iOPEX Technologies Technical Support Engineer Interview Questions and Answers

Round duration - 60 Minutes
Round difficulty - Medium

This round consisted of questions from DS/Algo , OOPS and Operating Systems primarily usage of some basic UNIX commands .

Q1. 
Kth Largest Number Problem Statement
You are given a continuous stream of numbers, and the task is to determine the kth largest number at any moment during the stream.
Explanation:
A specialized data st...read more
Ans. 
Design a data structure to find the kth largest number in a continuous stream of integers.
• Design a specialized data structure to handle an indefinite number of integers from the stream.

• Implement 'add(DATA)' to incorporate integers into the stream's pool.

• Implement 'getKthLargest()' to retrieve the kth largest number from the pool.

• Maintain the pool of numbers and return the kth largest number for each query.

• Ensure effici
Answered by AI
Add your answer
Q2. What is an interface?
Ans. 
An interface in software engineering is a contract that defines the methods that a class must implement.
• Defines a set of methods that a class must implement

• Provides a way to achieve abstraction and multiple inheritance

• Helps in achieving loose coupling between classes
Answered by AI
Add your answer
Q3. Can you explain the SOLID principles in Object-Oriented Design?
Ans. 
SOLID principles are a set of five design principles in object-oriented programming to make software designs more understandable, flexible, and maintainable.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable...read more
Answered by AI
Add your answer
Q4. Can you explain piping in Unix/Linux?
Ans. 
Piping in Unix/Linux allows the output of one command to be used as the input for another command.
• Piping is done using the '|' symbol

• It helps in connecting multiple commands together to perform complex operations

• Example: ls -l | grep 'txt' - This command lists all files in long format and then filters for files with 'txt' in their name
Answered by AI
Add your answer

Round duration - 60 Minutes
Round difficulty - Medium

This round had questions revolving around OS , Selenium and some common concepts from DBMS. The interviewer was quite experienced and made the whole interview quite wholesome for me.

Q1. Can you explain any 5 essential UNIX commands?
Ans. 
Essential UNIX commands include ls, cd, pwd, mkdir, and rm.
• ls - list directory contents

• cd - change directory

• pwd - print working directory

• mkdir - make directory

• rm - remove files or directories
Answered by AI
Add your answer
Q2. How do you enable Actuator in a Spring Boot application?
Ans. 
To enable Actuator in a Spring Boot application, you need to include the Actuator dependency in your pom.xml file and configure it in the application.properties file.
• Include Actuator dependency in pom.xml file

• Configure Actuator endpoints in application.properties file

• Access Actuator endpoints to monitor and manage the application
Answered by AI
Add your answer
Q3. What is dependency injection?
Ans. 
Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
• Allows for easier testing by providing mock dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: Constructor injection, Setter injection, Interface injection
Answered by AI
Add your answer
Q4. What are Self-Join and Cross-Join in the context of database management systems?
Ans. 
Self-Join is when a table is joined with itself, while Cross-Join is when every row from one table is combined with every row from another table.
• Self-Join is used to combine rows with other rows in the same table.

• Cross-Join generates a Cartesian product of the two tables involved.

• Self-Join is typically used to compare rows within the same table, like in hierarchical structures.

• Cross-Join is used when there is no common
Answered by AI
Add your answer
Q5. What are views in SQL?
Ans. 
Views in SQL are virtual tables that are generated based on the result set of a SELECT query.
• Views are saved SELECT queries that can be treated as tables.

• They can simplify complex queries by storing them as a view.

• Views do not store data themselves, but display data from the underlying tables.

• They can be used to restrict access to specific columns or rows of a table.

• Views can be used for data abstraction and security p
Answered by AI
Add your answer

Round duration - 30 Minutes
Round difficulty - Easy

This is a cultural fitment testing round .HR was very frank and asked standard questions. Then we discussed about my role.

Q1. Why should we hire you?
Add your answer
Q2. Why are you looking for a job change?
Add your answer

Q1. C#,asp.net mvc,.net core
Add your answer