Infosys Angular Interview Questions for 2 years

Shared question set for 2 years of experience. Topics and wording follow the supplied notes; these are questions, not official company guidance.

1. What is the difference between var, let, and const?
2. What is a closure, and what types of scope are there in JavaScript?
3. What is a callback function?
4. What is the difference between find and filter? How do you check whether a specific element is present in an array?
5. What is the difference between call, apply, and bind?
6. What are the ES6 features?
7. What is the difference between localStorage and sessionStorage?
8. What is the difference between null and undefined?
9. Using Date methods, extract the day, month, and year and create a formatted date string.
10. What is the time complexity of the Array filter and find methods?
11. Print the Fibonacci series.
12. Create an ecommerce product object containing a nested object and an array of objects.
13. What are components and modules?
14. What is data binding?
15. What is a directive? Can we create a custom structural directive like *ngIf?
16. What is a pipe, and which command creates a custom pipe?
17. What is the use of a service?
18. Why is routing an important building block in Angular?
19. How do you navigate with query parameters?
20. What is the difference between template-driven and reactive forms?
21. What are the different ways to create a reactive form?
22. How have you handled API errors in your project?
23. Create a reusable show-more/show-less component using @Input for the text and character limit. Then show the complete text as a tooltip using the title attribute with property binding.

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