Nekkanti Systems Interview Questions and Answers

Q1. What is polymorphism
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overloading and method overriding in object-oriented programming.
Answered by AI
Add your answer
Q2. Find missing number from nth number array.
Ans. 
Find missing number from nth number array.
• Iterate through the array and calculate the sum of all numbers

• Calculate the sum of numbers from 1 to n using the formula n*(n+1)/2

• Subtract the sum of array from the sum of numbers from 1 to n to find the missing number
Answered by AI
Add your answer
Q3. Explain inheritance and it types
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Inheritance allows a class to reuse code from another class.

• Types of inheritance include single inheritance, where a class inherits from only one parent class, and multiple inheritance, where a class inherits from multiple parent classes.

• Example: Class B inherits from Class A, so Class B can access
Answered by AI
Add your answer
Q4. Find 2nd max elements from aaray
Ans. 
Find 2nd max element from array of strings
• Sort the array in descending order

• Skip the first element (max element)

• Return the second element
Answered by AI
Add your answer

Coding Test consists of 3 Problem Question (2 Logical questions and 1 SQL Query ) and Around 20 MCQS
Platform - CoderByte

30 Aptitude Question
3 Mail Writing Question

Q1. Explain 1st Problem Solved in Coding Test. Optimize it.
Ans. 
Solved a sorting problem by implementing quicksort algorithm.
• Implemented quicksort algorithm to efficiently sort the array.

• Used recursion to divide the array into smaller subarrays and sort them individually.

• Optimized the algorithm by choosing a pivot element strategically to minimize comparisons.
Answered by AI
Add your answer
Q2. Explain 2nd Problem Solved in Coding Test. I failed 1 test case in 1st round which was told to solve again.
Add your answer
Q3. Explain 3rd Question based on SQL Query.
Ans. 
The 3rd question based on SQL query likely refers to a specific query or scenario related to SQL.
• Understand the context of the query being asked about

• Analyze the structure and purpose of the SQL query

• Explain the expected output or result of the query
Answered by AI
Add your answer
Q4. Write a code to Reverse Digits.
Ans. 
Code to reverse digits of a number
• Use modulo operator to extract the last digit of the number

• Multiply the result by 10 and add the next digit until all digits are reversed

• Handle negative numbers separately by converting to positive before reversing
Answered by AI
View 1 more answer
Q5. A problem question for solving a SQL Query.
Add your answer

Q1. Difference between wifi AC and Ax
Ans. 
Wifi AC is the 5th generation of wifi technology, while Wifi Ax is the 6th generation with improved speed and efficiency.
• Wifi AC operates on the 5 GHz band, while Wifi Ax operates on both 2.4 GHz and 5 GHz bands.

• Wifi Ax supports MU-MIMO (Multi-User, Multiple Input, Multiple Output) technology for better performance in crowded networks.

• Wifi Ax offers higher data rates and improved efficiency compared to Wifi AC.

• Wifi Ax ...read more
Answered by AI
Add your answer
Q2. What is called as DTIM?
Ans. 
DTIM stands for Delivery Traffic Indication Message, used in Wi-Fi networks to inform clients about the presence of buffered broadcast and multicast frames.
• DTIM is a parameter in the Wi-Fi beacon frame that indicates to clients how often they should wake up to receive broadcast and multicast traffic.

• It helps in saving battery life for devices by allowing them to sleep for longer periods of time.

• Clients can set their po...read more
Answered by AI
Add your answer

Q1. What do you mean by SEO?
Ans. 
SEO stands for Search Engine Optimization, which is the practice of increasing the quantity and quality of traffic to your website through organic search engine results.
• SEO involves optimizing your website to improve its visibility on search engines like Google.

• It includes keyword research, on-page optimization, link building, and content creation.

• The goal of SEO is to drive more organic traffic to your website and imp...read more
Answered by AI
Add your answer
Q2. What do you mean by Domain and hosting.
Ans. 
Domain is the address of a website, hosting is the service that stores the website's files and makes it accessible online.
• Domain is the unique address of a website on the internet, like www.example.com

• Hosting is the service that stores the website's files and data on a server, making it accessible online

• Domain registration is the process of purchasing and owning a domain name

• Web hosting providers offer different types ...read more
Answered by AI
Add your answer
Q3. Tell me something about your self?
Add your answer
Q4. What are the main SEO tools?
Ans. 
Some main SEO tools include Google Analytics, SEMrush, Ahrefs, Moz, and Screaming Frog.
• Google Analytics for tracking website traffic and user behavior

• SEMrush for keyword research and competitive analysis

• Ahrefs for backlink analysis and site auditing

• Moz for SEO insights and rank tracking

• Screaming Frog for website crawling and technical SEO analysis
Answered by AI
Add your answer
Q5. What is Google Adwords?
Ans. 
Google Adwords is an online advertising platform developed by Google, where advertisers pay to display brief advertisements, service offerings, product listings, video content, and generate mobile application installs within the Google ad network to web users.
• Online advertising platform by Google

• Advertisers pay to display ads

• Can display various types of ads like text, display, video, etc.

• Helps in reaching target audien
Answered by AI
Add your answer
Q6. What is Organic search?
Ans. 
Organic search refers to the unpaid search results generated by search engines based on relevance to the user's query.
• Organic search results are not influenced by paid advertising.

• Websites can improve their organic search rankings through search engine optimization (SEO) techniques.

• Examples of organic search results include links to websites, blogs, and articles that are deemed relevant to the user's search query.
Answered by AI
Add your answer
Q7. What do you mean by keywords?
Ans. 
Keywords are specific words or phrases that describe the content of a webpage and are used in SEO to help search engines understand the topic of the page.
• Keywords are used to optimize a website's content for search engines.

• They help search engines match a webpage to relevant search queries.

• Examples of keywords include 'SEO tips', 'best digital marketing agency', 'how to increase website traffic'.
Answered by AI
Add your answer
Q8. What is keywords analysis?
Ans. 
Keywords analysis is the process of researching and identifying the most relevant keywords for a website to improve its search engine rankings.
• Keywords analysis involves identifying popular search terms related to a website's content.

• It helps in understanding what keywords users are searching for and how competitive those keywords are.

• Tools like Google Keyword Planner can be used for keywords analysis.

• The goal is to se...read more
Answered by AI
Add your answer

Q1. Find the second largest element in array
Ans. 
Find the second largest element in an array of strings.
• Convert the strings to integers for comparison.

• Sort the array in descending order.

• Return the second element in the sorted array.
Answered by AI
Add your answer
Q2. Tell about oops in c++
Ans. 
Object-oriented programming concepts in C++
• Encapsulation: bundling data and methods that operate on the data together. Example: class Car { private: int speed; public: void accelerate() { speed++; } };

• Inheritance: creating new classes based on existing classes. Example: class ElectricCar : public Car { public: void charge() { cout << 'Charging...'; } };

• Polymorphism: ability to present the same interface for different d...read more
Answered by AI
Add your answer

2 coding questions were given , Running atleast one question with all test cases passing is mandatory.

Q1. Bit manipulation question(asked to write atleast pseudo code)
View 1 more answer
Q2. Array based question(asked to write atleast pseudo code)
Add your answer