Computer Knowledge

GUI and Web Frameworks

1,915 Questions

Graphical user interface and web frameworks involve layout management, directives, and application design across platforms like Android and Angular. These concepts are tested in computer science and IT officer competitive exams. Review these questions to understand UI components and coding standards.

Android layout attributesAngular structural directivesVB.Net web methodsJava Swing componentsSiebel application framework

GUI and Web Frameworks Questions

Multiple choice

What is the default value of the flex-grow property?

  1. 0

  2. 1

  3. 2

  4. 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The default value of the flex-grow property is 0, which means that flex items will not grow when there is extra space in the flex container.

Multiple choice

What is the default value of the flex-shrink property?

  1. 0

  2. 1

  3. 2

  4. 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The default value of the flex-shrink property is 1, which means that flex items will shrink proportionally when there is not enough space in the flex container.

Multiple choice

What is the default value of the flex-basis property?

  1. 0

  2. auto

  3. 100%

  4. 200%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The default value of the flex-basis property is auto, which means that flex items will have their natural size.

Multiple choice

Which standard provides guidelines for the design of user interfaces for software applications?

  1. ISO 9241-11

  2. ISO 9241-10

  3. ISO 9241-12

  4. ISO 9241-13
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

ISO 9241-11 provides guidelines for the design of user interfaces for software applications, including principles for user-centered design, task analysis, and usability testing.

Multiple choice

What is the main concept behind React?

  1. Virtual DOM

  2. Component-based architecture

  3. Declarative programming

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

React is based on the concept of virtual DOM, component-based architecture, and declarative programming.

Multiple choice

What is the purpose of the virtual DOM in React?

  1. To improve performance

  2. To make the code more readable

  3. To make the code more maintainable

  4. To make the code more portable
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The virtual DOM is used in React to improve performance. It is a lightweight representation of the real DOM, which allows React to efficiently update the UI.

Multiple choice

What is a component in React?

  1. A reusable piece of code that renders a UI

  2. A function that returns a UI

  3. A class that defines a UI

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In React, a component can be a reusable piece of code that renders a UI, a function that returns a UI, or a class that defines a UI.

Multiple choice

What is the purpose of a component in Angular?

  1. To define a reusable UI element

  2. To handle user input

  3. To manage state

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Components in Angular are used to create reusable UI elements, handle user input, and manage state.

Multiple choice

What is the syntax for creating a component in Angular?

  1. @Component({selector: 'my-component', templateUrl: 'my-component.html'})

  2. @Component({selector: 'my-component', template: 'My Component'})

  3. @Component({selector: 'my-component'})

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To create a component in Angular, you use the @Component decorator. The selector property specifies the CSS selector that will be used to identify the component in HTML, and the template property specifies the HTML template that will be used to render the component.

Multiple choice

What is the syntax for creating a template in Angular?

  1. <ng-template #myTemplate>My Template</ng-template>

  2. <template #myTemplate>My Template</template>

  3. <template>My Template</template>

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

To create a template in Angular, you use the element. The `#myTemplate` attribute specifies the name of the template, and the content of the element is the HTML template that will be rendered.

Multiple choice

What is the purpose of the *ngFor directive in Angular?

  1. To iterate over an array of data

  2. To create a loop

  3. To display a list of items

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The *ngFor directive in Angular is used to iterate over an array of data and display a list of items. It can be used to create loops and display dynamic content.

Multiple choice

What is the syntax for using the *ngFor directive in Angular?

  1. <ul><li *ngFor="let item of items">{{item}}</li></ul>

  2. <ul><ng-for *ngFor="let item of items">{{item}}</ng-for></ul>

  3. <ul><li *ngFor="item in items">{{item}}</li></ul>

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

To use the *ngFor directive in Angular, you specify the array of data that you want to iterate over in the of attribute. The let keyword specifies the name of the variable that will be used to access each item in the array, and the {{item}} expression is used to display the value of each item.

Multiple choice

What is the purpose of the *ngIf directive in Angular?

  1. To conditionally display an element

  2. To show or hide an element

  3. To toggle an element

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The *ngIf directive in Angular is used to conditionally display an element. It can be used to show or hide an element based on a condition, or to toggle an element between two states.

Multiple choice

What is the purpose of the (click) event binding in Angular?

  1. To listen for a click event on an element

  2. To handle a click event on an element

  3. To trigger a function when an element is clicked

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The (click) event binding in Angular is used to listen for a click event on an element. When the element is clicked, the event binding will trigger a function that can be used to handle the event.

Multiple choice

What is the syntax for using the (click) event binding in Angular?

  1. <button (click)="handleClick()">Click Me</button>

  2. <button [click]="handleClick()">Click Me</button>

  3. <button click="handleClick()">Click Me</button>

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

To use the (click) event binding in Angular, you specify the function that you want to call when the element is clicked in the (click) attribute. The function must be defined in the component class.