XL Dynamics Software Developer Interview Questions and Answers

Q1. What is refelection
Ans. 
Reflection is the ability of a program to examine and modify its own structure and behavior at runtime.
• Allows a program to inspect and modify its own classes, methods, and fields

• Commonly used in frameworks like Spring and Hibernate for configuration and dependency injection

• Can be used to access private fields or methods using Java reflection API
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Q1. Difference between Procedure, Packages and functions.
Ans. 
Procedures, Packages and Functions are all subprograms in PL/SQL with different characteristics.
• Procedures are subprograms that perform a specific task and may or may not return a value.

• Functions are subprograms that always return a value and can be used in SQL statements.

• Packages are a collection of related procedures, functions, variables, and other program constructs that can be used as a single unit.

• Packages provid...read more
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Q2. If table or view does not exist what does it mean
Ans. 
It means that the table or view does not exist in the database.
• The query will fail and return an error message.

• The application may crash or behave unexpectedly.

• The table or view may have been deleted or renamed.

• Check the spelling and syntax of the query.

• Make sure the database connection is established and valid.
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Q3. Difference Between Views and Materialized Views
Ans. 
Views are virtual tables while Materialized Views are physical tables.
• Views are created using SELECT statement while Materialized Views are created using CREATE MATERIALIZED VIEW statement.

• Views do not store data while Materialized Views store data.

• Views are updated dynamically while Materialized Views are updated manually or automatically based on refresh settings.

• Materialized Views are faster for read-heavy workloads...read more
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Q1. Details explanation about the projects and the concepts what we used.
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Q1. Polymorphism ..Pure virtual function ..oops concept ..Design pattern ..Smart printer STL
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Q1. Promise and async await difference
Ans. 
Promises are objects representing the eventual completion or failure of an asynchronous operation, while async/await is a syntactic sugar for working with promises.
• Promises are used for handling asynchronous operations and provide a way to chain multiple asynchronous operations together.

• Async/await is a newer syntax that makes working with promises easier by allowing you to write asynchronous code that looks synchronou...read more
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Q2. Array questions
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String manipulation question asked

Q1. Middleware and custom middleware
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Q2. Lifecycle of angular
Ans. 
Angular follows a lifecycle that includes initialization, change detection, and destruction phases.
• Angular components go through several lifecycle hooks such as ngOnInit, ngOnChanges, and ngOnDestroy.

• During initialization, ngOnInit hook is called after the component has been initialized.

• Change detection phase is triggered when Angular detects changes in the component's input properties or events.

• Destruction phase occur...read more
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Basic aptitude reasoning

Core js angular react

Q1. Expectations regarding the job and salary
Ans. 
I expect challenging projects, opportunities for growth, competitive salary based on experience and skills.
• Expect to work on challenging projects that will help me grow as a developer

• Opportunities for career advancement and skill development

• Expect a competitive salary based on my experience and skills

• Looking for a supportive work environment with opportunities for collaboration and learning
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Q2. Performance and location based questioning
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Q1. Basic core Java question.
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