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Primary key uniquely identifies each record in a table, while unique key ensures that each value in a column is unique.
Primary key does not allow NULL values, while unique key allows one NULL value.
A table can have only one primary key, but multiple unique keys.
Primary key automatically creates a unique index, while unique key does not.
Primary key is used to establish relationships between tables, while unique key is u
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posted on 9 May 2017
I appeared for an interview before May 2016.
I applied via Recruitment Consultant and was interviewed before Oct 2020. There were 3 interview rounds.
I applied via Naukri.com and was interviewed in Mar 2021. There was 1 interview round.
I applied via Campus Placement and was interviewed in Jan 2021. There were 6 interview rounds.
OOPS is a programming paradigm based on objects that have properties and methods.
Encapsulation: bundling of data and methods that operate on that data within a single unit
Inheritance: ability of a class to inherit properties and methods from a parent class
Polymorphism: ability of objects to take on many forms or have multiple behaviors
Abstraction: hiding of complex implementation details and showing only the necessary ...
Explanation of Super, Throw, Final and Finally
Super: used to call a method from a parent class
Throw: used to throw an exception
Final: used to declare a constant or to prevent method overriding
Finally: used to execute code after try-catch block, regardless of exception
I applied via Referral and was interviewed in Sep 2022. There were 3 interview rounds.
I am a motivated and enthusiastic individual with a strong passion for learning and gaining practical experience in the field of [Intern position].
I am currently pursuing a degree in [relevant field] at [university]
I have completed internships at [company/organization] where I gained valuable skills in [relevant skills]
I am proficient in [relevant software/tools] and have experience in [relevant tasks/responsibilities]
...
I have a Bachelor's degree in Computer Science and currently pursuing a Master's degree in Data Science.
Bachelor's degree in Computer Science
Currently pursuing a Master's degree in Data Science
I can join within 2 weeks.
I have completed all my academic commitments and can start immediately.
I just need to give a two-week notice to my current employer.
I am flexible and can adjust my start date based on your requirements.
DBMS stands for Database Management System. It is a software system that allows users to define, create, maintain and control access to databases.
DBMS is used to manage large amounts of data efficiently.
It provides a way to store, retrieve and manipulate data in a structured way.
Examples of popular DBMS include MySQL, Oracle, and Microsoft SQL Server.
DBMS can be used in various applications such as banking, healthcare,...
I applied via Recruitment Consulltant and was interviewed before Mar 2022. There were 6 interview rounds.
I applied via Naukri.com and was interviewed in Mar 2023. There were 2 interview rounds.
OOPs concepts in Java include inheritance, polymorphism, encapsulation, and abstraction.
Inheritance allows a subclass to inherit properties and methods from a superclass.
Polymorphism allows objects to take on multiple forms and behave differently based on their context.
Encapsulation hides the implementation details of an object and only exposes necessary information.
Abstraction allows for the creation of abstract class...
Interfaces define contracts for behavior, while inheritance allows for code reuse and polymorphism.
Interfaces allow for loose coupling and abstraction, enabling multiple implementations of the same behavior.
Inheritance allows for code reuse and extension of existing classes, reducing code duplication.
Polymorphism allows objects of different classes to be treated as if they were of the same class, simplifying code and i
SQL query for joining tables
Use JOIN keyword to combine two or more tables based on a related column
Specify the columns to be selected using SELECT keyword
Use ON keyword to specify the condition for joining the tables
Different types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN
Used Java concepts such as inheritance, polymorphism, and exception handling in my project.
Implemented inheritance to create a base class and derived classes with specific functionalities.
Utilized polymorphism to allow objects of different classes to be treated as if they were of the same class.
Implemented exception handling to handle errors and prevent program crashes.
Used interfaces to define a set of methods that a ...
Overloading is having multiple methods with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
Overloading is used to provide different ways to call a method with different parameters
Overriding is used to provide a specific implementation of a method in a subclass
Overloading is resolved at compile-time while overriding is r...
I applied via Campus Placement and was interviewed before Apr 2023. There were 2 interview rounds.
Normal apptitude queations were asked in this round
based on 1 interview
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