Cloudkaptan Consultancy Services Interview Questions and Answers

Q1. Pillar of OOPs explain each parts.
Ans. 
Pillars of OOPs are four fundamental principles - Inheritance, Encapsulation, Abstraction, and Polymorphism.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.

• Polymorphism: Ability to present the same interface ...read more
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Q2. Types of constructor and demostrate it using code.
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There are two types of constructors in Java: default constructor and parameterized constructor.
• Default constructor has no parameters and is automatically created by the compiler if no constructor is defined.

• Parameterized constructor takes parameters and is used to initialize the object with specific values.
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Q3. Sorting of array in decending order and print 2nd smallest number without using inbuilt function.
Ans. 
Sort array in descending order, find 2nd smallest number without using inbuilt function.
• Iterate through the array and compare each element to find the smallest number.

• Then iterate again to find the second smallest number.

• Implement a sorting algorithm like bubble sort or selection sort to sort the array in descending order.
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Q4. Difference btw print and println in java
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print() prints the output without moving to the next line, while println() prints the output and moves to the next line.
• print() does not add a new line character at the end of the output

• println() adds a new line character at the end of the output

• Example: System.out.print("Hello"); // prints Hello without moving to the next line

• Example: System.out.println("World"); // prints World and moves to the next line
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Q5. Difference btw bubble sort and selection sort
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Bubble sort repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order. Selection sort selects the smallest element from the unsorted portion and swaps it with the first unsorted element.
• Bubble sort has a time complexity of O(n^2) in worst case, while selection sort has a time complexity of O(n^2) in all cases.

• Bubble sort is stable, meaning it preserves the relative orde...read more
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Q1. React, JavaScript questions along with some in-built JS methods questions
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Q1. React, JavaScript concepts along with some scenarios and what HTML+CSS solution to be provided in those scenarios
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The first round was an aptitude test that assessed basic quantitative, logical reasoning, and verbal ability. This round was crucial in filtering out candidates and required a good grasp of basic math, logical thinking, and comprehension skills. Time management was key, as the questions were numerous and diverse in nature.

The second round focused on coding skills, specifically in Java. Candidates were given 15 coding problems to solve within 90 minutes. The problems tested various aspects of data structure. Practicing competitive programming and familiarizing oneself with common algorithms and data structures can significantly help in this round.

Q1. The first technical interview was heavily focused on the core concepts of Java. Questions ranged from basic syntax and object-oriented programming (OOP) principles to more advanced topics such as multithre...read more
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Q1. The second technical interview delved deeper into Java and data structures. Questions were more challenging and required a solid grasp of data structures like arrays, linked lists, stacks, queues. Addition...read more
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Q1. The final HR round was a mix of technical and traditional HR questions. Surprisingly, this round included additional data structure and algorithm (DSA) questions, ensuring that the candidate's technical kn...read more
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Q2. 1.Do you use social media? What is the use of it? 2.Tell us about your hometown. 3.Why is your CGPA not very high? 4.What do you know about the Software 5.Development Life Cycle (SDLC)? 6.How will you cont...read more
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Yes, I use social media for networking and staying updated. I am from a small town with a close-knit community. My CGPA may not be high due to focusing on practical skills. I am familiar with SDLC and can contribute to Cloud Kaptan with my problem-solving abilities.
• I use social media for networking with professionals in the industry and staying updated on the latest trends.

• My hometown is a small town with a close-knit ...read more
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Q1. What is atomicity
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Atomicity refers to the property of a transaction in a database system that ensures all operations within the transaction are completed successfully or none at all.
• Atomicity ensures that all operations within a transaction are completed successfully or none at all

• If any operation within a transaction fails, the entire transaction is rolled back

• Example: transferring money from one account to another - either the full am...read more
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Q2. What is denormalization
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Denormalization is the process of adding redundant data to a database to improve read performance.
• Reduces the need for joins in queries

• Increases read performance at the expense of slower writes

• Commonly used in data warehousing and reporting applications
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