Sod Technologies Associate Software Engineer Interview Questions and Answers

Q1. Tell me about yourself.
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Q1. Bubble sort code
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Q2. 2nd max salary sql query
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Q3. Linked list implementation
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Linked list is a data structure where each element points to the next element in the sequence.
• Nodes contain data and a reference to the next node

• Operations include insertion, deletion, and traversal

• Example: Singly linked list: 1 -> 2 -> 3 -> null
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Corona Pandemic, digitalization

Qualitative and quantitative questions + gmat

Q1. Dbms, os, programming
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Q1. Java , collection , spring boot
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Q2. What is internal working of hashmap
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HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.
• 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.

• To retrieve a value, the key is hashed again to fi...read more
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Q1. Spring security, oops , hibernate
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Q1. 1. Difference between abstract class and interface. 2. Internal Working of HashMap 3. Difference Between ArrayList vs Linked List. 4. WAP to reverse a String 5. dependency Injections 6. IOC Container 7. S...read more
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This interview question covers various topics including abstract class, interface, HashMap, ArrayList, Linked List, String reversal, dependency injection, IOC container, and singleton class.
• Abstract class is a class that cannot be instantiated and can have both abstract and non-abstract methods.

• Interface is a blueprint of a class that can only have abstract methods and cannot be instantiated.

• HashMap is a data structure...read more
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Q2. Difference Between controller and Rest Controller
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Controller is a general term for handling requests, while Rest Controller is specifically for RESTful web services.
• Controller is responsible for handling incoming requests and returning responses.

• Rest Controller is a specialized type of controller that is used for building RESTful web services.

• Rest Controller uses HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations on resources.

• Rest Controller returns d...read more
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Q3. What is Stream API in java 8
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Stream API is a new feature in Java 8 that allows processing of collections in a functional way.
• Stream API provides a set of functional interfaces and methods to perform operations on collections.

• It supports parallel processing of collections, making it faster for large datasets.

• Examples of operations include filtering, mapping, sorting, and reducing.

• Stream API can be used with both primitive and object types.

• It promot...read more
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Q1. Mostly from the project that i have worked on.
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Q2. Optional Class in java

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Optional class in Java is used to represent a value that may or may not be present.

• Optional class was introduced in Java 8.

• It is used to avoid null pointer exceptions.

• It can be used with streams to filter out null values.

• Example: Optional name = Optional.ofNullable(null);

• Example: Optional name = Optional.of("John");

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