Forms & Input Handling Interview Questions
Comprehensive forms & input handling interview questions and answers for Vue.js. Prepare for your next job interview with expert guidance.
Questions Overview
1. What is v-model in Vue.js?
Basic2. How do you handle form submission?
Basic3. What are form input modifiers?
Basic4. How do you handle checkbox inputs?
Basic5. How do you handle radio inputs?
Basic6. How do you work with select elements?
Basic7. What is form validation?
Basic8. How do you handle file inputs?
Basic9. How do you reset form inputs?
Basic10. What are computed properties in forms?
Basic11. How do you implement custom form controls?
Moderate12. How do you handle form validation libraries?
Moderate13. How do you implement dynamic forms?
Moderate14. How do you handle form state management?
Moderate15. How do you implement form wizards?
Moderate16. How do you handle form arrays?
Moderate17. How do you implement form accessibility?
Moderate18. How do you handle form error states?
Moderate19. How do you implement form testing?
Moderate20. How do you implement advanced form patterns?
Advanced21. How do you handle form optimization?
Advanced22. How do you implement form security?
Advanced23. How do you handle form internationalization?
Advanced24. How do you implement form monitoring?
Advanced25. How do you handle form architecture?
Advanced26. How do you implement form documentation?
Advanced27. How do you handle form deployment?
Advanced28. How do you implement form testing strategies?
Advanced29. How do you handle form migrations?
Advanced1. What is v-model in Vue.js?
Basicv-model creates two-way data binding between form inputs and state. Works with input, textarea, select elements. Supports modifiers like .lazy, .number, .trim. Automatically handles different input types.
2. How do you handle form submission?
BasicUse @submit.prevent for form submission. Access form data through refs or v-model. Handle validation before submission. Support async submission. Implement loading states.
3. What are form input modifiers?
BasicModifiers customize input behavior: .lazy for change events, .number for numeric conversion, .trim for whitespace removal. Can be chained. Example: v-model.lazy.trim.
4. How do you handle checkbox inputs?
BasicUse v-model with boolean or array values. Support multiple selections. Handle value binding. Work with true-value/false-value attributes. Support checkbox groups.
5. How do you handle radio inputs?
BasicUse v-model with single value binding. Handle radio groups. Support value attribute. Work with dynamic values. Implement radio button components.
6. How do you work with select elements?
BasicUse v-model for single/multiple selection. Handle option groups. Support dynamic options. Work with value binding. Implement custom select components.
7. What is form validation?
BasicValidate form inputs before submission. Handle validation rules. Display validation errors. Support custom validation. Implement validation strategies.
8. How do you handle file inputs?
BasicUse input type='file'. Access files through event.target.files. Handle file upload. Support multiple files. Implement file validation.
9. How do you reset form inputs?
BasicUse form.reset() or set model values to initial state. Handle form clearing. Support partial reset. Implement reset strategies.
10. What are computed properties in forms?
BasicUse computed for derived form values. Handle complex validation. Support dependent fields. Implement computed validation. Handle computed states.
11. How do you implement custom form controls?
ModerateCreate components with v-model support. Handle value prop and input events. Support validation. Implement custom behavior. Handle component state.
12. How do you handle form validation libraries?
ModerateIntegrate validation libraries like Vuelidate or VeeValidate. Handle validation rules. Support async validation. Implement validation messages.
13. How do you implement dynamic forms?
ModerateGenerate form fields from data. Handle dynamic validation. Support field addition/removal. Implement dynamic behavior. Handle state management.
14. How do you handle form state management?
ModerateManage form state in Vuex/Pinia. Handle form persistence. Support state updates. Implement state patterns. Handle form actions.
15. How do you implement form wizards?
ModerateCreate multi-step forms. Handle step validation. Support navigation. Implement progress tracking. Handle state persistence.
16. How do you handle form arrays?
ModerateManage arrays of form inputs. Handle dynamic fields. Support array operations. Implement array validation. Handle array state.
17. How do you implement form accessibility?
ModerateAdd ARIA attributes. Handle keyboard navigation. Support screen readers. Implement accessible labels. Handle focus management.
18. How do you handle form error states?
ModerateDisplay validation errors. Handle error styling. Support error messages. Implement error handling. Handle error recovery.
19. How do you implement form testing?
ModerateTest form validation. Handle input testing. Support submission testing. Implement test utilities. Handle test scenarios.
20. How do you implement advanced form patterns?
AdvancedCreate complex form systems. Handle advanced validation. Support form composition. Implement advanced strategies.
21. How do you handle form optimization?
AdvancedOptimize form performance. Handle large forms. Support form caching. Implement optimization strategies.
22. How do you implement form security?
AdvancedHandle CSRF protection. Implement data validation. Support security measures. Handle sensitive data.
23. How do you handle form internationalization?
AdvancedSupport multiple languages. Handle validation messages. Implement i18n patterns. Support RTL layouts.
24. How do you implement form monitoring?
AdvancedTrack form usage. Handle analytics integration. Support performance monitoring. Implement monitoring strategies.
25. How do you handle form architecture?
AdvancedDesign scalable form systems. Handle form organization. Support architecture patterns. Implement design principles.
26. How do you implement form documentation?
AdvancedCreate comprehensive documentation. Generate API docs. Support example usage. Implement documentation systems.
27. How do you handle form deployment?
AdvancedImplement deployment strategies. Handle environment configuration. Support production optimization. Implement deployment patterns.
28. How do you implement form testing strategies?
AdvancedCreate comprehensive test suites. Handle integration testing. Support unit testing. Implement test strategies.
29. How do you handle form migrations?
AdvancedImplement version updates. Handle migration strategies. Support backwards compatibility. Implement migration patterns.