In one’s complement 8 bit representation 11111111 represents
Select an option to see the answer and solution.
Circuit A is a 1-bit adder; circuit B is a 1 bit multiplier. [Hint: Construct the truth table for the adder and the multiplier]
A. Circuit A has more gates than circuit B
B. Circuit B has more gates than circuit A
C. Circuit A has the same number of gates as circuit B
D. None of the above
Select an option to see the answer and solution.
An e-mail message can be sent to many recipients.
Select an option to see the answer and solution.
For the number A[15:0] = 0110110010001111, A[14:13] is ______ A[3:2].
A. Less than
B. Greater than
C. The same as
D. Cannot be determined
Select an option to see the answer and solution.
The five flags in 8085 are designated as
A. Z, CY, S, P and AC
B. D, Z, S, P, AC
C. Z, C, S, P, AC
D. Z, CY, S, D, AC
Select an option to see the answer and solution.
A 37 bit mantissa has an accuracy of
A. 6 decimal places
B. 8 decimal places
C. 10 decimal places
D. 11 decimal places
Select an option to see the answer and solution.
DS directive in 8085
A. Forces the assembler to reserve one byte of memory
B. Forces the assembler to reserve a specified number of bytes in the memory
C. Forces the assembler to reserve a specified number of consecutive bytes in the memory
D. None of the above
Select an option to see the answer and solution.
Because we wish to allow each ASCII code to occupy one location in memory, most memories are __________ addressable.
A. BYTE
B. NIBBLE
C. WORD (16 bits)
D. DOUBLEWORD (32 bits)
Select an option to see the answer and solution.
We say that a set of gates is logically complete if we can build any circuit without using any other kind of gates. Which of the following sets are logically complete
A. Set of {AND,OR}
B. Set of {EXOR, NOT}
C. Set of {AND,OR,NOT}
D. None of the above
Select an option to see the answer and solution.
In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is
A. Assignment, relational, arithmetic
B. Relational, assignment, arithmetic
C. Arithmetic, assignment, relational
D. Arithmetic, relational, assignment
Select an option to see the answer and solution.
In 8086 the number of bytes which can be addressed directly is about
A. 1000
B. 10000
C. 100000
D. one million
Select an option to see the answer and solution.
In a computer the data transfer between hard disk and CPU is nearly the same as that between diskette and CPU.
Select an option to see the answer and solution.
Which of the following pair of gates can form a latch?
A. A pair of cross coupled OR
B. A pair of cross copled AND
C. A pair of cross coupled NAND
D. A cross coupled NAND/OR
Select an option to see the answer and solution.
Assertion (A): Each memory chip has its own address latch.
Reason (R): ALE signal comes out of microprocessor 8085 and goes to memory chip.
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct R is wrong
D. A is wrong R is correct
Select an option to see the answer and solution.
When the write enable input is not asserted, the gated D latch _________ its output.
A. Can not change
B. Clears
C. Sets
D. Complements
Select an option to see the answer and solution.
For a memory with a 16-bit address space, the addressability is
A. 16 bits
B. 8 bits
C. 216 bits
D. Cannot be determined
Select an option to see the answer and solution.
Which of the following is a valid integer constant?
A. 127
B. 127.0
C. 127.3
D. 125 + 3
Select an option to see the answer and solution.
In 8085
A. P flag is set when the result has even parity
B. P flag is set when the result has odd parity
C. P flag is reset when the result has odd parity
D. P flag is reset when the result has even parity
Select an option to see the answer and solution.
In 8085 which addressing mode is also called inherent addressing?
A. Direct
B. Register
C. Implicit
D. Immediate
Select an option to see the answer and solution.
Internet is a worldwide network of computers where most of the information is freely available.
Select an option to see the answer and solution.