NCR Corporation Software Engineer II Interview Questions and Answers

2 coding and aptitude

Q1. All java based questions
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Q1. All java based questions
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Q1. To find sum of even numbers from given arraylist using stream api
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Using stream API to find the sum of even numbers from an ArrayList
• Convert the ArrayList to a stream using the stream() method

• Filter the stream to keep only the even numbers using the filter() method

• Use the mapToInt() method to convert the stream of even numbers to an IntStream

• Finally, use the sum() method to calculate the sum of the even numbers
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Q2. Oops ,java 8 concepts,exceptions,project discussions
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Q3. Which interface used to prevent SQL injection
Ans. 
Prepared Statements interface is used to prevent SQL injection.
• Prepared Statements interface is used to parameterize the SQL queries.

• It allows the separation of SQL code and user input.

• It helps to prevent SQL injection attacks by automatically escaping special characters.

• Examples: PDO, mysqli, Java PreparedStatement, etc.
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Q4. Why string is imutable
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String is immutable to ensure data integrity and thread safety.
• Immutable strings prevent accidental modification of data.

• Immutable strings allow for efficient memory allocation and sharing.

• Immutable strings ensure thread safety by avoiding race conditions.

• Examples of immutable string methods include substring, toLowerCase, and toUpperCase.
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Q5. Java oops concept and example each type
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Java OOPs concepts and examples
• Encapsulation - hiding data and methods within a class (e.g. private variables)

• Inheritance - creating new classes from existing ones (e.g. subclass extends superclass)

• Polymorphism - using a single method to perform different actions (e.g. method overloading/overriding)

• Abstraction - focusing on essential features and hiding implementation details (e.g. abstract classes/interfaces)
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You will be asked to develop an application and based on that the next round will be proceeded. For me I have been asked to perform some crud operations with api using asp.net core and asp.net mvc application

Q1. What is api and why do we use it
Ans. 
API is a set of protocols and tools for building software applications. It allows different applications to communicate with each other.
• API stands for Application Programming Interface

• It defines how different software components should interact with each other

• APIs can be used to access data or functionality from other applications or services

• Examples of APIs include Google Maps API, Twitter API, and Facebook API
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Q2. Difference between interface and abstract class
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Interface defines only method signatures while abstract class can have method implementations.
• An interface can be implemented by multiple classes while an abstract class can only be extended by one class.

• An abstract class can have constructors while an interface cannot.

• An abstract class can have instance variables while an interface cannot.

• An abstract class can provide default implementations for some methods while an ...read more
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Q3. How routing is performed in asp.net core api
Ans. 
Routing in ASP.NET Core API is performed using the built-in middleware called Endpoint Routing.
• Endpoint Routing is responsible for mapping incoming requests to the appropriate action methods in the controller.

• It uses the HTTP verb, URL pattern, and route data to determine the correct action method.

• Routes can be defined using attributes on the controller and action methods or in the Startup.cs file.

• Middleware like authe...read more
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Q4. What are solid principles
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SOLID principles are a set of design principles for writing maintainable and scalable software.
• S - Single Responsibility Principle

• O - Open/Closed Principle

• L - Liskov Substitution Principle

• I - Interface Segregation Principle

• D - Dependency Inversion Principle
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Q1. Why are you switching to this job
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Q2. What is your salary expectations
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Average to easy difficulty level.

Q1. Java code of string manipulation
Ans. 
String manipulation in Java involves various methods like substring, concat, replace, etc.
• Use substring() to extract a part of the string

• Use concat() to concatenate two strings

• Use replace() to replace a specific character or substring in a string
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Q2. What is the Java code for various types of sorting algorithms?
Ans. 
Various sorting algorithms in Java code
• Bubble Sort: int[] arr = {5, 2, 8, 1, 3}; Arrays.sort(arr);

• Selection Sort: int[] arr = {5, 2, 8, 1, 3}; Arrays.sort(arr);

• Insertion Sort: int[] arr = {5, 2, 8, 1, 3}; Arrays.sort(arr);

• Merge Sort: int[] arr = {5, 2, 8, 1, 3}; Arrays.sort(arr);

• Quick Sort: int[] arr = {5, 2, 8, 1, 3}; Arrays.sort(arr);
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Q3. Sql query and topics related to joins.
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Q1. About yourself and family
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Q2. What do you know about the company?
Ans. 
The company is a leading software development firm specializing in creating innovative solutions for various industries.
• Specializes in creating innovative software solutions

• Works with clients from various industries

• Known for high-quality and reliable products

• Has a strong team of software engineers and developers
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Q3. Can you provide examples of real-life scenarios where you handled conflicts with either a colleague or a manager?
Ans. 
Handled conflicts by addressing issues directly, seeking compromise, and maintaining professionalism.
• Addressed a disagreement with a colleague by scheduling a one-on-one meeting to discuss concerns and find common ground.

• Resolved a conflict with a manager by actively listening to their perspective, providing feedback, and working together to find a solution.

• Maintained professionalism during conflicts by staying calm, r...read more
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Q4. What actions would you take if your manager does not approve your product idea, and how would you attempt to persuade them?
Ans. 
I would gather more data to support my idea, present a compelling case to my manager, and be open to feedback and compromise.
• Gather data to support the idea, such as market research, user feedback, or cost-benefit analysis.

• Prepare a well-structured presentation highlighting the potential benefits of the product idea.

• Listen to the manager's concerns and feedback, and be open to making adjustments or compromises.

• Seek sup...read more
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Basic aptitudes question in online test

Two coding Q online test

Q1. Resume bsic Q asked
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Q2. Oops question basic theory
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Q1. One coding question asked to solve on paper of arrays
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Q2. Basic questions from resume
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Q1. Relocating related questions
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Q2. Why u want to join global logic
Ans. 
I want to join Global Logic because of their reputation for cutting-edge technology solutions and collaborative work environment.
• Global Logic is known for their innovative technology solutions

• I am impressed by the collaborative work environment at Global Logic

• I believe Global Logic offers great opportunities for professional growth and development
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Q1. Regarding all basic java , sprint boot questions
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Q2. More focused on Spring and microservices
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Q1. Advance java questions
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Basics of Sql Queries and Explain the Queries

Q1. SCD types of in ETL
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Q2. SQL Queries with some scenario based
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Q3. What is mean by index
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Q1. Explain advantages of Angular
Ans. 
Angular offers advantages such as two-way data binding, dependency injection, and modular architecture.
• Two-way data binding allows automatic synchronization of data between the model and the view, reducing the need for manual DOM manipulation.

• Dependency injection helps manage dependencies and promotes code reusability by allowing components to be easily injected with their dependencies.

• Modular architecture enables deve...read more
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Q2. Explain about ngmodel
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ngModel is a directive in AngularJS that binds the value of HTML controls to application data.
• ngModel is used for two-way data binding in AngularJS.

• It can be used with input, select, textarea, and custom form controls.

• Example:
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Q1. Java coding questions
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Q2. Core java and spring questions
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Q1. Salary expectation
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