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DDL stands for Data Definition Language, DML stands for Data Manipulation Language, and DQL stands for Data Query Language.
DDL is used to define the structure of database objects such as tables, indexes, and views.
DML is used to manipulate data in the database, such as inserting, updating, and deleting records.
DQL is used to retrieve data from the database using queries.
Examples: CREATE TABLE is a DDL statement, INSERT...
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I applied via Campus Placement and was interviewed in Mar 2023. There was 1 interview round.
Map and array in CPP are both data structures, but map is a key-value pair container while array is a collection of elements with a fixed size.
Map in CPP is a container that stores elements in key-value pairs, allowing fast lookups based on keys.
Array in CPP is a collection of elements of the same data type, stored in contiguous memory locations.
Generators in Python are functions that allow you to iterate over a sequen...
Relational Algebra is a procedural query language used to query databases in DBMS.
Relational Algebra is used to perform basic operations like selection, projection, join, etc. on relations.
It helps in retrieving specific information from databases based on certain conditions.
Examples of operations in Relational Algebra include Union, Intersection, Difference, Cartesian Product, etc.
posted on 8 Feb 2024
.NET Framework is a software framework developed by Microsoft that provides a runtime environment for building and running applications.
.NET Framework is a platform for developing and running applications on Windows.
It includes a large library of pre-built code and a runtime environment for executing applications.
It supports multiple programming languages such as C#, VB.NET, and F#.
It provides features like memory mana...
Joins in SQL are used to combine rows from two or more tables based on a related column between them.
There are different types of joins in SQL: inner join, left join, right join, and full outer join.
Inner join returns only the matching rows from both tables.
Left join returns all the rows from the left table and the matching rows from the right table.
Right join returns all the rows from the right table and the matching ...
posted on 25 Jul 2024
posted on 23 Jul 2024
A list of libraries used in software development.
Common libraries like React, Angular, jQuery
Backend libraries like Express, Django, Spring
Database libraries like Sequelize, SQLAlchemy, Hibernate
A physical file is a file stored on a physical storage device, such as a hard drive or solid-state drive.
Physical files are stored on physical storage devices like hard drives or SSDs.
They can be accessed and manipulated by software applications.
Examples include text documents, images, videos, and executable programs.
A batch job is a program that processes a large amount of data in a single run without user interaction.
Batch jobs are typically scheduled to run at specific times, often during off-peak hours.
They are commonly used for tasks such as data processing, report generation, and system maintenance.
Examples of batch job tools include cron in Unix/Linux systems and Task Scheduler in Windows.
An interactive job is a task or project that requires active participation and engagement from the user.
Interactive jobs involve real-time feedback and communication between the user and the system.
Examples include video games, online surveys, and interactive websites.
Users have control over the outcome of the task based on their input and decisions.
A pointer is a variable that stores the memory address of another variable.
Pointers are used to access and manipulate memory directly.
They are commonly used in programming languages like C and C++.
Example: int *ptr; // declares a pointer to an integer variable
posted on 11 Jul 2024
I applied via Campus Placement and was interviewed in Jun 2024. There were 4 interview rounds.
There were 5 sections which included one coding question, MCQs and one question on SQL
A process is an instance of a program running on a computer, while a thread is a unit of execution within a process.
A process has its own memory space, while threads within the same process share memory.
Processes are independent of each other, while threads within the same process can communicate with each other more easily.
Processes are heavyweight in terms of resource consumption, while threads are lightweight.
Exampl...
A round manhole lid cannot fall through the opening it covers, unlike other shapes.
Round shape is the only shape that cannot fall through its own opening
Round shape is easier to move and position compared to other shapes
Round shape is more structurally sound and can support heavy loads evenly
The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.
The OSI model consists of seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
In real software development, layers commonly used are the Application layer, Transport layer, and sometimes the Network layer.
For example, when developing a web applica...
posted on 15 Dec 2020
I applied via Walk-in and was interviewed in Nov 2020. There were 4 interview rounds.
posted on 17 Feb 2021
I applied via Referral and was interviewed before Feb 2020. There was 1 interview round.
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