IBM Application Developer Interview Questions, Process, and Tips

Was asked about Polymorphism concept and vtable and vptr.
Overloading of new operator.
Questions on List and vector

Q1. Current project knowledge and challenges faced.
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Q2. Knowledge of different tools
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Q1. Why swift is called POPS?
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Q2. What is optional chaining, optional binding ?
Ans. 
Optional chaining and optional binding are techniques used in Swift programming language to safely unwrap optional values.
• Optional chaining allows you to access properties, methods, and subscripts of an optional that might currently be nil.

• Optional binding is a way to find out if an optional contains a value, and if so, to make that value available as a temporary constant or variable.

• Optional chaining uses '?' while op
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Q3. What is difference between MVC, MVVM and VIPER?
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MVC, MVVM, and VIPER are design patterns used in software development to separate concerns and improve code maintainability.
• MVC stands for Model-View-Controller and separates an application into three components: Model (data), View (UI), and Controller (logic).

• MVVM stands for Model-View-ViewModel and adds a ViewModel layer between the View and Model to handle user interactions and update the UI.

• VIPER is an application ...read more
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Q4. What is protocols ? what's difference between protocol & closure ?
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Protocols are a set of rules or guidelines for communication between different objects. Closures are blocks of code that can be passed around and executed later.
• Protocols define a blueprint of methods, properties, and other requirements that a class or structure must implement.

• Closures capture and store references to any constants and variables from the context in which they are defined.

• Protocols are used to define a s...read more
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Q5. Ways of data passing from one view controller to another view controller?
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Data passing between view controllers can be done using properties, delegates, notifications, segues, or user defaults.
• Use properties to directly pass data between view controllers

• Implement delegates to establish communication between view controllers

• Post notifications to broadcast data to multiple view controllers

• Pass data through segues when transitioning between view controllers

• Store data in user defaults for persis
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Q1. Why do you want to join IBM. ?
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Q2. What is main key strength that add values ?
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The main key strength that adds value is problem-solving skills.
• Ability to analyze complex problems and come up with effective solutions

• Critical thinking and logical reasoning skills

• Creativity in finding innovative solutions

• Adaptability to new technologies and frameworks

• Strong communication skills to collaborate with team members and stakeholders
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Q3. Salary discussion & prefer location
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Most questions on Logical reasoning and Basics of Programming

Q1. Tell me about yourself
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Q2. Tell me about your final year project
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Logical reasoning based games

The test was done on Hackerrank platform. the time was around 45 minutes.

Q1. Question about the final year project and personal projects done.
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It was physical interview. Attended an off campus drive where first round was of coding taken through Hackerearth platform. Not so much difficult, there were total seven test cases and 3 or 4 should be successful.

Q1. This was only interview including Technical as well as HR. Where I was asked about my introduction, final year project, asked to write any code of my choice and explain, joins and why IBM.
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Q1. Reverse the string (code in java )
Ans. 
Reverse a string in Java using StringBuilder or character array.
• Use StringBuilder's reverse() method to reverse the string.

• Alternatively, convert the string to a character array, swap characters from start and end, then convert back to string.
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Q2. SQL query to find max salary in different areas of employee
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Use SQL query to find max salary in different areas of employee
• Use GROUP BY clause to group employees by area

• Use MAX() function to find the maximum salary in each group

• Combine GROUP BY and MAX() to get the desired result
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