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721.

In serial data transmission, every byte of data is padded with a ‘0’ in the beginning and one or two ‘1’s at the end of byte because [1 mark]
(a) Receiver is to be synchronized for byte reception
(b) Receiver recovers lost ‘0’s and ‘1’s from these padded bits
(c) Padded bits are useful in parity computation
(d) None of the above

asked in Computer Science And Engineering, 2002

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722.

In 8085 which of the following modifies the program counter? [1 mark]
(a) Only PCHL instruction
(b) Only ADD instructions
(c) Only JMP and CALL instructions
(d) All instructions

asked in Computer Science And Engineering, 2002

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723.

A device employing INTR line for device interrupt puts the CALL instruction on the data bus while [1 mark]
(a) INTA is active
(b) HOLD is active
(c) READY is active
(d) None of the above

asked in Computer Science And Engineering, 2002

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724.

“If X then Y unless Z” is represented by which of the following formulas in prepositional logic? (“ ¬ “, is negation, “^” is conjunction, and “->” is implication) [1 mark]
(a) (X^¬Z)->Y
(b) (X^Y)->¬Z
(c) X->(Y^¬Z)
(d) (X->Y)^¬Z

asked in Computer Science And Engineering, 2002

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725.

The language accepted by a Pushdown Automaton in which the stack is limited to 10 items is best described as [1 mark]
(a) Context free
(b) Regular
(c) Deterministic Context free
(d) Recursive

asked in Computer Science And Engineering, 2002

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726.

Which of the following is true? [1 mark]
(a) The set of all rational negative numbers forms a group under multiplication.
(b) The set of all non-singular matrices forms a group under multiplication.
(c) The set of all matrices forms a group under multiplication.
(d) Both B and C are true.

asked in Computer Science And Engineering, 2002

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