What is the use of bi-directional buffers?

1 Answer

Answer :

It is used to increase the driving capacity of the data bus. The data bus of a  microcomputer system is bi-directional, so it requires a buffer that allows the data  to flow in both directions.

Related questions

Description : Which of the following statements on DRAM are correct? i) Page mode read operation is faster than RAS read. ii) RAS input remains active during column address strobe. iii) The row and column addresses are strobed into the ... RAS and CAS inputs respectively. a) i & iii b) i & ii c) all d) iii

Last Answer : d) iii

Description : Many Dot Matrix printers are ________ A. uni-directional B. bi-directional C. multi-directional D. None of the Above

Last Answer : B. bi-directional

Description : Why bi-directional flow is chosen for PHT system?

Last Answer : Bi-directional flow is chosen for PHT system because, a. Uniform temperature gradient is facilitated so there will be no differential thermal expansion. b. It facilitates fuelling even when the ... , which facilitates uniform neutron flux and this intern gives rise to maximum fuel burns up. 

Description : What is the direction of movement of sugars in phloem? (a) Bi-directional (b) Non-multidirectional (c) Upward (d) Downward

Last Answer : (a) Bi-directional

Description : What is the name of the network topology in which there are bi- directional links between eachpossible node? A) Ring B) Star C) Tree D) Mesh

Last Answer : D) Mesh

Description : The network topology that is bi-directional links between each possible node. a. Star b. Mesh c. Bus d. Ring

Last Answer : b. Mesh

Description : What is the name of the network topology in which there are bi-directional links between each possible node? A) Ring B) Star C) Tree D) Mesh

Last Answer : D) Mesh

Description : What is the name of the network topology in which there are bi-directional links between each possible node? A) Ring B) Star C) Tree D) Mesh

Last Answer : Mesh

Description :  _____ is a bi-directional, fully duplex communication model that uses a persistent connection between client and server. A. Request-Response B. Publish-Subscriber C. Push-Pull D. Exclusive Pair

Last Answer : D. Exclusive Pair 

Description : Are buffers safe to use with todays paints and which is a good polisher to buy?

Last Answer : Yes, buffers are safe to use with todays paints. Be advised, that with any buffer you can damage the car if it is not clean, dry, and free from any debris. A good polisher to buy is the Ultimate Detailing Machine XP by Porter Cable Car Polisher.

Description : $ Minerals such as carbonates and phosphates acts as buffers. ! Biomolecules contain only 25 elements out of the 109 known elements.

Last Answer : $ Minerals such as carbonates and phosphates acts as buffers. ! Biomolecules contain only 25 elements out of ... wrong D. If both As and R are wrong.

Description : How would buffers assist an organism's efforts to maintain homeostasis in a changing environment?

Last Answer : What is the answer ?

Description : Plasma proteins act as (A) Buffers (B) Immunoglobulins (C) Reserve proteins (D) All of these

Last Answer : Answer : D

Description : Compounds that are needed for enzymes to function properly are – (1) Steroids (2) Vitamins (3) Heavy metals (4) Buffers

Last Answer : (2) Vitamins Explanation: Vitamins are organic molecules that function in a wide variety of capacities within the body. The most prominent function of the vitamins is to serve as cofactors ( ... reactions. If an enzyme lacks the essential vitamin, it cannot perform its catalyst function properly.

Description : What is Database Buffers ?

Last Answer : Database buffers are cache in the SGA used to hold the data blocks that are read from the data segments in the database such as tables, indexes and clusters DB_BLOCK_BUFFERS parameter in INIT.ORA decides the size.

Description : Although much CO2 is carried in blood, yet blood does not become acidic, because (a) CO2 is continuously diffused through the tissues and is not allowed to accumulate (b) in CO2 transport, ... absorbed by the leucocytes (d) CO2 combines with water to form H2CO3 which is neutralised by NaCO3.

Last Answer : (b) in CO2 transport, blood buffers play an important role

Description : What is needed in order for reactions to occur at body temperatures? a. buffers b. acids c. bases d. enzymes

Last Answer : d. enzymes

Description : What prevents extremes of pH in biological systems? a. acid b. bases c. buffers d. neutrons

Last Answer : c. buffers

Description : Which one of the following statements about buffers is false? a. They work inside cells. b. They consist of a weak acid and weak base. c. They prevent pH shifts. d. They enhance chemical reactions.

Last Answer : d. They enhance chemical reactions.

Description : Which of the following statements is incorrect for Parallel Virtual Machine (PVM)? (A) The PVM Communication model provides asynchronous blocking send, asynchronous blocking receive and non-blocking receive function. ... of such messages. (D) In PVM Model, the message order is not preserved. 

Last Answer : (D) In PVM Model, the message order is not preserved.

Description : Compounds that are needed for enzymes to function properly are (1) Steroids (2) Vitamins (3) Heavy metals (4) Buffers

Last Answer : Vitamins

Description : Why do we use XRA A instruction

Last Answer : The XRA A instruction is used to clear the contents of the Accumulator and store the value 00H.

Description : What is the use of addressing modes, mention the different types

Last Answer : The various formats of specifying the operands are called addressing modes, it is used to access the operands or data. The different types are as follows • Immediate addressing • Register addressing • Direct addressing • Indirect addressing • Implicit addressing

Description : What is the use of ALE

Last Answer : The ALE is used to latch the lower order address so that it can be available in T2 and T3 and used for identifying the memory address. During T1 the ALE goes high, the latch is transparent ... is the lower order address. When ALE goes low the lower order address is latched until the next ALE.

Description : GUI stands for: a. Graphical user interface b. Graph used Intel c. Graphical use inter d. None of these

Last Answer : a. Graphical user interface

Description : Which corporation decided to use 8088 microprocessor in personal computer: a. IBM b. CRT c. PMN d. SPS

Last Answer : a. IBM

Description : The fetch-execute cycle is to use a system know as: a. Assembly line b. Pipelining c. Cache d. None of these

Last Answer : b. Pipelining

Description : What type of control pins are needed in a microprocessor to regulate traffic on the bus, in order to prevent two devices from trying to use it at the same time? a. Bus control b. Interrupts c. Bus arbitration d. Status

Last Answer : c. Bus arbitration

Description : Computer instructions written with the use of English words instead of binary machine code is called a. Mnemonics b. Symbolic code c. Gray codes d. Opcode

Last Answer : b. Symbolic code

Description : Multi user systems provided cost savings for small business because they use a single processing unit to link several a. Personal computers b. Workstations c. Dumb terminals d. Mainframes

Last Answer : c. Dumb terminals

Description : The use of spooler programs and/or …. Hardware allows personal computer operators to do the processing work at the same time a printing operation is in progress a. Registered mails b. Memory c. CPU d. Buffer

Last Answer : d. Buffer

Description : Any method for controlling access to or use of memory is known a. Memory map b. Memory protection c. Memory management d. Memory instruction

Last Answer : b. Memory protection

Description : Which of the following printers are you sure will not to use if your objective is to print on multi carbon forms? a. Daisy wheel b. Dot matrix c. Laser d. Thimble

Last Answer : c. Laser

Description : To produce high quality graphics (hardcopy) in color, you would want to use a/n a. RGB monitor b. Plotter c. Ink-jet printer d. Laser printer

Last Answer : b. Plotter

Description : Which of the following processors use RISC technology? a. 486dx b. Power PC c. 486sx d. 6340

Last Answer : b. Power PC

Description : Personal computers use a number of chips mounted on a main circuit board. What is the common name for such boards? a. Daughter board b. Motherboard c. Father board d. Breadboard

Last Answer : d. Breadboard

Description : The latest PC keyboards use a circuit that senses the movement by the change in its capacitance, a. Capacitance keyboard b. Mechanical keyboard c. Qwerty keyboard d. Dvorak keyboard

Last Answer : a. Capacitance keyboard

Description : Which statement is valid about interpreter? a. It translates one instruction at a time b. Object code is saved for future use c. Repeated interpretation is not necessary d. All of above

Last Answer : a. It translates one instruction at a time

Description : The problem of bus confect and sparse address distribution are eliminated by the use of ______ address technique: a. Fully decoding b. Half decoding c. Both a & b d. None of these

Last Answer : a. Fully decoding

Description : State the use of OF and DF flags of 8086 microprocessor.

Last Answer : Overflow Flag: This flag is set if an overflow occurs, i.e. if the result of a signed operation is large enough to be accommodated in destination register. Direction Flag: It selects either increment or decrement mode for DI &/or SI register during string instructions.

Description : Explain ALIGN & ASSUME

Last Answer : The ALIGN directive forces the assembler to align the nextsegment at an address divisible by specified divisor. The format is ALIGN number where number can be 2, 4, 8 or 16. Example ALIGN 8. The ASSUME ... the segment registers at execution time. Example ASSUME CS: code, DS: data, SS: stack

Description : What is linker

Last Answer : A linker is a program used to join together several object files into one large object file. For large programs it is more efficient to divide the large program modules into ... & debugged. When all the modules work they are linked together to form a large functioning program.

Description : What is loader

Last Answer : The loader copies the program into the computer’s main memory at load time and begins the program execution at execution time.

Description : What is assembler

Last Answer : The assembler translates the assembly language program text which is given as input to the assembler to their binary equivalents known as object code. The time required to translate the assembly code ... time. The assembler checks for syntax errors & displays them before giving the object code.

Description : How does the microprocessor differentiate between data and instruction

Last Answer : When the first m/c code of an instruction is fetched and decoded in the instruction register, the microprocessor recognizes the number of bytes required to fetch the entire ... will be considered as data & the byte after the data will be treated as the next instruction.

Description : What is Microcontroller and Microcomputer

Last Answer : Microcontroller is a device that includes microprocessor; memory and I/O signal lines on a single chip, fabricated using VLSI technology. Microcomputer is a computer that is designed using microprocessor as its CPU. It includes microprocessor, memory and I/O.

Description : Define stack and explain stack related instructions

Last Answer : The stack is a group of memory locations in the R/W memory thatis used for the temporary storage of binary information during the execution of the program. The stack related instructions are PUSH & POP

Description : Explain the different instruction formats with examples

Last Answer : The instruction set is grouped into the following formats • One byte instruction MOV C,A • Two byte instruction MVI A,39H • Three byte instruction JMP 2345H

Description : Explain LDA, STA and DAA instructions

Last Answer : LDA copies the data byte into accumulator from the memory location specified by the 16-bit address. STA copies the data byte from theaccumulator in the memory location specified by 16-bit address. DAA changes the contents of the accumulator from binary to 4-bit BCD digits.

Description : Mention the categories of instruction and give two examples for each category

Last Answer : The instructions of 8085 can be categorized into the following five • Data transfer MOV Rd,Rs STA 16-bit • Arithmetic ADD R DCR M • Logical XRI 8-bit RAR • Branching JNZ CALL 16-bit • Machine control HLT NOP