Psiog Digital Interview Questions and Answers

They conduct the exam about a 60 minutes and also extended it for extra 20 minutes they give 5 questions on computer networks and the remaining questions all about the logical reasoning and quantative aptitude. That is all about my first round aptitude test.

Q1. They ask about the network layers and also port numbers for the some networks.
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Q2. What are the network models we have in computer networks ? what are the port numbers of networks ? types of topologies ? explain some of topologies which are present in the computer networks..?
Ans. 
Network models include OSI and TCP/IP. Common port numbers include 80 for HTTP and 443 for HTTPS. Topologies include star, bus, ring, and mesh.
• Network models: OSI, TCP/IP

• Common port numbers: 80 (HTTP), 443 (HTTPS)

• Types of topologies: star, bus, ring, mesh

• Examples of topologies: star - all devices connected to a central hub, ring - each device connected to two others in a circular fashion
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Q3. And also they ask my self..
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Q1. Tell me about your self... why we hire you..? what place you think after 5 years work in this company..? how you can encograge your team mates when they feel low while doing a real time project..?
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Q1. Inheritance, Contructord, Polymorphism etc
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Q1. Exception Handing, Datatypes, Unix, Sql
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Q1. Given two codes to identify there output, the code includes the concept of 'this' keyword and its behavior with arrow functions and normal functions.
Ans. 
The code demonstrates the behavior of 'this' keyword with arrow functions and normal functions.
• Arrow functions do not bind their own 'this' value, it inherits 'this' from the surrounding scope.

• Normal functions have their own 'this' value, which is determined by how the function is called.

• Arrow functions are useful when you want to preserve the value of 'this' from the surrounding context.
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Q2. Given a coding question to get even numbers in a different array from the original array of numbers.
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Q3. Given SQL database structure and questions to which was asked to form SQL queries, it includes knowledge of 'joins' and use of subquery.
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Q4. Given a question to take the input from a user and print the sum of those input and return the output (javascript).
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Q5. What are streams and its type, write a code using the any of the stream.
Ans. 
Streams are objects that allow reading or writing data continuously. There are four types of streams: Readable, Writable, Duplex, and Transform.
• Streams are used to handle large amounts of data efficiently.

• They can be used for reading data from a source or writing data to a destination.

• Streams can be piped together to create a data flow.

• Example: Reading a file using a Readable stream and writing it to another file using
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This was a Machine Coding round, i was asked to come to office for this round. I was given to make a nodejs project from scratch using , any framework of my choice (expressjs, nestjs,etc), using sql database (any ORM of your choice).

Entities - User, Task

User -
1. user should have an email , first name, last name and password
2. user can login using email and password

Task -
1. CRUD for the task
2. Each task should be associated with a user

Extra (if time)-
1. User can assign task to different user

Note :- Time given was 2 Hours, i could not do the extras , but i was asked the question regarding my thought process on how will i approach the extras, because extras required a change in the already made entity models as well as in relations between them if any.

Q1. Java basic knowledge and deep knowledge
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Q2. Java, theory, oops, dbms
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