Top 20 wpf interview questions and answers pdf ebook free download

Interview questions and answers – free pdf download Page 1 of 38
Top 20 wpf interview
questions and answers

Job interview checklist:
- Pick out proper clothes.
- Research the company.
- Speak to past and present
employees.
- Run through questions
you may be asked.
- Practice with a friend or
family member.

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• http://jobinterview247.com/free-ebook-145-interview-
questions-and-answers
• http://jobinterview247.com/free-ebook-top-22-secrets-to-
win-every-job-interviews
• Top 7 job search, resume writing, job interview materials:
http://interviewquestions68.blogspot.com/2017/02/top-7-job-
interview-materials.html

Tell me about yourself?
This is probably the most asked
question in wpf interview. It breaks the
ice and gets you to talk about
something you should be fairly
comfortable with. Have something
prepared that doesn't sound rehearsed.
It's not about you telling your life story
and quite frankly, the interviewer just
isn't interested. Unless asked to do so,
stick to your education, career and
current situation. Work through it
chronologically from the furthest back
to the present.

What is WPF?
WPF stands for Windows
Presentation Foundation. It is an
application programming
Interface for developing rich UI
on Windows. WPF is introduced
in .NET 3.0. By the use of WPF
we can create two and three
dimensional graphics,animations
etc.

What Can You Do for Us That Other Candidates Can't?
What makes you unique?
This will take an
assessment of your
experiences, skills and
traits. Summarize
concisely: "I have a unique
combination of strong
technical skills, and the
ability to build strong
customer relationships.
This allows me to use my
knowledge and break down
information to be more
user-friendly."

Describe the types of documents supported by WPF?
There are two kinds of document
supported by WPF
a)Flow format:Flow format
document adjusts as per screen
size and resolution
b)Fixed Format:Fixed Format
document does not adjust as per
screen size and resolution

What namespaces are needed to host a WPF control in
Windows form application?
The following namespaces
needs to be referenced :
a)PresentationCore.dll
b)PresentationFramework.dll
c)UIAutomationProvider.dll
d)UIAutomationTypes.dll
e)WindowsBase.dll

What is Dependency Property In WPF?
Windows Presentation
Foundation (WPF) has a set of
services that is used to extend
the functionality of a common
language runtime property.
These services are referred as
the WPF property system. A
property that is backed by the
WPF property system is known
as a dependency property

What is routed event in WPF?
A WPF user interface is
constructed in a layered approach,
where one visual element can
have zero or more child elements.
so we can visualise the elements
tree for the full page. Routed
events are a new feature provided
by WPF which allows events to
travel down the elements tree to
the target element, or bubble up
the elements tree to the root
element. When an event is raised,
it "travels" up or down the
elements tree invoking handlers
for that event on any element
subscribed to that event it

encounters en route.This tree
traversal does not cover the entire
elements tree, only the ancestral
element chain between the root
element and the element which is
the target of the event.

What are the Resources, Styles and Triggers?
Style - element containing setter
elements.
Triggers - used to change the
look and feel of the controls
dynamically.
Resources - Styles and Triggers
are stored in the resources
Static Resources - resources are
searched at load time
Dynamic Resources - If the
resource changes while the
program is running

What is Property Invalidation?
Its used to update the custom
control whenever the property
changes.Adding property
invalidation callbacks to a
custom control is as easy as
adding a
PropertyChangedCallback
object to a PropertyMetadata
object and add this
PropertyMetadata object to
Register() or RegisterAttached()
methods.

What is the most common format for declaring a data
binding in markup?
Markup extensions are the most
common means of declaring a
data binding. They are identified
by the use of curly brackets
({}).The less common format is
XAML.

Is x:Static the same as a data binding
x:Static is another markup
extension that is different from the
data binding markup extension. It is
used to retrieve data from static
value members on classes.

What is the difference between key binding and mouse
binding?
KeyBinding allows you to
define gestures for
commands that consist of a
keystroke possibly
combined with one or more
modifiers, whereas
MouseBinding allows you
to define gestures for the
mouse that can also be
optionally combined with
modifiers on the keyboard.

What is the difference between WCF and WF?
Windows Communication Foundation
is focused on messaging. This API
greatly simplifies all sorts of
networking and communication tasks.
It covers everything from web services
to remoting to P2P and more.
A powerful library for building
workflow enabled applications. It
utilizes a markup language for
declaring workflows in an
application,and thus prevents
workflow from becoming hard-coded.
It also makes it very easy for
developers to create custom workflow
tasks

What is XAML?
XAML (pronounced as Zammel) is a
declarative XML-based language by
which you can define object and
properties in XML. XAML document
is loaded by a XAML parser. XAML
parser instantiates objects and set
there properties. XAML describes
objects, properties and there relation
in between them. Using XAML, you
can create any kind of objects that
means graphical or non-graphical

What is the benefit of using a markup language for
designing a user interface?
Using a markup language such as
XAML, or even HTML, is
beneficial because it provides a
common medium for both
designers and developers.
Additionally, the markup
language allows for a declarative
approach for building
applications, which is often
easier to construct and maintain

Which files are automatically added to a new WPF
Application project?
App.xaml and Window1.xaml,
along with their associated code-
behind files. The former
represents the application as a
whole, whereas the latter
represents the primary window
of the application.

What is the purpose of the x:Name attribute in XAML?
The x:Name attribute allows you
to uniquely identify an instance
of an object defined in XAML.
The value of the x:Name
attribute can be referenced in the
associated C# or VB code

What is the difference between a Panel and a Decorator?
A Panel has a collection of
Children that it arranges
according to various rules, based
on the type of panel.
A Decorator, on the other hand,
has only one Child to which it
applies some additional set of
behavior.

What is the feature of silverlight 4?
Silverlight 4 is the current version at the
time of writing and it introduced a number
of new features, including :
Support for Google’s Chrome web
browser
Access to the user’s web cam and
microphone
Mousewheel input
Enhancements to existing controls, such as
the DataGrid
New controls, such as the RichTextBox
Enhanced data binding support
Managed Extensibility Framework support
WCF RIA services

What is an attached property?
An attached property is a
property that is declared by one
control and attached to another.
It allows the inclusion of
additional information with a
control for later use by an
external source.

Top 6 tips for job
interview

Tip 1: Do your homework
You'll likely be asked difficult questions during the interview.
Preparing the list of likely questions in advance will help you easily
transition from question to question.
Spend time researching the company. Look at its site to understand
its mission statement, product offerings, and management team. A
few hours spent researching before your interview can impress the
hiring manager greatly. Read the company's annual report (often
posted on the site), review the employee's LinkedIn profiles, and
search the company on Google News, to see if they've been

mentioned in the media lately. The more you know about a
company, the more you'll know how you'll fit in to it.
Ref material: jobguide247.info/job-interview-checklist-40-points
Tip 2: First impressions
When meeting someone for the first time, we instantaneously make
our minds about various aspects of their personality.
Prepare and plan that first impression long before you walk in the
door. Continue that excellent impression in the days following, and
that job could be yours.
Therefore:

• Never arrive late.
• Use positive body language and turn on your charm right from
the start.
• Switch off your mobile before you step into the room.
• Look fabulous; dress sharp and make sure you look your best.
• Start the interview with a handshake; give a nice firm press and
then some up and down movement.
• Determine to establish a rapport with the interviewer right from
the start.
• Always let the interviewer finish speaking before giving your
response.
• Express yourself fluently with clarity and precision.

Useful material: jobguide247.info/top-10-elements-to-make-a-
good-first-impression-at-a-job-interview
Tip 3: The “Hidden” Job Market
Many of us don’t recognize that hidden job market is a huge one
and accounts for 2/3 of total job demand from enterprises. This
means that if you know how to exploit a hidden job market, you can
increase your chance of getting the job up to 300%.
In this section, the author shares his experience and useful tips to
exploit hidden job market.

Here are some sources to get penetrating into a hidden job market:
Friends; Family; Ex-coworkers; Referral; HR communities; Field
communities; Social networks such as Facebook, Twitter…; Last
recruitment ads from recruiters; HR emails of potential recruiters…
Tip 4: Do-It-Yourself Interviewing Practice
There are a number of ways to prepare for an interview at home
without the help of a professional career counselor or coach or a
fee-based service.
You can practice interviews all by yourself or recruit friends and
family to assist you.

Useful material: jobguide247.info/free-ebook-75-interview-
questions-and-answers
Tip 5: Ask questions
Do not leave the interview without ensuring that you know all that
you want to know about the position. Once the interview is over,
your chance to have important questions answered has ended.
Asking questions also can show that you are interested in the job.
Be specific with your questions. Ask about the company and the
industry. Avoid asking personal questions of the interviewer and
avoid asking questions pertaining to politics, religion and the like.

Ref material: jobguide247.info/25-questions-to-ask-employers-
during-your-job-interview
Tip 6: Follow up and send a thank-you note
Following up after an interview can help you make a lasting
impression and set you apart from the crowd.
Philip Farina, CPP, a security career expert at Manta Security
Management Recruiters, says: "Send both an email as well as a
hard-copy thank-you note, expressing excitement, qualifications
and further interest in the position. Invite the hiring manager to

contact you for additional information. This is also an excellent
time to send a strategic follow-up letter of interest."
Ref material: jobguide247.info/top-8-interview-thank-you-letter-
samples
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