Web Service Interview

8/20/2019 Web Service Interview

1/28

Top 20 web services interview questionsand answers

Tell me about yourself?

1


2/28

This is probably the most asked

question in web services interview. It

breaks the ice and gets you to talk

about something you should be fairlycomfortable with. Have something

prepared that doesn't sound rehearsed.

It's not about you telling your life story

and quite frankly, the interviewer ust

isn't interested. !nless asked to do so,

stick to your education, career andcurrent situation. "ork through it

chronologically from the furthest back

to the present.

1


3/28

Define Web Service?

# web service is a kind of software that

is accessible on the Internet. It makesuse of the $%& messaging system and

offers an easy to understand, interface

for the end users.

1


4/28

What Can You Do for Us That Other CandidatesCan't?

"hat makes you unique Thiswill take an assessment of

your e(periences, skills and

traits. )ummari*e concisely+

I have a unique combination

of strong technical skills, and

the ability to build strongcustomer relationships. This

allows me to use my

knowledge and break down

information to be more user-

friendly.

1


5/28

Give me an examle of real !eb service?ne e(ample of web services is I/%

"eb )ervices browser. 0ou can get it

from I/% #lphaworks site. This

browser shows various demos related to

web services. /asically web servicescan be used with the help of )#,

")2&, and !22I . #ll these, provide a

plug-and-play interface for using web

services such as stock-quote service, a

traffic-report service, weather service

etc.

1


6/28

"o! you define !eb service rotocol stac#?It is basically set of various

protocols that can be used to e(plore

and e(ecute web services. The entirestack has four layers i.e. )ervice

Transport, $%& %essaging, )ervice

2escription and )ervice 2iscovery.

1


7/28

Can you define each of these layers of rotocolstac#?

The )ervice Transport layer transfer

messages between different

applications, such as HTT, )%T,

3T, and /locks 4(tensible 4(change

rotocol 5/446. The $%&

%essaging layer encodes messages in

$%& format so that messages can be

understood at each end, such as

$%&-78 and )#. The )ervice

2escription layer describes the user

interface to a web service, such as

")2&. The )ervice 2iscovery layer

centrali*es services to a common

registry and offer simple publish

functionality, such as !22I.

1


8/28

Discuss various aroaches to develo SO$%based !eb service?

"e can develop )# based webservice with two different types of

approaches such as contract-first and

contract-last. In the first approach, the

contract is defined first and then the

classes are derived from the contract

while in the later one, the classes aredefined first and then the contract is

derived from these classes.

1


9/28

&ame bro!ser that allo!s access to !ebservice?

9ava)cript $mlHttp7equest obect is

required to access web service via

browsers. The browsers that support this

obect are Internet 4(plorer, )afari and

%o*illa-based browsers like 3ire3o(.

1


10/28

"o! can you document !eb service?"eb services are contemplated as self-

documenting because they provideentire information regarding the

available methods and parameters used

for $%& based standard, known as

")2&. ne can also provide more

information to e(plain web services

via their own "eb)ervice and"eb%ethod attributes.

1


11/28

What are the situations !hen !e need $S%(&)T!eb services?

#).:4T web services are used whenone need to implement three tier

architecture in a web service. It allows

handy ways to use middle tier

components through internet. The main

advantage of .:4T "eb services is that

they are capable enough to communicateacross firewalls because they use )#

as transport protocol.

1


12/28

Differentiate bet!een !eb services CO*+$ andDCO,?

"eb services transfer;receive messagesto;from application respectively, via HTT

protocol. It uses $%& to encode data.

87/# and 28% transfer;receive

messages to;from application respectively,

via non-standard protocols such as II

and 78.

1


13/28

Can you tell fe! benefits of !eb services?The biggest advantage of web

service is that is supported by

wide variety of platforms.%oreover, in near future, web

services may spread its boundary

and enhance new methods that

will provide ease to clients. The

enhancement will not affect the

clients, even if they offer oldmethods and parameters

1


14/28

Can you name some standards used in !ebservices?

The standards used in web services are

")2& 5used to create interface definition6,

)# 5used to structure data6, HTT

5communication channels6, 2I)8 5used to

create discovery documents6 and !22I

5used to create business registries6.

1


15/28

)xlain in brief !hat D-SCO is?2I)8 means discovery. It groups the list

of interrelated web services. The

organi*ation that provides web services,issues a 2I)8 file on its server and that

file contains the links of all the provided

web services. This standard is good when

client knows the company already. #lso it

can be used within a local network as well.

1


16/28

)xlain in brief !hat UDD- is?!22I 5!niversal 2escription,

2iscovery, and Integration6 provides

consolidated directory for web serviceson the internet. 8lients use !22I to

find web services as per their business

needs. It basically hosts the web

services from various companies. In

order to share web services, you need

to publish it in !22I.

1


17/28

)xlain the (&)T !eb services suorted datatyes?

:et web services uses $%&-based

standards to transfer;receive

information. Thus, .:4T web services

can only works with data types known

by $%& schema standard. &ike

3ile)team, 4ventlog etc. are not

recogni*ed by the $%& schema

standards and hence, not supported in

web services.

1


18/28

"o! a (&)T !eb service is consumed?)ince we know that web services are

constructed on $%& standards.Therefore, clients need to have

complete understanding of $%&-based

messages to interchange messages.

8lients can communicate with web

services through .:4T framework that

offers pro(y mechanisms. These pro(ymechanisms have detailed information

regarding data sharing within web

services that can be easily used by the

clients.

1


19/28

Differentiate bet!een (&)T Web Services and(&)T *emotin.?

#s far as protocol is concerned, .:4T

"eb )ervice uses HTT, while, .:4T

7emoting uses any protocol i.e.

T8;HTT;)%T. "hen it comes to

performance, .:4T 7emoting is

comparatively, faster than.:4T "eb

)ervice. #lso, as .:4T "eb )ervices

are hosted via II), therefore, it is far

more reliable than the .:4T 7emoting.

1


20/28

)xlain fe! disadvanta.es of *esonseCachin.?

7esponse 8aching is useless or

incompetent when method accepts

e(tensive amount of values because

caching means to store lot of

information. #lso, if the method

depends on e(ternal source of

information, and that are not provided

within the parameters then such

methods are bypassed.

1


21/28

!hat is rest rotocol ?74)T stands for 7epresentational )tate

Transfer. 5It is sometimes spelled 7e)T.6

4)T is a lightweight alternative tomechanisms like 78 57emote rocedure

8alls6 and "eb )ervices 5)#, ")2&, et

al.6. &ater, we will see how much more

simple 74)T is.

2espite being simple, 74)T is fully-

featured< there's basically nothing you can

do in "eb )ervices that can't be done with a74)Tful architecture.

74)T is not a standard. There will never

be a "=8 recommendation for 74)T, for

e(ample. #nd while there are 74)T

programming frameworks, working with

74)T is so simple that you can often roll

your own with standard library features inlanguages like erl, 9ava, or 8>.

1


22/28

To / tis for 0ob intervie!

Ti 12 Do your home!or#

1


23/28

0ou'll likely be asked difficult questions

during the interview. reparing the list of

likely questions in advance will help you

easily transition from question to question.

)pend time researching the company. &ook

at its site to understand its mission statement,

product offerings, and management team. #

few hours spent researching before your

interview can impress the hiring manager

greatly. 7ead the company's annual report

5often posted on the site6, review theemployee's &inkedIn profiles, and search the

company on ?oogle :ews, 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.

Ti 32 4irst imressions

1


24/28

"hen meeting someone for the first time, we

instantaneously make our minds about various aspects of

their personality.

repare and plan that first impression long before you

walk in the door. 8ontinue that e(cellent impression in

the days following, and that ob could be yours.Therefore+

• :ever arrive late.

• !se positive body language and turn on your

charm right from the start.

• )witch off your mobile before you step into the

room.

•

&ook fabulous< dress sharp and make sure you look your best.

• )tart the interview with a handshake< give a nice

firm press and then some up and down movement.

• 2etermine to establish a rapport with the

interviewer right from the start.

• #lways let the interviewer finish speaking before

giving your response.• 4(press yourself fluently with clarity and

precision.

Ti 52 The 6"idden7 8ob ,ar#et

1


25/28

%any of us don@t recogni*e that hidden ob

market is a huge one and accounts for A;=

of total ob demand from enterprises. This

means that if you know how to e(ploit a

hidden ob market, you can increase yourchance of getting the ob up to =BBC.

In this section, the author shares his

e(perience and useful tips to e(ploit hidden

ob market.

Here are some sources to get penetrating

into a hidden ob market+ 3riends< 3amily<

4(-coworkers< 7eferral< H7 communities<

3ield communities< )ocial networks such

as 3acebook, TwitterD< &ast recruitment

ads from recruiters< H7 emails of potentialrecruitersD

Ti 92 Do:-t:Yourself -ntervie!in. %ractice

1


26/28

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.

0ou can practice interviews all by

yourself or recruit friends and family to

assist you.

Ti ;2 $s#


27/28

2o not leave the interview without

ensuring that you know all that you

want to know about the position. nce

the interview is over, your chance to

have important questions answered hasended. #sking questions also can show

that you are interested in the ob. /e

specific with your questions. #sk about

the company and the industry. #void

asking personal questions of the

interviewer and avoid asking questions pertaining to politics, religion and the

like.

Ti /2 4ollo! u and send a than#:you note

1


28/28

3ollowing up after an interview can

help you make a lasting impression and

set you apart from the crowd.

hilip 3arina, 8, a security career

e(pert at %anta )ecurity %anagement7ecruiters, says+ )end both an email as

well as a hard-copy thank-you note,

e(pressing e(citement, qualifications

and further interest in the position.

Invite the hiring manager to contact you

for additional information. This is alsoan e(cellent time to send a strategic

follow-up letter of interest.

1

Date post:	07-Aug-2018
Category:	Documents
Upload:	sonu-kumar
View:	216 times
Download:	0 times

Web Service Interview

Documents