Virtusa Consulting Services Backend Developer Interview Questions and Answers for Experienced

Remove duplicate objects from an array of multiple objects.

• Create a new array to store unique objects

• Loop through the original array and check if the object already exists in the new array

• If not, add it to the new array

• Return the new array

Maintain state by using a global variable or a state management system.

• Use a global variable to store the state and access it whenever needed.

• Use a state management system like Redux or MobX to manage the state.

• Avoid using local variables or closures to store state as they will be lost when the code is repeated.

• Consider using object-oriented programming principles to encapsulate state within objects.

• Use functional prog...read more

My dream is to build innovative software solutions that positively impact people's lives.

• Developing cutting-edge technology

• Creating user-friendly interfaces

• Solving complex problems

• Collaborating with talented individuals

• Making a difference in society

• Continuous learning and growth

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for polymorphism and inheritance.

• C++ has a standard template library (STL) which C does not have.

• C++ allows function overloading while C does not.

• C++ has exception handling while C does not.

For loop is used for iterating over a sequence while while loop is used for iterating until a condition is met.

• For loop is used when the number of iterations is known beforehand

• While loop is used when the number of iterations is not known beforehand

• For loop is faster than while loop for iterating over a sequence

• While loop is useful for iterating until a specific condition is met

• For loop can be used with range() functio...read more

To reverse a string without using any looping and inbuilt functions, we can use recursion.

• Create a function that takes a string as input.

• If the length of the string is 0 or 1, return the string.

• Otherwise, call the function recursively with the substring starting from the second character and concatenate the first character at the end.

• Return the reversed string.

• Example: reverseString('hello') returns 'olleh'.

A priority queue can be implemented using a single queue or multiple queues.

• One approach is to use a single queue and assign priorities to elements using a separate data structure.

• Another approach is to use multiple queues, each representing a different priority level.

• For example, if there are three priority levels, three queues can be used to implement the priority queue.

An array of objects can be used to implement a heterogeneous array.

• Each element in the array can be an object that represents a different data type.

• The objects can have different properties and methods based on their respective data types.

• For example, an element can be an object representing a string with a 'value' property and a 'length' method.

Developed a web-based inventory management system for a retail company.

• Used HTML, CSS, and JavaScript for the front-end development.

• Implemented a RESTful API using Node.js and Express for the back-end.

• Utilized a MySQL database to store and manage inventory data.

• Implemented features like product search, order management, and reporting.

• Ensured data security and user authentication using encryption and JWT.

• Collaborated wi...read more

The missing rupee is not actually missing. The calculation is misleading and does not account for the total amount paid.

• The initial amount paid by each person was Rs.10, totaling Rs.30.

• The owner gave them a discount of Rs.5, so they paid Rs.25 in total.

• The broker took Rs.2, leaving them with Rs.23.

• When the broker returned Rs.1 to each person, they each received Rs.1 back, totaling Rs.3.

• So, the total amount paid by the ...read more