Alpha Solutions React Js Frontend Developer Interview Questions and Answers

He had given JavaScript questions first & he asked about the output of that questions topics related is like - function, async & await, setTimeout.

Q1. const transaction = [
{id: 1, amount: 100, type: "credit"},
{id: 2, amount: -50, type: "debit" },
{id: 3, amount: 200, type: "credit"},
{id: 4, amount: -150, type: "debit"},
{id: 5, amount: 50, type: "credit"}
];

const threshold = 100;

O/P - {
balance: 150,
exceededTransactions: [1, 3, 4, 5]
}

Q2. Anagrams
I/P: ["abc", "bca", "cat", "act"]
O/p - [["abc", "bca"],["cat","act"]]

Q1. What are pipes in angular?
Ans. 
Pipes in Angular are used to transform data in templates.
• Pipes are used to format data before displaying it in the view.

• They can be used to filter, sort, or manipulate data in various ways.

• Examples include currency, date, uppercase, and lowercase pipes.
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Q1. Ask Angular HTML CSS related questions Like how to call url in angular and url is secure so how to handle it . What is closure in js How to write custom pipe. How to set watermark on webpage. diff b/w sas...read more
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Q2. What know about angular. what is typescript.
Ans. 
Angular is a JavaScript framework for building web applications. TypeScript is a superset of JavaScript that adds static typing.
• Angular is a popular frontend framework developed by Google.

• It uses TypeScript as its primary language.

• TypeScript is a superset of JavaScript that adds optional static typing and other features.

• It helps catch errors at compile time and improves code maintainability.

• TypeScript code is compiled ...read more
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Involves theoretical and practical coding questions.

Solve 4-6 coding questions within specific time. Level medium to hard

Q1. How React JS works Vertual DOM Life cycles Javascript Variables Scopings Hoisting
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He had given JavaScript questions first & he asked about the output of that questions topics related is like - function, async & await, setTimeout.

Q1. const transaction = [
{id: 1, amount: 100, type: "credit"},
{id: 2, amount: -50, type: "debit" },
{id: 3, amount: 200, type: "credit"},
{id: 4, amount: -150, type: "debit"},
{id: 5, amount: 50, type: "credit"}
];

const threshold = 100;

O/P - {
balance: 150,
exceededTransactions: [1, 3, 4, 5]
}

Q2. Anagrams
I/P: ["abc", "bca", "cat", "act"]
O/p - [["abc", "bca"],["cat","act"]]

Aptitude round will for 30 min .

Simple programming test

Q1. Microservices, monolithic, micro front end architecture
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Q1. High level discussion
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Q1. React coding question on ref. Javascript code questions ex palindrome
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Some reasoning, English, numerical ability and some questions related to html , CSS javascript. question were basic.

Q1. Question were basic questions like when you search on google fresher interview it questions .
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Q1. One coding question and then oops concept and searching, sorting.
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Q1. HR just asked me about project and were telling me about company.
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