10+ HDFC Bank Interview Questions and Answers

Minimum number of comparisons required to determine one of the heavier coin among 9 identical coins.

• Divide the coins into groups of 3.

• Weigh any two groups against each other.

• If they are equal, the heavier coin is in the third group.

• If one group is heavier, weigh two coins from that group against each other.

• If they are equal, the heavier coin is the remaining one.

• If one coin is heavier, that is the answer.

Binary search algorithm should be used to minimize time complexity.

• Binary search algorithm has a time complexity of O(log n).

• It is efficient for searching in a sorted array.

• The algorithm works by repeatedly dividing the search interval in half.

• Example: If the array is [1, 3, 5, 7, 9] and we want to insert 6, we can use binary search to find the index where 6 should be inserted.

• Once we find the index, we can shift the elements to the right and insert the new element.

• This will ...read more

Program to calculate no. of comparisons required based on no. of coins input.

• Create a function that takes the input of no. of coins

• Use a loop to compare each coin with every other coin

• Increment the comparison count for each comparison made

• Return the total comparison count

Growth is the process of developing and improving oneself or something over time.

• Growth involves continuous learning and development

• It can be personal, professional, or organizational

• It requires setting goals and working towards them

• Examples include learning new skills, expanding one's network, and increasing revenue

• Growth is essential for success and fulfillment

SQL joins are used to combine data from two or more tables based on a related column between them.

• Inner join: returns only the matching rows from both tables

• Left join: returns all the rows from the left table and matching rows from the right table

• Right join: returns all the rows from the right table and matching rows from the left table

• Full outer join: returns all the rows from both tables, with NULL values in the columns where there is no match

• Cross join: returns the Cartesi...read more

3DPLM is a leading software development company with a strong focus on innovation and growth.

• 3DPLM offers exciting opportunities to work on cutting-edge technologies and projects.

• The company has a great work culture and provides ample learning and development opportunities.

• 3DPLM has a strong reputation in the industry and is known for delivering high-quality software solutions.

• Working at 3DPLM provides exposure to a diverse range of clients and industries.

• The company values i...read more

SDLC stands for Software Development Life Cycle. It is a process used to design, develop, and test software applications.

• SDLC is a structured approach to software development.

• It consists of several phases including requirements gathering, design, coding, testing, and maintenance.

• Each phase has specific deliverables and activities.

• SDLC models include Waterfall, Agile, and DevOps.

• Example: In the requirements gathering phase, the software developer works with stakeholders to und...read more

OOPs is a programming paradigm based on the concept of objects that interact with each other.

• OOPs stands for Object-Oriented Programming.

• It focuses on creating objects that have properties and methods.

• Encapsulation, Inheritance, and Polymorphism are the three main pillars of OOPs.

• Encapsulation is the process of hiding the implementation details of an object.

• Inheritance allows a new class to be based on an existing class.

• Polymorphism allows objects of different classes to be t...read more

Use quicksort algorithm to sort the list with minimum time and space complexity.

• Implement quicksort algorithm

• Choose a pivot element and partition the array

• Recursively sort the sub-arrays

• Time complexity: O(nlogn)

• Space complexity: O(logn)

There are approximately 500 petrol pumps in Pune.

• The number of petrol pumps in Pune can be estimated based on the population density and vehicle ownership rate.

• Pune has a population of around 3.1 million and a high vehicle ownership rate, which suggests a large number of petrol pumps.

• There are also several major highways and roads that run through Pune, which would require more petrol pumps to serve the traffic.

• However, the exact number of petrol pumps in Pune is difficult to...read more

Use cases for testing a form

• Testing form validation by entering invalid data

• Testing form submission with all required fields filled

• Testing form submission with some optional fields filled

• Testing form submission with special characters in input fields

• Testing form submission with maximum character limits in input fields

• Testing form submission with empty fields

• Testing form submission with different combinations of input data