Punjab National Bank Senior Software Engineer Interview Questions and Answers

Duration : 1 hours
Question type : Greedy algo question(DSA)
Platform : of any choice

Q1. LLDs Designing on any system
Ans. 
LLDs are detailed design documents that describe the software architecture of a system.
• LLDs typically include detailed information on modules, components, interfaces, and data for a system.

• They help in understanding how different parts of the system interact and communicate with each other.

• Examples of LLDs include class diagrams, sequence diagrams, and data flow diagrams.

• LLDs are crucial for developers to implement the
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Q1. Coding plus behavioral plus LLD
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Q1. Tell me about yourself
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General knowledge and development skills and new things..

Q1. Difference between list and tuple
Ans. 
List is mutable, tuple is immutable in Python.
• List can be modified after creation, tuple cannot.

• List uses square brackets [], tuple uses parentheses ().

• List is used for collections of items that may change, tuple for fixed collections.

• Example: list - [1, 2, 3], tuple - (1, 2, 3)
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Island Perimeter and Number of Provinces. Basic Leetcode question

Q1. No. of islands
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Q2. Some hard DP problem
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Q1. What is Overlaoding and overriding?
Ans. 
Overloading is having multiple methods in the same class with the same name but different parameters. Overriding is implementing a method in a subclass that is already defined in the superclass.
• Overloading allows multiple methods with the same name but different parameters in the same class.

• Overriding involves implementing a method in a subclass that is already defined in the superclass.

• Overloading is resolved at compi
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Q2. What are the Java features?
Ans. 
Java features include object-oriented programming, platform independence, automatic memory management, and multithreading.
• Object-oriented programming: Java supports classes and objects, allowing for modular and reusable code.

• Platform independence: Java programs can run on any platform with the Java Virtual Machine (JVM).

• Automatic memory management: Java uses garbage collection to automatically manage memory allocation ...read more
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Q3. What is abstrack class?
Ans. 
Abstract class is a class that cannot be instantiated and may contain abstract methods.
• Cannot be instantiated directly

• May contain abstract methods that must be implemented by subclasses

• Used to define a common interface for subclasses
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Q1. How to find out prime number
Ans. 
Prime numbers are numbers that are only divisible by 1 and themselves.
• Start by checking if the number is less than 2, as prime numbers start from 2.

• Iterate from 2 to the square root of the number and check if the number is divisible by any of these numbers.

• If the number is not divisible by any number in the range, then it is a prime number.
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