NSE.IT India Operations Manager Interview Questions and Answers

Basic aptitude questions with problem solving, logical and reasoning questions

Explanation about oops concept with coding, loops and conditional statements.

Q1. Explain datawindow in powerbuilder
Ans. 
DataWindow is a GUI control in PowerBuilder used to display and manipulate data from a database.
• DataWindow can be used to retrieve data from a database, display it in a tabular format, and allow users to edit the data.

• It supports various data sources such as SQL, ODBC, and XML.

• DataWindow can also be used to create reports and graphs.

• It provides various features such as sorting, filtering, grouping, and computed columns...read more
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Round duration - 45 minutes
Round difficulty - Medium

I was asked 2 coding questions, questions from my projects and questions related to different java concepts. One question from cloud computing was also asked.

Q1. 
Maximum Subarray Sum Problem Statement
Given an array arr of length N consisting of integers, find the sum of the subarray (including empty subarray) with the maximum sum among all subarrays.
Explanation...read more
Ans. 
Find the sum of the subarray with the maximum sum among all subarrays in a given array.
• Iterate through the array and keep track of the current sum and maximum sum seen so far.

• If the current sum becomes negative, reset it to 0 as it won't contribute to the maximum sum.

• Return the maximum sum as the result.

• Example: For input arr = [-2, 1, -3, 4, -1], the maximum subarray sum is 4.
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Q2. 
Add Two Numbers as Linked Lists
You are given two singly linked lists, where each list represents a positive number without any leading zeros.
Your task is to add these two numbers and return the sum as ...read more
Ans. 
Add two numbers represented as linked lists and return the sum as a linked list.
• Traverse both linked lists simultaneously while keeping track of carry

• Create a new linked list to store the sum

• Handle cases where one list is longer than the other

• Consider edge cases like carry at the end of addition
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Round duration - 15 minutes
Round difficulty - Easy

It was a normal discussion about the role, the job expectations and about the company culture.

Used Mettl platform for test

Q1. What is the code to reverse a string without reversing its words in C++?
Ans. 
This code reverses the characters of a string while keeping the order of words intact in C++.
• Split the string into words using a space as a delimiter.

• Reverse the entire string to get the characters in reverse order.

• Reverse each individual word to restore their original order.

• Example: Input: 'Hello World' -> Output: 'dlroW olleH'
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Q2. What is the code implementation for deep copy and shallow copy in programming?
Ans. 
Deep copy creates a new object with copies of nested objects; shallow copy copies references to nested objects.
• Shallow Copy: Copies the object's reference, not the actual object. Example: `list2 = list1.copy()`.

• Deep Copy: Creates a new object and recursively copies all objects found in the original. Example: `import copy; list2 = copy.deepcopy(list1)`.

• Shallow Copy is faster but can lead to unintended side effects if th...read more
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Q3. What SQL query can be used to return results where the age is greater than 2?
Ans. 
Use a SQL query to filter records where age is greater than 2.
• Basic SQL syntax: SELECT column_name FROM table_name WHERE condition;

• Example query: SELECT * FROM users WHERE age > 2;

• This query retrieves all records from the 'users' table where the age column has values greater than 2.

• Ensure the 'age' column is of a numeric type to avoid errors.
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