Johnson Controls Software Engineer Interview Questions and Answers

Reversing a linked list involves changing the direction of its nodes to point backwards.

• 1. Initialize three pointers: prev (null), current (head), and next (null).

• 2. Traverse the list: while current is not null, do the following:

• a. Set next to current.next to save the next node.

• b. Reverse the current node's pointer: current.next = prev.

• c. Move prev and current one step forward: prev = current; current = n...read more

const prevents modification of a variable, while volatile indicates a variable may change unexpectedly.

• const: Used to declare variables whose value cannot be changed after initialization. Example: 'const int x = 10;'

• volatile: Used to inform the compiler that a variable may be changed by external factors. Example: 'volatile int flag;'

• const can be applied to pointers: 'const int* ptr' means the value pointed to cann...read more

This question assesses your problem-solving skills and technical knowledge as a software engineer.

• Understand the problem clearly before attempting to solve it.

• Break down the problem into smaller, manageable parts.

• Consider edge cases and how they might affect your solution.

• Use examples to illustrate your thought process, such as coding a simple algorithm.

• Communicate your approach clearly and ask for feedback.

Negotiating compensation can be challenging; understanding value and market standards is key to achieving desired outcomes.

• Research industry standards: Understand the average salary for your role in your location.

• Highlight your skills: Emphasize unique skills or experiences that add value to the company.

• Be flexible: Consider other benefits like remote work, bonuses, or professional development opportunities.

• Practi...read more

final, finally, and finalize are keywords in Java with different meanings.

• final is a keyword used to declare a constant value, a variable that cannot be modified.

• finally is a block used in exception handling to ensure a piece of code is always executed, whether an exception is thrown or not.

• finalize is a method in the Object class that is called by the garbage collector before an object is destroyed.

• final and fina...read more

C is a procedural language, while Java is an object-oriented language with automatic memory management.

• C is a low-level language, providing more control over hardware; Java is high-level, focusing on portability and ease of use.

• C uses pointers for memory management; Java uses references and has automatic garbage collection.

• C is compiled to machine code, while Java is compiled to bytecode, which runs on the Java Vi...read more