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10+ KocharTech Interview Questions and Answers
Q1. What is the difference between authorization and authentication?
Authentication verifies the identity of a user, while authorization determines what a user can access.
Authentication confirms the user's identity through credentials like username and password.
Authorization controls the user's access to resources or features based on their authenticated identity.
Example: Logging into a website (authentication) and then being able to view/edit specific pages based on user roles (authorization).
Q2. Software development life cycle
Software development life cycle (SDLC) is a process used to design, develop, and maintain software.
SDLC consists of several phases: requirements gathering, design, development, testing, deployment, and maintenance.
Each phase has specific activities and deliverables.
SDLC models include Waterfall, Agile, and DevOps.
Waterfall follows a sequential approach, while Agile and DevOps are iterative and involve continuous feedback and improvement.
SDLC ensures efficient and quality soft...read more
Q3. Can you explain attributes in Html
Attributes in HTML provide additional information about an element and are defined within the element's start tag.
Attributes are used to modify the behavior or appearance of an HTML element.
They are specified within the opening tag of an element using name-value pairs.
Examples include 'href' in an anchor tag (<a href='https://www.example.com'>) and 'src' in an image tag (<img src='image.jpg'>).
Q4. How to transfer data between components
Methods to transfer data between components in Angular include Input and Output properties, ViewChild, Services, and Event Emitters.
Using Input and Output properties to pass data from parent to child components and emit events from child to parent components.
Using ViewChild to access child components and their properties directly from the parent component.
Using Services to create a shared service that can be injected into multiple components to share data.
Using Event Emitters...read more
Q5. What is Agile. Explain
Agile is a project management methodology that emphasizes flexibility, collaboration, and iterative development.
Agile focuses on delivering working software in short, iterative cycles called sprints.
It values customer collaboration, responding to change, and continuous improvement.
Scrum and Kanban are popular Agile frameworks used in software development.
Agile promotes self-organizing teams and regular feedback to adapt to changing requirements.
Q6. Explain about Flexbox model
Flexbox is a layout model in CSS that allows for dynamic and responsive design of web pages.
Flexbox is used to create flexible layouts that can adapt to different screen sizes and orientations.
It allows for easy alignment and distribution of elements within a container.
Flexbox properties include display: flex, flex-direction, justify-content, align-items, and flex-grow.
Example: display: flex; justify-content: center; align-items: center; flex-direction: row;
Q7. Explain angular components structure
Angular components structure consists of a component decorator, template, styles, and class.
Components are the building blocks of Angular applications
Each component has a decorator that marks it as an Angular component
Components have a template that defines the view
Styles can be added to components using CSS
The class contains the logic for the component
Q8. What are directives
Directives are markers on a DOM element that tell Angular to attach a specified behavior to that DOM element or transform it.
Directives are used to create reusable components in Angular applications.
There are three types of directives in Angular: component, structural, and attribute directives.
Examples of directives include ngIf, ngFor, and ngStyle.
Q9. what is lazy loding
Lazy loading is a technique in web development where resources are loaded only when needed, improving performance.
Lazy loading helps reduce initial load time by loading resources on demand
It is commonly used in Angular for loading modules, components, or routes asynchronously
Lazy loading can improve user experience by only loading necessary resources when required
Q10. what is directive
A directive in Angular is a marker on a DOM element that tells Angular to attach a specific behavior to that element.
Directives are used to extend HTML with new attributes or elements.
They can be classified into three types: Component, Structural, and Attribute directives.
Examples include ngIf, ngFor, and ngStyle.
Q11. set timeout qustions in js
setTimeout function in JavaScript is used to execute a function after a specified amount of time.
setTimeout function takes two parameters: a function to be executed and a time delay in milliseconds
Example: setTimeout(function(){ console.log('Hello!'); }, 2000); will log 'Hello!' after 2 seconds
You can also pass additional arguments to the function being executed
Q12. Pipes in Angular
Pipes in Angular are used for transforming data in templates.
Pipes are used to format data before displaying it in the view.
Angular provides built-in pipes like DatePipe, UpperCasePipe, LowerCasePipe, etc.
Custom pipes can also be created for specific formatting needs.
Pipes can be chained together for multiple transformations.
Example: {{ birthday | date:'dd/MM/yyyy' }} will format the birthday date.
Q13. Explain validations
Validations are checks performed on user input to ensure data integrity and accuracy.
Validations are used to ensure that data entered by users meets certain criteria.
Common types of validations include required fields, data type checks, length restrictions, and pattern matching.
Angular provides built-in validators like required, min/max length, pattern, and custom validators.
Validators can be applied to form controls in Angular templates or programmatically in component class...read more
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