GEP Worldwide Interview Questions and Answers

Q1. Differences between promises and observables
Ans. 
Promises are used for a single async operation while observables handle multiple async operations and can be cancelled.
• Promises are eager, meaning they start immediately upon creation.

• Observables are lazy, meaning they only start when subscribed to.

• Promises can only handle a single value or error, while observables can handle multiple values over time.

• Observables can be cancelled, while promises cannot be cancelled.

• Pro...read more
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Q2. Angular vs react differences
Ans. 
Angular and React are both popular front-end frameworks, but they have some key differences in terms of architecture, syntax, and ecosystem.
• Angular is a full-fledged framework with a steep learning curve, while React is a library that is more flexible and easier to learn.

• Angular uses two-way data binding, while React uses one-way data flow.

• Angular has a more opinionated architecture and provides more out-of-the-box fea...read more
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Q1. Explain exceptional handling
Ans. 
Exception handling is a mechanism to handle runtime errors in a program.
• Exception handling helps in gracefully handling unexpected errors in a program.

• It prevents the program from crashing and allows for proper error logging and recovery.

• Commonly used keywords in exception handling are try, catch, finally, and throw.

• Example: try { // code that may throw an exception } catch(Exception ex) { // handle the exception }
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Q2. Explain difference between abstract and interfaces
Ans. 
Abstract classes can have implementation details while interfaces cannot.
• Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

• A class can only inherit from one abstract class, but can implement multiple interfaces.

• Abstract classes can have constructors, fields, and properties, while interfaces cannot.

• Abstract classes are used when some common functionality ne...read more
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Q3. One coding question on arrays
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We had many aptitude, logical questions and essay writing and email writing in the first round

Q1. They asked me about the company, the role, situational questions etc
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Q1. Here also they asked almost the same patter of questions but more time was taken
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It was in genral apptitude round

Q1. OOPS Related question s, multithreading
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Q2. Explain about your project
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Q1. Question related to angular
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Q2. SQL questions like joins, DDL, DML commands
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