Persistent Systems Software Engineer Interview Questions, Process, and Tips

Basic MCQs on General aptitude, logical reasoning and programming questions

Q1. What is a constructor in C++?
Ans. 
A constructor in C++ is a special member function that is automatically called when an object is created.
• Constructors have the same name as the class and do not have a return type.

• They can be used to initialize the object's data members.

• Default constructors are automatically generated if no constructor is defined.

• Parameterized constructors can be defined to accept arguments during object creation.
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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
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Q3. What is virtualization in C++?
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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...read more
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Q4. Implement String class
Ans. 
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 }
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Q5. What is smart pointers?
Ans. 
Smart pointers are objects that act like pointers but provide automatic memory management.
• Smart pointers help prevent memory leaks by automatically deallocating memory when no longer needed.

• Examples include unique_ptr, shared_ptr, and weak_ptr in C++.

• They provide better memory safety compared to raw pointers.
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Aptitude, Technical MCQs

Q1. Question on arrays
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Q2. Discussion about projects
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Q3. Calculator Program
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Q1. Tell me about yourself
Ans. 
I am a software engineer with 5 years of experience in developing web applications using Java, Spring, and Angular.
• 5 years of experience in software development

• Proficient in Java, Spring, and Angular

• Strong problem-solving skills

• Experience in developing web applications
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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
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Aptitude exam and coding test

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;
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Q2. Write a star program
Ans. 
A star program prints a pattern of stars in a specific shape.
• Use nested loops to control the number of rows and columns

• Use if-else statements to determine when to print a star or a space

• Example: Print a pyramid of stars with 5 rows
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Aptitude and two questions were there

Q1. Oops concepts and sql
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Q2. Coding questions was asked to solve
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