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Interview Questions And Answers

Best Angular js Interview Questions 2018

Author: Sharad          Posted Date: May 02, 2018    Category: JavaScript/VBScript     Points: 40

Here is list of 10 Best Angular Js Interview questions and answers.

1. What is Angular JS?

AngularJS is a JavaScript framework that is used for making rich, extensible web applications. It runs on plain JavaScript and HTML, so you don't need any other dependencies to make it work.AngularJS is perfect for Single Page Applications (SPA). It is basically used for binding JavaScript objects with HTML UI elements.

2. Explain the architecture of AngularJS?

AngularJS is architecture on 3 components. They are

The Template (View)
The Scope (Model)
The Controller (Controller)
AngularJS extends HTML attributes with Directives and binds data to HTML with Expressions.

3. What is the Template in AngularJS?

The template is the HTML portion of the angular app. It is exactly like a static HTML page, except that templates contain additional syntax which allows data to be injected in it in order to provide a customized user experience.

4. What is the scope in AngularJS?

The scope is the object that represents the "model" of your application. It contains fields that store data which is presented to the user via the template, as well as functions which can be called when the user performs certain actions such as clicking a button.

5. What is the controller in AngularJS?

The controller is a function which generally takes an empty scope object as a parameter and adds to it the fields and functions that will be later exposed to the user via the view.

6. Explain Directives in AngularJs?

AngularJS directives are extended HTML attributes with the prefix ng-
The 3 main directives of angular js are

ng-app:- directive is used to flag the HTML element that Angular should consider to be the root element of our application. Angular uses spinal-case for its custom attributes and camelCase for the corresponding directives which implement them.
ng-model:- directive allows us to bind values of HTML controls (input, select, textarea) to application data. When using ngModel, not only change in the scope reflected in the view, but changes in the view are reflected back into the scope.
ng-bind:- directive binds application modal data to the HTML view.
7. List some tools for testing AngularJS applications?

For testing AngularJS applications there are certain tools that you should use that will make testing much easier to set up and run.


Karma is a JavaScript command line tool that can be used to spawn a web server which loads your application's source code and executes your tests. You can configure Karma to run against a number of browsers, which is useful for being confident that your application works on all browsers you need to support. Karma is executed on the command line and will display the results of your tests on the command line once they have run in the browser.

Karma is a NodeJS application and should be installed through NPM/YARN. Full installation instructions are available on the Karma website.


Jasmine is a behavior-driven development framework for JavaScript that has become the most popular choice for testing AngularJS applications. Jasmine provides functions to help with structuring your tests and also making assertions. As your tests grow, keeping them well structured and documented is vital, and Jasmine helps achieve this.

Jasmine comes with a number of matches that help you make a variety of assertions. You should read the Jasmine documentation to see what they are. To use Jasmine with Karma, we use the karma-jasmine test runner.


AngularJS also provides the ngMock module, which provides mocking for your tests. This is used to inject and mock AngularJS services within unit tests. In addition, it is able to extend other modules so they are synchronous. Having tests synchronous keeps them much cleaner and easier to work with. One of the most useful parts of ngMock is $httpBackend, which lets us mock XHR requests in tests and return sample data instead.


8. How do you share data between controllers in AngularJs?

We can share data by creating a service,
Services are easiest, fastest and cleaner way to share data between controllers in AngularJs.
There are also other ways to share data between controllers, they are

Using Events
$parent, nextSibling, controllerAs
Using the $rootScope
9. Explain AngularJS digest cycle?

AngularJS digest cycle is the process behind Angular JS data binding.
In each digest cycle, Angular compares the old and the new version of the scope model values. The digest cycle is triggered automatically. We can also use $apply() if we want to trigger the digest cycle manually.

10. What is internationalization in Angularjs?

Internationalization is a way to show locale-specific information on a website.It is used to create multilingual language websites.
Read 80+ AngularJS interview Questions and Answers from https://www.onlineinterviewquestions.com/angular-js-interview-questions/

Coreless Servo Motors factory

Author: momu131          Posted Date: March 29, 2018    Category: ADO.Net     Points: 40

Passionate salesman help you to know our products and company.Professional inspector check rides quality before delivery.
Strict test before shipment .
When you got the goods, test them, and give me a feedback.
Help you to choose the right DC dear motor for your application.
Small fluctuation of speed, fluctuation is normally controlled within 2%.


Sandard Parameters:
1630 Series
1630 Series 369121824
Rated Voltage 369121824V
Armature Resistance
Max Output 1.360.931.341.441.871.85W
Max Effect 746771717372%

No-load Speed 120001050011500130001380014400RPM
No-load Current 0.080.0690.0620.060.0570.056A
Stall Torque 4.333.394.464.235.164.91mNm
Friction Torque

Speed Constant 4070180013001110779611rpm/V
Back Electromotive Force Constant 0.2460.5550.7670.9051.281.64mV/rpm
Torque Constant 2.355.37.338.6412.315.6mNm/A
Current Constant 0.4260.1890.1360.1160.0820.064A/mNm

Speed/Torque Slope 277031002580307026702930rpm/mNm
Rotor Inductance 8520040075012003000?H
Mechanical Time Constant 192219191924ms
Rotor Moment Of Inertia 0.650.680.70.590.680.78gcm2
Angular Acceleration 665063727663.103rad/s2

(Remarks:Above the specifications just for your review only,customized according to your need.)
XBD-1630 Applications
Remote-control-carTattoo machineElectric eyebrow knifeDental-Hand-ToolsBeauty-equipment
Tattoo-machineElectric engraved lipsElectrical-toolsAutomatic-curtainsRobot
can combined with gear/ encoder/ gearbox/gearbox+encoder

B16 encoder
PS: B16 series of magnetic components encoder is developed for medical device products, with speed and direction of signal output,
5V power supply compatible with the TTL level, two-channel, 24-line products are now mass production.
General parameters
Power supply voltage rangeVccV
3.6 - 20
Output lowVomVIo=-15mA?500
Output current limitImmA
Speed output pulse numberNpPRT
Operating temperature rangeTa?
-40 - +60
Storage temperature rangeTstg?
-50 - +80
Working parameters
Rated supply voltageVccV
Rated supply currentIcmA
Load ResistanceRLk?
Speed output delay timeTd?SThe direction output is changed after the speed output delay5
Chopping frequencyFcKHz
Output rise timeTr?S
Output the fall timeTr?S

Working parameters
Adaptation of B16 motor parameters
Serial numberProjectUnitValue
1Rated voltageV1212
2No-load currentmA25100
3No load speedrpm1150011600
4Stall currentmA7001080
5Armature resistance?17.111.1
6Speed constantrpm/V965974
7Maximum allowable speedrpm1400012000
8Ambient temperature range? -20 ~ +65

Adaptation 16 planetary reducer parameters
Serial numberProjectUnitValue
2Reduction ratio
3Maximum continuous output torqueNm0.150.20.3
4Maximum transfer efficiency%908173
6No-load average empty back°2.52.53
7Gearbox lengthmm16.820.424

Pin definition


Structure diagram

Payment of terms
1: How to ship to us?
We will ship the goods to you according to the DHL or UPS or FEDEX etc account you provide.
2: How to confirm the payment?
A: We accept payment by T/T, PayPal, the other payment ways also could be accepted,Please contact us before you pay by the other payment ways. Also 30-50% deposit is available, the balance money should be paid before shipping.
3: Can you supply me samples?
A:Yes,we will give you samples,if you need,but you have to pay to freight charge and samples fee
4: What's the payment term?
A:For small amount,we accept 100% payment via Paypal
For large amount,we accept TT.
5: How do you control the quality?
A:We have QC team comply with TQM,each step is in compliance to the standards.
6: When can I get the price for micro dc gear motor ?
A: We usually quote micro dc gear motor within 24 hours after we get your inquiry. if you are very urgent to get the price, please call us or tell us in your email so that we will regard your inquiry priority.
7:Can you make my customised designed products?
A: Yes, we can make the micro dc gear motor according to customer's request, like the size, color, logo and other details.
Coreless Servo Motors factory

Lost Wax Casting manufacturers

Author: momu131          Posted Date: March 29, 2018    Category: ADO.Net     Points: 40

1. Parts description:Ceramic Shell investment casting
2. Casting material: Cast Steel ASTM A216 Grade WCC
3. Parts weight: 9.5KG
4. Design software: CAD,PRO/E,SolidWorks
5. Casting process: Lost wax Casting
6. Heat treatment:Normalizing
7. Machining: CNC Lathe Machining
8. Surface finishing: As cast,and Zinc Plating, and powder coating/Hot dip Galvanizing is available
9. Package: Fumigation-free palletLost Wax Casting manufacturers

Polycarbonate Solid Sheet

Author: momu131          Posted Date: March 29, 2018    Category: ADO.Net     Points: 40

Polyvalley diffusion PC sheets can refract, reflect or scatter the light between additives and resins so that to get the diffusion effect. The diffusion sheet also have general PC good properties as light weight, good impact resistance, flam retardancy, sound insulation, etc. and widely be used for advertising screen, auto vending machine, lamp house, exciter lamp, and so on.
Universal solid sheets overview:
Polyvalley PC sheets are flat with excellent physical and mechanical properties. Superior shock resistance as well as high elasticity makes them almost unbreakable. The PC solid sheet can be as clear as glass, but the density of PC is only 50% of glass, and is much more solid than glass. This is very important when high safety, long life expectancy and good light transmission are needed. The external side of Polyvalley PC sheet is coated with U.V. protection (can be on both sides if required) warranting resistance to aging due to atmospheric agents and UV rays. Polyvalley PC solid sheets are offered with 10 years warranty.
Polyvalley offers various special PC solid sheet such as diffusion sheet, frosted sheet, anti-scratch, ant-static,anti-fog sheets etc.
Our promise: As a professional Polycarbonate products manufacturer, we promise that all of our products are made of 100% new BAYER or GE raw material. And we give 10-year quality warranty
Typical specifications:
Very strong impact resistance, almost be unbreakable
Be cold bending, can be installed to any design free formation
Very high light transmission as glass
Good heat insulation
Light gravity weight, very suitable for installation
Double UV protection
PC solid sheets installation:
1) 10cm masking film around the sides should be taken off before installation. Only neutral glue could be used for sealing.
2) 5-10mm space should be kept on the connection part of two sheet in case of heat expansion. The space distance should be changed accordingly to different sheet length.
3) Masking film should be taken off immediately after finish installation
4) Expansion holes(1.5 times bigger than screw) should be drilled. Screw is banned to used for drilling the sheet directly
5) Screw can not be locked too tight in case of sheet breakage.
6) The UV side must be faced to the Sun.Polycarbonate Solid Sheet

Laptop Ac Adapter 120W 19.5v 6.15a For HP manufacturers

Author: momu131          Posted Date: March 29, 2018    Category: ADO.Net     Points: 40

Our History
1.2009, Guangzhou Japter Electric Technology was established.
2.2010, Research and Development department was established.
3.2012, domestic turnover exceeded 10 million.
4.2013, employees expanded to 30 people and the factory area expand up to 1500 square.
5.2015, foreign trade sales team was established.
6.2016, the brand of "Japter" was established. And the annual turnover was exceeding 15 million.
7.2017, at the first half of 2017, the output value had reached 10 million. And employees have expanded to 50 people.
8.To be continue.
Our Factory
Established in 2009, Guangzhou Japter Electric Technology Co., Ltd is a professional manufacturer and exporter that is concerned with the design, development, production and selling of laptop adapter, universal power adapter, switch power adapter, etc. We are located in Guangzhou, with convenient transportation access. All of our products comply with international quality standards.
Our well-equipped facilities and excellent quality control throughout all stages of production enables us to guarantee total customers' satisfaction. Besides, we have received certifications of CE, FCC, ROHS, IEC, MSDS, etc.
As a result of our high quality products and outstanding customer service, we have gained a global sales network reachingUK,Brazil,Mexicoand 20 other countries and regions.
Japtrer will initiate the second phase of our development strategy. Our company regards "Quality First, Service Best, Integrity Prime, Client Focus" as our tenet. We hope to cooperate with more customers for mutual development and benefits. We welcome potential buyers to contact us.
Our Product
Laptop adapter, Universal power adapter, LED/LCD power adapter, switch power adapter
Product Application
laptop, notebook, CCTV camera, Router, Audio system, etc.
Our Certificate
Production Equipment
1. AI Panasert 2. Long leg wave-soldering; 3. Angle milling cutter 4. Big Wave-Soldering;
5. Electronic load instrument 6. Burn-in rack 7. Comprehensive test instrument, etc.
Production Market
South America, Middle East,UKand Southeast Asia, etc.
Our service
Pre- sales services:
1.Quick response, all of inquire will be replied within 24 hours.
2.Professional advice for your any questions. (Such as shipping, package, price, product details)
3.Accept customize label, customize package, etc.
4.Accept print customer's logo on adapter case, DC cable, label or package.
5.Free sample is accepted.
After- sales service:
1.Shipment and sample quality tracking includes lifetime.
2.Any small problem happening in our product will be solved at the most prompt time. We always offer relative technical support.
3.Quality control: a) Before the order can be confirmed finally, we would strictly check the material step by step. b) Our sales team as an order follower would trace every phase of production from the beginning. c) Four strict tests for all products before packing. Such as Burn-In Test, Hi-Pot Test and electrical performance test, etc.
4.12 months warranty for all products. When find the quality problems, please state the problems in details. If possible, combine with the pictures for reference. If we made the quality problems, we will replenish the defaults parts immediately and you don't need to send back them to usLaptop Ac Adapter 120W 19.5v 6.15a For HP manufacturers

Plastic Waterproof Box factory

Author: momu131          Posted Date: March 29, 2018    Category: ADO.Net     Points: 40

ABS waterproof plastic junction box
Specifications of waterproof enclosure
Place of originGuangdong, China (mainland)
Model No.HF-H-3
ColorGray or Custom
Protect levelIP65
Lead time7-15 days after get payment
Payment termT/T, PayPal, Western Union, L/C, VISA, D/A, D/P etc.

TypeWaterproof plastic enclosure with frame
Port: Shenzhen
Supply ability: 1000 pieces/day
Payment terms: T/T, Western Union, PayPal, L/C
Packaging: Standard export packing
Delivery time: 15-25 days, depends on quantity
MOQ: 1 piece, welcome mass order
Price: Good price available
High quality service:
ItemProfessional Service
1 Provide OEM/ODM service
2Provide professional plastic mould design and manufacturing service
3Provide plastic parts mould / printing/ painting service
4Provide plastic parts assembly service
5Provide plastic parts package service
6Provide After-Sales service
5. Competitive Price
6. Earth-friendly Products
7. In a Variety of Design
8. Small Order Acceptable
The picture of the ABS waterproof plastic junction box
Company Information:
Related Product ShowPlastic Waterproof Box factory

16mm Metal Key Switch

Author: momu131          Posted Date: March 29, 2018    Category: ADO.Net     Points: 40

Company Profile:
Jinhong electrical appliance CO.,LTD is a Science and Technology Industry factory, we always dedicated to supply the best service to domestic and international famous relay company. The factory own around 30000 squarmeter, there are more than 500 workers,30% of them are technical engineer who work for new product R&D and ooling making. Our major product Relay,Relay socket and accessories and Push button, all the product are widely used for electric appliance, machine and industrial automation equipment,which has sold to Korea,America,brazil,europe countires and area.

Quality is the first important factor in the enterprise.Our factory complied with ISO90001 quality contol system, the product have got UL,CSA,TUV,VDE ,CE approvals. Moreover the product completely adopt ERP manage system, to control every step of production.Jinhong have very advanced tooling making center, there for enjoys a sound reputation for its quality products and outstanding performance.
Environment :

The implementation of brand is our business development goal we import the internationalization of quality management system adhere to every detail and link to be strict in one's demands and refine on efforts to achieve product quality standardization and management system make the brand for quality and rise above the common herd
Manufacturing stren:
Own international advanced production machine,strictly according with national (GB) and international (IEC) standard.Focus on product research and the talent tech person.Now has a completlt set of product research and the core technology of the manufacture.

The quality policy is" Customer requirement as the first, basic of the production management,continuously improve the quality system.


corporate culture:
To create attractive, the pursuit of
a dream In order to achieve "enterprise"
and "business philosophy," Must
create a healthy, positive, Dynamic
corporate culture 16mm Metal Key Switch

China Granite Window surround

Author: momu131          Posted Date: March 29, 2018    Category: ADO.Net     Points: 40

About Us Based in Xiamen of China, Current Stone have a strong team working together to make sure our clients are happy with our products and customer service.Current Stone is a well established company and specializes in high quality cut stone in both of granite and quartz.For granite, we supply a large selection of granite cobble, paving slab, curb and our rich experience of customized and tailed products could give our clients advantage on any commercial projects or perfect personal house.For quartz, we are single-mindedly devoted to the best quality of countertops for any of our projects no matter in a hotel or a single house.We value our good reputation and quality-oriented is what we focus on all the time. With our experienced engineer, professional craftsmen, strict quality control and efficient management system, we assure all our clients of top quality products, punctual delivery and good after-sale service. We'll be more than happy to be with you for better business.China Granite Window surround

Metal Machining price

Author: momu131          Posted Date: March 29, 2018    Category: ADO.Net     Points: 40

Part name: Guide rail processing
CNC Machining or Not:
Yes, we do CNC machining on guide rail parts, aluminium parts, steel parts, aluminium profiles and other metal parts.
Type: CNC machining, such as CNC drilling, milling, turning, tapping, chamfering, sawing and others.
Material Capabilities:
Aluminum, aluminium alloy, aluminium profiles, Stainless Steel, Steel, Brass, Hardened Metals, Precious Metals.
Item: Aerospace structural parts machining and other metal processing
Finish: Anodizing / polishing /Coating painting and others.
Sample: Be available, made in 1-3 days, customized by requested.
Shipment: By DHL, UPS, or by other express, Sea Shipment, etc.
Processing Way: CNC metal machining center, do Drilling, Tapping, and Chamfering, etc together.
Packaging: Packing in Cartons, then in Wooden Case, or as required.
Delivery: Delivery days is generally customized machined aluminium parts.
Metal parts and our machining show:Metal Machining price

Customized PP Sanding Sheet

Author: momu131          Posted Date: March 29, 2018    Category: ADO.Net     Points: 40

Yangzhou Chengsen Plastics Co.,Ltd. is located in Jiangsu province, China, specilizing in the production of widely used plastic sheet(ABS sheet, HIPS sheet, PP sheet, PVC sheet, PE sheet and functional composite sheet). Our products are widely used for Automobile internal decorative panel, Electric appliance panel, advertising, motors, interior of vehicles, luggage, furniture, cabinet, sanitaryware industry, building industry (doors, conservatories), kitchen ware, etc.

We own several imported automatic extrusion lines with a large annual output. Our products are sold both at home and abroad, Haier, Walmart are our representative customers.
Why choose us:
1. Professional team: Complete production line from raw material to finished product and experienced sales department.
2. Quality guarantee: There is a perfect quality assurance system to ensure the products meet customer's requirements.
3. Multi service: We are capable to develop our own products with proper workmanship and so as to produce the products with customized according to provided samples or molds.
4. certification show
We shall always be very pleased to enter into business relations with you on the basis of equality and mutual benefit.Customized PP Sanding Sheet
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