IT By Design Software Engineer Interview Questions and Answers

Q1. What is the difference between the == operator and the .equals() method in Java?
Ans. 
In Java, '==' checks reference equality, while '.equals()' checks logical equality of object content.
• Reference Equality: '==' compares memory addresses, checking if two references point to the same object. Example: 'a == b'.

• Logical Equality: '.equals()' compares the actual content of objects. Example: 'a.equals(b)' checks if 'a' and 'b' are logically equivalent.

• Default Behavior: The default implementation of '.equals()...read more
Answered by AI
Add your answer
Q2. How does Java manage memory?
Ans. 
Java manages memory through automatic garbage collection, heap allocation, and stack management for efficient resource utilization.
• Heap Memory: Java allocates memory for objects in the heap, which is shared among all threads, allowing dynamic memory allocation.

• Stack Memory: Local variables and method calls are stored in the stack, which is managed in a last-in, first-out manner, ensuring quick access.

• Garbage Collection...read more
Answered by AI
Add your answer

2 medium hard level questions. We just have to code and explain it. Platform doesn't have compilers.

Q1. Given an array Reverse array
Add your answer
Q2. Giaven a string Reverse string
Add your answer
Q3. Given array find sum of all elements
Add your answer

Good Knowledge of DSA is required

1 hours, java, vs code

1 hour, good, aptitude

Q1. Operate or control a particualar typing of data device that is attached to a computer
Add your answer
Q2. Operate or contriol
Add your answer
Q3. In computing a device driver is a computer program that operates or controls a particular type of device that is attached to a computer or automaton
Add your answer
Q4. To perform some manual act upon a human body in a methodical manner, and usually with instruments, with a view to restore soundness or health, as in amputation, lithotomy, etc.
Add your answer

Leet code medium level question

Q1. About Java Streams
Add your answer
Q2. Restful API coding completion based on given file
Ans. 
Guide to completing a RESTful API coding task with essential pointers and examples.
• Understand REST principles: Use HTTP methods (GET, POST, PUT, DELETE) appropriately.

• Define clear endpoints: Example - /api/users for user-related operations.

• Implement status codes: Use 200 for success, 404 for not found, 500 for server errors.

• Use JSON for data interchange: Ensure requests and responses are in JSON format.

• Consider authent...read more
Answered by AI
Add your answer

Q1. To check your attitude
Add your answer
Q2. Given detailed about company and what project you are going to work on?
Add your answer

Q1. Hashmap working
Add your answer
Q2. Multithreading cases
Add your answer
Q3. Scenario specific on how to handle multiple events on a single variable to have accurate result
Ans. 
Managing multiple events on a single variable requires careful synchronization to ensure accurate results.
• Use locks or mutexes to prevent race conditions when accessing the variable.

• Implement event debouncing to limit the frequency of updates, ensuring only the final event is processed.

• Utilize a queue to handle events sequentially, processing them one at a time to maintain accuracy.

• Consider using atomic operations for ...read more
Answered by AI
Add your answer
Q4. Database indexing
Add your answer
Q5. Architecture level
Add your answer