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Microprocessors And Microcontrollers MCQ Questions & Answers | ECE

Learn Microprocessors And Microcontrollers MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Microprocessors And Microcontrollers MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-6 section-1

Each section contains 100 MCQs on Microprocessors and Microcontrollers .
51
In microprocessor's stack, what does the operation push cx means?
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Answer & Solution
Answer: Option A
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52
How many bits are used as conditional flags in the flag register of 8086?
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Answer & Solution
Answer: Option D
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53
If B7 and B6 bits of mode register in 8237 are set to 11, which mode of operation is selected?
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Answer & Solution
Answer: Option A
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54
The address bus of Intel 8085 is 16-bit wide and hence the memory which can be accessed by this address bus is
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Answer & Solution
Answer: Option D
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55
What is the size(in bits) of the stack pointer in 8085?
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Answer & Solution
Answer: Option D
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56
Interrupt latency is the time elapsed between:
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Answer & Solution
Answer: Option B
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57
1. Program Counter (PC) Pushed to Stack
2. Generate LCALL to ISR
3. Complete Execution of instruction in progress
4. Clear the interrupt flag
5. Set interrupt in progress
Correct order of execution of action taken by 8051 micro-controllers when an interrupt occurs:
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Answer & Solution
Answer: Option A
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58
Which of the 8086 instruction can be used to fetch a string of 16-bit word stored in memory, automatically incrementing the memory pointer?
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Answer & Solution
Answer: Option B
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59
Which of the following are two most commonly used industry standards for interchip serial communications?
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Answer & Solution
Answer: Option C
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60
Consider the following instruction of 8085 µP.
1. MOV M, A
2. ADD C
3. MVI A, FF
4. CMP M
Which of these cause change in the status of flag(s)?
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Answer & Solution
Answer: Option D
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