Can a single core CPU execute 2 tasks at a time?

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I have read much, but opinions are different.
I wanna know:

1. A single core CPU executes 2 tasks at a time:
time1 = task1 + task2

2. A single core CPU executes 2 tasks by queue using context switching:
time1 = task1
time2 = task2

What is right?

Posted 14-Feb-15 4:10am

Ziya1995

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2 solutions

Solution 2

It can do one task while making you wait for another.

Posted 14-Feb-15 4:47am

PIEBALDconsult

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OriginalGriff · Accepted Answer · 2015-02-14T04:17:00

Solution 1

A single core can execute one task at a time: but it can switch tasks to appear to be executing many tasks simultaneously.

Posted 14-Feb-15 4:17am

OriginalGriff