling it down further. That extra pull is called a p-delta effect
The P-delta effect also refers to the second order (i.e. non-linear) effect of forces on the structure. As a results of the displcement, the stiffness changes, which in turn changes the force to be different than the linear analysis.
In a linear analysis, a stiffness matrix K can be defined such that
d = K*f
where f is the vector of forces and d is the vector of displacements.
In a P-delta analysis, there are additional non-linear effects, whether based on iteration or an closed for m solution.
What is the scope of Information technology engineering?
bhenchod,it has pretty wide scope but u should choose mechanical engg for the best future
What is a double keyed deadlock?
a lock that requires a key to be opened on both sides. common in inner cities and high crime areas.
What are the 3 main parts of computer?
CPU, Motherboard, Ram.
but you also need things like power supplies, keyboards, monitors.
ok, first of all, the hardrive. you know, the thing that stores all the data? then, probably the coding to the drive ports. last, usually the smaller the better so the casing. please correct me if im wrong because i know i have to me on one or two..:)
What is distributed software engineering?
Distributed Software engineering is combination of distributed system engineering and distributed system architecture
For more detail you need to go through the following topics
1)Distributed systems issues
2)Client-server computing
3)Architectural patterns for distributed systems
4)Software as a service
The HSE is an organization in the United Kingdom and stands for Health and Safety Executive. Their role is to keep people from becoming ill or injured on the job.
Write a note on ATM layer performance measurement?
ATM LAYER PERFORMANCE MEASUREMENT
ATM Layer Performance:- It is known as information transfer performance and refers to performance related to cell transport service provided by network. The two key issues of ATM layer are:-
NP (Network performance)
Quality of Service (QOS)
1. Network Performance:- It is used to manage the network and include parameters that are meaningful to network providers for system design configuration, operation and maintenance.
Network performance is measure by network at various points while QOS is measure at end point. During continuation of service, these parameters can be calculating without affected users traffic. This require the NP procedure to be activated and de-activated. The calling end-point (A) generate an activation or de-activation request towards another end point (B) with request for action on either A to B, B to A or both direction. The requirement is generated with help of ATM OAM cell.
I. ATM OAM Cell, Activation, de-activation function specific fields:-
II.
Message ID
000001 à Activation request
000010 à Activation confirmed
000011 à Activation request denied
000101 à Deactivation request
000110 à Deactivation confirmed
000111 à Deactivation request denied
If other point B respond to all of request then activation or deactivation confirmed message is returned otherwise activation deactivation confirmed message, request denied message is confirmed.
2 Direction of action:
It has two value that is from activator(10) or towards activator(01).
3 Correlation tag:
It has same value for all packets.
4 PM block size A-B:
It is identifier performance measurement block which can supported from A to B by a bit mask of 1024 bytes, 512, 256, 00 128 bytes. From most significant bit to least significant bit respectively.
5 PM block size B-A:
It identifies the performance measurement block which can be supported from B to A by a bit mask of 1024, 512, 256, 128 bytes from most significant bit to least significant bit respectively.
Quality of Service (QOS):- QOS is end users view about working of network and includes parameters that can be directly observe and measure by user and are described in network independent terms.
QOS is defined in terms of following cell transfer outcomes:-
Successful cell transfer outcome:- the cell is received corresponding to transmitted cell within a specified time. The binary content of received cell confirm exactly to corresponding cell payload and the cell is received with valid header field.
Errored cell outcome:- the cell is received within specified time but binary content of received cell payload differs from that of corresponding transmitted cell.
Cost cell outcome:- no cell is received corresponding to transmitted cell within specified time.
Misinserted cell outcome:- a received cell for which there is no transmitted cell.
Severely error cell block outcome:- when N or more cell outcome or errored cell outcome are reserved in a received cell block of N-cells transmitted consecutively on a given connection.
Parameters for measuring information transfer performance:-
Cell delay variation.
Cell error ratio.
Cell Loss Ratio
Cell Misinsertion Ratio
Cell transfer delay
Cell error ratio: is the ratio of PDU's received at an end point which contains an invalid CRC in relation to total no. of cells properly transmitted associated with given traffic load.
Signal metrics:
1. CAC rejection or denial time: The amount of time required fo0r CAC to determine that cell must be rejected, it is measured in seconds.
Connection establishment time:- The amount of time between first setup message from calling party and connect message to it. It is also measured in seconds.
Connection teardown time:- The amount of time between the release message being sent and release complete message being received. It is also measured in seconds.
What is robustness testing in software engineering?
Robustness has been defined by the Food and Drug Administration as "the degree to which a software system or component can function correctly in the presence of invalid inputs or stressful environmental conditions."
A virtual function must be declared as a non-static member method of a class that you expect to act as a base class. Declaring a virtual function adds some overhead as a result of creating the v-table (virtual method table), but most of that overhead is paid with the first virtual function (subsequent virtual functions just add a new entry to the already-existing v-table). However, do not declare a virtual function unless you expect that function to be overridden. Bear in mind that overriding an overloaded, non-virtual function "hides" all the overloads in the base class.
If a virtual function must be overridden, declare it as pure-virtual instead. You do not need to implement the method in the base class, but you will be reminded to provide an implementation in the derived class at compile time if one does not exist, even if you provide a default implementation in the base class. Bear in mind that base classes with one or more pure-virtual methods become abstract -- they cannot be instantiated.
If there is any virtual function or pure-virtual function, there must also be a virtual destructor, as well as a public or protected default constructor (a constructor with no arguments). When a derived class is constructed, it calls the base class constructor, which calls its base class constructor. Derived classes are constructed in sequence, beginning with the least-derived class. Destruction is the reverse -- the most-derived class is destroyed before the base classes are destroyed.
Virtual functions can be invoked just like any other class member method, both via an object reference's member operator (.), and the indirection operator (-->) for pointers to objects. It does not matter whether the reference or pointer refers to a base class or a derived class; the v-table decides which override (where one is provided) will actually execute, starting from the most-derived override and working back towards the base class, the least-derived. With appropriate use of virtual functions, dynamic casting can be avoided completely (dynamic casting should never be employed as it completely defeats the point of having a v-table in the first place).
Answer1.the virtual function should be a member of some class 2.they cannot be a static member3.they are accessed by using object pointers
Definition of internal register?
It's a physical memory location in the CPU that allows quick data manipulation - it's like a post-it note to your desktop - meant for small bits of data manipulation very quickly, not heavy long amounts of data like a physical ledger's spreadsheet. In general, the more registers there are in a CPU, the faster it can handle data; external data pulls are not required for simple procedures.
What is the concurrent development model?
The concurrent development model, sometimes called concurrent engineering
The concurrent process model can be represented schematically as a series of major
technical activities, tasks, and their associated states. For example, the engineering
activity defined for the spiral model is accomplished by invoking the following tasks: prototyping and/or analysis modeling, requirements specification,
and design.
The activity-analysis-may be in any one of the states noted at any given time. Similarly, other activities (e.g., design or customer communication) can be represented in an analogous manner. All activities exist concurrently but reside in different states. For example, early in a project the customer communication
activity has completed its first iteration and exists in the awaiting changes state. The analysis activity (which existed in the none state while initial customer
communication was completed) now makes a transition into the under development state. If, however, the customer indicates that changes in requirements must be made, the analysis activity moves from the under development state into the awaiting changes state.
The concurrent process model defines a series of events that will trigger transitions
from state to state for each of the software engineering activities.
15 uses of cathode ray oscilloscope?
five possible uses :
* Calibrate an oscillator
* Compare two frequency generators
* Phase shift determination b/w V and I in any CR circuit
* study Beats phenomenon
* study Lisajjous figures
What is the error rate of coaxial cable?
The bit error rate is a standard transmission-error rate of a medium such as copper wire, coaxial cable, or fiber-optic cable. Coaxial cables have a low error rate that is generally 1 in 1 billion bps.
Advantage of personal computer?
There are many advantages to owning a personal computer. These advantages depend on how an individual uses the computer. Personal computers are used for many tasks from teaching preschool age children to money and account managing.
Importance of software engineering in statistics?
Software engineering (SE) is the profession, practiced by software engineers, concerned with specifying, designing, developing and maintaining software applications by applying technologies and practices from computer science(CS), project management, and other fields, which improves the productivity of developers and the quality of the application they develope.
What is the difference between reverse engineering and copy?
Reverse Engineering requires manufacturing and operational tolerances to be calculated. It can also include recalculation of materials and seals.
What are facts about a computer software engineer?
The average annual salary for computer applications software engineers was $85,660 per year in 2007. That same year, systems software engineers made an average of $90,780 per year.
Looking ahead, there are expected to be 324,000 new computer software engineers through 2016. Of those, 226,000 will work as applications software engineers and the rest will work as systems software engineers. There should be a total of 1.1 million computer software engineers by 2016.
In software engineering field What is Fan-in and Fan-out with reference to program structure?
Fan-in and Fan-out metrics are structural metrics which measure inter-module complexities. Fan-in: the number of modules that call a given module
Fan-out: the numbers of modules that called by a given module
Pro e which is short for Pro/Engineer is the software product of the company, Parametric Technology Corporation. This software is used in the Engineering field to produce and analyze different designs. It is designed to increase the user's productivity in this field.
It stands for INFORMATION SUPERHIGHWAY, a term use to describe internet. It is also called digital telecommunication system or internet telecommunication networks.
Volume of pressure vessel formula?
what is the formula for calculating volume of preesure vessels with dishe ends
From management point of view the balanced MIS is an approach to performance measurement that combines traditional financial measures with non-financial measures to provide managers with richer and more relevant information about activities they are managing.
