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Persistent Systems Software Engineer Interview Questions and Answers
84 Interview questions
An array in Python is a data structure that can hold multiple values of the same data type.
Arrays in Python are created using square brackets []
Elements in an array can be accessed using their index starting from 0
Example: names = ['Alice', 'Bob', 'Charlie']
Virtualization in C++ is the process of creating a virtual version of a class or function to allow for polymorphism and dynamic binding.
Virtualization in C++ is achieved through the use of virtual functions and inheritance.
Virtual functions are declared in a base class and overridden in derived classes to provide different implementations.
Virtualization allows for polymorphism, where a pointer to a base class can ...
A constructor in C++ is a special member function that initializes objects of a class.
Constructors have the same name as the class.
They do not have a return type, not even void.
Constructors can be overloaded to initialize objects in different ways.
Example: `ClassName() { // initialization code }`
Default constructor: `ClassName() { // default initialization }`
Parameterized constructor: `ClassName(int x) { // initia...
Copy assignment operator is a special member function in C++ that allows one object to be assigned the values of another object of the same class.
Copy assignment operator is denoted by the = operator.
It is used to copy the values of one object into another object of the same class.
It is automatically generated by the compiler if not explicitly defined.
Example: MyClass obj1; MyClass obj2; obj2 = obj1; // Copy assig...
Implement a custom String class in a programming language.
Define a class with necessary properties and methods to manipulate strings.
Include methods for concatenation, substring, length, etc.
Handle memory allocation and deallocation properly.
Example: class MyString { // implementation }
Smart pointers are advanced memory management tools in C++ that automate resource management and prevent memory leaks.
Types of smart pointers: std::unique_ptr, std::shared_ptr, std::weak_ptr.
std::unique_ptr: Owns a resource exclusively, cannot be copied, only moved.
std::shared_ptr: Allows multiple pointers to share ownership of a resource.
std::weak_ptr: Provides a non-owning reference to a resource managed by std:...
Use a hashmap to store word frequencies in a sentence.
Split the sentence into words using a space delimiter.
Create a hashmap to store word frequencies.
Iterate through the words and update the frequencies in the hashmap.
Return the hashmap with word frequencies.
Count the occurrences of each character in a string using a dictionary or hash map for efficient counting.
Use a dictionary to store character counts. Example: 'hello' -> {'h': 1, 'e': 1, 'l': 2, 'o': 1}.
Iterate through each character in the string and update the count in the dictionary.
Consider using collections.Counter for a more concise solution in Python.
Handle edge cases like empty strings or strings with s...
Two programming code examples in any language
Example 1: Python - print('Hello, World!')
Example 2: Java - System.out.println('Hello, World!')
Hands-on experience with SQL queries for creating and manipulating tables and table elements.
Use CREATE TABLE statement to create a new table
Use ALTER TABLE statement to add, modify, or delete columns in a table
Use INSERT INTO statement to add new rows of data into a table
Use UPDATE statement to modify existing data in a table
Use DELETE statement to remove rows from a table
Persistent Systems Software Engineer Interview Experiences
129 interviews found
Anonymous
Basic MCQs on General aptitude, logical reasoning and programming questions
(5 Questions)
- Q1. What is a constructor in C++?
- Q2. What is copy assignment operator?
- Ans.
Copy assignment operator is a special member function in C++ that allows one object to be assigned the values of another object of the same class.
Copy assignment operator is denoted by the = operator.
It is used to copy the values of one object into another object of the same class.
It is automatically generated by the compiler if not explicitly defined.
Example: MyClass obj1; MyClass obj2; obj2 = obj1; // Copy assignment...
- Q3. What is virtualization in C++?
- Ans.
Virtualization in C++ is the process of creating a virtual version of a class or function to allow for polymorphism and dynamic binding.
Virtualization in C++ is achieved through the use of virtual functions and inheritance.
Virtual functions are declared in a base class and overridden in derived classes to provide different implementations.
Virtualization allows for polymorphism, where a pointer to a base class can point...
- Q4. Implement String class
- Q5. What is smart pointers?
Skills evaluated in this interview
Selected
I applied via Campus Placement and was interviewed in Sep 2024. There were 3 interview rounds.
Aptitude, Technical MCQs
(3 Questions)
- Q1. Question on arrays
- Q2. Discussion about projects
- Q3. Calculator Program
- Ans.
A calculator program performs basic arithmetic operations like addition, subtraction, multiplication, and division.
Implement functions for each operation: add, subtract, multiply, divide.
Example: add(5, 3) returns 8.
Handle edge cases like division by zero.
Consider user input validation for robustness.
(2 Questions)
- Q1. Tell me about yourself
- Q2. Which technology are you interested to work in
- Ans.
I am interested in working with artificial intelligence and machine learning technologies.
Artificial Intelligence
Machine Learning
Natural Language Processing
Computer Vision
Pavan Kumar
I applied via Campus Placement
Aptitude exam and coding test
(2 Questions)
- Q1. Datatypes in java
- Ans.
Java has various datatypes like int, double, boolean, etc. to store different types of values.
Primitive datatypes include int, double, boolean, char, etc.
Reference datatypes include classes, interfaces, arrays, etc.
Examples: int num = 10; double price = 19.99; boolean isTrue = true;
- Q2. Write a star program
Skills evaluated in this interview
nl vinay kumar
Aptitude and two questions were there
(2 Questions)
- Q1. Oops concepts and sql
- Q2. Coding questions was asked to solve
You need to be very sharp. The question can be based on any DSA topic.
(5 Questions)
- Q1. The question will be related to your technology that you mention in your resume.
- Q2. First question was related to tree.
- Q3. It can be related to database.
- Q4. Software engineering
- Q5. Programming language
(2 Questions)
- Q1. Sql questions were asked
- Q2. Project questions were asked
Selected
I applied via Campus Placement and was interviewed in Mar 2024. There were 4 interview rounds.
It was Aptitude+Coding test for the fundamentals of Computers related topics such as CN,OS,SDLC,OOPS,DBMS,etc
(1 Question)
- Q1. It is technical1 and basically it was depends on your working technology such as python(MY ONE),OOPS concepts ,SQL as well as basic coding in data structures like Linked list,Searching techniques and too m...
(1 Question)
- Q1. It is technical2 and precisely on Some HR as well as project oriented questions to check our programming skills application in real-life.
(1 Question)
- Q1. Tell me about yourself? Tell me your hobbies? Why we choose you? Why persistent?
Interview Preparation Tips
- Computer Networking
- Python
- DSA
- OS
- SDLC
Selected
I appeared for an interview in Feb 2025, where I was asked the following questions.
- Q1. Tell me about yourself
- Q2. Python basic questions
Gurdeep Singh
Aptitude test normal questions
(2 Questions)
- Q1. Basic Question on Arrays
- Q2. Basic questions on string manipulation
(2 Questions)
- Q1. Internal Working of HashMap
- Ans.
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
HashMap internally uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
To retrieve a value, the key is hashed a...
- Q2. Core Java Questions
Skills evaluated in this interview
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