Opkey Trainee Quality Engineer Interview Questions and Answers

3 coding questions of moderate difficult

Q1. Coding questions asked in coding round
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Its was fully coding test using METTL platform in that there is only 1 session we need to attend having 6 questions all are Coding only. We don't need to complete all we can complete any of the question the time given was 1hr 30min in this i try to complete atleast 3 questions

Q1. In Technical interview they ask about Any programming language u prefer they will ask on that but most of java and paython is mandatory and more questions on java itself and about your project and all
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Q1. In HR round self introduction and about project discussion and they ask what they want to know about u and u r way of thinking about job
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It had 2 programming questions and 30 aptitude questions
it

Q1. Introduce yourself, educational background
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Q2. What languages are you familiar with
Ans. 
I am familiar with several programming languages including Java, Python, and C++.
• Proficient in Java and Python

• Familiar with C++ and JavaScript

• Experience with SQL and HTML/CSS

• Comfortable with object-oriented programming and data structures

• Continuously learning and exploring new languages and technologies
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Six coding questions to be solved within an hour. The coding questions were standard aptitude based and did not include any complex topics like Dynamic Programming or trees in my case.

Q1. I had to solve a problem. Given an expression involving operators and operands with parentheses, convert it to postfix expression. I used the stack data structure.
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Q1. A puzzle question
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Online coding test having basic problems and some aptitude problem.

Q1. Interviewer will ask opps and 2 basic coding problem 2 aptitude problem if you mention any technology in resume then ask about technology and projects
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Q2. What is opps ?
Ans. 
OOPs stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.
• OOPs focuses on creating objects that contain both data and methods to manipulate that data.

• Encapsulation, inheritance, polymorphism, and abstraction are key principles of OOPs.

• Examples of OOPs languages include Java, C++, and Python.
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Q3. What is singleton class ?
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A singleton class is a class that can only have one instance created and provides a global point of access to that instance.
• Singleton classes are often used for logging, caching, database connections, and thread pools.

• They typically have a private constructor to prevent instantiation from other classes.

• They provide a static method to access the single instance, which is created if it doesn't exist yet.
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