Technumen Front end Developer Interview Questions and Answers

Aptitutde test was easy asking qued about web technologies

Q1. Questions were about javascript mainly.
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Q1. JWT authentication and authorisation.
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Q1. Run tasks on Code Sandbox
Ans. 
Code Sandbox allows running tasks for front-end development
• Open Code Sandbox and create a new project

• Add necessary dependencies and files

• Run tasks using npm scripts or command line

• Examples: build, start, test
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In aptitude test there are multiple choice questions . mathematics ,logical,regening etc

Q1. Introduction your self? Good morning sir,mam Thank you for giving me this opportunity to introduce myself My name is mamta. I am from butibori in Maharashtra I am completed my bachelor degree in computer...read more
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Q2. Why java is independent?
Ans. 
Java is independent because of its platform-independent nature.
• Java code is compiled into bytecode which can run on any platform with a JVM.

• It follows the 'Write Once, Run Anywhere' (WORA) principle.

• Java's platform independence is achieved through its architecture and class libraries.

• Java's platform independence makes it a popular choice for developing cross-platform applications.
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Q3. What is final keywords?
Ans. 
final keyword is used in Java to make a variable, method or class unchangeable or unextendable.
• final variables cannot be reassigned

• final methods cannot be overridden

• final classes cannot be extended

• final keyword is used for optimization in Java

• final keyword is used to ensure immutability in Java
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I am completed servey in ration card

Q1. All about the front end basic questions
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Q2. What are all basic CSS properties
Ans. 
Basic CSS properties include color, font-size, margin, padding, and display.
• color

• font-size

• margin

• padding

• display
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Q3. Basic question on javascript
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Round duration - 60 minutes
Round difficulty - Medium

Technical Interview round with questions based on Javascript mainly.

Q1. JavaScript Question
What are the data types in Javascript?
Ans. 
The set of types in the JavaScript language consists of primitive values and objects.

1. Primitive values (immutable datum represented directly at the lowest level of the language)
1.1 Boolean type : Boolean represents a logical entity and can have two values: true and false. 
1.2 Null type : The Null type has exactly one value: null.
1.3 Undefined type : A variable that has not been assigned a value has the value und...read more
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Q2. JavaScript Question
What is the typeof() operator?
Ans. 
In JavaScript, the typeof operator returns the data type of its operand in the form of a string. The operand can be any object, function, or variable.
Syntax: typeof operand

The possible types that exists in javascript are:

undefined
Object
boolean
number
string
symbol
function
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Q3. JavaScript Question
What is the return type of getElementsByClass method?
Ans. 
The getElementsByClassName method of Document interface returns an array-like object of all child elements which have all of the given class name(s).
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Q4. JavaScript Question
Is Javascript single threaded or multi threaded?
Ans. 
JavaScript is a single-threaded language, which means it has only one call stack that is used to execute the program. The call stack is the same as the stack data structure that you might read in Data structures. As we know stacks are FILO that is First In Last Out. Similarly, within the call stack, whenever a line of code gets inside the call stack it gets executed and move out of the stack. In this way, JavaScript is...read more
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Q5. JavaScript Question
Explain the Async/ Await function.
Ans. 
Async/Await is the extension of promises which we get as a support in Javascript. 

Async: It simply allows us to write promises based code as if it was synchronous and it checks that we are not breaking the execution thread. It operates asynchronously via the event-loop. Async functions will always return a value. It makes sure that a promise is returned and if it is not returned then javascript automatically wraps...read more
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Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions based on Angular mainly.

Q1. Technical Question
What is AOT compilation? What are the advantages of AOT?
Ans. 
Every Angular application consists of components and templates which the browser cannot understand. Therefore, all the Angular applications need to be compiled first before running inside the browser.

Angular provides two types of compilation:
JIT(Just-in-Time) compilation
AOT(Ahead-of-Time) compilation

In JIT compilation, the application compiles inside the browser during runtime.
Whereas in the AOT compilation, the applic...read more
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Q2. Angular Question
What are lifecycle hooks in Angular? Explain ngOnInit() hook.
Ans. 
Every component in Angular has a lifecycle, different phases it goes through from the time of creation to the time it's destroyed. Angular provides hooks to tap into these phases and trigger changes at specific phases in a lifecycle.

ngOnInit( ) This hook gets called once, after the ngOnChanges hook. It initializes the component and sets the input properties of the component.
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Q3. Angular Question
How does one share data between components in Angular?
Ans. 
Child to parent using @Output and EventEmitter : 
In this method, we bind a DOM element inside the child component, to an event ( click event for example ) and using this event we emit data that will captured by the parent component:

Child Component:
import {Component, Output, EventEmitter} from '@angular/core';

@Component({
selector: 'app-child',
template:`
Click to emit data
`,
styleUrls: ['./child.component.css']
})
expor...read more
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Q4. Angular Question
Different Types Of Data Binding In Angular?
Ans. 
There mainly two types of data binding in angular

One way data binding
One way data binding is a change in the state affects the view from component to view template or change in the view affects the state from view template to component.

Two-way data binding
Two-way data binding is a change from the view can also change the model and similarly changes in the model can also change in the view from component to view templat
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Basic to intermediate questions on javascript

Q1. What do you understand by z index
Ans. 
z index determines the stacking order of elements on a webpage.
• z index is a CSS property that specifies the stack order of an element

• Elements with a higher z index value will be displayed on top of elements with a lower value

• Default z index value is 0, negative values are allowed

• z index only works on positioned elements (position: relative, absolute, fixed)
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Q2. What is difference between position relative and absolute
Ans. 
Position relative is relative to its normal position, while position absolute is relative to its nearest positioned ancestor.
• Position relative moves an element relative to its normal position.

• Position absolute moves an element relative to its nearest positioned ancestor.

• Position absolute elements are taken out of the normal flow of the document.
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Design a carousel using jQuery and css

Q1. I don't know how much number will be required
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Q2. Ask to sql. html and css java script
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