Pocket FM Software Developer Interview Questions and Answers

Coding test nodejs assignnment

Q1. Define your current project
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Q2. Coding problem on DP
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Q1. What are statics functions in OOPS
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Static functions in OOP are functions that belong to the class itself, rather than to instances of the class.
• Static functions can be called without creating an instance of the class.

• They are commonly used for utility functions that do not require access to instance-specific data.

• Static functions are declared using the 'static' keyword in many programming languages.

• Example: In Java, a static function in a class can be c...read more
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Q2. What is Polymorphism in OOPs
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Polymorphism in OOPs allows objects of different classes to be treated as objects of a common superclass.
• Polymorphism allows methods to be called on objects of different classes that all inherit from a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overriding in inheritance and method overloading within the same class.
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Q3. What is websockets and its alternative
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Websockets are a communication protocol that allows for full-duplex communication between a client and a server over a single, long-lived connection.
• Websockets provide real-time, bi-directional communication between a client and a server.

• They are commonly used in applications that require instant updates, such as chat applications, online gaming, and financial trading platforms.

• Websockets use a persistent connection, u...read more
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Q4. What is JWT and How it works
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JWT stands for JSON Web Token, a compact and self-contained way for securely transmitting information between parties as a JSON object.
• JWT is composed of three parts: header, payload, and signature.

• Header typically consists of the type of token and the hashing algorithm being used.

• Payload contains the claims, which are statements about an entity and additional data.

• Signature is created by encoding the header, payload, ...read more
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2 coding questions 1 easy ,1 hard , 20 MCQ question and 1 SQL question

Q1. Asked questions of coding round
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Q2. Questions about project ,jwt architecture,nextjs vs react
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Q1. 2 SQL query using group by
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SQL queries using GROUP BY aggregate data based on specified columns, allowing for summary statistics.
• GROUP BY is used to arrange identical data into groups.

• Example: SELECT department, COUNT(*) FROM employees GROUP BY department; - counts employees per department.

• You can use aggregate functions like SUM, AVG, MAX, MIN with GROUP BY.

• Example: SELECT department, AVG(salary) FROM employees GROUP BY department; - calculates...read more
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Q2. Question about projects and cs fundamentals
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Basic LIS problem. Coded using Java. Asked to improve it using collections.

Q1. Explain current project and what you have handled
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Q2. Longest substring problem
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