TechVerito Consultant Interview Questions and Answers

Questions on abstract class vs interface, internal working of hashmap, and Java 8 features.

• Abstract class is a class that cannot be instantiated and can have both abstract and non-abstract methods.

• Interface is a collection of abstract methods and constants that can be implemented by a class.

• HashMap is a data structure that stores key-value pairs and uses hashing to retrieve values.

• Java 8 introduced features like lambda...read more

I come from a close-knit family that values education and hard work, with diverse backgrounds in engineering and teaching.

• My father is an engineer, which inspired my interest in technology.

• My mother is a teacher, emphasizing the importance of education.

• I have a younger sister who is pursuing a degree in computer science.

• Family gatherings often involve discussions about our respective fields.

Identify duplicate strings in an array using Java with efficient methods.

• Use a HashSet to track seen strings. Example: For array ['apple', 'banana', 'apple'], add 'apple' to HashSet and find duplicates.

• Utilize a HashMap to count occurrences. Example: For array ['apple', 'banana', 'apple'], map 'apple' to 2 and 'banana' to 1.

• Sort the array and check adjacent elements. Example: For array ['apple', 'banana', 'apple'], sor...read more