Oyelabs Interview Questions and Answers

Q1. What is the diffrences between methlogies.
Ans. 
Different methodologies in business analysis include Agile, Waterfall, and Lean.
• Agile focuses on flexibility and collaboration, with iterative development cycles.

• Waterfall follows a linear approach with distinct phases like requirements, design, development, testing, and deployment.

• Lean aims to eliminate waste and improve efficiency by continuously improving processes.

• Each methodology has its own strengths and weakness...read more
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Q2. Have you worked with govt. client.
Ans. 
Yes, I have worked with government clients in the past.
• I have experience working with government agencies on various projects.

• I am familiar with the unique requirements and processes involved in government projects.

• I have successfully delivered solutions that met the specific needs of government clients.

• For example, I worked on a project for a government agency to improve their data analysis capabilities.
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They asked logical reasoning and some machin learning mcqs

Q1. Tell me something about your project
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Q2. What is convolution neural network algorithm?
Ans. 
Convolutional neural network (CNN) is a deep learning algorithm commonly used for image recognition and classification.
• CNN is designed to automatically and adaptively learn spatial hierarchies of features from input data.

• It uses convolutional layers to apply filters to input data, extracting features at different spatial locations.

• Pooling layers are used to reduce the spatial dimensions of the input data while retainin...read more
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Q3. How numpy works in the background?
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NumPy is a powerful library for numerical computing in Python, providing support for large, multi-dimensional arrays and matrices.
• NumPy uses C and Fortran libraries in the background for numerical computations, making it faster than pure Python.

• It provides a powerful N-dimensional array object and functions for performing various mathematical operations on arrays.

• NumPy arrays are stored in contiguous blocks of memory, ...read more
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Q1. 3 Basic DSA Questions
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Q2. 1st Math based coding question
Ans. Can solve with normal loops and some if-else statements.
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Q3. 2nd String based
Ans. String manipulation and Traversal meanwhile keep tracking the max answer.
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Q4. 3rd Array Sorting Algorithm
Ans. 
Quick Sort is a popular in-place sorting algorithm that uses divide and conquer approach.
• Divide the array into two sub-arrays based on a pivot element

• Recursively sort the sub-arrays

• Combine the sorted sub-arrays to get the final sorted array

• Time complexity: O(nlogn) in average case and O(n^2) in worst case

• Space complexity: O(logn)

• Example: [5, 2, 9, 3, 7, 6, 8] -> [2, 3, 5, 6, 7, 8, 9]
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Q5. There was an Introduction too in starting.
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Q1. Introduce Yourself
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I am a software enthusiast with a passion for coding and problem-solving.
• I have a degree in Computer Science and Engineering.

• I have experience in programming languages such as Java, Python, and C++.

• I have worked on projects involving web development, data analysis, and machine learning.

• I am a quick learner and enjoy working in a team environment.
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Q2. Why should I hire you?
Ans. 
I am a quick learner with a passion for software development and a strong work ethic.
• I have a solid understanding of programming concepts and experience with multiple programming languages.

• I am a team player and enjoy collaborating with others to solve problems.

• I am highly motivated and always strive to improve my skills and knowledge.

• I have completed several projects on my own and am eager to apply my skills in a prof
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Aptitude it is a type of test in which there are many questions like resigning, technical,blood relation.etc

In group discussion we have provided some topic and told discuss about that topic and tell advantages and dis advance.

Q1. What is final in java
Ans. 
final keyword in Java is used to restrict the user from changing the value of a variable, making it a constant.
• Final keyword can be applied to variables, methods, and classes

• Final variables cannot be reassigned once initialized

• Final methods cannot be overridden in subclasses

• Final classes cannot be extended
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Q2. What is static In java?
Ans. 
Static keyword in Java is used to create class-level variables and methods that can be accessed without creating an instance of the class.
• Static variables are shared among all instances of a class.

• Static methods can be called without creating an object of the class.

• Static blocks are used to initialize static variables.

• Example: public static int count = 0;
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Q3. The static it is a type of method called static method in which when we declared a method as static then it can't be inherited another class
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Comparatively tough. Goo questions with profit loss and other questions.

2 coding questions. Medium level questions. Can be solved if taken efforts.

Goes around for a 1-1.5 hrs. Have 3 topics toa be discussed.

Q1. Involves questions from aptitude as well as some analytical questions followed by java and sql concept questions also.
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Q2. Different between delete truncate
Ans. 
Delete removes rows from a table while truncate removes all rows from a table without logging individual row deletions.
• Delete is a DML command while truncate is a DDL command.

• Delete can be rolled back while truncate cannot be rolled back.

• Delete triggers delete triggers and delete constraints while truncate does not trigger them.

• Delete is slower than truncate as it logs individual row deletions.

• Example: DELETE FROM tabl...read more
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