The first machine cycle of an instruction is always A memory write cycle A fetch cycle A memory read cycle An I/O read cycle TRUE ANSWER : ? YOUR ANSWER : ?
Let the content of accumulator and register B be 0000 0100 and 0100 0000 respectively before execution of instruction SUB B. The content of accumulator after the execution of this instruction will be 01000000 00000100 11000100 010001000 TRUE ANSWER : ? YOUR ANSWER : ?
CALL instruction is a ______ instruction. 1 bytes 4 bytes 2 bytes 3 bytes TRUE ANSWER : ? YOUR ANSWER : ?
When any data transfer instruction, to transfer the data from memory to microprocessor, is executed the condition flags are always set affected indicating specific conditions not affected always reset TRUE ANSWER : ? YOUR ANSWER : ?
The microprocessor may be made to exit from HALT state by asserting any of the five interrupt lines READY line A or B or HOLD line RESTART TRUE ANSWER : ? YOUR ANSWER : ?
EPROMs are preferred for storing programs while developing new microprocessor based system. Because of their random access characteristic all the above characteristic erasable and programmable characteristic non-volatile characteristic TRUE ANSWER : ? YOUR ANSWER : ?
Internet is a worldwide network of computers where most of the information is freely available. True False TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not true during the execution of an interrupt service routine, which does not contain any EI instructions the microprocessor cannot be interrupted by any mask able interrupt the microprocessor cannot be interrupted by any interrupt the microprocessor can be interrupted by a non-mask able interrupt all interrupts except non-maskable interrupt are disabled TRUE ANSWER : ? YOUR ANSWER : ?
The number of status flags present in 8085 microprocessor are 10 5 16 8 TRUE ANSWER : ? YOUR ANSWER : ?
Assertion(A): The frequency of 8085 system is ½ of the crystal frequency. Reason(R): Microprocessor (8085) requires a two phase clock. Both A & R are true but R is not the correct explanation of A Both A & R are true and R is the correct explanation of A A is false but R is true A is true but R is false TRUE ANSWER : ? YOUR ANSWER : ?