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Idea Usher Backend Developer Interview Questions and Answers
Idea Usher Backend Developer Interview Experiences
1 interview found
Anonymous
I applied via LinkedIn
(6 Questions)
- Q1. What is javascript
- Ans.
JavaScript is a high-level, interpreted programming language used for creating interactive websites and web applications.
JavaScript is often used for client-side web development.
It can also be used for server-side development with Node.js.
JavaScript allows for dynamic content, interactivity, and animations on websites.
Commonly used for form validation, interactive maps, and dynamic content loading.
Example: document.get
- Q2. What is event loop
- Ans.
Event loop is a mechanism in programming that allows for asynchronous execution of code.
Event loop is a part of the runtime environment that continuously checks the call stack and the callback queue.
It allows for non-blocking I/O operations by handling asynchronous tasks efficiently.
Example: In Node.js, the event loop is responsible for handling asynchronous operations like reading files or making network requests.
- Q3. Mongodb aggregration
- Q4. Indexing in mongodb
- Ans.
Indexing in MongoDB improves query performance by creating indexes on fields in a collection.
Indexes can be created on single fields or compound fields.
Indexes can be created in ascending or descending order.
Indexes can improve query performance by allowing MongoDB to quickly locate documents.
Examples: db.collection.createIndex({ field: 1 }), db.collection.createIndex({ field1: 1, field2: -1 })
- Q5. Async await and promises
- Q6. Real world problems
Interview Preparation Tips
Skills evaluated in this interview
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Interview questions from similar companies
Normal java coding question
(2 Questions)
- Q1. What are spring ioc
- Ans.
Spring IoC (Inversion of Control) is a design pattern where the control of object creation and lifecycle is shifted to a container or framework.
In Spring IoC, objects are created and managed by the Spring container.
It helps in achieving loose coupling between classes.
Dependency Injection is a key feature of Spring IoC, where dependencies of a class are injected by the container.
Example: @Autowired annotation in Spring
- Q2. Different implementation of map interface
- Ans.
The Map interface in Java provides a way to store key-value pairs and retrieve values based on keys.
Different implementations of the Map interface include HashMap, TreeMap, LinkedHashMap, and ConcurrentHashMap.
HashMap provides constant-time performance for basic operations but does not guarantee the order of elements.
TreeMap maintains elements in sorted order based on keys.
LinkedHashMap maintains the insertion order of...
Skills evaluated in this interview
It's about implementing rest apis
(2 Questions)
- Q1. Java 8 interview
- Q2. Rest api development
I applied via Company Website and was interviewed in Mar 2020. There were 4 interview rounds.
Interview Questionnaire
3 Questions
- Q1. About previous projects and challenges in those
- Q2. About how to create backends which can take high traffic
- Q3. Security related. SQL injection, XSS etc.
Interview Preparation Tips
I applied via Approached by Company and was interviewed in Nov 2024. There was 1 interview round.
(2 Questions)
- Q1. What are your projects
- Q2. Why you want to join hackerrank
Interview Preparation Tips
Normal java coding question
(2 Questions)
- Q1. What are spring ioc
- Ans.
Spring IoC (Inversion of Control) is a design pattern where the control of object creation and lifecycle is shifted to a container or framework.
In Spring IoC, objects are created and managed by the Spring container.
It helps in achieving loose coupling between classes.
Dependency Injection is a key feature of Spring IoC, where dependencies of a class are injected by the container.
Example: @Autowired annotation in Spring
- Q2. Different implementation of map interface
- Ans.
The Map interface in Java provides a way to store key-value pairs and retrieve values based on keys.
Different implementations of the Map interface include HashMap, TreeMap, LinkedHashMap, and ConcurrentHashMap.
HashMap provides constant-time performance for basic operations but does not guarantee the order of elements.
TreeMap maintains elements in sorted order based on keys.
LinkedHashMap maintains the insertion order of...
Skills evaluated in this interview
It's about implementing rest apis
(2 Questions)
- Q1. Java 8 interview
- Q2. Rest api development
I applied via Company Website and was interviewed in Mar 2020. There were 4 interview rounds.
Interview Questionnaire
3 Questions
- Q1. About previous projects and challenges in those
- Q2. About how to create backends which can take high traffic
- Q3. Security related. SQL injection, XSS etc.
Interview Preparation Tips
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