10+ VIDEOCON NARMADA ELECTRONICS Interview Questions and Answers

Rearrange array in consecutive pair multiplication in descending order.

• Create a new array to store the multiplied values

• Use a loop to iterate through the original array and multiply consecutive pairs

• Write a compare function to sort the new array in descending order

Answers to common technical questions in a software engineering interview

• A transaction in DBMS is a sequence of operations that must be treated as a single unit of work. ACID properties ensure reliability and consistency of transactions.

• A thread is a lightweight process that shares memory and resources with other threads in the same process. A process is a separate instance of a program.

• Common Linux commands include ls, cd, mkdir, rm, and grep.

• sudo is used to run commands wit...read more

Design algorithm and database for seat booking system of BookMyShow and handle failed payments.

• Create a database with tables for movies, theaters, seats, bookings, and payments

• Use a locking mechanism to prevent double booking of seats

• If payment fails, release the locked seats and notify the user

• Write a query to get the timestamp in SQL: SELECT CURRENT_TIMESTAMP;

stoi() function converts a string to an integer.

• stoi() is a C++ function that takes a string as input and returns an integer.

• It is used to convert a string of digits into an integer.

• It can also handle negative numbers and ignore leading whitespace.

• Example: int num = stoi("123"); // num is now 123

Code for finding the longest common substring in an array of strings.

• Iterate through the first string and check for all possible substrings

• Check if the substring is present in all other strings

• Keep track of the longest common substring found so far

• Return the longest common substring

SEO standards include optimizing website content, using relevant keywords, and building quality backlinks.

• Optimize website content with relevant keywords and meta tags

• Ensure website is mobile-friendly and has fast loading speed

• Build quality backlinks from reputable sources

• Use descriptive and unique page titles and URLs

• Regularly update website content and add new pages

• Avoid duplicate content and keyword stuffing

• Utilize social media to promote website and increase visibility

Arrow functions are shorter syntax for writing function expressions.

• Arrow functions do not have their own 'this' keyword.

• They cannot be used as constructors.

• They cannot be used as methods in objects.

• They have implicit return statements.

• They have a more concise syntax than normal functions.

Higher-order components are functions that take a component and return a new component with additional functionality.

• Higher-order components (HOCs) are a pattern in React for reusing component logic.

• They are functions that take a component and return a new component with additional functionality.

• HOCs can be used for adding props, state, or lifecycle methods to a component.

• Examples of HOCs include connect() from React Redux and withRouter() from React Router.

Code to rearrange an array in maximum-minimum form.

• Sort the array in descending order.

• Create a new array and alternate between adding the maximum and minimum values from the sorted array.

• Return the new array.

• Time complexity: O(nlogn)

• Space complexity: O(n)

Find sum of k smallest numbers in a BST.

• Traverse the BST in-order and add the k smallest numbers to a sum variable.

• Use a priority queue to keep track of the k smallest numbers.

• If k is greater than the number of nodes in the BST, return the sum of all nodes.

• If k is 0, return 0.

Code splitting is a technique to split code into smaller chunks to improve performance.

• Code is divided into smaller chunks that can be loaded on demand

• Reduces initial load time and improves performance

• Used in modern web development frameworks like React, Angular, and Vue

• Example: splitting a large JavaScript file into smaller modules

Code for time stamp in C

• Use the time.h header file

• Call the time() function to get the current time in seconds

• Convert the time to a string using strftime() function

• Use the format string to specify the desired format of the time stamp

Tree shaking is a process of eliminating unused code in React applications.

• It is a part of the build process that removes dead code from the final bundle.

• It helps in reducing the size of the bundle and improving the performance of the application.

• It works by analyzing the code and identifying the parts that are not used.

• It is achieved through tools like webpack and babel.

• Example: If a component is not used in the application, tree shaking will remove it from the final bundle.

Reverses a linked list in groups of k

• Break the linked list into groups of k nodes

• Reverse each group individually

• Connect the reversed groups back together

Topological sort is a linear ordering of vertices in a directed acyclic graph.

• Topological sort is used to find a linear ordering of vertices in a directed acyclic graph.

• It is commonly implemented using depth-first search (DFS) algorithm.

• The algorithm starts by visiting a vertex and then recursively visits all its adjacent vertices before adding it to the result list.

• Topological sort is not possible if the graph has cycles.