UBS ENO Interview Questions, Process, and Tips

Round duration - 60 minutes
Round difficulty - Easy

This was a technical round with questions on puzzle, programming and Java OOPS based.

Q1. 
Pattern Printing Task
You are tasked with printing a specific pattern based on the given number of rows, 'N'. For any input value of 'N', generate and print a pattern as described in the example.
Input:
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Ans. 
The task is to print a specific pattern based on the given number of rows, 'N'.
• Iterate through each row and print the numbers in the specified pattern

• Start with the first row, then move to the next row in a spiral pattern

• Ensure there is exactly one space between each value in a row
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Q2. What is an abstract class?
Ans. 
An abstract class is a class that cannot be instantiated and is used as a blueprint for other classes to inherit from.
• Cannot be instantiated directly

• May contain abstract methods that must be implemented by subclasses

• Can have both abstract and concrete methods

• Used to define common behavior for subclasses
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Q3. What is a final class in Java?
Ans. 
A final class in Java is a class that cannot be extended or subclassed.
• Final classes are marked with the 'final' keyword in Java.

• Final classes are often used for utility classes or classes that should not be modified or extended.

• Example: 'String' class in Java is a final class.
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Q4. What is the difference between static and non-static methods in Java?
Ans. 
Static methods belong to the class itself, while non-static methods belong to instances of the class.
• Static methods can be called without creating an instance of the class.

• Non-static methods can only be called on an instance of the class.

• Static methods cannot access non-static variables or methods directly.

• Non-static methods can access both static and non-static variables and methods.

• Example: Math.sqrt() is a static me...read more
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Round duration - 60 minutes
Round difficulty - Easy

This was the best round! The director took my interview. It eventually got converted into a technical round.

Q1. Write a program to connect to a backend or database (SQL Server) using C#.
Ans. 
Use C# to connect to a SQL Server backend or database.
• Use SqlConnection class to establish a connection to the SQL Server.

• Use SqlCommand class to execute SQL queries.

• Handle exceptions using try-catch blocks.

• Remember to close the connection after use.
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Q2. What are the advantages of using WCF (Windows Communication Foundation) services?
Ans. 
WCF services provide advantages such as interoperability, security, reliability, and flexibility.
• Interoperability: WCF allows communication between different platforms and technologies.

• Security: WCF supports various security mechanisms like message encryption and authentication.

• Reliability: WCF ensures reliable message delivery through features like reliable messaging.

• Flexibility: WCF supports multiple communication pr...read more
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Q3. What is an APK file?
Ans. 
An APK file is a package file format used for distributing and installing applications on Android devices.
• APK stands for Android Package Kit

• Contains all the necessary files for an Android app to be installed on a device

• Can be downloaded from app stores like Google Play or third-party websites
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Q4. What is API Level in Android?
Ans. 
API Level in Android is a unique integer value assigned to each version of the Android platform.
• API Level determines the Android framework API features available to an app.

• Developers specify the minimum API Level required for their app to run.

• Higher API Levels offer more features but may limit app compatibility with older devices.

• For example, Android 11 has API Level 30.
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Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.