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Computer Science Engineering (CSE) Exam  >  Computer Science Engineering (CSE) Questions  >  The resistor which is attached to the service... Start Learning for Free
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 The resistor which is attached to the service line is called _____
  • a)
    Push-down resistor
  • b)
    Pull-up resistor
  • c)
    Break down resistor
  • d)
    Line resistor
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
The resistor which is attached to the service line is called _____a)Pu...
Answer: b
Explanation: This resistor is used to pull up the voltage of the interrupt service line.
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Most Upvoted Answer
The resistor which is attached to the service line is called _____a)Pu...
Explanation:

A pull-up resistor is the correct answer for the question.

Definition:
A pull-up resistor is a resistor connected between a signal line and a positive power supply voltage to ensure that the signal line is high (logic 1) when it is not being actively driven low (logic 0).

Function:
The purpose of a pull-up resistor is to ensure that the signal line is in a defined state when it is not being actively driven. It pulls the voltage on the signal line up to the positive power supply voltage, keeping it at a high logic level.

Usage:
Pull-up resistors are commonly used in digital circuits, especially in open-drain or open-collector configurations. In these configurations, the output stage of a device can only pull the signal line low, but cannot actively drive it high. The pull-up resistor ensures that the signal line is pulled high when the output stage is not actively driving it low.

Alternatives:
- Push-down resistor: This term does not exist and is not commonly used in electronics. It does not describe a known resistor configuration or function.
- Breakdown resistor: This term does not describe a resistor configuration or function commonly used in the context of service lines.
- Line resistor: This term is too generic and does not describe a specific resistor configuration or function. It could refer to any resistor connected to a line in a circuit.
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On a non-pipelined sequential processor, a program segment, which is a part of the interrupt service routine, is given to transfer 500 bytes from an I/O device to memory.Initialize the address registerInitialize the count to 500LOOP: Load a byte from deviceStore in memory at address given by address registerIncrement the address registerDecrement the countIf count != 0 go to LOOPAssume that each statement in this program is equivalent to a machine instruction which takes one clock cycle to execute if it is a non-load/store instruction. The load-store instructions take two clock cycles to execute.The designer of the system also has an alternate approach of using the DMA controller to implement the same transfer. The DMA controller requires 20 clock cycles for initialization and other overheads. Each DMA transfer cycle takes two clock cycles to transfer one byte of data from the device to the memory.Q. What is the approximate speedup when the DMA controller based design is used in place of the interrupt driven program based input-output?

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The resistor which is attached to the service line is called _____a)Push-down resistorb)Pull-up resistorc)Break down resistord)Line resistorCorrect answer is option 'B'. Can you explain this answer?
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