Modi Infosol Interview Questions and Answers

Q1. What is polymorphism
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

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

• Examples include method overloading and method overriding in object-oriented programming.
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Q2. Find missing number from nth number array.
Ans. 
Find missing number from nth number array.
• Iterate through the array and calculate the sum of all numbers

• Calculate the sum of numbers from 1 to n using the formula n*(n+1)/2

• Subtract the sum of array from the sum of numbers from 1 to n to find the missing number
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Q3. Explain inheritance and it types
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Inheritance allows a class to reuse code from another class.

• Types of inheritance include single inheritance, where a class inherits from only one parent class, and multiple inheritance, where a class inherits from multiple parent classes.

• Example: Class B inherits from Class A, so Class B can access
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Q4. Find 2nd max elements from aaray
Ans. 
Find 2nd max element from array of strings
• Sort the array in descending order

• Skip the first element (max element)

• Return the second element
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Q1. Spark code optimization
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Q2. Data formats in big Data, why each format.
Ans. 
Different data formats in big data are used for various purposes like storage efficiency, data processing speed, and compatibility with different systems.
• JSON: Lightweight, human-readable, and widely supported for web applications.

• Parquet: Columnar storage format for efficient querying and processing of large datasets.

• Avro: Schema-based serialization format with support for complex data types.

• ORC: Optimized Row Columna...read more
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Q3. Leet code - Most freq elem in a list
Ans. 
Find the most frequent element in a list of strings.
• Iterate through the list and count the frequency of each element using a dictionary.

• Track the element with the highest frequency as you iterate.

• Return the element with the highest frequency.
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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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