Black Box Corporation AV Engineer Interview Questions and Answers

It was simple basic level questions

Q1. Asked basic codes
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Q1. Normal basic hr type questions
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Q1. Write a program Binary Search?
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Binary search is a divide and conquer algorithm that efficiently finds the target value within a sorted array.
• Start by defining the low and high indices of the array.

• Calculate the middle index and compare the target value with the middle element.

• If the target value is less than the middle element, search the left subarray. If greater, search the right subarray.

• Repeat the process until the target value is found or the s
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Q2. What isCICD flow?
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CI/CD flow stands for Continuous Integration/Continuous Deployment flow, which is a software development practice where code changes are automatically built, tested, and deployed.
• CI/CD flow involves automating the process of integrating code changes into a shared repository, running automated tests, and deploying the changes to production.

• Continuous Integration (CI) focuses on automating the build and testing of code c...read more
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Q3. How to handle Enum feature?
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Enums are a feature in programming languages that allow you to define a set of named constants.
• Enums can be used to improve code readability by giving meaningful names to values

• Enums can be used in switch statements to handle different cases

• Enums can have associated values or raw values for more flexibility
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Q4. Singleton handles the Syncronized ?
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Yes, Singleton handles synchronization by ensuring only one instance of a class is created and providing global access to that instance.
• Singleton pattern restricts the instantiation of a class to one object.

• It provides a global point of access to the instance.

• Synchronization can be implemented in the Singleton pattern to ensure thread safety.

• Example: Singleton pattern is commonly used in database connections to ensure
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Q5. What are external Libraries are used in project?
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External libraries are pre-written code that can be imported and used in a project to provide additional functionality.
• External libraries help in reducing development time by providing ready-made solutions for common tasks.

• Examples include React for front-end development, NumPy for scientific computing in Python, and Retrofit for making network calls in Android apps.
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Q1. Oops concept, solid principles
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Q1. Angular. oops, c#
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Q1. Programs, oops, azure
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Q1. About company, Package negotiation, notice period
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Q1. .Net Core 7 & MVC
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Q1. Spark architecture pyspark coding sql coding
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Q1. Spark architecture sql window functions,aggreate functions pyspark data frame coding
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Q1. Programming Java dot net scenario questions
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Q1. General questions like scenario and reason for leaving
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Q1. What do you do for performance improvement while using ajax ?
Ans. 
Use caching, minimize data transfer, optimize server-side code.
• Implement caching to reduce server requests

• Minimize data transfer by sending only necessary data

• Optimize server-side code for faster response time
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Q2. What is transaction in database ?
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A transaction in a database is a sequence of operations that are treated as a single unit of work.
• Transactions ensure data consistency and integrity.

• They allow multiple operations to be grouped together and either all succeed or all fail.

• ACID properties (Atomicity, Consistency, Isolation, Durability) are maintained in transactions.

• Examples of transactions include transferring money between bank accounts or updating inv
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Q1. What activities do you perform for any new project?
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Q2. Can you connect directly to db using jscript ?
Ans. 
Yes, it is possible to connect to a database using JavaScript.
• JavaScript can connect to databases using APIs such as Web SQL, IndexedDB, and MongoDB.

• It is also possible to use Node.js to connect to databases using JavaScript.

• However, it is not recommended to connect to a database directly from client-side JavaScript due to security concerns.
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