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Codetentacles Technologies
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I was interviewed before Jan 2024.
Different types of blockchains include public, private, and consortium blockchains.
Public blockchains are open to anyone and allow for anonymous participation, examples include Bitcoin and Ethereum.
Private blockchains are restricted to a specific group or organization, providing more control over permissions and data access.
Consortium blockchains are semi-decentralized, where multiple organizations share the responsibi...
Different data types in blockchain development and their visibility
Primitive data types: int, float, bool, string (visible to all)
Structs: custom data structures (visible within the contract)
Arrays: collection of data (visible within the contract)
Mappings: key-value pairs (visible within the contract)
A proxy contract acts as an intermediary between a user and a target contract, allowing the user to interact with the target contract through the proxy.
Proxy contract holds the logic of the target contract and delegates calls to it.
Users interact with the proxy contract, which forwards the calls to the target contract.
Proxy contracts can be upgraded without affecting the user's interaction with the target contract.
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I applied via Walk-in and was interviewed before Dec 2020. There were 3 interview rounds.
I applied via Naukri.com and was interviewed in Aug 2020. There were 3 interview rounds.
I applied via Campus Placement and was interviewed before Feb 2020. There were 6 interview rounds.
I applied via Company Website and was interviewed before Feb 2020. There was 1 interview round.
I applied via Campus Placement and was interviewed in Oct 2020. There were 4 interview rounds.
Bubble sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order.
Start from the first element and compare it with the next element
If the next element is smaller, swap them
Repeat this process for all elements in the array
Continue this process until no more swaps are needed
A program to print all prime numbers
Take input from user for range of numbers
Loop through the range and check if each number is prime
Print the prime numbers
Hashmap is a data structure that stores key-value pairs and allows constant time access to values based on their keys.
Hashmap uses a hash function to map keys to indices in an array.
Collisions can occur when multiple keys map to the same index, which can be resolved using techniques like chaining or open addressing.
Examples of hashmap implementations include Java's HashMap class and Python's dict type.
Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.
Inheritance allows code reuse and promotes code organization.
The existing class is called the parent or superclass, and the new class is called the child or subclass.
The child class inherits all the properties and methods of the parent class and can also add new properties and methods.
For...
I applied via Walk-in and was interviewed in Mar 2021. There was 1 interview round.
I was interviewed in Mar 2021.
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