Operating System (OS)
The higher versions of the operating systems are so written that programs designed for earlier versions can still be run. What is it called?

Upgradability
None of these
Upward compatibility
Universality
Upward mobility

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Operating System (OS)
File record length

None of these
should be chosen to match the data characteristics
depends upon the size of the file
should always be fixed
Should always be variable

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Operating System (OS)
Which, of the following, is true for testing and debugging?

None of these
All of these
Testing detects the syntax errors in the program while debugging corrects those errors in the program
Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program
Testing and debugging indicate the same thing

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