Q. In 8086

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Q. In which of the following logical group instructions of 8085 do the contents of accumulator remain unchanged?

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Q. If quadratic equation x² - 1000x + 25 = 0 is solved using floating point arithmetic with 4 digit mantissa, the roots are

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Q. Assertion (A): In microprocessor 8085 DMA allows direct access to memory to speed up data transfer.

Reason (R): HOLD and HLDA signals are used for DMA operations.

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Q. Which of the following is not a valid variable in FORTRAN 77?

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Q. The expression A ** B / C + D is equivalent to

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Q. Consider the following symbols

1. Letters A to Z and a to z
2. Digits 0 to 9
3. Logical operators and, or, not
4. Parenthesis ( )

Which of the above symbols are available in Pascal?

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Q. Which of the following 8085 instructions does not belong to arithmetic group?

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Q. Which characteristics of a memory chip is called dc characteristics?

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Q. RAM is a volatile memory device.

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Q. Consider the following strings:

1. A
2. Z2
3. X3Y
4. P12R
5. BX

Which of the above strings are valid in Pascal?

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Q. Consider the following statements:

1. In 8085 address and data buses are multiplexed.
2. In Z 80 address and data buses are multiplexed.
3. In Z 80 address and data buses are not multiplexed.
4. Z 80 has 16 bit address bus and 8 bit data bus.

Which of the above statements are correct?

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Q. The stack pointer holds the address of the desired memory location.

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Q. DMA stands for direct memory access.

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Q. - 56 is not a valid real constant in Fortran.

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Q. For the infix expression (A/B) * (C * F + (A - D) * E) the corresponding Post fix notation is

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Q. A PC has typically

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Q. Which of the following is true?

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Q. DMA stands for

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Q. 8085 data bus has 8 lines and is bidirectional.

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