Microprocessor

Microprocessor MCQ (Multiple Choice Questions) - SchoolingAxis

1. High speed USB devices neglect a. Handshake packet b. Token packet c. PRE packet d. Data packet Ans- c. PRE packet 2. The bit packet that commands the device either to receive data or transmit data in transmission of USB async…

Microprocessor MCQ (Multiple Choice Questions) - SchoolingAxis

1. Which of the following is not a mode of data transmission? a. simplex b. duplex c. semi duplex d. half duplex Ans- c. semi duplex 2. If any change in sensor value is detected at the end of a sensor matrix scan, then the IRQ l…

Microprocessor MCQ (Multiple Choice Questions) - SchoolingAxis

1. The registers that store the keyboard and display modes and operations programmed by CPU are a. I/O control and data buffers b. Control and timing registers c. Return buffers d. Display address registers Ans- b. Control and t…

Microprocessor MCQ (Multiple Choice Questions) - SchoolingAxis

1. The control word register contents are used for a. initializing the operating modes b. selection of counters c. choosing binary/BCD counters d. all of the mentioned Ans- d. all of the mentioned 2. The counter starts counting …

Microprocessor MCQ (Multiple Choice Questions) - SchoolingAxis

1. The Isolation transformers are generally used for a. protecting low power circuit b. isolation c. protecting low power circuit and isolation d. none Ans- c. protecting low power circuit and isolation 2. The firing angles of t…

Microprocessor MCQ (Multiple Choice Questions) - SchoolingAxis

1. The pin that clears the control word register of 8255 when enabled is a. CLEAR b. SET c. RESET d. CLK Ans- c. RESET 2. The function, 'data bus tristated' is performed when a. CS(active low) = 1 b. CS(active low) = 0 c…

Microprocessor MCQ (Multiple Choice Questions) - SchoolingAxis

1. In memory-mapped scheme, the devices are viewed as a. distinct I/O devices b. memory locations c. only input devices d. only output devices Ans- b. memory locations 2. In 74LS245, if DIR is 1, then the direction is from a. in…

Microprocessor MCQ (Multiple Choice Questions) - SchoolingAxis

1. In the signal integrate phase, the differential input voltage between IN LO(input low) and IN HI(input high) pins is integrated by the internal integrator for a fixed period of a. 256 clock cycles b. 1024 clock cycles c. 2048…

Microprocessor MCQ (Multiple Choice Questions) - SchoolingAxis

1. The feature of mode 2 of 8255 is a. single 8-bit port is available b. both inputs and outputs are latched c. port C is used for generating handshake signals d. all of the mentioned Ans- d. all of the mentioned 2. The signals …

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