Description : In microcontroller and LCD interface which line will instruct the LCD that microcontroller is sending data? a) DB0 b) RW c) EN d) RS
Last Answer : d) RS
Description : Draw interfacing of 16 × 2 LCD with 8051 and state the function of EN and RS of LCD
Last Answer : Diagram: RS: RS is the register select pin. We need to set it to 1, if we are sending some data to be displayed on LCD. And we will set it to 0 if we are sending some command instructions ... the LCD to latch in the data present at the data pins. This pulse must be a minimum of 450ns wide.
Description : Draw the labeled interfacing diagram to interface relay with 89C51 microcontroller.
Last Answer : the labeled interfacing diagram to interface relay with 89C51 microcontroller
Description : Basic concepts in memory interfacing
Last Answer : The primary function of memory interfacing is that the microprocessor should be able to read from and write into a given register of a memory chip. To perform these operations the microprocessor ... Be able to select the chip Identify the register Enable the appropriate buffer
Description : Interfacing devices for DMA controller, programmable interval timer are respectively…a) 8257, 8253 b) 8253, 8257 c) 8257,8251 d)8251,825721.
Last Answer : a) 8257, 8253
Description : Which is the type of memory for information that does not change on your computer? a. RAM b. ROM c. ERAM d. RW / RAM
Last Answer : b. ROM
Description : In 8279 Strobed input mode, the control line goes low. The data on return lines is strobed in the ____. a) FIFO byte by byte b) FILO byte by byte c) LIFO byte by byte d) LILO byte by byte.
Last Answer : a) FIFO byte by byte
Description : How many address lines in a 4096 x 8 EPROM CHIP?
Last Answer : 12 address lines.
Description : How many address lines are needed to address each memory locations in a 2048 x 4 memory chip? a. 10 b. 11 c. 8 d. 12
Last Answer : b. 11
Description : How many address lines are needed to address each memory location in a 2048 x 4 memory chip? a. 10 b. 11 c. 8 d. 12
Description : how many address lines are needed to address each machine location in a 2048 x 4 memory chip? a. 10 b. 11 c. 8 d. 12
Description : The upper red arrow show that CPU sends out the control signals____ and _____ indicate the data is read from the memory: a. Memory request b. Read c. Both A and B d. None of these
Last Answer : c. Both A and B
Description : _____ a subsystem that transfer data between computer components inside a computer or between computer: a. Chip b. Register c. Processor d. Bus
Last Answer : d. Bus
Description : A non-erasable disk that stores digitized audio information is _____ a) CD b) CD-ROM c) DVD-R d) DVD-RW
Last Answer : Answer: a Explanation: A compact disk stores digitized audio information. The standard system uses 12 cm disks and can record more than 60 minutes of uninterrupted playing game
Description : Explain the signals HOLD, READY and SID
Last Answer : HOLD indicates that a peripheral such as DMA controller is requesting the use of address bus, data bus and control bus. READY is used to delay the microprocessor ... slow responding peripheral is ready to send or accept data. SID is used to accept serial data bit by bit
Description : Control signals used for DMA operation are ____________
Last Answer : HOLD & HLDA.
Description : Which of the following is form of semi conductor memory in which it is possible to change the contents of selected memory locations by applying suitable electrical signals? a. CAM b. ROM c. EPROM d. Abacus
Last Answer : c. EPROM
Description : In which form CPU provide output: a. Computer signals b. Digital signals c. Metal signals d. None of these
Last Answer : b. Digital signals
Description : One of the following signals belongs to the 8087 coprocessor is a. HOLD b. BUSY c. TEST d. NMI
Last Answer : c. TEST
Description : How Can Signals Be Classified For The 8085 Microprocessor?
Last Answer : Answer :The signals of the 8085 microprocessor based on their functions can be classified into 7 categories namely: Frequency and power signals Address and data buses The control bus Interrupt Signals Serial Input / Output signals DMA signals Reset Signals
Description : 8096 has ___ general purpose I/O ports, Port 2 includes ______ of the following i) two quasi-bidirectional I/O lines ii) two output lines iii) four input lines iv) open drain outputs a) 4, i, iv b) 6, ii, iii c) 4, i,ii,iii d) 6, i, ii, iv
Last Answer : c) 4, i,ii,iii
Description : Motorola introduced _____ processor: a. 2 bit-RISC b. 4 bit-RISC c. 8 bit-RISC d. 32 bit-RISC
Last Answer : d. 32 bit-RISC
Description : In 8087, _______ many register stack are there? And of _____ registers. These registers are used as _________ stack. a) 7, 40 bit, FIFO. b) 8, 60 bit, LILO. c) 8, 80 bit, LIFO d) 7, 80 bit, FILO.
Last Answer : b) 8, 60 bit, LILO.
Description : The 8279 normally provides a maximum of _____ seven segment display interface with CPU. a) 8 b) 16 c) 32 d) 18
Last Answer : a) 8
Description : Which pin of port 3 is has an alternative function as write control signal for external data memory? a) P3.8 b) P3.3 c) P3.6 d) P3.1
Last Answer : d) P3.1
Last Answer : c) P3.6
Description : A modem- 1) Translates along Signals from a computer into digital Signals that can travel along conventional telephone lines 2) Translates digital Signals from a computer into analog Signals that can ... conventional telephone lines 3) Demodulates digital Signals from a computer. 4) None of these
Last Answer : 4) None of these
Description : Which of the following is a data interfacing format? a.HP/GL b.ACER c.ASUS d.IBM
Last Answer : a.HP/GL
Description : Which of the following is not a data interfacing format? a.STL b.SLC c.LEAF d.RP
Last Answer : d.RP
Description : Which of the following is characteristic of an MIS? (A) Provides guidance in identifying problems, finding and evaluating alternative solutions, and selecting or comparing alternatives. (B) Draws on ... Has as its goal the efficiency of data movement and processing and interfacing different TPS.
Last Answer : (B) Draws on diverse yet predictable data resources to aggregate and summarize data.
Description : In 8255, under the I/O mode of operation we have __ modes. Under which mode will have the following features i) A 5 bit control port is available. ii) Three I/O lines are available at Port C. a) 3, Mode2 b) 2, Mode 2 c) 4, Mode 3 d) 3, Mode 2
Last Answer : a) 3, Mode2
Description : Which of the following conditions is not allowed in an RS latch? a. R is asserted, S is asserted b. R is asserted, S is negated c. R is negated, S is asserted d. R is negated, S is negated
Last Answer : a. R is asserted, S is asserted
Description : Of the following circuits, the one which involves storage is a. RS Latch b. mux c. nand d. decoder
Last Answer : a. RS Latch
Description : In 8096, mode ____ of serial port are ___ modes commonly used for ____ communications. a) 1, 8bit, single processor b) 0, 7bit, multiple microcontroller c) 2, 9 bit, multiple processors d) 3, 8 bit, multiple microcontroller
Last Answer : a) 1, 8bit, single processor
Last Answer : c) 2, 9 bit, multiple processors
Description : A CD-RW disk- 1) Has a faster access than an internal disk 2) Is a form of optical disk, so it can only be written once 3) Holds less data than a floppy disk 4) Can be erased and rewritten
Last Answer : 4) Can be erased and rewritten
Description : Which media have the ability to have data/information stored (written) on them by users more than once? 1) CD-R disks 2) CD-RW disks 3) Zip disks 4) Optical Disks
Last Answer : 2) CD-RW disks
Description : Which media have the ability to have data/information stored (written) on them by users more than once? 1 CD-R disks 2 CD-RW disks 3 Zip disks 4 Optical Disks
Last Answer : 2 CD-RW disks
Description : Mention the purpose of SID and SOD lines
Last Answer : SID (Serial input data line): It is an input line through which the microprocessor accepts serial data. SOD (Serial output data line): It is an output line through which the microprocessor sends output serial data.
Description : If m is a power of 2, the number of select lines required for an m-input mux is: a. m b. 2^m c. log2 (m) d. 2*m
Last Answer : c. log2 (m)
Description : Different components on the motherboard of a PC processor unit are linked together by sets or parallel electrical conducting lines. What are these lines called? a. Conductors b. Buses c. Connectors d. Connectively
Last Answer : b. Buses
Description : Which of the following does not affect the resolution of a video display image? a. Bandwidth b. Raster scan rage c. Vertical and horizontal lines of resolution d. Screen size
Last Answer : d. Screen size
Description : Which statement is wrong according to linear decoding : a. Address map is not contiguous. b. Confects occur if two of the select lines become active at the same time c. If all unused address lines are not used as chip selectors then these unused lines become don’t cares d. None of these
Last Answer : d. None of these
Description : How many types of microprocessor comprises: a. 3 b. 6 c. 9 d. 4
Last Answer : a. 3
Description : The Width of a processor’s data path is measured in bits. Which of the following are common data paths? a. 8 bits b. 12 bits c. 16 bits d. 32 bits
Last Answer : a. 8 bits
Description : The data recording format in most of the modern magnetic tape is a. 7-bit ASCII b. 7-bit EBCDIC c. 8-bit ASCII d. 8-bit EBCDIC
Last Answer : d. 8-bit EBCDIC
Description : Why 8085 processor is called an 8 bit processor? a) Because 8085 processor has 8 bit ALU. b) Because 8085 processor has 8 bit data bus. c) a & b.
Last Answer : a) Because 8085 processor has 8 bit ALU.
Description : Pentium Pro can address _____ of memory: a. 4 GB b. 128 GB c. 256 GB d. 512 GB
Last Answer : a. 4 GB
Description : The organization of I/O devices create a difference between _____: a. Digital computer b. Micro computer c. A and B d. None of these
Last Answer : c. A and B