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DSA based 1 ques and some mcqs on cs funda
Reverse a string without using inbuilt functions
Create a new array to store the reversed string
Iterate through the original string from end to start and append each character to the new array
Join the characters in the new array to form the reversed string
To find the mid of a linked list, use two pointers - one moving at double the speed of the other.
Initialize two pointers, slow and fast, at the head of the linked list.
Move the slow pointer by one node and the fast pointer by two nodes until the fast pointer reaches the end of the list.
The node pointed to by the slow pointer at this point is the mid of the linked list.
I applied via campus placement at Lovely Professional University (LPU) and was interviewed in Apr 2023. There were 4 interview rounds.
It was online assessment taken on Mercer mettl. It contained 10 MCQ from object oriented programming, computer networks, DBMS, os each. 1 coding question of medium level based on permutation and combinations. The assessment was of 1 hr.
The 4 pillars of object oriented programming are encapsulation, inheritance, polymorphism, and abstraction.
Encapsulation: Bundling data and methods that operate on the data into a single unit.
Inheritance: Creating new classes based on existing classes, allowing for code reuse.
Polymorphism: The ability for objects of different classes to respond to the same message.
Abstraction: Hiding the complex implementation details
MongoDB is a NoSQL database while SQL is a relational database management system.
MongoDB is schema-less, allowing for flexible data models.
SQL databases use structured query language for defining and manipulating data.
MongoDB is horizontally scalable, while SQL databases are vertically scalable.
SQL databases are better suited for complex queries and joins.
MongoDB is commonly used for big data and real-time applications...
posted on 18 Mar 2024
posted on 12 Sep 2024
I applied via Company Website and was interviewed in Aug 2024. There were 4 interview rounds.
They asked easy to medium DSA . It includes arrays, strings, recursion.
posted on 23 Nov 2024
posted on 9 Sep 2023
I applied via Naukri.com and was interviewed in Aug 2023. There were 2 interview rounds.
React hooks are functions that let you use state and other React features without writing a class.
Hooks are functions that let you use state and other React features in functional components
useState() is a hook that allows you to add state to functional components
useEffect() is a hook that allows you to perform side effects in functional components
useContext() is a hook that allows you to use the context API in functio
Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.
Subtypes must be substitutable for their base types.
Derived classes must be able to replace their base classes without affecting the program's behavior.
Violating this principle can lead to unexpected behavior and errors in the code.
Example: If a program expec...
Oops concept is a programming paradigm that focuses on objects and classes.
Oops stands for Object-Oriented Programming
Key concepts include inheritance, encapsulation, polymorphism, and abstraction
Examples: Class Car with properties like make, model, and methods like start(), stop()
Example: Inheritance - Class SUV extends Car and adds property numSeats
I applied via Referral and was interviewed before Jan 2023. There were 2 interview rounds.
Buttons are used when an action needs to be performed, while links are used for navigation.
Buttons are more suitable for actions like submitting a form, saving data, or triggering a function.
Links are used to navigate to different pages or sections within a website.
Buttons provide visual feedback when clicked, while links do not.
Buttons can be styled and customized more easily than links.
Buttons can have different stat
Optimize a SQL procedure with 5000 lines of code by identifying bottlenecks and implementing performance improvements.
Identify and analyze the most time-consuming parts of the procedure
Optimize queries by adding appropriate indexes, rewriting queries, or using query hints
Break down the procedure into smaller, more manageable parts
Use temporary tables or table variables to reduce the amount of data processed at once
Cons...
To optimize SQL procedures, keep them short, use small procedures with specific functionality, avoid temp tables and joins, use select statements wisely, avoid subqueries and dynamic SQL.
Break down complex procedures into smaller ones with specific functionality
Avoid using temporary tables and joins whenever possible
Use select statements wisely to retrieve only the necessary data
Avoid subqueries and find alternative ap...
posted on 27 Feb 2024
I applied via Naukri.com and was interviewed before Feb 2023. There was 1 interview round.
posted on 7 Aug 2024
I applied via Naukri.com and was interviewed in Jul 2024. There were 2 interview rounds.
Basics of C++. Solve some problem by given complexity. Find the bugs in code.
Design patterns in C++ are reusable solutions to common problems in software design.
Design patterns help in creating flexible, maintainable, and scalable code.
Examples of design patterns in C++ include Singleton, Factory, Observer, and Strategy.
Each design pattern has a specific purpose and can be applied in different scenarios.
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