Virtusa Software Services Lead Consultant Interview Questions and Answers

Python code to remove duplicates from a list of strings

• Use set() to remove duplicates from the list

• Convert the set back to a list to maintain the order of elements

• Example: input_list = ['apple', 'banana', 'apple', 'orange']

• Output: ['apple', 'banana', 'orange']

To find the top earning employee in a SQL table, you can use a SQL query with the MAX function on the salary column.

• Use a SQL query with the MAX function on the salary column to retrieve the highest salary in the table.

• Join the result with the employee table to get the details of the top earning employee.

• Example: SELECT * FROM employees WHERE salary = (SELECT MAX(salary) FROM employees);

Multiplying two tuples involves multiplying corresponding elements of each tuple and summing the results.

• Multiply the first element of the first tuple with the first element of the second tuple, then multiply the second element of the first tuple with the second element of the second tuple, and so on.

• Sum the results of the multiplications to get the final result.

• Example: (2, 3) * (4, 5) = (2*4) + (3*5) = 8 + 15 = 23

Generators produce values one at a time, while iterators are objects that allow iteration over a sequence of values.

• Generators are functions that can pause and resume execution, producing a sequence of values lazily.

• Iterators are objects that implement the Iterator protocol, allowing iteration over a sequence of values.

• Generators can be created using function* syntax in JavaScript, while iterators can be created using ...read more

Python supports single, multiple, and multilevel inheritance.

• Single inheritance: A class can inherit from only one parent class.

• Multiple inheritance: A class can inherit from multiple parent classes.

• Multilevel inheritance: A class can inherit from a derived class, creating a hierarchy.