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Persistent Systems Software Developer Interview Questions and Answers
32 Interview questions
SOLID principles are a set of five design principles that help make software designs more understandable, flexible, and maintainable.
Single Responsibility Principle (SRP) - A class should have only one reason to change.
Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modification.
Liskov Substitution Principle (LSP) - Objects of a superclass should be replaceable with obje...
Summation of numbers in an IntStream
Use the 'sum()' method on the IntStream to calculate the sum of numbers
Ensure the IntStream is properly initialized with numbers before calling 'sum()'
Example: IntStream numbers = IntStream.of(1, 2, 3, 4, 5); int sum = numbers.sum();
SQL injection is a type of cyber attack where malicious SQL code is inserted into input fields to manipulate a database.
SQL injection occurs when a user input is not properly sanitized and allows an attacker to execute malicious SQL commands.
It can lead to unauthorized access to sensitive data, data loss, and even complete server takeover.
Example: Entering ' OR '1'='1' into a login form to bypass authentication an...
Persistent Systems Pvt Ltd is known for its innovative solutions, strong work culture, and opportunities for growth.
Strong reputation for delivering innovative solutions
Positive work culture that fosters growth and learning
Opportunities for career advancement and skill development
Global presence with diverse projects and clients
Explain the logic and provide code for a software development problem.
Understand the problem statement clearly before coding.
Break down the problem into smaller, manageable parts.
Use pseudocode to outline the logic before writing actual code.
Consider edge cases and how your code will handle them.
Test your code with various inputs to ensure it works as expected.
Object-Oriented Programming (OOP) is a programming paradigm based on the concept of objects, which can contain data and methods.
Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class).
Inheritance: Mechanism where a new class inherits properties and behavior from an existing class (e.g., a 'Dog' class inheriting from an 'Animal' class).
Polymorphism: Ability to present the s...
Object-oriented programming concepts that focus on objects and classes to organize code and improve reusability and maintainability.
Encapsulation: Bundling data and methods that operate on the data into a single unit (class).
Inheritance: Ability of a class to inherit properties and behavior from another class.
Polymorphism: Ability to present the same interface for different data types.
Abstraction: Hiding the compl...
Garbage collection is a process in programming where the system automatically reclaims memory occupied by objects that are no longer in use.
Garbage collection helps in managing memory efficiently by automatically deallocating memory that is no longer needed.
It reduces the risk of memory leaks and helps in preventing bugs related to manual memory management.
Examples of programming languages with garbage collection ...
1NF and 2NF are normalization forms in database design to reduce redundancy and improve data integrity.
1NF (First Normal Form) ensures that each column in a table contains atomic values and there are no repeating groups.
2NF (Second Normal Form) builds on 1NF by ensuring that all non-key attributes are fully functional dependent on the primary key.
For example, if we have a table 'Orders' with columns 'OrderID', 'Pr...
A program demonstrating virtual function in C++
Create a base class with a virtual function
Create derived classes that override the virtual function
Instantiate objects of derived classes and call the virtual function
Persistent Systems Software Developer Interview Experiences
35 interviews found
Anonymous
(2 Questions)
- Q1. What is a comparator?
- Ans.
A comparator is a function that compares two objects to determine their ordering.
Used in sorting algorithms to determine the order of elements
Returns a negative value if the first object is less than the second, zero if they are equal, and a positive value if the first object is greater
Commonly used in Java with the Comparator interface
- Q2. What is reentrant lock?
- Ans.
A reentrant lock is a synchronization primitive that allows a thread to re-enter a critical section it already holds.
Prevents deadlock by allowing a thread to acquire the lock multiple times
Each lock acquisition must be followed by a corresponding release
Commonly used in multi-threaded programming to protect shared resources
Yashwant Patidar
(2 Questions)
- Q1. Oops concept and project details
- Q2. Inheritance and Overriding and overloading
(2 Questions)
- Q1. OOPs concept and abstraction
- Q2. Encapsulation, inheritance and project deatils
(3 Questions)
- Q1. Dbms and os basic questions
- Q2. Cn and basic coding questions
- Q3. Asked about salesforce etc
Medium level leetcode questions
(2 Questions)
- Q1. Tell me about yourself
- Ans.
I am a passionate software developer with experience in building web applications using various technologies.
Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular
Proficient in backend development with Node.js and databases like MongoDB and MySQL
Familiar with version control systems like Git and deployment tools like Heroku
Strong problem-solving skills and ability ...
- Q2. Why persistent systems pvt ltd
- Ans.
Persistent Systems Pvt Ltd is known for its innovative solutions, strong work culture, and opportunities for growth.
Strong reputation for delivering innovative solutions
Positive work culture that fosters growth and learning
Opportunities for career advancement and skill development
Global presence with diverse projects and clients
(2 Questions)
- Q1. Summation of numbers in an IntStream
- Ans.
Summation of numbers in an IntStream
Use the 'sum()' method on the IntStream to calculate the sum of numbers
Ensure the IntStream is properly initialized with numbers before calling 'sum()'
Example: IntStream numbers = IntStream.of(1, 2, 3, 4, 5); int sum = numbers.sum();
- Q2. Strategy Design Pattern
Skills evaluated in this interview
(1 Question)
- Q1. What is abstract class Difference between final,finally finalize Different types of polymorphism
- Ans.
Abstract class is a class that cannot be instantiated and may contain abstract methods.
Abstract class cannot be instantiated directly.
It may contain abstract methods that must be implemented by the subclass.
Example: abstract class Shape { abstract void draw(); }
(2 Questions)
- Q1. I was asked to solve a puzzle and solve a coding question. I solved both but don't know why I was not selected.
- Q2. 1 puzzle 1 coding question related to pattern
Skills evaluated in this interview
Abhishek Kumar Pandey
Goods questions were asked on problem solving.
(2 Questions)
- Q1. Goroutines, Channels,
- Q2. Heap data structures
(2 Questions)
- Q1. Search sort algo
- Q2. Oops concept
Jayesh Giradkar
I applied via Job Portal
(3 Questions)
- Q1. What is oops concepts?
- Ans.
Object-oriented programming concepts that focus on objects and classes to organize code and improve reusability and maintainability.
Encapsulation: Bundling data and methods that operate on the data into a single unit (class).
Inheritance: Ability of a class to inherit properties and behavior from another class.
Polymorphism: Ability to present the same interface for different data types.
Abstraction: Hiding the complex im...
- Q2. What is garbage collection ?
- Ans.
Garbage collection is a process in programming where the system automatically reclaims memory occupied by objects that are no longer in use.
Garbage collection helps in managing memory efficiently by automatically deallocating memory that is no longer needed.
It reduces the risk of memory leaks and helps in preventing bugs related to manual memory management.
Examples of programming languages with garbage collection inclu...
- Q3. Encapsulation, polymorphism
Sumit Kumar
I applied via Job Portal
Easy aptitude question based on reasoning
Easy questions consists questions on arrays linkedlist.
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