ValueLabs Technical Lead Interview Questions and Answers

Q1. Life cycle hooks in Angular
Ans. 
Life cycle hooks in Angular are methods that allow you to tap into the lifecycle of a component or directive.
• ngOnChanges - called when an input property changes

• ngOnInit - called once when the component is initialized

• ngDoCheck - called during every change detection run

• ngAfterContentInit - called after content (ng-content) has been projected into the component

• ngAfterContentChecked - called after every check of the projec...read more
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Q2. Explain Interception in Angular
Ans. 
Interception in Angular allows you to intercept and modify HTTP requests and responses.
• Interceptors are services that can be used to intercept HTTP requests and responses

• They can be used to add headers, modify requests, handle errors, etc.

• Example: Adding an authorization token to every outgoing request
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Q1. Explain your previous project.
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Q2. Some question from cicd
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Q1. How soon you can join
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Q1. What is microservice
Ans. 
Microservices are a software development technique where an application is composed of small, independent services that communicate over well-defined APIs.
• Microservices are small, independent services that work together to form an application

• Each microservice is responsible for a specific function or feature

• Microservices communicate with each other over well-defined APIs

• Microservices can be developed, deployed, and sca...read more
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Q2. Explain repository design pattern
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Repository design pattern is a structural design pattern that separates the data access logic from the business logic in an application.
• It provides a way to access data from a data source without exposing the underlying data access code to the business logic.

• It helps in achieving separation of concerns by keeping data access code in a separate layer.

• Commonly used in applications where data needs to be accessed from mul
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Q1. Design an weather app using android architecture components?
Ans. 
Design a weather app using Android architecture components.
• Use MVVM architecture pattern for separation of concerns

• Implement LiveData for real-time data updates

• Utilize Room database for offline data storage

• Integrate Retrofit for network calls to fetch weather data

• Use ViewModel to manage UI-related data in a lifecycle-conscious way
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Q1. Discussion on projects done
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Q1. The questions were around Microservices and Java also a bit of NodeJS was asked sounded ok except this was rescheduled twice
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Q1. 2 People Mostly Architects Interviewed me and asked me on Websockets and when they are used Node JS and its advantages. I goto know this was a Project/ Position specific hire and a lot of questions around ...read more
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Q1. The manager was very rude he as i had a break of 1 year he was kind of refusing to take interview for the first 5-10 mins asking reasons for the gap and i did explain him i had taken sabbatical due to heal...read more
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Simple array questions

Q1. Difference between spring jpa and hibernate
Ans. 
Spring JPA is a part of the Spring framework that provides an abstraction layer on top of JPA, while Hibernate is a standalone ORM framework.
• Spring JPA is a part of the Spring framework and provides additional features like transaction management, dependency injection, and aspect-oriented programming.

• Hibernate is a standalone ORM framework that provides mapping between Java objects and database tables, along with featu...read more
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Q2. What is cyclic barrier
Ans. 
Cyclic barrier is a synchronization aid that allows a set of threads to wait for each other to reach a common barrier point.
• Cyclic barrier is similar to CountDownLatch but can be reused after the barrier point is reached.

• It is initialized with a count of the number of threads that must invoke await() before the barrier is tripped.

• Threads wait at the barrier until all threads have invoked await(), then the barrier is re...read more
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