Coditas Technologies Java Developer Interview Questions and Answers

3 coding question , leetcode easy medium and mcqs

Q1. Basic questions regarding Python e.g. magic functions, constructor in python, list, tuple
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Q2. Basic questions regarding FastAPI e.g. what is pydantic, ORM usage, BaseModel etc.
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Q3. Basic questions regarding SQL e.g. No-SQL vs SQL, Indexing,
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Logical thinking and quantitative

One Java and one SQL and one js question

Q1. What is collections
Ans. 
Collections are data structures that store and organize multiple elements in a single unit.
• Collections provide methods to add, remove, and manipulate elements.

• Examples of collections include arrays, lists, sets, and maps.

• Collections can be used to efficiently manage and access large amounts of data.
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Q2. What is constructor
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A constructor is a special method in a class that is automatically called when an object of that class is created.
• Constructors have the same name as the class they belong to

• They are used to initialize the object's state

• Constructors can have parameters to customize the initialization process
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Q3. What is data science
Ans. 
Data science is a field that uses scientific methods, algorithms, and systems to extract knowledge and insights from structured and unstructured data.
• Data science involves collecting, analyzing, and interpreting large amounts of data to make informed decisions.

• It combines statistics, machine learning, and domain knowledge to uncover patterns and trends in data.

• Data scientists use programming languages like Python and R...read more
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They asked react theoretical questions and one javascript coding round was there which was mandatory to clear the intervuew

Q1. Should possess knowledge on OS?
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Q2. Should be willing to work at night from office.
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Q1. What Os have you worked on?
Ans. 
I have worked on Windows, Linux, and macOS operating systems.
• Windows

• Linux

• macOS
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Q2. What are device drivers?
Ans. 
Device drivers are software programs that allow the operating system to communicate with hardware devices.
• Device drivers act as a translator between the hardware device and the operating system.

• They provide a standardized way for the operating system to interact with different hardware devices.

• Examples include drivers for printers, graphics cards, network adapters, and USB devices.
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Q1. What is Hoisting?
Ans. 
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.
• Variables and functions are hoisted to the top of their scope.

• Only declarations are hoisted, not initializations.

• Function declarations are hoisted before variable declarations.
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Q2. What is currying?
Ans. 
Currying is a technique in functional programming where a function with multiple arguments is transformed into a sequence of functions, each taking a single argument.
• Currying helps in creating reusable functions and improving code readability.

• It allows partial application of functions, where some arguments are fixed and others are left to be provided later.

• Example: const add = (a) => (b) => a + b; add(2)(3) will return
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Q1. C# basic questions and store procedure questions mostly
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Q2. Trigger ,join related questions
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Q1. AngularJS related questions
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Q1. Previous company discussion
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