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Persistent Systems
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Object-oriented programming concepts that focus on data encapsulation, inheritance, polymorphism, and abstraction.
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 implementation detai...
super is used to refer immediate parent class instance variable or method, while this is used to refer current class instance variable or method.
super is used to access parent class members, while this is used to access current class members
super keyword is used to invoke parent class constructor, while this keyword is used to invoke current class constructor
super keyword is used to differentiate between parent and chi...
Yes, we can call queueable class from batch class.
Batch class can call a queueable class to perform additional processing after the batch job completes.
Queueable class can be called from the finish method of the batch class.
This allows for asynchronous processing of data.
Example: Batch class processes records and calls a queueable class to send email notifications.
Persistent Systems interview questions for designations
I applied via Naukri.com and was interviewed before Feb 2023. There were 2 interview rounds.
A simple program to print 'Hello, World!'
Declare a string variable to store the message
Assign the value 'Hello, World!' to the variable
Print the value of the variable
I applied via Recruitment Consulltant and was interviewed before Aug 2022. There were 5 interview rounds.
What people are saying about Persistent Systems
I applied via Referral
Data structures are a way to organize and store data efficiently.
Data structures are used to store and manipulate data in a structured manner.
They provide different ways to access and perform operations on the data.
Examples include arrays, linked lists, stacks, queues, trees, and graphs.
Developed a web-based project management tool for tracking tasks and deadlines
Used React.js for front-end development
Implemented RESTful APIs using Node.js and Express for back-end
Utilized MongoDB for database management
Incorporated user authentication and authorization features
Integrated real-time notifications using Socket.io
My name is John Smith.
Full name is John Smith
Common name in English-speaking countries
Easy to remember and pronounce
The question is unrelated to the medical field and is not a puzzle or riddle.
The question is asking about the meaning of the interviewer's name.
You can ask the interviewer about the origin or cultural significance of their name.
You can also mention that names often have different meanings in different languages or cultures.
My strengths include problem-solving skills, attention to detail, and strong communication abilities.
Strong problem-solving skills - I enjoy tackling complex issues and finding creative solutions.
Attention to detail - I am meticulous in my work and strive for accuracy in all tasks.
Strong communication abilities - I can effectively convey ideas and collaborate with team members.
posted on 16 Dec 2015
based on 6 interviews
2 Interview rounds
based on 153 reviews
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