ExcelaCom Technologies Software Engineer Interview Questions and Answers

50 Questions in 1 hour

Pattern and basic programming questions

Q1. Basic Java, SQL, and project-related questions
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Simple String or list releted questions for Arranging a string some conditions wise

Q1. Count number after decimal value What is decorator What is abstraction in python
Ans. 
To count number after decimal value in Python, use string manipulation or math module.
• Use string manipulation to count number of digits after decimal point

• Use math module to round off the number and then subtract the original number to get the digits after decimal point

• Example: num = 3.14159, str_num = str(num), decimal_index = str_num.index('.') + 1, digits_after_decimal = len(str_num) - decimal_index
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Ten reasoning questions, ten quantitative questions, and fifteen technical questions involving pseudo code, for a total of thirty-five questions to be completed in thirty minutes.

Three questions to solve test cases from LeetCode and similar platforms: one from arrays, one from strings, and one from stacks.

Q1. Many questions related to development , some reasoning questions, simple programs and most form resume
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Q1. To write a program for some sorting tech etc.. basic DSA
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Q1. About personality development and Resume
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Coding test are just basic Array and linkedList question

Q1. Explain 4 pillar of oops
Ans. 
The 4 pillars of OOP are Inheritance, Encapsulation, Abstraction, and Polymorphism.
• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation restricts access to certain components of an object, protecting its integrity.

• Abstraction hides complex implementation details and only shows the necessary features.

• Polymorphism allows objects of different classes to be treated as objects of a
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Q2. 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.

• Retrieving a value involves hashing the ...read more
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Q3. Crud operation implementation
Ans. 
Implementation of Create, Read, Update, and Delete operations in a software system.
• Use SQL queries for database operations

• Create separate functions for each operation

• Handle errors and exceptions properly

• Test thoroughly to ensure functionality

• Consider security measures to prevent unauthorized access
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Q1. Why are you chaning the organisation?
Ans. 
Seeking new challenges and opportunities for growth.
• Looking for a new environment to learn and develop new skills

• Interested in working on different projects and technologies

• Seeking better career advancement opportunities

• Wanting to work in a more collaborative team environment
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30 mins Aptitude Question

30 mins - 3 Coding Question

Q1. Describe Rest API
Ans. 
Rest API is a set of rules and conventions for building and interacting with web services using HTTP methods.
• Rest API stands for Representational State Transfer Application Programming Interface.

• It uses standard HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations.

• RESTful APIs use URLs to access resources, and return data in JSON or XML format.

• Stateless communication allows for scalability and flexibilit...read more
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Q2. What is various Response code. Diffenrence b/w 200 & 201, 400 & 403
Ans. 
Response codes indicate the status of a HTTP request. 200 & 201 are success codes, while 400 & 403 are client error codes.
• 200 - OK: Request was successful

• 201 - Created: Request was successful and a new resource was created

• 400 - Bad Request: The server cannot process the request due to a client error

• 403 - Forbidden: The server understood the request, but refuses to authorize it
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Q1. Questions related to Java, Spring, Rest API
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Q1. Basic java collection questions
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Q1. Spring boot basic questions
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Q1. Why should we hire you
Ans. 
I have a strong technical background, proven track record of delivering high-quality software, and a passion for continuous learning and improvement.
• I have a Bachelor's degree in Computer Science and X years of experience in software development.

• I have successfully led multiple projects from conception to completion, delivering high-quality software on time and within budget.

• I am proficient in a variety of programming ...read more
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Q1. Operate or control a particualar typing of data device that is attached to a computer
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Q2. Operate or contriol
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Q3. In computing a device driver is a computer program that operates or controls a particular type of device that is attached to a computer or automaton
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Q4. To perform some manual act upon a human body in a methodical manner, and usually with instruments, with a view to restore soundness or health, as in amputation, lithotomy, etc.
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