Paytail Softwaretest Engineer Interview Questions and Answers for Experienced

Q1. Give a brief Introduction
Add your answer

Q1. Does Java support pass by reference?
Ans. 
Yes
• Java uses pass by value for all variables, including object references.

• When an object reference is passed as an argument, a copy of the reference is passed, not the actual object.

• Modifying the reference inside the method will not affect the original reference outside the method.

• However, modifications to the object's state inside the method will be visible outside the method.
Answered by AI
Add your answer
Q2. Explain Singleton Pattern
Ans. 
Singleton pattern restricts the instantiation of a class to a single object.
• Singleton pattern ensures that only one instance of a class exists throughout the application.

• It provides a global point of access to the instance.

• Commonly used in scenarios where a single instance needs to coordinate actions across the system.

• Example: Database connection manager, logger, configuration manager.
Answered by AI
Add your answer

Q1. Internal Implementation of HashMap
Ans. 
HashMap is implemented using an array of linked lists to handle collisions.
• HashMap stores key-value pairs in an array of linked lists

• Hash function is used to determine the index of the array where the key-value pair will be stored

• Collision handling is done by chaining, where multiple key-value pairs with the same hash value are stored in the same linked list

• HashMap allows null keys and values

• HashMap is not synchronized...read more
Answered by AI
Add your answer

Q1. Tell me something about your self
Add your answer
Q2. Why should i hire u
Add your answer

Q1. Minimum 30 word per min typing speed with 95+ accuracy
Add your answer
Q2. How did i spent your yesterday
Add your answer

Q1. Normal questions by operation manager
Add your answer

There was an online aptitude test duration of 30 mins and topics covered (maths,stats,tech)

Hacathon test with java and python

Q1. Discussion about projects
Add your answer
Q2. Discussion about code skills
Add your answer

Q1. What is your job role
Ans. 
I am responsible for assisting in various tasks and projects within the company.
• Supporting team members in daily operations

• Completing assigned tasks in a timely manner

• Assisting in research and analysis

• Participating in meetings and discussions
Answered by AI
Add your answer
Q2. What is the ctc
Ans. 
CTC stands for Cost to Company, which includes all expenses related to an employee's compensation.
• CTC includes salary, bonuses, benefits, and any other perks provided by the company

• It is the total amount of money a company spends on an employee in a year

• CTC is often used to negotiate job offers and understand the full value of a compensation package
Answered by AI
Add your answer

Basic python, sql and pandas questions

Q1. Case study (Probability questions)
Add your answer
Q2. Resume projects
Add your answer

DS, Algo, DP, Greedy, Stack, Heap

Q1. System Design a DropBox
Ans. 
Design a scalable cloud storage system similar to DropBox.
• Use distributed file system for storing files across multiple servers.

• Implement data deduplication to save storage space.

• Use client-side encryption for security.

• Implement file synchronization across devices.

• Utilize load balancing to distribute user requests.

• Implement version control for files.

• Use metadata for efficient file organization.
Answered by AI
Add your answer
Q2. Design a Linked List
Ans. 
A linked list is a linear data structure where each element is a separate object with a reference to the next element.
• Start with a Node class that has data and a reference to the next node

• Create a LinkedList class that manages the nodes and provides methods like insert, delete, and search

• Example: Node class - data, next; LinkedList class - head, insert(data), delete(data), search(data)
Answered by AI
Add your answer

Q1. About yourself. Projects worked upon
Add your answer
Q2. Why want to join Ocrolus?
Add your answer