Hexaware Technologies Software Engineer Interview Questions and Answers

Java processes multithreading using Thread class, Runnable interface, and Executor framework for concurrent execution.

• Use the Thread class: Extend Thread and override run() method. Example: class MyThread extends Thread { public void run() { /* code */ } }

• Implement Runnable interface: Create a class that implements Runnable and override run() method. Example: class MyRunnable implements Runnable { public void run(...read more

Use a SQL query with GROUP BY and HAVING clause to find duplicates in a table.

• Use GROUP BY to group rows with the same values together

• Use HAVING COUNT(*) > 1 to filter out non-duplicate rows

• Select the columns you want to check for duplicates in the SELECT statement

To add a column in copybook, modify the copybook definition and update all programs that use it.

• Identify the copybook that needs modification

• Add the new column to the copybook definition

• Update all programs that use the modified copybook

• Test the changes thoroughly before deploying to production

Odd even program in C

• Use modulus operator to check if a number is even or odd

• If the remainder is 0, the number is even, else it's odd

• Print the result accordingly

To raise a defect, follow these steps:

• Identify the defect and reproduce it if necessary

• Document the defect with a clear and concise description

• Assign a severity level to the defect

• Assign the defect to the appropriate team or individual

• Track the status of the defect until it is resolved

Inheritance is a way to create new classes based on existing classes. Encapsulation is the practice of hiding data and methods within a class. Data hiding is the act of making data private to prevent direct access.

• Inheritance allows for code reuse and promotes a hierarchical structure of classes.

• Encapsulation helps to prevent accidental modification of data and promotes modular code.

• Data hiding is achieved through...read more