CompuCom Service Engineer Interview Questions and Answers

Q1. Core Java Questions on Stream API, Exception handling, Java 8 features and some questions from collections
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Q1. Small program to write and other questions on Spring, Spring Boot, Hibernate, JPA, jQuery and HTML & CSS.
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Q1. Basic discussion on salary expectations and other general discussion.
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Q1. 1.SOLID Principles: Define in detail the solid principles, interviewer will be more focused on the practical examples of the principles.
Ans. S stands for single responsibility, O stands for Open for extension and closed for modification, L stands for Liskov Substitution principle, I stands for Inversion of control and D stands for Dependency inversion
Answered by Sweta Lavania
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Q1. Coding questions like implement linked list
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Q2. Find the second largest element from the array.
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Q3. Sort the array and return second last element
Ans. 
Sort array and return second last element
• Use built-in sort function

• Access second last element using array index -2
Answered by AI
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Q1. General Java, springboot and oops
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Q1. Managerial round with Technical Lld and design related questions
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Q1. Client round technical LLD AND HLD questions
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Q1. HR discussion about salary and client details
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Q1. 1.polyfill map, currying vs closure, reduce method, explain this?, 2.what is lazyload and suspense, single thread vs multi thread, Event loop(task queue & microtask queue)?
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Q2. Explain redux? Redux vs context api? ES6 features? Rest vs Spread? null vs undefined?
Ans. 
Redux is a predictable state container for JavaScript apps.
• Redux is a state management library for JavaScript applications.

• It helps in managing the state of an application in a predictable way.

• Redux follows a unidirectional data flow pattern.

• Context API is a built-in feature of React that can be used for state management, but it is not as powerful as Redux.

• ES6 features include arrow functions, template literals, destru...read more
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Output based question regarding shallow and deepcopy related to object.
write a program for i/p: "This is the JS guide, developer!" o/p: "sihT si eht SJ ,ediug !repoleved"
react timer based output start, stop and reset.

Q1. Java basics to advanced
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Q2. Collections concepts in java
Ans. 
Collections in Java are data structures that store and manipulate groups of objects.
• Collections framework provides interfaces (List, Set, Map) and classes (ArrayList, HashSet, HashMap) for storing and manipulating data.

• Collections offer methods for adding, removing, and accessing elements in a structured way.

• Collections can be used to sort, search, and iterate over elements efficiently.

• Example: ArrayList<String> ...read more
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Q3. Threads and its life cycle
Ans. 
Threads in programming have a life cycle that includes creation, running, blocking, and termination.
• Threads are created using the Thread class in Java or pthread_create in C.

• Threads start running when the start() method is called.

• Threads can be blocked using methods like sleep(), wait(), or join().

• Threads terminate when their run() method completes or when explicitly stopped.
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Q4. OOPS with DB connections
Ans. 
Object-oriented programming principles can be applied to manage database connections efficiently.
• Encapsulation: Encapsulate database connection details within a class to hide complexity.

• Inheritance: Use inheritance to create reusable database connection classes.

• Polymorphism: Implement polymorphism to switch between different types of database connections.

• Abstraction: Abstract database connection methods to simplify usa...read more
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Q5. Spring boot basic to medium
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