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Test: Microprocessors - 1 - Electronics and Communication Engineering (ECE) MCQ


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15 Questions MCQ Test GATE ECE (Electronics) Mock Test Series 2025 - Test: Microprocessors - 1

Test: Microprocessors - 1 for Electronics and Communication Engineering (ECE) 2024 is part of GATE ECE (Electronics) Mock Test Series 2025 preparation. The Test: Microprocessors - 1 questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The Test: Microprocessors - 1 MCQs are made for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Microprocessors - 1 below.
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Test: Microprocessors - 1 - Question 1

Address bus and data bus in 8085 μp respectively are

Detailed Solution for Test: Microprocessors - 1 - Question 1

Address bus is unidirectional while data bus is bidirectional.

Test: Microprocessors - 1 - Question 2

Maximum memory that we can interface to 8085 up is _______________ byte

Detailed Solution for Test: Microprocessors - 1 - Question 2

Address lines in 8085 μp = 16 lines so maximum memory which can be interfaced to 8085 μp

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Test: Microprocessors - 1 - Question 3

Which signal is used to demultiplex lower address byte and data byte

Detailed Solution for Test: Microprocessors - 1 - Question 3

ALE (address latch enable) is used to demultiplex lower address byte and data byte.

Test: Microprocessors - 1 - Question 4

Ready signal is used to

Detailed Solution for Test: Microprocessors - 1 - Question 4

Ready signal is used to synchronise slow peripheral with microprocessor.

Test: Microprocessors - 1 - Question 5

What is the difference between I/O mapped I/O and memory mapped I/O.

Detailed Solution for Test: Microprocessors - 1 - Question 5

In case of I/O mapped I/O 8 bit address is used to identify I/O while in case of memory mapped I/O 16 bit address is used to identify I/O.

Test: Microprocessors - 1 - Question 6

Frequency of operation of 8085 microprocessor is ______________    MHz

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Frequency of operation of 8085 microprocessor is 3 MHz.

Test: Microprocessors - 1 - Question 7

Bit position of five flags in flag register is given. Which one of the following is correct?

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Test: Microprocessors - 1 - Question 8

How many buses are connected as part of the 8085A microprocessor?

Test: Microprocessors - 1 - Question 9

LDAXBThe addressing mode is

Detailed Solution for Test: Microprocessors - 1 - Question 9

The addressing mode is indirect because the address of the data is given indirectly by the content of BC pair.

Test: Microprocessors - 1 - Question 10

In logical operations one operand is always.

Detailed Solution for Test: Microprocessors - 1 - Question 10

In logical operations one operand is always accumulator.

Test: Microprocessors - 1 - Question 11

Which flag is affected, when instruction CMA is executed.

Detailed Solution for Test: Microprocessors - 1 - Question 11

due to execution of CMA (complement the accumulator) none of the flags are affected.

Test: Microprocessors - 1 - Question 12

8155 is

Detailed Solution for Test: Microprocessors - 1 - Question 12

8155 is a programmable I/O ports and timer.

Test: Microprocessors - 1 - Question 13

DAD instruction has

Detailed Solution for Test: Microprocessors - 1 - Question 13

DAD instruction only affects the carry flag when result exceeded 16 bits.

Test: Microprocessors - 1 - Question 14

DAA is used to

Detailed Solution for Test: Microprocessors - 1 - Question 14

DAA is a one byte instructions used for changing the content of accumulator from binary value to two 4-bit binary coded decimal digits.

Test: Microprocessors - 1 - Question 15

Assume HL pair contains 20FFH.Which instruction will transfer the program to location 20FFH?

Detailed Solution for Test: Microprocessors - 1 - Question 15

PCHL →• It implies that content of HL are copied to program counter so when 20FFH is loaded to PC, program will transfer to location 20FFH.

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