NatWest Group Senior Developer Interview Questions and Answers

Mcq+coding which are medium level questions

Q1. Multiple inheritance allowed in java?
Ans. 
No, multiple inheritance is not allowed in Java.
• Java does not support multiple inheritance for classes to avoid the diamond problem.

• However, multiple inheritance is allowed for interfaces in Java.

• Example: class A extends B, C is not allowed, but interface X extends Y, Z is allowed.
Answered by AI
Add your answer
Q2. Diff btw static and final
Ans. 
Static is used to define class-level variables and methods, while final is used to define constants and prevent inheritance or modification.
• Static variables and methods belong to the class itself, while final variables cannot be changed once initialized.

• Static members can be accessed without creating an instance of the class, while final members must be accessed through an instance.

• Static variables are shared among all...read more
Answered by AI
Add your answer
Q3. What is data encapsulation?
Ans. 
Data encapsulation is the concept of bundling data and methods that operate on the data into a single unit, known as a class.
• Encapsulation hides the internal state of an object and only exposes the necessary functionalities through methods.

• It helps in achieving data abstraction and information hiding.

• Example: A class 'Car' encapsulates data like speed, color, and methods like accelerate() and brake().
Answered by AI
Add your answer

Q1. Tell me about yourself
Ans. 
I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java, Python, and web development technologies

• Strong problem-solving skills

• Team player with excellent communication skills
Answered by AI
Add your answer
Q2. What are company core values
Ans. 
Company core values are the fundamental beliefs that guide the behavior and decisions of employees.
• Integrity - acting with honesty and transparency in all dealings

• Innovation - constantly seeking new and better ways to solve problems

• Customer focus - prioritizing the needs and satisfaction of customers

• Teamwork - collaborating effectively with colleagues to achieve common goals
Answered by AI
Add your answer

It was data structures and algorithm

Q1. What is friend function
Add your answer
Q2. Basic definitions of oops
Add your answer

Q1. Explain event driven architecture of node.js
Ans. 
Node.js uses event-driven architecture where events trigger callbacks to handle asynchronous operations.
• Node.js uses event loop to handle asynchronous operations efficiently

• Events are emitted by various objects in Node.js like HTTP servers, file system, etc.

• Callbacks are registered to handle events and execute code when events occur
Answered by AI
Add your answer

Q1. PLSQL basic to advanced.
Add your answer
Q2. Explain collections in details?
Ans. 
Collections in PL/SQL are data structures used to store multiple elements of the same data type.
• Collections can be nested tables, varrays, or associative arrays.

• Nested tables are like one-dimensional arrays with no upper bounds.

• Varrays are like arrays with a maximum size that is specified at declaration.

• Associative arrays are like lookup tables where each element is accessed using a unique key.

• Collections can be used t...read more
Answered by AI
Add your answer
Q3. Bulk collect concept
Ans. 
Bulk collect is a feature in PL/SQL that allows for fetching multiple rows of data at once.
• Improves performance by reducing context switches between the PL/SQL engine and SQL engine

• Reduces network traffic by fetching multiple rows in a single round trip

• Can be used with SELECT INTO or FETCH INTO statements
Answered by AI
Add your answer
Q4. Decode and case
Add your answer
Q5. Tuning of sql and some sql code
Add your answer

Bank product related questions and carrer expericnce .

1)Buy and sell stock
2)2 sum
3) system design
4) Elastic search
5) deployment

Q1. Explain Encapsulation
Ans. 
Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.
• Encapsulation helps in hiding the internal state of an object and only exposing necessary functionalities.

• It allows for better control over the data by preventing direct access from outside the class.

• Encapsulation also helps in achieving data abstraction and information hiding.

• Example: In a class representing a car, th...read more
Answered by AI
Add your answer
Q2. How to call rest API
Ans. 
To call a REST API, you can use tools like Postman or code in languages like JavaScript or Python.
• Use tools like Postman to make HTTP requests to the API endpoints

• In programming languages like JavaScript, use libraries like Axios or Fetch to make API calls

• Include necessary headers, parameters, and authentication tokens in the request

• Handle the response data accordingly, whether it's JSON, XML, or other formats
Answered by AI
Add your answer

Simple algorithm question about sorting

Q1. Algorith question about quick sort
Add your answer
Q2. Nlonn run time of the sort
Ans. 
The time complexity of the quicksort algorithm is O(n log n).
• Quicksort has an average time complexity of O(n log n).

• The best case time complexity of quicksort is O(n log n) when the pivot element divides the array into two equal halves.

• The worst case time complexity of quicksort is O(n^2) when the pivot element is the smallest or largest element in the array.
Answered by AI
Add your answer

Ms office,Core Java , Tally , C,

In my Opinion,view , If you ask me, As far as I can see/I am Concerned , It seems to me that , I think /feel/reckon/ belive , If you want my option , What we have to decide