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Requirements define both specific objectives and constraints on those objectives.

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That may be true, but what is your question?

Posted on May 28, 2014

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What is difference between a class and an object with respect to Java?


This kind of question is a test of your knowledge of the terminology associated with object oriented programming. You should note that this question could just as well be asked in the context of a C++ programmer interview, or any programming position that requires object oriented programming for that matter.
The terms 'class' and 'object' are definitely related to one another, but each term holds its own distinct meaning. Let's start out by explaining what the term "class" means in the context of OOP. The term 'class' refers to the actual written piece of code which is used to define the behavior of any given class. So, a class is a static piece of code that consists of attributes which don't change during the execution of a program - like the method definitions within a class.
An object is an instance of a class The term 'object', however, refers to an actual instance of a class. Every object must belong to a class. Objects are created and eventually destroyed - so they only live in the program for a limited time. While objects are 'living' their properties may also be changed signficantly.
An example will help clarify what we've said. Suppose we have a class called 'Animal'. All Animals have bodies and brains - and these could be the attributes of our fictional Animal class. We can also add some methods that would be common to all Animals - like "movement", because all animals can move (maybe you can think of a better example for methods, but hopefully you get the point). So, the idea you really want to enforce in your own mind is that this very general 'template' of an Animal does not change - it's simply just some lines of code that define the Animal class.
An instance of the Animal class would be a specific animal - like a lion, a cat, or a zebra. These instances of the Animal class would be called objects. Whereas the Animal class is a general concept, the instances of that class - the lions, cats, etc - take that general concept and create a real instance of it. That is why programmers define constructors for their classes - so that when someone wants to create an object of the class, he/she can just pass in the actual properties that he/she wants the object to have - like what kind of animal it is, the name, the weight, etc. So, you can think of a constructor as something that brings the class to life - which is why it is called a constructor, because it constructs a specific instance of a class.
Objects have a lifespan but classes do not And, as our Animal example clearly shows, every object has a lifespan associated with it - a cat or zebra can not live forever. And, the properties of those objects can change as well while they 'live'; if we have a 'size' variable defined in the class that would of course change as the cat object grows bigger.
Object versus class summary So, we can say that whereas a class is a general concept (like an Animal), an object is a very specific embodiment of that class, with a limited lifespan (like a lion, cat, or a zebra). Another way of thinking about the difference between a class and an object is that a class provides a template for something more specific that the programmer has to define, which he/she will do when creating an object of that class.
Objects have a lifespan but classes do not And, as our Animal example clearly shows, every object has a lifespan associated with it - a cat or zebra can not live forever. And, the properties of those objects can change as well while they 'live'; if we have a 'size' variable defined in the class that would of course change as the cat object grows bigger.
Object versus class summary So, we can say that whereas a class is a general concept (like an Animal), an object is a very specific embodiment of that class, with a limited lifespan (like a lion, cat, or a zebra). Another way of thinking about the difference between a class and an object is that a class provides a template for something more specific that the programmer has to define, which he/she will do when creating an object of that class.

Jul 16, 2014 | Computers & Internet

5 Answers

Some requirement for SQL server repair


Read this blog at the following link: http://recoverymaster.livejournal.com and know helpful details about MS SQL server database recovery wizard. You can download this software: http://www.sqlrecovery.org

Jun 10, 2014 | Microsoft Database Software A5K-02817 SQL...

1 Answer

Give me some basic idea about proposal dissertation paper?


A dissertation proposal includes following
Title
Introduction
Aims and objectives
Methodology
Literature survey
Scope and constraints
Resources
Timetable
Outline of sections/chapters
References

In case if you are unable to write it, https://www.affordable-dissertation.co.uk/ can help you.

Feb 24, 2014 | EzKey EZ7000 Smart Office Keyboard PS2

1 Answer

Choose any six out of 7 part of internal technology framework


The 7 factors as per the framework can be defined as follows:

  1. Strategy: It is defined as an action plan working towards the organizational defined objective.
  2. Structure: It is defined as design of organization-employees interaction to meet defined objective.
  3. Systems: It is defined as information systems in which organization has invested to fulfill its defined objective.
  4. Staff: It is defined as workers employed by the organization.
  5. Style: It is defined as the approach adopted by the leadership to interact with employees, supplier and customers.
  6. Skills: It is defined as characteristics of employees associated with the organization.
  7. Shared Values: It is the central piece of the whole 7S framework. It is a concept based on which organization has decided to achieve its objective.
Here 7 factors are used for internal technologies.Have you heard about new personal networking gadget package.It is a wonderful technology.That is made in simple pen style model. Latest Pen Style Technology for Personal Networking Gadget Package

Feb 03, 2014 | Computers & Internet

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Error code oxcoooooe9 what does it mean


tech_details.gifAn executive worker thread is being terminated without having gone through the worker thread rundown code, which is not allowed.
After the Stop code will be 4 hex values: {Parameter 1, Parameter 2, Parameter 3, Parameter 4}.
Parameter 1 specifies the exiting ETHREAD (the ETHREAD structure is an opaque structure that serves as the thread object for a thread).
Parameter 2 is not defined.
Parameter 3 is not defined.
Parameter 4 is not defined.

Have you recently installed a new device or software? If so, system restore might fix you up. This site will show you how to determine what specific module caused the problem. It is somewhat complex but just follow the instructions.

http://thelazyadmin.com/blogs/thelazyadmin/archive/2006/05/23/Debugging-STOP-Errors-With-WinDBG.aspx

Aug 05, 2010 | Toshiba Satellite L305-S5908 Notebook

1 Answer

Creating a ring using two circles in c++ program


Nice try!

If nobody has helped you since September 2008, when you asked the question, you probably scored a "zero" in your computer-programming course, and probably don't need an answer to your "homework" assignment.

Sep 15, 2008 | Computers & Internet

1 Answer

J2SE


Many languages claim to be Object-Oriented. While the
exact definition of the term is highly variable
depending upon who you ask, there are several
qualities that most will agree an Object-Oriented
language should have:

1. Encapsulation/Information Hiding
2. Inheritance
3. Polymorphism/Dynamic Binding
4. All pre-defined types are Objects
5. All operations performed by sending messages to
Objects
6. All user-defined types are Objects
Fair enough...

Java IS by virtue of 1, 2, 3, and 6.
Java IS NOT by virtue of 4 and 5 (not all pre-defined types are Objects, and not all operations are performed by sending messages to Objects).

But since the definition says only that an OOPL should have these things, then Java qualifies.

Next up; given that definition, how would one define "100%"? Exhibiting all those qualities? If that's the case, Java fails the "purity test".

Sep 12, 2008 | Sun Computers & Internet

1 Answer

Schema


In AD, the schema is the list of "properties", or attributes of each item an AD "object".

There are different object types - user, computer, group, and so on. Some properties exist for all objects - "name", "create date", etc. Other properties only make sense for certain objects - a user has a "phone number", but a computer object does not.

So the schema is a list that says what "object types" are defined, what "properties or attributes" are defined, and which properties are valid for which objects.

Jul 20, 2008 | Microsoft Windows Server Standard 2003 for...

1 Answer

Schema classes and attributes


Every directory object you create is an instance of an object class contained in the schema. Each object class contains a list of associated attributes that determine the information the object can contain. Classes and attributes are defined independently, so that a single attribute can be associated with multiple classes. All schema classes and attributes are defined by the classSchema and attributeSchema objects, respectively.

Classes

ClassSchema objects are used to define classes in the schema. A classSchema object provides the template for building directory objects of that class. Examples of classSchema include User and Server. A classSchema object contains, among other things, the following information:
Class type (structural, abstract, or auxiliary)

Common name and Lightweight Directory Access Protocol (LDAP) display name

Lists of the "must contain" and "may contain" attributes for instances of the object

Relative distinguished name attribute

A list of possible parent classes

Class types

Three different types of classes exist in the schema:Class type Purpose

Structural
Used to instantiate objects (users, servers and so on) in the directory.

Abstract
Provides templates for deriving structural classes

Auxiliary
Contains predefined lists of attributes that can be included in structural and abstract classes

Attributes

AttributeSchema objects are used to define attributes in the schema. An attributeSchema object determines the allowable contents and syntax for instances of that attribute in the directory. Examples of attributeSchema include User-Principal-Name and Telex-Number. An attributeSchema object contains, among other things, the following information:•
Common name and LDAP display name

Syntax rules

Data constraints (single versus multivalued, minimum, and maximum values)

Whether and how the attribute is indexed

Jul 17, 2008 | Microsoft Windows Server Standard 2003 for...

1 Answer

SQL Server Data Export


The best way to handle this situation is to generate a script of the database objects and then run it on the remote server before exporting the data.

Jan 23, 2008 | Computers & Internet

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