Johnson Controls Application Developer Interview Questions and Answers

Q1. OOPs concepts and program on linked list reversal and c pointer concepts
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Q1. OOPs concepts,C basis, IPC and signals
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Q1. OOPs concepts, c basics, data structures
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Q1. Share details of your previous job.
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Q2. What are your salary expectations?
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Q3. What is your family background?
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Q4. Why are you looking for a change?
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Q5. Tell me about yourself.
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Q1. OOPS concepts list and explain
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OOPS concepts are fundamental to object-oriented programming. They include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: bundling data and methods that operate on that data within a single unit.

• Inheritance: creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: the ability of objects to take on multiple forms, depending on the context.

• Abstraction: hidin...read more
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Q2. Project related questions
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Q3. Programs for inheritance, ArrayList operations
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Inheritance is a way to create new classes based on existing ones. ArrayList is a dynamic array implementation in Java.
• Inheritance allows a subclass to inherit properties and methods from a superclass.

• ArrayList operations include adding, removing, and accessing elements.

• Example of inheritance: class Dog extends Animal

• Example of ArrayList operation: myList.add(element)
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Q4. Mysql queries to demonstrate joins
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Q5. REST api methodology
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Q6. Spring annotations for data-jpa
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Spring annotations for data-jpa
• The @Entity annotation is used to mark a class as a persistent entity

• The @Repository annotation is used to indicate that the class provides the mechanism for storage, retrieval, search, update, and delete operation on objects

• The @Transactional annotation is used to specify the transactional behavior of a method or class

• The @Query annotation is used to specify a JPQL or native SQL query

• The...read more
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