Appperfect Corp Software Engineer Interview Questions and Answers

Q1. Concepts of OOPS, ANGULAR,SQL,.net
Add your answer

Q1. Oops,SQL, Angular,Trying to get what is my thought process behind problem,.net
Add your answer

Q1. Sql, Angular,Oops, Thought process for problems,.net
Add your answer

Q1. Basic Form Validation on React Js but on a platform which doesn't have syntax highlighting. Expected best coding standards to be followed.
Add your answer

Q1. React Js and JavaScript questions
Add your answer

Q1. Technical questions based on situations.
Add your answer

Q1. Explain fail fast and fail safe iterator in Java
Ans. 
Fail fast iterator throws ConcurrentModificationException if the collection is modified while iterating. Fail safe iterator does not throw exception but works on clone of collection.
• Fail fast iterator checks for modification during iteration and throws ConcurrentModificationException if found.

• Fail safe iterator works on clone of collection and does not throw exception if collection is modified.

• Example: ArrayList iterat...read more
Answered by AI
Add your answer

Q1. C# oops polymorphism extension methods
Ans. 
Polymorphism is a key feature of OOP in C#. Extension methods allow adding new functionality to existing types.
• Polymorphism allows objects of different classes to be treated as if they are of the same type.

• Extension methods are static methods that can be called as if they were instance methods of the extended type.

• Polymorphism and extension methods can be used together to add new behavior to existing types without modi
Answered by AI
Add your answer
Q2. Angular javascript vs typescript services components
Ans. 
Angular is a framework for building web applications using TypeScript, which is a superset of JavaScript.
• Angular provides a structure for building web applications using components, services, and modules.

• TypeScript is a statically typed language that provides better tooling and error checking than JavaScript.

• Services in Angular are used for sharing data and functionality across components.

• Components in Angular are the ...read more
Answered by AI
Add your answer

Q1. They are asking technical questions what is their in the resume
Add your answer

Q1. They will technical questions as per your resume what you mentioned
Add your answer

1-HR round, basic Aptitude questions

Q1. Interviewer was good, Tough basic java questions were asked, Problem : Count the frequency of Char in given string.
Add your answer
Q2. Inheritance in java
Ans. 
Inheritance in Java allows a class to inherit properties and behaviors from another class.
• Inheritance is achieved using the 'extends' keyword in Java.

• Subclasses can access the methods and fields of the superclass.

• Java does not support multiple inheritance, but a class can implement multiple interfaces.
Answered by AI
Add your answer
Q3. What is java platform independent
Ans. 
Java platform independence refers to the ability of Java code to run on any device or operating system without modification.
• Java code is compiled into bytecode, which can be executed on any device with a Java Virtual Machine (JVM)

• JVM acts as an abstraction layer between the Java code and the underlying hardware and operating system

• This allows Java programs to be written once and run anywhere, making them platform indep
Answered by AI
Add your answer
Q4. SQL query for second max salary
Ans. 
Use SQL query with subquery to find second highest salary
• Use subquery to find the max salary first

• Then use another subquery to find the max salary excluding the previously found max salary
Answered by AI
Add your answer
Q5. Access modifiers in depth
Ans. 
Access modifiers control the visibility and accessibility of classes, methods, and variables in object-oriented programming.
• Access modifiers include public, private, protected, and default (package-private)

• Public: accessible from any other class

• Private: only accessible within the same class

• Protected: accessible within the same package and subclasses

• Default: accessible within the same package
Answered by AI
Add your answer