Ohhpro Technologies Interview Questions and Answers

Q1. Make a calculator app with all functionality
Ans. 
A calculator app with all functionality
• Create a UI with buttons for numbers, operators, and functions

• Implement logic to perform calculations based on user input

• Include features like memory functions, history of calculations, and error handling
Answered by AI
Add your answer
Q2. React Basic questions
Add your answer

Q1. Creating dynamic form from given dataset
Ans. 
Use the dataset to dynamically create a form.
• Iterate through the dataset to generate form fields

• Use React state to manage form data

• Implement validation for form fields

• Handle form submission to send data
Answered by AI
Add your answer

Q1. Write a Java program to reverse a string.
Add your answer
Q2. Write a Program to remove duplicate elements from ArrayList.
Ans. 
Program to remove duplicate elements from ArrayList
• Create a new HashSet to store unique elements

• Iterate through the ArrayList and add elements to the HashSet

• Convert the HashSet back to an ArrayList to remove duplicates
Answered by AI
Add your answer
Q3. Write a Program to print Longest non repeating substring.
Add your answer
Q4. Without Using collection and stream , write the solution for 3rd question
Ans. 
Provide a solution to a problem without using collections or streams in Java.
• Use basic arrays to store data. Example: String[] names = new String[5];

• Implement loops for iteration. Example: for (int i = 0; i < names.length; i++) { /* process names[i] */ }

• Utilize conditional statements for logic. Example: if (names[i].equals("John")) { /* do something */ }

• Create methods for modularity. Example: public void processName...read more
Answered by AI
Add your answer
Q5. Create DB schema and Build RESTFul API using SpringBoot,
Add your answer
Q6. Another String question was there.
Add your answer

Basic java and advanced java

Q1. What is interface
Add your answer

Q1. What is interface?
Ans. 
An interface in Java defines a contract for classes, specifying methods that must be implemented without providing their implementation.
• An interface can contain method signatures and constants but no method bodies.

• Classes implement interfaces using the 'implements' keyword, e.g., 'class MyClass implements MyInterface'.

• Interfaces support multiple inheritance, allowing a class to implement multiple interfaces.

• Example: 'p...read more
Answered by AI
Add your answer
Q2. What is Java
Ans. 
Java is a high-level, object-oriented programming language designed for portability across platforms and ease of use.
• Platform Independence: Java code is compiled into bytecode, which can run on any device with a Java Virtual Machine (JVM), ensuring 'write once, run anywhere'.

• Object-Oriented: Java supports principles like encapsulation, inheritance, and polymorphism, allowing for modular and reusable code.

• Rich Standard ...read more
Answered by AI
Add your answer