Align Technology NOC Engineer Interview Questions and Answers

Basic aptitude test with 10 questions of maths and 10 questions of English and 10 questions of reasoning.

Q1. Explain mvvm architecture
Ans. 
MVVM is an architectural pattern used in software development that separates the user interface from the business logic.
• Model represents the data and business logic

• View displays the data and interacts with the user

• ViewModel acts as a mediator between the Model and View, handling user input and updating the Model
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Q2. Discuss about design patterns
Ans. 
Design patterns are reusable solutions to common problems in software design.
• Design patterns help in creating flexible, maintainable, and scalable software.

• Examples of design patterns include Singleton, Factory, Observer, and Strategy.

• Design patterns are categorized into three groups: creational, structural, and behavioral patterns.
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Q1. Benefits of swift programming
Ans. 
Swift programming offers fast performance, safety, and interoperability with Objective-C.
• Fast performance due to being compiled language

• Safety features like optionals and type interference

• Interoperability with Objective-C for using existing code and libraries
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Q2. How to post data to server using url session
Ans. 
Use URLSession to post data to a server
• Create a URL request with the server URL

• Set the request method to POST

• Add the data to the request body using Data or JSONSerialization

• Create a URLSessionDataTask with the request and resume it
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Q1. Relayed to salary negociation
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Q1. What is Tuples? How do you convert a string to a tuple?
Ans. 
Tuples are immutable sequences of elements. A string can be converted to a tuple using the tuple() function.
• Tuples are similar to lists but are immutable

• Elements of a tuple are enclosed in parentheses ()

• A string can be converted to a tuple using the tuple() function

• Each character in the string becomes an element in the tuple
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Q2. What is Left Join? Show one Left join for 2 data frames on Python
Ans. 
Left join is a type of join operation in SQL that returns all the rows from the left table and matching rows from the right table.
• Left join is performed using the 'left join' keyword in SQL

• In Python, left join can be performed using the 'merge' function from the pandas library

• Syntax: pd.merge(left_dataframe, right_dataframe, how='left', on='key_column')

• Example: pd.merge(df1, df2, how='left', on='id')
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Q1. Lamda experience
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Q1. Explain abt yourself, current ctc, expected ctc
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Q1. Diamond problem, oops concept
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Small task in catia api

Q1. What is SIngularity in BIW
Ans. 
Singularity in BIW refers to a point where multiple body panels meet in a vehicle's body structure.
• Singularity is a critical point in BIW design where multiple panels converge.

• It is important to ensure proper fit and alignment at singularity points to maintain structural integrity.

• Examples of singularity points include door openings, roof joints, and hood connections.
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Q2. Time taken for Spot welding by robot
Ans. 
The time taken for spot welding by a robot depends on various factors such as material thickness, type of material, welding parameters, and robot speed.
• Time taken for spot welding can vary based on the material thickness. Thicker materials may require longer welding times.

• The type of material being welded can also impact the time taken. Different materials have different conductivity and heat transfer properties.

• Weldin...read more
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