Quiznetik
Microprocessors and Microcontrollers | Set 2
1. The Microprocessor places address on the address bus
A. 4 bit
B. 8 bit
C. 16 bit
D. 32 bit
Correct : C. 16 bit
2. The Microprocessor places 16 bit address on the add lines from that address by register should be selected
A. address
B. one
C. two
D. three
Correct : B. one
3. The of the memory chip will identify and select the register for the EPROM
A. internal decoder
B. external decoder
C. address decoder
D. data decoder
Correct : A. internal decoder
4. Microprocessor provides signal like to indicate the read operatio
A. LOW
B. MCMW
C. MCMR
D. MCMWR
Correct : C. MCMR
5. To interface memory with the microprocessor, connect register the lines of the address bus must be added to address lines of the chip.
A. single
B. memory
C. multiple
D. triple
Correct : B. memory
6. The remaining address line of bus is decoded to generate chip select signal
A. data
B. address
C. control bus
D. both (a) and (b)
Correct : B. address
7. signal is generated by combining RD and WR signals with IO/M
A. control
B. memory
C. register
D. system
Correct : A. control
8. Memory is an integral part of a system
A. supercomputer
B. microcomputer
C. mini computer
D. mainframe computer
Correct : B. microcomputer
9. has certain signal requirements write into and read from its registers
A. memory
B. register
C. both (a) and (b)
D. control
Correct : A. memory
10. An is used to fetch one address
A. internal decoder
B. external decoder
C. encoder
D. register
Correct : A. internal decoder
11. The primary function of the is to accept data from I/P devices
A. multiprocessor
B. microprocessor
C. peripherals
D. interfaces
Correct : B. microprocessor
12. signal prevent the microprocessor from reading the same data more than one
A. pipelining
B. handshaking
C. controlling
D. signaling
Correct : B. handshaking
13. Bits in IRR interrupt are
A. reset
B. set
C. stop
D. start
Correct : B. set
14. generate interrupt signal to microprocessor and receive acknowledge
A. priority resolver
B. control logic
C. interrupt request register
D. interrupt register
Correct : B. control logic
15. The pin is used to select direct command word
A. A0
B. D7-D6
C. A12
D. AD7-AD6
Correct : A. A0
16. CS connect the output of
A. encoder
B. decoder
C. slave program
D. buffer
Correct : B. decoder
17. In which year, 8086 was introduced?
A. 1978
B. 1979
C. 1977
D. 1981
Correct : A. 1978
18. Expansion for HMOS technology_
A. high level mode oxygen semiconductor
B. high level metal oxygen semiconductor
C. high performance medium oxide semiconductor
D. high performance metal oxide semiconductor
Correct : D. high performance metal oxide semiconductor
19. 8086 and 8088 contains transistors
A. 29000
B. 24000
C. 34000
D. 54000
Correct : A. 29000
20. ALE stands for
A. address latch enable
B. address level enable
C. address leak enable
D. address leak extension
Correct : A. address latch enable
21. What is DEN?
A. direct enable
B. data entered
C. data enable
D. data encoding
Correct : C. data enable
22. In 8086, Example for Non maskable interrupts are .
A. TRAP
B. RST6.5
C. INTR
D. RST6.6
Correct : A. TRAP
23. In 8086 the overflow flag is set when .
A. the sum is more than 16 bits.
B. signed numbers go out of their range after an arithmetic operation.
C. carry and sign flags are set.
D. subtraction
Correct : B. signed numbers go out of their range after an arithmetic operation.
24. In 8086 microprocessor the following has the highest priority among all type interrupts?
A. NMI
B. DIV 0
C. TYPE 255
D. OVER FLOW
Correct : A. NMI
25. In 8086 microprocessor one of the following statements is not true?
A. coprocessor is interfaced in max mode.
B. coprocessor is interfaced in min mode.
C. I /O can be interfaced in max / min mode.
D. supports pipelining
Correct : B. coprocessor is interfaced in min mode.
26. Address line for TRAP is?
A. 0023H
B. 0024H
C. 0033H
D. 0099H
Correct : B. 0024H
27. Access time is faster for .
A. ROM
B. SRAM
C. DRAM
D. ERAM
Correct : B. SRAM
28. The First Microprocessor was .
A. Intel 4004
B. 8080
C. 8085
D. 4008
Correct : A. Intel 4004
29. Status register is also called as .
A. accumulator
B. stack
C. counter
D. flags
Correct : D. flags
30. Which of the following is not a basic element within the microprocessor?
A. Microcontroller
B. Arithmetic logic unit (ALU)
C. Register array
D. Control unit
Correct : A. Microcontroller
31. Which method bypasses the CPU for certain types of data transfer?
A. Software interrupts
B. Interrupt-driven I/O
C. Polled I/O
D. Direct memory access (DMA)
Correct : D. Direct memory access (DMA)
32. Which bus is bidirectional?
A. Address bus
B. Control bus
C. Data bus
D. None of the above
Correct : C. Data bus
33. The first microprocessor had a(n) .
A. 1 – bit data bus
B. 2 – bit data bus
C. 4 – bit data bus
D. 8 – bit data bus
Correct : C. 4 – bit data bus
34. Which microprocessor has multiplexed data and address lines?
A. 8086
B. 80286
C. 80386
D. Pentium
Correct : A. 8086
35. Which is not an operand?
A. Variable
B. Register
C. Memory location
D. Assembler
Correct : D. Assembler
36. Which is not part of the execution unit (EU)?
A. Arithmetic logic unit (ALU)
B. Clock
C. General registers
D. Flags
Correct : B. Clock
37. A 20-bit address bus can locate .
A. 1,048,576 locations
B. 2,097,152 locations
C. 4,194,304 locations
D. 8,388,608 locations
Correct : A. 1,048,576 locations
38. Which of the following is not an arithmetic instruction?
A. INC (increment)
B. CMP (compare)
C. DEC (decrement)
D. ROL (rotate left)
Correct : D. ROL (rotate left)
39. During a read operation the CPU fetches _.
A. a program instruction
B. another address
C. data itself
D. all of the above
Correct : D. all of the above
40. Which of the following is not an 8086/8088 general-purpose register?
A. Code segment (CS)
B. Data segment (DS)
C. Stack segment (SS)
D. Address segment (AS)
Correct : D. Address segment (AS)
41. A 20-bit address bus allows access to a memory of capacity
A. 1 MB
B. 2 MB
C. 4 MB
D. 8 MB
Correct : A. 1 MB
42. Which microprocessor accepts the program written for 8086 without any changes?
A. 8085
B. 8086
C. 8087
D. 8088
Correct : D. 8088
43. Which group of instructions do not affect the flags?
A. Arithmetic operations
B. Logic operations
C. Data transfer operations
D. Branch operations
Correct : C. Data transfer operations
44. The result of MOV AL, 65 is to store
A. store 0100 0010 in AL
B. store 42H in AL
C. store 40H in AL
D. store 0100 0001 in AL
Correct : D. store 0100 0001 in AL