BANK SBI CBO Mock Test Series 2025 Computer Awareness Introduction to Computers

Which of the following are mobile operating systems?

1. Android

2. iOS

3. Windows Phone OS

4. Symbian

Select the correct answer using the codes given below.

1

All of the above

2

1 and 2

3

2 and 3

4

1, 2 and 3

5

None of the above

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