LN Consultancy Interview Questions and Answers

Questions related to OOPS concepts in software engineering.

• Method overloading is having multiple methods with the same name but different parameters, while method overriding is having a method in a subclass with the same name and parameters as a method in its superclass.

• Inheritance is the ability of a class to inherit properties and methods from its parent class. It allows for code reuse and promotes modularity.

• Encapsu...read more

Answers to SQL related questions for Software Engineer interview

• Primary key uniquely identifies a record in a table, while unique key ensures that no two records have the same value for a specific column

• Normalization is used to eliminate data redundancy and improve data integrity. Types include 1NF, 2NF, 3NF, BCNF, 4NF, 5NF

• SQL queries can be used to retrieve data from one or more tables using joins. Delete and update s

A collection is a group of objects that can be stored, manipulated, and retrieved as a single unit.

• Concrete classes of collection include ArrayList, LinkedList, HashSet, and TreeSet.

• HashMap is a concrete class of the Map interface, which is a type of collection that stores key-value pairs.

• Other classes and interfaces in the collection framework include Queue, Stack, Vector, and Collection.