Most sensible 80+ LWC Interview Questions and Solutions for 2024

40+ LWC Interview Questions and Solutions

1. Extend LWC.

The time period stands for Lightning Internet Parts.

2. How is LWC other from Air of secrecy?

LWC-based lightning parts are constructed the use of internet stack equipment, while aura-based lightning parts are constructed the use of HTML5 and JavaScript equipment.

3. Which corporate offered LWC to the global instrument marketplace?

Salesforce offered LWC to the global instrument marketplace.

4. What do you imply through Salesforce Lightning?

Salesforce Lightning is a component-based framework, for Salesforce App construction. Its primary function is to simplify the method of construction for individuals who should not have right kind revel in in programming.

5. Extend LCF.

The time period LCF stands for Lightning Element Framework.

6. What’s the usage of a Lightning Element Framework?

Usually phrases, a Lightning Element Framework is a user-interface framework this is used to expand dynamic internet packages for each cellular and desktop customers.

7. In what number of tactics can lightning parts be made?

There are two (2) tactics during which lightning parts can also be made. They’re 

1. Air of secrecy Parts style, and 
2. Lightning Internet Parts style.

8. Point out probably the most parts of Salesforce Lightning.

Listed here are probably the most parts of Salesforce Lightning. They’re

1. Lightning Trade
2. Lightning Element Framework
3. Visible Construction Gear
4. Lightning Enjoy and
5. Lightning Design Gadget

9. Point out probably the most sorts of occasions of Salesforce Lightning parts.

There are 3 various kinds of occasions of Salesforce Lightning parts. They are

1. Software Match 
2. Gadget Match and 
3. Element Match

10. What’s LWC?

The time period LWC stands for Lightning Internet Parts. It’s used to expand customized HTML components with the assistance of JavaScript and HTML equipment. 

11. Do you assume Air of secrecy Internet Parts and Lightning Internet Parts can coexist in combination?

Sure, each Air of secrecy Lightning parts and Lightning Internet Parts can coexist in combination.

12. What does an element package include?

Listed here are probably the most factor bundles of a lightning factor:

1. Taste
2. Renderer
3. Documentation
4. Helper and 
5. Controller

13. What’s the usage of Visible Construction equipment?

Those Visible Construction equipment supply drag-and-drop options making app construction faster and more straightforward.

14. What are the other Lightning web page sorts?

There are various kinds of Lightning web page sorts to be had. A few of them are offered right here:

1. Embedded Provider Web page
2. House Web page
3. App Web page and 
4. Report Web page

15. What are some great benefits of the use of Lightning Element Framework?

Listed here are probably the most advantages of the use of the Lightning Element Framework.

1. It supplies out-of-the-box parts
2. Wealthy Customized Element Ecosystem
3. Speedy Construction
4. Software-aware and Pass Browser Compatibility

16. Listing out the collection of Software match propagation.

This is the collection of Software match propagation.

1. Match fired
2. Seize Segment
3. Bubble Segment and 
4. Default Segment

17. Describe the report construction of Lightning Internet Parts.

This is the report construction of Lightning Internet Parts.

1. myComponent.html
2. myComponent.js
3. myComponent.js-meta.xml
4. myComponent.css
5. myComponent.svg

18. What are the foundations to be adopted whilst naming information?

Listed here are probably the most laws which might be to be adopted whilst naming a report. They’re

1. The names of the report should start with a lowercase letter.
2. The identify of the report should include most effective alphanumeric or underscore characters.
3. The identify of the report should be distinctive within the namespace.
4. The identify of the report should now not have whitespaces in it.
5. The identify of the report will have to now not finish with an underscore. 
6. The identify of the report will have to now not include two consecutive underscore      characters.
7. The identify of the report will have to now not include a hyphen. 

19. iterate throughout the record in LWC?

There are two alternative ways to iterate throughout the record in LWC. 

1. Use for: every
2. Iterator

20. Extend SLDS.

The time period SLDS stands for Salesforce Lightning Design Gadget.

21. What’s the usage of the Salesforce Lightning Design Gadget?

Salesforce Lightning Design Gadget is used to expand internet packages with nice lightning revel in, with out writing a unmarried line of code in CSS3.

22. Is there any risk of getting more than one cord strategies in Lightning Internet Element?

Sure, there’s a risk of getting greater than two cord strategies in Lightning Internet Parts.

23. What’s renderedCallback() in Lightning Internet Parts?

renderedCallback() is a serve as in Lightning Internet Parts, this is used to hold out a good judgment as soon as an element has finished the rendering section.

24. Provide an explanation for extra about Salesforce Lightning Design Gadget.

The Salesforce Lightning Design Gadget is a CSS3 framework that aids the builders to create a perfect lightning revel in the use of the font, colour palettes, icons, and so forth.

25. What’s the usage of @cord in LWC?

Wiring is an invaluable assets in Lightning Internet Parts. When the wiring provider provisions information, then rendering of the factor happens. It’s used to specify a cord adapter.

26. Listing out the equipment found in Salesforce Lightning.

Listed here are probably the most equipment found in Salesforce Lightning.

1. Lightning Element Framework
2. Lightning Attach
3. Lightning App Builder
4. Lightning Schema Builder and 
5. Lightning Procedure Builder

27. What’s Lightning Procedure Builder?

Lightning Procedure Builder is among the equipment found in Salesforce Lightning. This can be a user-interface instrument used to create visualizations and automate processes. 

28. Extend SFDX.

The time period SFDX stands for Salesforce Developer Enjoy.

29. What’s the usage of Salesforce Developer Enjoy?

This Salesforce Developer Enjoy is often referred to as SFDX or simply DX. This can be a set of equipment which might be used to support the developer’s revel in of operating upon the platform.

30. Which way is named when each factor is attached or when the reactive houses have modified?

The @cord way is named mechanically when each factor is attached or when the reactive houses are modified.

31. State whether or not the given observation is correct or false?

Remark: The Information returned through the crucial apex strategies is immutable.

False, the crucial apex way returns the information which is mutable.

32.  State whether or not the given observation is correct or false?

Remark: Lightning Internet Parts paintings sooner than Air of secrecy parts.

True, the Lightning Internet Parts paintings sooner than Air of secrecy parts. 

33. Why does LWC paintings sooner than Air of secrecy parts?

In most cases, the lightning internet parts paintings sooner than air of mystery parts. It is because because of the absence of an abstraction layer, LWC is a light-weight framework constructed the use of internet stack equipment corresponding to HTML and JavaScript. 

34. How do Lightning Internet parts keep in touch with Air of secrecy parts?

There’s a risk that Air of secrecy parts keep in touch with Lightning Internet Parts with the assistance of Public APIs and Occasions. 

35. State whether or not the given observation is correct or false?

Remark: Lightning Internet Parts can also be embedded inside of Air of secrecy Parts.

True, Lightning Internet Parts can also be embedded inside of Air of secrecy Parts while the opposite can’t occur. 

36. Point out some disadvantages of Lights Internet Parts.

Listed here are probably the most disadvantages of the use of Lightning Internet Parts. They’re

1. It does now not toughen the LEX console.
2. LWC does now not supply two-way binding
3. LWC restricts using Electronic mail templates and so forth.