The Nuance Group AG Interview Questions and Answers

I use lambda expressions, streams, and default methods in my current project.

• Lambda expressions: I use them to write more concise and functional code.

• Streams: I use them for processing collections of data in a declarative way.

• Default methods: I use them to provide default implementations in interfaces.

The Java program counts the length of a string without using foreach and length function.

• Iterate through each character of the string using a for loop

• Increment a counter variable for each character encountered

• Return the counter variable as the length of the string

SQL query to find the 2nd highest salary of an employee.

• Use the SELECT statement to retrieve the salaries in descending order.

• Use the LIMIT clause to limit the result to the second row.

• Use the OFFSET clause to skip the first row.

• Combine the above steps in a single SQL query.

HashMap is an implementation of Map interface that stores key-value pairs using a hash table.

• HashMap uses hashing to store and retrieve elements.

• It uses an array of linked lists to handle collisions.

• The hash code of the key is used to determine the index of the array.

• If multiple keys have the same hash code, they are stored in the same linked list.

• When retrieving a value, the hash code is used to find the correct linked list and then linearly search for the key.

To avoid hash collisions, use a good hash function, increase the size of the hash table, and handle collisions using techniques like chaining or open addressing.

• Use a good hash function that distributes the keys evenly across the hash table.

• Increase the size of the hash table to reduce the chances of collisions.

• Handle collisions using techniques like chaining (using linked lists) or open addressing (probing).

• Chaining example: Store multiple values with the same hash key in a ...read more