AP ECET COMPUTER SCIENCE AND ENGINEERING Multiple Choice Questions (MCQs)
AP ECET CSE MCQs - Computer Organisation and Microprocessors
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Which of the following is NOT a function of the CPU?
- a) Fetching instructions
- b) Decoding instructions
- c) Performing arithmetic operations
- d) Generating interrupts
Answer: d) Generating interrupts
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In a computer system, the ALU is responsible for:
- a) Memory management
- b) Arithmetic and logical operations
- c) Data input and output
- d) Data storage
Answer: b) Arithmetic and logical operations
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Which of the following is used to perform multiplication in the 8086 microprocessor?
- a) MUL instruction
- b) DIV instruction
- c) ADD instruction
- d) MOV instruction
Answer: a) MUL instruction
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The basic unit of memory organization in a computer system is:
- a) Byte
- b) Bit
- c) Word
- d) Data register
Answer: a) Byte
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What does the term "I/O Organization" refer to in computer architecture?
- a) How data is fetched from memory
- b) How input/output devices are connected and managed
- c) The storage of data in CPU registers
- d) How data is transferred between different memory blocks
Answer: b) How input/output devices are connected and managed
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In the 8086 microprocessor, which of the following is used for handling interrupts?
- a) Segment registers
- b) Interrupt vector table
- c) Data register
- d) Stack pointer
Answer: b) Interrupt vector table
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Which of the following is the primary function of the instruction pointer in the CPU?
- a) Stores data for processing
- b) Holds the address of the next instruction to be executed
- c) Holds the status of the processor
- d) Points to the current stack memory
Answer: b) Holds the address of the next instruction to be executed
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What type of data representation is used for negative numbers in most modern computers?
- a) Sign and magnitude
- b) One's complement
- c) Two's complement
- d) BCD (Binary Coded Decimal)
Answer: c) Two's complement
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Which of the following is the primary function of the 8086 microprocessor’s bus interface unit (BIU)?
- a) Performing arithmetic operations
- b) Fetching instructions from memory
- c) Managing input and output devices
- d) Managing the stack operations
Answer: b) Fetching instructions from memory
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Which register in the 8086 microprocessor holds the address of the next instruction to be executed?
- a) AX
- b) BX
- c) IP
- d) DX
Answer: c) IP
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In the 8086 microprocessor, the segment registers are used to:
- a) Store data
- b) Address the memory
- c) Perform arithmetic operations
- d) Store control flags
Answer: b) Address the memory
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Which of the following is a characteristic of the 8086 microprocessor?
- a) 8-bit processor
- b) 16-bit processor
- c) 32-bit processor
- d) 64-bit processor
Answer: b) 16-bit processor
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Which type of memory is directly accessible by the CPU in a computer system?
- a) Secondary memory
- b) Tertiary memory
- c) Primary memory
- d) External memory
Answer: c) Primary memory
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In the 8086 microprocessor, what is the size of the data bus?
- a) 8 bits
- b) 16 bits
- c) 32 bits
- d) 64 bits
Answer: b) 16 bits
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Which of the following is the function of the flag register in the 8086 microprocessor?
- a) To store the data
- b) To store memory addresses
- c) To hold status flags indicating the result of arithmetic and logic operations
- d) To store instructions for execution
Answer: c) To hold status flags indicating the result of arithmetic and logic operations
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