iEnergizer NAP Engineer Interview Questions and Answers

Q1. Tell me about yourself?
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Q2. Introduction round about yourself
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Q3. About work experience in past company
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Q1. Dependency injections
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Q2. Solid principles,linq
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Easy coding questions

Q1. Hashmap question
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First time attend aptitude test .

Q1. Any computer engineering basic questions
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Q2. C,C++,java , python
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Q3. What is inheritance.how many times of inheritance.
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Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class.
• Inheritance allows for code reusability and promotes the concept of 'is-a' relationship.

• There are different types of inheritance such as single inheritance, multiple inheritance, multilevel inheritance, and hierarchical inheritance.

• Example: Class B inheriting from Class A - 'class B: public A {}'
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Q4. How many characters are used in C.
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C uses a set of 128 characters, including letters, digits, special characters, and control characters.
• C uses 26 letters (uppercase and lowercase), 10 digits (0-9), and various special characters like !, @, #, $, %, etc.

• C also includes control characters like newline, tab, carriage return, etc.

• The total number of characters used in C is 128.
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Q5. What is c. How many characters are used.
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C is a programming language known for its efficiency and flexibility. It uses 256 characters.
• C is a high-level programming language used for system programming, embedded systems, and applications.

• C uses 256 characters, including letters, digits, special characters, and whitespace.

• Examples of characters in C include 'a', '1', '+', and ' '.
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Q1. Ospf, bgp states
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Q2. How stp work in 3 switches
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STP (Spanning Tree Protocol) is used to prevent loops in a network by blocking redundant paths between switches.
• STP elects a root bridge to serve as the central point in the network

• Each switch determines the best path to the root bridge based on the lowest path cost

• Ports on switches are designated as root ports, designated ports, or blocking ports to create a loop-free topology
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Prepare well and all the best.

Q1. What is Oops concept
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Oops concept stands for Object-Oriented Programming concepts which include principles like inheritance, encapsulation, polymorphism, and abstraction.
• Oops concept is a programming paradigm that focuses on objects and classes.

• It includes principles like inheritance, where a class can inherit properties and behavior from another class.

• Encapsulation is another principle where data is wrapped within a class and can only be ...read more
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Q2. Features of java 8
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Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to pass functionality as an argument to a method.

• Functional interfaces have a single abstract method and can be used with lambda expressions.

• Streams provide a way to work with sequences of elements and perform operations like filter, map, and reduce.

• Default methods allow ...read more
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Q1. Questions regarding React.js, TypeScript, GraphQL pure component, hooks, useEffect vs useLayoutEffect, portals in react, how do you make API calls, What are ref in React, error handling in react how to ove...read more
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Q2. Small machine coding assignment to solve in online IDE fetch data from API & show the results also provide search input box at top where user can search items.
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Q1. How do you create GQL server, directive in GQL, Fragments in GQL how do you write unit tests for gql Queries/mutations (on the server side) TypeScript: Partial, Decorators, unions, Generics useCallback vs ...read more
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Answering questions related to creating GQL server, directives, fragments, unit tests, TypeScript features, and React.js functionalities.
• To create a GQL server, you can use tools like Apollo Server or Express with GraphQL middleware.

• Directives in GQL are used to modify the behavior of a field or fragment in a query. For example, @include and @skip are common directives.

• Fragments in GQL allow you to define reusable unit...read more
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Q2. React Router & Authentication using jwt
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React Router is used for client-side routing in React applications. JWT is used for authentication by generating tokens for secure communication.
• React Router is a library that allows for declarative routing in React applications

• Authentication using JWT involves generating a token on the server and sending it to the client for subsequent requests

• JWT tokens typically contain information about the user and are signed to e
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Q1. 2 people took the interview & it took 1 hour 15 mins 1. Array based question on sorting & merging 2. array based easy question 3. sorting related question (medium level)
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Q1. Ask technical questions only.
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Q2. Every time it is different
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Q1. Always ask different questions
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