Mobile OS Interview Questions
Questions Answers Views Company eMail

What’s the difference between an “app id” and a “bundle id” and what is each used for?

465

What is a category and when is it used?

490

What are “strong” and “weak” references? Why are they important and how can they be used to help control memory management and avoid memory leaks?

417

What are the limits of accessibility ?

458

Explain the characteristics of ios?

445

Explain place holder constraint

422

Explain differences between foundation and corefoundation

472

What is auto-layout?

510

What is the difference between let and var in swift?

472

What is the difference between atomic and non-atomic properties? Which is the default for synthesized properties? When would you use one over the other?

412

Explain the difference between copy and retain?

536

What is the difference between synchronous & asynchronous task ?

426

Why do you generally create a weak reference when using self in a block?

464

what’s accessibilityhint?

459

What is made up of nserror object?

450


Un-Answered Questions { Mobile OS }

Difference in classes and structures in swift?

461


what are functions different from methods?

465


What are application widgets in android?

533


What do adt stands for?

517


How to delete images in ios?

459






How do you pass the data to sub-activities android?

483


What is android 6 called?

517


Explain some common features of protocols & superclasses.

571


Why we use delegate in ios?

413


How was android os created?

430


What is an application resource file?

508


Why swift is safe?

451


How do I upgrade my os?

498


What is thread in ios swift?

415


What is a buildtype in gradle?

483