Description : Serial port interrupt is generated, if ____ bits are set a) IE b) RI, IE c) IP, TI d) RI, TI
Last Answer : a) IE
Last Answer : d) RI, TI
Description : Serial port vector address is of _______. And causes an interrupt when ________. a) 0013H, either TI or RI flag is set b) 0023H, either TI or RI flag is reset c) 0013H, either TI or RI flag is reset d) 0023H, either TI or RI flag is set
Last Answer : a) 0013H, either TI or RI flag is set
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 : In 8051 an external interrupt 1 vector address is of ________ and causes of interrupt if ____. a) 000BH, a high to low transition on pin INT1 b) 001BH, a low to high transition on pin INT1 c) 0013H, a high to low transition on pin INT1 d) 0023H, a low to high transition on pin INT1
Last Answer : a) 000BH, a high to low transition on pin INT1
Description : In 8279, a scanned sensor matrix mode, if a sensor changes its state, the ___ line goes ____ to interrupt the CPU. a) CS, high b) A0, high c) IRQ, high d) STB, high
Last Answer : c) IRQ, high
Description : How many synchronous and asynchronous modes are there in serial port of 8096? M. Krishna Kumar/IISc. Bangalore M5/V1/June 04/1 Microprocessors and Microcontrollers/ Multiple Choice Questions Architecture of Micro ... 2, 2 respectively b) 3,1 respectively c) 1, 3 respectively d) 1, 2 respectively
Last Answer : c) 1, 3 respectively
Description : What instruction performs Compare immediate to indirect and jump if not equal. a) CJNE A, #data, rel b) CJNE Rn, #data, rel c) CJNE @ Ri, #data, rel d) CJNE A, data, rel
Last Answer : b) CJNE Rn, #data, rel
Description : Which of the following instruction perform the move accumulator to external RAM of 16bit address? a) MOV @ DPTR, A b) MOVX @ Ri, A c) MOV A, @ Ri d) MOVX @ DPTR, A
Last Answer : c) MOV A, @ Ri
Description : Which one of the following vectors is used to replace the defective gene in gene therapy? (a) Adenovirus (b) Cosmid (c) Ri plasmid (d) Ti plasmid
Last Answer : (a) Adenovirus
Description : All bits in character are sent and received ______ in serial port. A. In groups of 3 bits B. One at a time C. In groups of 2 bits D. Simultaneously
Last Answer : B. One at a time
Description : What is meant by interrupt?
Last Answer : Interrupt is an external signal that causes a microprocessor to jump to a specific subroutine.
Description : List the four instructions which control the interrupt structure of the 8085 microprocessor.
Last Answer : • DI ( Disable Interrupts ) • EI ( Enable Interrupts ) • RIM ( Read Interrupt Masks ) • SIM ( Set Interrupt Masks )
Description : The external device is connected to a pin called the ______ pin on the processor chip. a. Interrupt b. Transfer c. Both d. None of these
Last Answer : a. Interrupt
Description : Which are the flags of status register: a. Over flow flag b. Carry flag c. Half carry flag d. Zero flag e. Interrupt flag f. Negative flag g. All of these
Last Answer : g. All of these
Description : The interrupt vector table of 80386 has been allocated ______ space starting from _______ to _______. a) 1Kbyte, 00000H, 003FFH b) 2Kbyte, 10000H, 004FFH c) 3Kbyte, 01000H, 007FFH d) 4Kbyte, 01000H, 009FFH
Last Answer : c) 3Kbyte, 01000H, 007FFH
Description : In 8096 we have _____interrupt sources and _______ interrupt vectors. a) 18, 8 b) 21, 6 c) 21, 8 d) 16, 8
Last Answer : c) 21, 8
Description : In 8051 which interrupt has highest priority? a)IE1 b)TF0 c)IE0 d)TF1
Last Answer : a)IE1
Description : If ______ and ________ connections are made so that an error condition in 8087 can interrupt to the processor. a) BHE, RQ/GT1 b) BUSY, TEST c) INT, NMI d) RQ/GT0, RQ/GT1
Last Answer : c) INT, NMI
Description : 8086 is interfaced to two 8259s (Programmable interrupt controllers). If 8259s are in master slave configuration the number of interrupts available to the 8086 microprocessor is a) 8 b) 16 c) 15 d) 64
Last Answer : a) 8
Last Answer : c) 21,
Last Answer : c)IE0
Description : What is meant by Maskable interrupts? a) An interrupt which can never be turned off. b) An interrupt that can be turned off by the programmer. c) none
Last Answer : b) An interrupt that can be turned off by the programmer.
Description : RIM is used to check whether, ______ a) The write operation is done or not b) The interrupt is Masked or not c) a & b
Last Answer : b) The interrupt is Masked or not
Description : What is SIM? a) Select Interrupt Mask b) Sorting Interrupt Mask c) Set Interrupt Mask.
Last Answer : c) Set Interrupt Mask.
Description : Which interrupt is not level sensitive in 8085? a) RST6.5 is a raising edge-trigging interrupt. b) RST7.5 is a raising edge-trigging interrupt. c) a & b.
Last Answer : b) RST7.5 is a raising edge-trigging interrupt.
Description : Which interrupt has the highest priority? a) INTR b) TRAP c) RST6.5
Last Answer : c) RST6.5
Description : Ti is the time taken for the ith stage and there are n stages in the: a. Throughput b. Assembly line c. Both A and B d. None of these
Last Answer : b. Assembly line
Description : A storage device whe3re the access time is depended upon the location of the data is a. Random access b. Serial access c. Sequential access d. Transaction access
Last Answer : b. Serial access
Description : A kind of serial dot-matrix printer that forms characters with magnetically-charged ink sprayed dots is called a. Laser printer b. Ink-jet printer c. Drum printer d. Chan printer
Last Answer : d. Chan printer
Description : The system unit of a personal computer typically contains all of the following except: a. Microprocessor b. Disk controller c. Serial interface d. Modem
Last Answer : d. Modem
Description : In serial communication modes, mode 1 the Baud rate = a) BR=2SMOD/32 * (Timer 0 over flow rate) b) BR=2SMOD/16 * (Timer 1 over flow rate) c) BR=2SMOD/16 * (Timer 0 over flow rate) d) BR=2SMOD/32 * (Timer 1 over flow rate)
Last Answer : b) BR=2SMOD/16 * (Timer 1 over flow rate)
Description : Why 8087 is referred to as Coprocessor? i) Because 8087 is used in parallel with main processor in a system, rather than serving as a main processor itself. ii) Because 8087 is used in serial with main processor in a ... math computations. a) i & iii b) ii & iii c) iii only. d) i only.
Last Answer : c) iii only.
Description : A collection of 8 bits is called a. byte b. word c. record
Last Answer : a. byte
Description : A stack pointer is a. a 16-bit register in the microprocessor that indicate the beginning of the stack memory. b. a register that decodes and executes 16-bit arithmetic expression. c. The first memory location where a subroutine address is stored. d. a register in which flag bits are stored
Last Answer : a. a 16-bit register in the microprocessor that indicate the beginning of the stack memory.
Description : If the number of address bits in a memory is reduced by 2 and the addressability is doubled, the size of the memory (i.e., the number of bits stored in the memory) a. doubles b. remains unchanged c. halves d. increases by 2^(address bits)/addressability
Last Answer : c. halves
Description : A structure that stores a number of bits taken "together as a unit" is a a. gate b. mux c. decoder d. register
Last Answer : d. register
Description : Because we wish to allow each ASCII code to occupy one location in memory, most memories are _____ addressable. a. BYTE b. NIBBLE c. WORD (16 bits) d. DOUBLEWORD (32 bits)
Last Answer : a. BYTE
Description : For a memory with a 16-bit address space, the addressability is a. 16 bits b. 8 bits c. 2^16 bits d. Cannot be determined
Last Answer : d. Cannot be determined
Description : The word length of a computer is measured in a. Bytes b. Millimeters c. Meters d. Bits
Last Answer : d. Bits
Description : The original ASCII code used…bits of each byte, reserving that last bit for error checking a. 5 b. 6 c. 7 d. 8
Last Answer : c. 7
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 storage capacity of a disk system depends on the bits per inch of track and the tracks per inch of a. Cylinder b. Hum c. Cluster d. Surface
Last Answer : d. Surface
Description : If in a computer, 16 bits are used to specify address in a RAM, the number of addresses will be a. 216 b. 65,536 c. 64K d. Any of the above
Last Answer : b. 65,536
Description : A byte consists of a. One bit b. Four bits c. Eight bits d. Sixteen bits
Last Answer : c. Eight bits
Description : a computer which CPU speed around 100 million instruction per second and with the word length of around 64 bits is known as a. Super computer b. Mini computer c. Micro computer d. Macro computer
Last Answer : a. Super computer
Description : Storage capacity of magnetic disk depends on a. tracks per inch of surface b. bits per inch of tracks c. disk pack in disk surface d. All of above
Last Answer : d. All of above
Description : The processor 80386/80486 and the Pentium processor uses _____ bits address bus: a. 16 b. 32 c. 36 d. 64
Last Answer : b. 32
Description : ____is used to control the cache with two new control bits not present in the 80386 microprocessor. What are the bits used to control the 8K byte cache? a) CR0, CD, NW b) CR0, NW, PWT c) Control Register Zero, PWT, PCD d) none
Last Answer : d) none