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Microprocessor

Microprocessor
In Fortran 77 a variable name can contain special characters.

False
True

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Microprocessor
While using a frequency counter for measuring frequency, two modes of measurement are possible: Period time Frequency mode There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4MHz, the crossover frequency is given by

 8 Mhz.
 1Khz.
 2 Mhz.
 2 Khz.

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Microprocessor
The number of output pins in 8085 microprocessors are

 19.
 27.
 21.
 40.

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Microprocessor
The character set of Fortran 77 includes lower case alphabets a to z.

False
True

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Microprocessor
For the number A[15:0] = 0110110010001111, A[14:13] is ______ A[3:2].

Greater than
Cannot be determined
The same as
Less than

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Microprocessor
The operating modes of 8255 A are called

Mode 0 and mode 2
Mode 0 and mode 1
Mode 0, mode 1 and mode 2
Mode 0, mode 2 and mode 3

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