NCR Corporation Software Engineer Intern Interview Questions and Answers

Q1. Manual testing and business banking domain
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Q2. Automation testing
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2 dsa questions
1st is based on strings (easy)
2nd one ie based on hashmaps (medium)

Q1. IP address validation dsa
Ans. 
Validating IP addresses involves checking format and range for both IPv4 and IPv6 addresses.
• IPv4 addresses consist of four octets separated by dots (e.g., 192.168.1.1). Each octet must be between 0 and 255.

• IPv6 addresses are represented as eight groups of four hexadecimal digits, separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).

• Leading zeros in octets are not allowed in IPv4 (e.g., 192.168.01.1 is in...read more
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Q2. Oops question SQL query on employee database
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Q1. Managerial round With questions about Linux commands Behavioral questions Questions about past projects
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Round duration - 60 minutes
Round difficulty - Medium

Technical Interview round with questions on DSA and DBMS.

Q1. 
Merge Sort Problem Statement
You are given a sequence of numbers, ARR. Your task is to return a sorted sequence of ARR in non-descending order using the Merge Sort algorithm.
Explanation:
The Merge Sort...read more
Ans. 
Implement Merge Sort algorithm to sort a sequence of numbers in non-descending order.
• Divide the input array into two halves recursively until each array has only one element.

• Merge the sorted halves to produce a completely sorted array.

• Time complexity of Merge Sort is O(n log n).
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Q2. 
Search In Rotated Sorted Array Problem Statement
Given a rotated sorted array ARR of size 'N' and an integer 'K', determine the index at which 'K' is present in the array.
Note:
1. If 'K' is not present...read more
Ans. 
Given a rotated sorted array, find the index of a given integer 'K'.
• Use binary search to efficiently find the index of 'K'.

• Consider the rotation of the array while performing the search.

• Handle cases where 'K' is not present in the array by returning -1.
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Q3. Write a query to find the nth highest salary from a database.
Ans. 
Query to find the nth highest salary from a database
• Use ORDER BY and LIMIT in the query

• Consider handling ties if multiple employees have the same salary

• Example: SELECT DISTINCT salary FROM employees ORDER BY salary DESC LIMIT n-1, 1
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Round duration - 60 minutes
Round difficulty - Easy

Questions based on OOPS and Software Lifecycle were asked in this round.

Q1. Can you explain the OOP concepts?
Ans. 
OOP concepts are fundamental principles in object-oriented programming that help in organizing and designing code.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: The ability for objects of different classes to respond to the same message in different ways.

• Abstraction: Hiding the...read more
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Q2. Can you explain the access modifiers in Java?
Ans. 
Access modifiers in Java control the visibility and accessibility of classes, methods, and variables.
• There are four types of access modifiers in Java: public, private, protected, and default.

• Public: accessible from any other class.

• Private: accessible only within the same class.

• Protected: accessible within the same package and subclasses.

• Default: accessible only within the same package.

• Example: public class MyClass { pr...read more
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Q3. What is Scrum methodology?
Ans. 
Scrum is an agile methodology used in software development for managing and completing complex projects.
• Scrum involves breaking down projects into small, manageable tasks called sprints.

• It emphasizes frequent communication and collaboration among team members.

• Scrum uses daily stand-up meetings to track progress and address any obstacles.

• Roles in Scrum include Product Owner, Scrum Master, and Development Team.

• Popular to...read more
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Round duration - 30 minutes
Round difficulty - Easy

The last round was managerial round.