Vertex Solutions Interview Questions and Answers

Swapping two numbers without using a third variable

• Use addition and subtraction to swap the values

• Use XOR operator to swap the values

• Use multiplication and division to swap the values

Cut the cake into quarters in the first attempt, then stack the quarters and cut them in half in the second attempt, resulting in 8 pieces.

• Cut the cake into quarters in the first attempt

• Stack the quarters on top of each other and cut them in half in the second attempt

• You will have 8 pieces of cake after the third attempt

Scenarios for completing voter registration process

• Online registration: Voter fills out form on official website

• In-person registration: Voter submits form at local election office

• Mail-in registration: Voter sends completed form by mail

• Same-day registration: Voter registers on election day at polling place

Functional testing focuses on the behavior of the system, while non-functional testing focuses on performance, usability, and security.

• Functional testing ensures that the system functions as expected based on the requirements.

• Non-functional testing evaluates the system's performance, usability, reliability, and security.

• Examples of functional testing include unit testing, integration testing, and system testing.

• Examples of non-functional testing include load testing, stress t...read more

OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.

• OOPS is a way of organizing and designing code around objects

• It emphasizes encapsulation, inheritance, and polymorphism

• Examples of OOPS languages include Java, C++, and Python

Joins in SQL are used to combine data from two or more tables based on a related column.

• Joins are used to retrieve data from multiple tables in a single query.

• There are different types of joins such as inner join, left join, right join, and full outer join.

• The join condition is specified using the ON keyword and the related columns.

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;