Angular MCQs – Forms in Angular

Forms are a crucial part of any web application, and Angular provides two powerful ways to handle forms: Template-driven forms and Reactive forms. Understanding how to manage user input, validation, and form submission is essential for Angular developers.

These top multiple-choice questions (MCQs) cover key concepts such as form controls, validation, data binding, form groups, and error handling. Practicing these MCQs will help you revise important topics, identify weak areas, and confidently tackle Angular interview questions related to forms. Get ready to enhance your knowledge and perform well in your interviews!

1.) What are the two types of forms in Angular?

A) Static and Dynamic Forms
B) Angular Forms and HTML Forms
C) Model-based and View-based Forms
D) Template-driven and Reactive Forms

Answer: Option D

Explanation: Angular supports Template-driven forms, which use directives in the template, and Reactive forms, which use FormControl and FormGroup classes for a more structured approach.

2.) Which module is required to work with forms in Angular?

A) FormsModule
B) ReactiveFormsModule
C) CommonModule
D) Both A and B

Answer: Option D

Explanation: FormsModule is needed for Template-driven forms, and ReactiveFormsModule is required for Reactive forms.

3.) How do you bind an input field in Template-driven forms?

A) Using [(ngModel)]
B) Using formControlName
C) Using value=””
D) Using {{ variable }}

Answer: Option A

Explanation: [(ngModel)] enables two-way data binding in Template-driven forms.

4.) Which directive is used to create a form in Template-driven forms?

A) formGroup
B) ngForm
C) formControl
D) ngSubmit

Answer: Option B

Explanation: The ngForm directive allows Angular to manage the form and track its state.

5.) What is used to group multiple form controls in Reactive forms?

A) FormControlGroup
B) formArray
C) FormGroup
D) FormCollection

Answer: Option C

Explanation: FormGroup is used to group multiple form controls and track their values and validation status.

6.) How do you apply validation in Template-driven forms?

A) Using Angular Validators in TypeScript
B) Using validation directives in the template
C) Using formValidate() function
D) Forms in Angular do not support validation

Answer: Option B

Explanation: Template-driven forms use built-in validation directives like required, minlength, and pattern.

7.) What is the correct syntax for applying validation in Reactive forms?

A) Validators.required
B) required=”true”
C) form.validate()
D) setValidators(required)

Answer: Option A

Explanation: Angular provides built-in validation functions like Validators.required, Validators.minLength(), etc.

8.) How do you submit a form in Angular?

A) Using (click)=”submit()”
B) Using (submit)=”onSubmit()”
C) Using (ngSubmit)=”onSubmit()”
D) Using (formSubmit)=”onSubmit()”

Answer: Option C

Explanation: The ngSubmit event ensures that the form is submitted only when it is valid.

9.) How do you check if a form control is valid?

A) formControl.status
B) formControl.invalid
C) formControl.validState
D) formControl.valid

Answer: Option D

Explanation: The .valid property returns true if the control meets all validation rules.

10.) What is the purpose of formArray in Reactive forms?

A) To handle dynamic form controls
B) To validate email fields
C) optTo reset the formon3
D) To store error messages

Answer: Option A

Explanation: FormArray is used when you need to manage dynamic form controls like adding/removing inputs dynamically.

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