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Q. How to Change Default Drive in dos?
To modify a default drive type the new drive letter followed by colon (:) and then press Enter. For example, if the default drive is A and you type C: and press Enter, DOS selects drive C: as the default drive. DOS verify this by changing the prompt to C:\> or a similar message. If you enter a drive letter that does not exists in your PC, DOS displays a message "Invalid Drive Specification".
When you choose a floppy drive as the default drive, make sure that there is a diskette is inserted in that drive. Otherwise, DOS gives the following message:
"Not ready reading drive A
Abort, Retrieve, Fail ?
If you get this message, insert a diskette in the floppy drive and then press "r" to Retrieve.
What are the categories of Radio communication 1. Sky wave or ionosphere communication 2. Line-of-sight (LOS) microwave communication limited by horizon 3. Troposphere
Performance of caches: Amdahl's Law regarding overall speed up: Alternatively, CPU stall can be considered:
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How many bits are required at the input of a ladder D/A converter, if it is required to give a resolution of 5mV and if the full scale output is +5V. Find the %age resolution.
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Q. Explain Processing of an Interrupt? The interrupt is processed as: Step 1: Number field in INT instruction is multiplied by 4 to get its entry in interrupt vector table.
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Give brief explanation about the keyboards Keyboards are generally not offered as the number of options is limited and owners of the system do not want customers keying in info
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