Wyzmindz Solutions Software Developer Interview Questions and Answers

Q1. Difference between linked list and array list
Ans. 
Linked list is a data structure where elements are stored in nodes with pointers to the next node. Array list is a dynamic array that can grow or shrink in size.
• Linked list allows for efficient insertion and deletion of elements anywhere in the list.

• Array list provides fast access to elements using index, but slower insertion and deletion compared to linked list.

• Example: Linked list - 1 -> 2 -> 3 -> 4 -> 5, Array list
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Q2. Difference between @controller and @ Rest controller
Ans. 
The @Controller annotation is used for traditional MVC controllers, while @RestController is used for RESTful web services.
• The @Controller annotation is used to define a class as a Spring MVC controller, which can handle HTTP requests and return a view.

• The @RestController annotation is used to define a class as a controller for RESTful web services, which can handle HTTP requests and return data in JSON or XML format.

• T...read more
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Q1. SOLID principles
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Q2. Microservice Architecture and Kafka
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Got question related to logical reasoning

Q1. Struct vs enumerations
Ans. 
Structs are used to define a data structure with multiple fields, while enumerations are used to define a set of named constants.
• Structs are used to group related data together, while enumerations are used to define a set of named constants.

• Structs can have multiple fields of different data types, while enumerations can only have a fixed set of named values.

• Example: struct Person { string name; int age; } vs enum Days
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Q2. Paging in Operating systems
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Paging in operating systems is a memory management scheme that allows the operating system to use disk space as an extension of RAM.
• Paging divides physical memory into fixed-size blocks called pages.

• Virtual memory is divided into fixed-size blocks called frames.

• The operating system keeps track of which pages are in RAM and which are on disk using a page table.

• When a process needs a page that is not in RAM, a page fault...read more
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Easy to Medium difficulty with Aptitude Questions

Q1. Merge Sort was asked
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Q2. Merge sort in a linked list was asked as follow up
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Q1. Questions on DBMS and core Java were asked (Easy only)
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Q1. Basic HR questions were asked
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Logical thinking was important for preparation

Q1. About the field u chose provide with examples
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Q2. Explain about sql
Ans. 
SQL is a programming language used for managing and manipulating relational databases.
• SQL stands for Structured Query Language

• It is used to create, modify, and retrieve data from databases

• SQL is a declarative language, meaning you specify what you want to achieve rather than how to achieve it

• Common SQL commands include SELECT, INSERT, UPDATE, and DELETE

• SQL is used in various database management systems like MySQL, Orac
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Q1. The second round was also on techincal and the deep dicussion on field u chose
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Q1. Tell me about yourself
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Q2. Covered on all aspects and personality
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I was asked with writing the code and algorithms. Also lots of MySQL queries