Nexgile Technologies Junior Software Engineer Trainee Interview Questions and Answers

Quant, logical reasoning, mathematics

Q1. Access modifiers
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Q2. Diff between abstract class and interface Difference between array and array list Difference between method overloading and overriding Pillars of oops Deadlock Normalisation
Ans. 
Abstract class is a class with abstract methods, interface is a contract with only abstract methods. Array is fixed size, ArrayList is dynamic. Method overloading is same method with different parameters, overriding is redefining a method. OOP pillars are inheritance, encapsulation, polymorphism, abstraction. Deadlock is a situation where two or more processes are unable to proceed because each is waiting for the other...read more
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Easy applitute question with 1 coding question at the end

Q1. String builder vs string buffer
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String builder is faster but not thread-safe, while string buffer is slower but thread-safe.
• String builder is recommended for single-threaded applications for better performance.

• String buffer is recommended for multi-threaded applications to ensure thread safety.

• Example: StringBuilder sb = new StringBuilder(); StringBuffer sbf = new StringBuffer();
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Q2. Final keyword in oops
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The final keyword in OOP is used to restrict the user from changing the value of a variable, overriding a method, or inheriting from a class.
• Final variable: value cannot be changed once assigned

• Final method: cannot be overridden in child classes

• Final class: cannot be inherited by other classes
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Q3. Bsf graph explanation
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BSF graph explanation
• BFS (Breadth-First Search) is a graph traversal algorithm that explores all the neighbor nodes at the present depth before moving on to the nodes at the next depth.

• It uses a queue data structure to keep track of the nodes to visit next.

• BFS is often used to find the shortest path in an unweighted graph.

• Example: BFS can be used to find the shortest path in a maze from the starting point to the exit.
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It contains 60 questions solve in 60 minutes and 1 coding questions simply debug extra 15 minutes are given

Q1. 7 to 8 minut google meet technical interview about your project, sql and basics of your main language
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Q1. It just normal interview
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There was an OA which comprised of Aptitude questions, as well as Technical questions. And, there was a single coding question(Basic level)

Q1. This round was with the CTO of the company and manager, and CHRO of the company. Questions related to project were asked.
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Q2. Tell me something that is not there in your resume. Describe any one of your project in detail What is S3 architecture? Difference between GET and POST Describe HTTP Response
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Easy level questions

Q1. Difference between object and constructor?
Ans. 
Object is an instance of a class with its own state and behavior, while constructor is a special method used to initialize objects.
• Object is created from a class using the 'new' keyword.

• Constructor is a special method with the same name as the class.

• Object has its own state (attributes) and behavior (methods).

• Constructor is used to initialize the state of an object when it is created.

• Example: Class Car { constructor(ma...read more
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Q2. Difference between abstraction and encapsulation?
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Abstraction focuses on hiding the implementation details while encapsulation focuses on bundling the data and methods that operate on the data into a single unit.
• Abstraction is the concept of hiding the complex implementation details and showing only the necessary features of an object.

• Encapsulation is the bundling of data and methods that operate on the data into a single unit.

• Abstraction allows for creating simple in...read more
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Q1. Questions based on Objects and Classes Basic Questions related to DSA Projects discussions- Your Roles and Tasks Scenario based Questions Few Reasoning Questions
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Q1. Questions related to Trees and Graphs nested SQL Queries Scenario Based Questions Projects Logics for the coding given
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Q1. Just basic HR Questions Reallocation
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This one is a combination of aptitude and coding test where medium questions abt c,cpp are asked
Do few aptitude test and some level of coding and ull be able to clear the test quite easily

Q1. What is inheritance in cpp Basic oops concept question Basic dbms related question
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Q1. For me they just asked me about my project and i was good to go
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Question were based on coding 1 with linked list 1 with string and 1 sql one

Q1. Questions were based on oops, dsa, dbms, and more technical concepts from operating systems
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