Candela Labs Senior Software Engineer Interview Questions and Answers

Q1. Explain model, view and controller in brief
Ans. 
Model represents data, View displays data to user, Controller handles user input and updates model/view
• Model: Represents data and business logic

• View: Displays data to user

• Controller: Handles user input and updates model/view

• Example: In a web application, model could be a database table, view could be an HTML page, and controller could be a server-side script
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Q2. What are the various steps to create request object
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Steps to create a request object
• Define the request object class

• Add properties to the request object class

• Implement methods to set and get values of the properties

• Instantiate the request object class

• Set values for the properties of the request object
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Q1. Where do you see yourself in next 5 years?
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Q2. Why are you interested in this job
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Q1. Basic Java Questions
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Q2. Coding, OOPS, Collections
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Q3. L2 : Techno Manager Round
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Q4. Project Overview
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Q5. Spring Boot, Quarkus
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First round will be coding test which will have Core java questions

Q1. Type of Class Loaders available in java
Ans. 
Java has three types of class loaders: Bootstrap Class Loader, Extension Class Loader, and System Class Loader.
• Bootstrap Class Loader loads core Java classes located in the bootstrap classpath.

• Extension Class Loader loads classes from the extensions directory.

• System Class Loader loads classes from the classpath specified by the CLASSPATH environment variable.
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Q2. Coding question related find 3nd highest number with single loop and minimum time complexity.
Ans. 
Use a single loop to find the 3rd highest number in an array with minimum time complexity.
• Iterate through the array and keep track of the three highest numbers encountered so far.

• Update the three highest numbers as you iterate through the array.

• Return the third highest number once the loop is completed.
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Q3. What is diff between cyclicBarrier and countDownLatch?
Ans. 
CyclicBarrier allows a group of threads to wait at a barrier until all threads have reached it, while CountDownLatch allows one or more threads to wait until a set of operations being performed in other threads completes.
• CyclicBarrier is reusable, while CountDownLatch is not.

• CyclicBarrier allows all threads to wait for each other, while CountDownLatch allows one thread to wait for others.

• CyclicBarrier resets automatica...read more
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Q4. What is diff between JPARepository and CURDRepository?
Ans. 
JPARepository is a Spring Data interface for JPA-based repositories, while CRUDRepository is a generic interface for CRUD operations.
• JPARepository extends CRUDRepository and provides additional JPA-specific methods.

• CRUDRepository is a generic interface for CRUD operations on a repository.

• JPARepository is typically used for JPA-based repositories, while CRUDRepository can be used for any type of repository.

• JPARepository...read more
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Q1. Second round is pending
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Q1. 1. Pattern print code. 2. Types of S3 bucket in AWS. 3. Java basic question. 4. Spring/ Spring boot basic question. 5. Hibernate basic interview question. 6. Some behavioral question.
Ans. 
This is a list of questions asked in an interview for Senior Software Engineer position.
• 1. Pattern print code: Write a code to print a specific pattern using loops.

• 2. Types of S3 bucket in AWS: Explain the different types of S3 buckets in Amazon Web Services.

• 3. Java basic question: Provide a basic question related to Java programming language.

• 4. Spring/Spring Boot basic question: Give an example of a basic question rel...read more
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Q1. Angular Architecture, basic angular questions such as data binding, rxjs, dependency injection etc.
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Q1. Coding assignment to fetch data from API and render on the UI. Using httpclient module.
Ans. 
Fetch data from API and render on UI using httpclient module
• Create an instance of httpclient module

• Use httpclient to make a GET request to API endpoint

• Parse the response data and render on UI
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Q1. Normal question on roles and responsibilities alongwith cultural fitment check.
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Q1. Client interview to get the knowledge of UX and responsive web application. Css etc.
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I asked basic questions related to coding and technical languages like MERN, and a few DSA questions about basic programming. The interview was around 45 minutes.

2nd round took about 1 hour and 15 minutes. There are a few technical scenario discussions and questions related to my tech stack like MERN and one coding task in React JS

Q1. The last round with the manager consisted of a discussion about day-to-day job handling as per different scenarios.
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Q1. Notice Period and Salary
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Java 8 , stream and a program to solve on String

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