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A foreign key is a column or a group of columns in a database table that uniquely identifies a row in another table.
A foreign key establishes a relationship between two tables in a database.
It ensures referential integrity by enforcing a link between the data in the two tables.
Foreign keys help maintain data consistency and prevent orphaned records.
Example: In a database with tables for 'orders' and 'customers', the 'c...
DDL stands for Data Definition Language. It is used to define the structure of database objects.
DDL commands are used to create, modify, and delete database objects such as tables, indexes, and views.
Examples of DDL commands include CREATE, ALTER, and DROP.
DDL commands are not used to manipulate data within the database, that is done using DML (Data Manipulation Language) commands.
Types of constraints include primary key, foreign key, unique, check, and default constraints.
Primary key constraint ensures each row in a table is unique.
Foreign key constraint enforces referential integrity between two tables.
Unique constraint ensures that all values in a column are distinct.
Check constraint restricts the values that can be inserted into a column.
Default constraint provides a default value for a colu
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I applied via Campus Placement and was interviewed before Jul 2021. There were 4 interview rounds.
Aptitude test on CS subjects like C programming, DBMS, CN, and OS.
There were 2 input-output based questions of easy to moderate level
Every candidate was given an individual topic and was asked to speak on it
I applied via Company Website and was interviewed before Dec 2020. There were 4 interview rounds.
I applied via Referral and was interviewed before Jan 2021. There was 1 interview round.
I applied via Campus Placement and was interviewed before Feb 2021. There were 3 interview rounds.
Aptitude round consists Logical reasoning, General Aptitude, Grammar related questions etc. All are moderate level questions.
OOPs is a programming paradigm that uses objects to represent real-world entities. Java is an OOPs language.
OOPs stands for Object-Oriented Programming System
Java is a class-based OOPs language
Encapsulation, Inheritance, Polymorphism, and Abstraction are the four pillars of OOPs
Objects have state and behavior
Java supports interfaces, which allow for multiple inheritance
Example: A car can be represented as an object wit...
Java solves machine dependency by using bytecode and virtual machine.
Java code is compiled into bytecode which is platform-independent
The bytecode is executed by the Java Virtual Machine (JVM) which is platform-specific
JVM translates bytecode into machine code for the specific platform
This allows Java code to run on any platform with a JVM installed
Example: A Java program compiled on Windows can run on Linux or Mac as
I applied via Company Website and was interviewed before Jul 2021. There were 3 interview rounds.
Aptitude, reasoning, English, cloud sections
2 questions in which , one has to complete within an 50 minutes
I applied via Campus Placement and was interviewed before May 2021. There were 2 interview rounds.
Numerical ability and logical reasoning followed by some coding mcqs
Printing 1 to 100 without for loop
Use recursion to print numbers from 1 to 99
Print 100 outside the recursion
Use a base case to stop recursion at 100
I applied via Campus Placement and was interviewed before Jun 2021. There were 2 interview rounds.
Simple aptitude test
I applied via Company Website and was interviewed before Jul 2021. There were 2 interview rounds.
Attended the codevita competition in final year of college.
based on 2 interviews
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