NeoSOFT Interview Questions, Process, and Tips

Q1. What are the differences between an ArrayList and a LinkedList?
Ans. 
ArrayList is implemented as a resizable array, while LinkedList is implemented as a doubly linked list.
• ArrayList provides fast random access and slower insertion/deletion, while LinkedList provides fast insertion/deletion and slower random access.

• ArrayList uses less memory overhead compared to LinkedList.

• Example: ArrayList is more suitable for scenarios where frequent access and traversal of elements is required, while...read more
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Q1. == operation & .equals() method method overloading
Ans. 
The == operator is used to compare references in Java, while the .equals() method is used to compare values. Method overloading is when multiple methods have the same name but different parameters.
• Use == to compare references, use .equals() to compare values

• Method overloading allows multiple methods with the same name but different parameters

• Example: String str1 = new String("hello"); String str2 = new String("hello");...read more
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Q2. Linked list working with example
Ans. 
A linked list is a data structure where each element points to the next element in the list.
• Linked list is made up of nodes, each containing data and a reference to the next node.

• Insertion and deletion are efficient in linked lists compared to arrays.

• Example: Node 1 -> Node 2 -> Node 3 -> null
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Q1. Hashmap and Cocurrenthashmap difference
Ans. 
HashMap is not thread-safe, while ConcurrentHashMap is thread-safe.
• HashMap is not synchronized and not thread-safe, while ConcurrentHashMap is thread-safe.

• ConcurrentHashMap allows concurrent modifications without causing any ConcurrentModificationException.

• ConcurrentHashMap achieves thread-safety by dividing the map into segments, each with its own lock.
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Q1. What is event loop
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Asked me to build an entire application in 30 min when he himself joined the meeting 15 mins late

Q1. Oops concepts JavaScript related
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Q1. Project related technologies used
Ans. 
Used technologies include Java, Spring Boot, Angular, and MySQL.
• Java

• Spring Boot

• Angular

• MySQL
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Q1. OPPS Concept, C# String, Authentication, Authorization
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Q2. Explain Authentication and Authorization
Ans. 
Authentication verifies the identity of a user, while authorization determines what actions they can perform.
• Authentication is the process of verifying the identity of a user or system.

• It ensures that the user is who they claim to be.

• Common authentication methods include passwords, biometrics, and two-factor authentication.

• Authorization determines what actions a user or system is allowed to perform.

• It is based on the a...read more
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Q3. Explain Abstraction and Encapsulation
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Abstraction is the process of hiding unnecessary details, while encapsulation is the bundling of data and methods into a single unit.
• Abstraction focuses on the 'what' rather than the 'how'

• Abstraction allows us to create simplified models of complex systems

• Encapsulation ensures data and methods are kept together and hidden from external access

• Encapsulation provides data protection and code organization

• Example of abstrac...read more
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Q4. Explain difference between VeiwData and ViewBag
Ans. 
ViewData and ViewBag are both used to pass data from controller to view in ASP.NET MVC, but ViewData uses dictionary while ViewBag uses dynamic properties.
• ViewData is a dictionary object that stores data using key-value pairs.

• ViewBag is a dynamic property that allows you to store and retrieve data.

• ViewData requires typecasting while ViewBag does not.

• ViewData is a bit slower than ViewBag due to typecasting.

• Example: View
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Q5. Explain Design Pattern
Ans. 
Design patterns are reusable solutions to common problems in software design.
• Design patterns provide proven solutions to recurring design problems.

• They promote code reusability, maintainability, and scalability.

• Examples of design patterns include Singleton, Observer, and Factory.

• Design patterns can be categorized into three types: creational, structural, and behavioral.
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