Comcast India Engineering Center Software Development Engineer 1 Interview Questions and Answers

The first round was a group discussion about online shopping.

Q1. What questions did the interviewer ask is related to the Java programming language
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Q1. Discussed about General questions related to Company and personal details
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Q1. Java springboot basic to intermediate question
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Q2. Java stream questions
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Q1. Easy level DSA questions
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Q2. Project based questions
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Q1. String based questions in java
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Q2. What are the fundamental concepts of Java?
Ans. 
Fundamental concepts of Java include OOP, platform independence, memory management, and exception handling.
• Object-oriented programming (OOP) - Java is based on classes and objects, allowing for encapsulation, inheritance, and polymorphism.

• Platform independence - Java code can run on any platform with the help of JVM (Java Virtual Machine).

• Memory management - Java has automatic garbage collection to manage memory effici...read more
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Java based questions and few DSA questions

1) Finding and removing loop in linked list. 2)find pair of given sum in binary tree

Q1. Print bottom view of binary tree
Ans. 
Print the bottom view of a binary tree
• Use a map to store the horizontal distance and node value at each level

• Perform a level order traversal of the binary tree

• Update the map with the node value at each horizontal distance

• Print the node values in the map for the bottom view
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Q2. Oops related output based questions
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In first round 4 coding question like 1 dsa 2 database and one is api and question is very simple . coding round was conducted in hackerrank

Q1. DSA QUESTION LIKE TREE AND GRAPH
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Q2. DP AND SORTING APPROACH
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Again same but dsa question and oops concept in deep level

Q1. Basic java fundamentals
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Q2. Spring boot,sql
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Q1. Some technical questions from manager
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Q2. Some challenges or scenario based questions
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Q1. Salary discussion mostly
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Q2. Benifts that they offer with TR
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Q1. What is the inheritance?
Ans. 
Inheritance is a mechanism in object-oriented programming where a class inherits properties and behaviors from another class.
• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can override or extend the functionality of the base class
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Q2. What are the types of joins in mysql
Ans. 
Types of joins in MySQL include inner join, left join, right join, and full join.
• Inner join: Returns rows when there is a match in both tables.

• Left join: Returns all rows from the left table and the matched rows from the right table.

• Right join: Returns all rows from the right table and the matched rows from the left table.

• Full join: Returns rows when there is a match in one of the tables.
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Q1. How to handle multiple api's
Ans. 
Use a centralized API gateway to manage and route requests to multiple APIs efficiently.
• Implement a centralized API gateway to handle incoming requests and route them to the appropriate API based on the endpoint.

• Utilize API management tools like Apigee, Kong, or AWS API Gateway to manage and monitor multiple APIs.

• Consider implementing a caching layer to improve performance and reduce the number of requests to external
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Q2. What does strstr function do?
Ans. 
strstr function searches for a substring within a string and returns a pointer to the first occurrence of the substring.
• Used in C programming language

• Syntax: char *strstr(const char *haystack, const char *needle)

• Example: char *str = strstr("hello world", "world")
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