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10+ NatWest Group Software Engineer Interview Questions and Answers

Updated 14 Feb 2025

Q1. How would you resolve a merge conflict if two developers are working on the same branch?

Ans.

Resolve merge conflict by communicating with the other developer, reviewing changes, and using version control tools.

  • Communicate with the other developer to understand their changes and discuss how to resolve the conflict.

  • Review the conflicting changes in the code to identify the differences and decide which changes to keep.

  • Use version control tools like Git to merge the changes manually or use tools like Git's merge tool to automatically resolve conflicts.

  • Test the merged cod...read more

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Q2. What is the purpose of the 'with' keyword in Python?

Ans.

The 'with' keyword in Python is used for resource management and ensures that clean-up actions are performed.

  • Used for managing resources like files, sockets, etc.

  • Automatically closes the resource when the block of code is exited

  • Helps in avoiding resource leaks and ensures proper clean-up

  • Follows the context management protocol

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Q3. Write a program to find the sum of the contiguous subarray within a one-dimensional array of numbers that has the largest sum.

Ans.

Program to find the sum of the contiguous subarray with the largest sum in a one-dimensional array.

  • Start with initializing variables for current sum and max sum as the first element of the array.

  • Iterate through the array, updating current sum by adding the current element or starting a new subarray.

  • Update max sum if current sum is greater, and continue until the end of the array.

  • Return the max sum as the result.

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Q4. Explain the Constructor, Destructor, Generators

Ans.

Constructor creates and initializes an object, Destructor destroys an object, Generators are functions that return iterators.

  • Constructor is a special method that is called when an object is created. It initializes the object's properties and allocates memory.

  • Destructor is a special method that is called when an object is destroyed. It frees up any resources that the object was using.

  • Generators are functions that use the yield keyword to return an iterator. They allow for lazy...read more

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Q5. How does Python handle memory

Ans.

Python uses automatic memory management through garbage collection.

  • Python uses reference counting to keep track of objects in memory.

  • When an object's reference count reaches zero, it is immediately deleted.

  • Python also uses a garbage collector to clean up circular references.

  • Memory allocation is handled by the Python memory manager.

  • Python provides tools like sys.getsizeof() to monitor memory usage.

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Q6. Write a program for Binary Search

Ans.

Program for Binary Search

  • Binary search is an efficient algorithm for finding an element in a sorted array.

  • It works by repeatedly dividing the search space in half.

  • The array must be sorted in ascending order for binary search to work.

  • The algorithm compares the target value with the middle element of the array.

  • If they are equal, the search is successful. If not, the search continues in the left or right half of the array.

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Q7. Bsics of python and spark

Ans.

Python is a high-level programming language used for various applications. Spark is a distributed computing framework for big data processing.

  • Python is easy to learn and has a large community for support.

  • Spark is used for processing large datasets and can handle data from various sources.

  • Python can be used with Spark to perform data analysis and machine learning tasks.

  • Spark provides APIs for programming in Java, Scala, and Python.

  • Python has libraries like NumPy, Pandas, and M...read more

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Q8. Explain Java code compile process

Ans.

Java code compile process involves several steps including preprocessing, compilation, and bytecode generation.

  • Java code is first preprocessed to handle import statements and macros.

  • The code is then compiled into bytecode using the Java compiler (javac).

  • The bytecode is platform-independent and can be executed on any Java Virtual Machine (JVM).

  • During compilation, the code is checked for syntax errors and type safety.

  • The compiled bytecode is stored in .class files.

  • At runtime, t...read more

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Q9. 2. What is OOPs

Ans.

OOPs stands for Object-Oriented Programming. It is a programming paradigm that uses objects to represent and manipulate data.

  • OOPs focuses on creating reusable code by organizing data and behavior into objects.

  • It emphasizes the concepts of encapsulation, inheritance, and polymorphism.

  • Objects are instances of classes, which define their properties (attributes) and behaviors (methods).

  • Inheritance allows classes to inherit properties and behaviors from other classes.

  • Polymorphism ...read more

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Q10. Current task in currents organisation

Ans.

Developing a new feature for the company's website to improve user experience.

  • Implementing front-end changes using React.js

  • Collaborating with UX designers to ensure design consistency

  • Testing the feature for bugs and performance issues

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Q11. Explain JVM, JRE, JDK

Ans.

JVM is a virtual machine that executes Java bytecode. JRE is a runtime environment that includes JVM and libraries. JDK is a development kit that includes JRE and tools for developing Java applications.

  • JVM stands for Java Virtual Machine and is responsible for executing Java bytecode.

  • JRE stands for Java Runtime Environment and includes JVM, libraries, and other components required to run Java applications.

  • JDK stands for Java Development Kit and includes JRE along with tools a...read more

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Q12. Reverse a link list

Ans.

Reverse a linked list

  • Iterate through the list and reverse the pointers

  • Use three pointers to keep track of current, previous, and next nodes

  • Update the head of the list to point to the last node

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Interview Process at NatWest Group Software Engineer

based on 21 interviews
4 Interview rounds
Resume Shortlist Round
Coding Test Round
Technical Round
HR Round
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