The 8051 Microcontroller

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The 8051 Microcontroller MCQ & Objective Questions

The 8051 Microcontroller is a crucial topic for students preparing for various school and competitive exams in India. Understanding this microcontroller not only helps in grasping fundamental concepts but also enhances your ability to tackle MCQs effectively. Practicing objective questions related to The 8051 Microcontroller can significantly improve your exam scores and boost your confidence. Dive into these practice questions to ensure you are well-prepared for your upcoming exams.

What You Will Practise Here

  • Architecture and pin configuration of The 8051 Microcontroller
  • Instruction set and programming concepts
  • Interfacing techniques with sensors and actuators
  • Memory organization and data storage in The 8051
  • Timers and counters: their functions and applications
  • Interrupts and their handling in The 8051 Microcontroller
  • Common applications and real-world usage scenarios

Exam Relevance

The 8051 Microcontroller is frequently featured in CBSE, State Boards, NEET, and JEE exams. Students can expect questions that test their understanding of its architecture, programming, and interfacing. Common question patterns include multiple-choice questions that require students to identify the correct pin configuration or the appropriate instruction for a given task. Mastering this topic will give you an edge in both theoretical and practical examinations.

Common Mistakes Students Make

  • Confusing the functions of different pins in the microcontroller
  • Misunderstanding the instruction set and its applications
  • Overlooking the significance of timers and interrupts
  • Failing to relate theoretical concepts to practical applications

FAQs

Question: What is the primary function of The 8051 Microcontroller?
Answer: The 8051 Microcontroller is used for controlling devices and processing data in embedded systems.

Question: How can I prepare effectively for The 8051 Microcontroller questions in exams?
Answer: Regular practice of MCQs and understanding the core concepts will help you prepare effectively.

Don't miss the opportunity to enhance your understanding of The 8051 Microcontroller. Start solving practice MCQs today and test your knowledge to achieve better results in your exams!

Q. How many 16-bit timers/counters are available in the 8051 microcontroller?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. How many 8-bit registers does the 8051 microcontroller have?
  • A. 4
  • B. 8
  • C. 32
  • D. 16
Q. How many external interrupts does the 8051 support?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. What is the function of the 'TCON' register in the 8051?
  • A. Timer control
  • B. Interrupt control
  • C. Serial communication
  • D. Port control
Q. What is the function of the PSEN pin in the 8051 microcontroller?
  • A. Program Store Enable
  • B. Power Supply Enable
  • C. Peripheral Select Enable
  • D. Program Select Enable
Q. What is the maximum clock frequency of the 8051 microcontroller?
  • A. 1 MHz
  • B. 12 MHz
  • C. 24 MHz
  • D. 40 MHz
Q. What is the purpose of the 'MOV' instruction in the 8051 assembly language?
  • A. To add two numbers
  • B. To move data from one location to another
  • C. To compare two values
  • D. To jump to a different part of the program
Q. What is the purpose of the accumulator in the 8051 microcontroller?
  • A. Data storage
  • B. Arithmetic operations
  • C. Control operations
  • D. Input/output operations
Q. What is the size of the internal RAM in the 8051 microcontroller?
  • A. 128 bytes
  • B. 256 bytes
  • C. 512 bytes
  • D. 64 bytes
Q. Which instruction is used to clear a specific bit in the 8051 microcontroller?
  • A. CLR
  • B. CPL
  • C. ANL
  • D. ORL
Q. Which instruction is used to clear a specific bit in the 8051?
  • A. CLR
  • B. CPL
  • C. SETB
  • D. ANL
Q. Which of the following interrupts has the highest priority in the 8051 microcontroller?
  • A. External Interrupt 0
  • B. Timer 0 Interrupt
  • C. External Interrupt 1
  • D. Timer 1 Interrupt
Q. Which of the following is a special function register in the 8051?
  • A. Accumulator
  • B. Program Counter
  • C. Stack Pointer
  • D. All of the above
Q. Which of the following is not a mode of operation for the 8051 timer?
  • A. Mode 0
  • B. Mode 1
  • C. Mode 2
  • D. Mode 3
Q. Which of the following is NOT a mode of operation for the 8051 timers?
  • A. Mode 0
  • B. Mode 1
  • C. Mode 2
  • D. Mode 3
Q. Which pin of the 8051 microcontroller is used for external interrupt 0?
  • A. P0.0
  • B. P1.0
  • C. P2.0
  • D. P3.2
Q. Which port in the 8051 microcontroller is used for serial communication?
  • A. Port 0
  • B. Port 1
  • C. Port 2
  • D. Port 3
Q. Which port on the 8051 microcontroller is used for serial communication?
  • A. Port 0
  • B. Port 1
  • C. Port 2
  • D. Port 3
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