Question

20. A __________________ is a combinational circuit that is useful in selecting a

      memory location according to a binary value that is placed on the address lines of a

      memory bus.

      A). multiplexer

      B). gate

      C). transistor

      D). decoder

21. A _______________ is a combinational circuit that selects a single output from

      multiple inputs.

      A). decoder

      B). multiplexer

      C). AND gate

      D). OR gate

22. ___________________ creates logic diagrams using the values specified in a truth

      table.

      A). Digital synthesis

      B). Digital analysis

      C). Circuit design

      D). An Embedded system

23. The two principal parts of the CPU are the _____________ and the ____________.

      A). memory bus, arithmetic logic unit

      B). memory bus, registers

      C). datapath, control unit

      D). datapath, arithmetic logic unit

24. A ___________ allows the CPU to share data with other system components.

      A). logic bus

      B). memory bus

      C). system bus

      D). data bus

25. System bottlenecks can arise from the use of a ___________________________ bus

      arbitration scheme when a centralized arbiter selects which process gets the bus.

      A). centralized parallel arbitration

      B). distributed arbitration using self-selection

      C). daisy chain arbitration

      D). distributed arbitration using collision detection

26. Under which of the following scenarios can CPU throughput be improved?

      A). Reducing the number of instructions in a program.

      B). Reducing the number of clock cycles per instruction.

      C). Reducing the number of nanoseconds per clock cycle.

      D). All of the above.

27. ___________ are all input devices which allow us to enter data into a computer.

      A). monitors, printers, speakers

      B). keyboards, mice, scanners

      C). keyboards, printers, plotters

      D). printers, mice, touch screens

28. When the normal execution of a program is altered because an event of higher

      priority occurs, the CPU is alerted to such an event through a(n) ________________.

      A). bottleneck

      B). interrupt

      C). latency condition

      D). abend

29. The ____________________________ of a computer specifies the instructions that

      the computer can perform and the format for each instruction.

      A). instruction set architecture

      B). registers and buses

      C). opcodes

      D). clock cycles

30. Interrupts that cannot be suspended but must be processed in order to keep the system

      in a stable condition are called __________________ interrupts.

      A). detectable

      B). forseeable

      C). maskable

      D). nonmaskable

Section B: True or False Questions

      Each of the following questions is either True or False. Place a T (True) if the answer is True on the answer sheet beside the question; otherwise place a F (False) if the answer is False on the answer sheet beside the question.

31. The job of an assembler is to convert assembly language into machine language.

      T                                        F

32. The arithmetic logic unit is responsible for decoding the binary value in an instruction

       register and creating all necessary control signals needed to execute the appropriate

       microoperation.

      T                                       F

33. To support the passing of parameters between programs, a stack data structure is
       used.

      T                                       F

34. A systems architecture that is backward compatible permits programs written on a

      newer, faster processor to run just as fast on a less powerful and older processor.

      T                                        F

35. There are 2³⁰ megabytes in a terabyte.

      T                                        F

36. The decimal (base 10) number 210 is equivalent to 11010010 in binary (base 2) and

      D5 in hexadecimal (base 16).

      T                                        F

37. The hexadecimal number C9D is equivalent to the binary number 110010011101.

      T                                        F

38. A program counter points to the memory address of the instruction that the CPU is

      currently executing.

     T                                        F

39. While statements and if statements are examples of conditional branching

       instructions.

      T                                        F

40. Obtaining the binary equivalent of a decimal (base 10) integer with a negative sign

      requires a bitwise complement of the bits in the positive decimal (base 10) integer

      value of the same magnitude.

      T                                        F

Answer 1

20- d)decoder. -

Binary Decoder help in decoding the binary input . so if we put n bit binary adderss on the input address line it will select one decimal value from 2^n ouptut address,

21)- b)multiplexer -

It selects a single output from multiple input using the combination of select line

22- A)digital synthesis.

Digital synthesis creates logic diagrams using the values specified in a truth table, digital analysis is used find the relationship between input and output,digital design helps for physical form of a circut, while embeded system also used in desiginig instrumnet.

23) c)datapath,control unit.

The principla component of cpu is ALU and control Unit. Datapath consist ALU.

24) D) data bus.

data buscarries the data between the processor and other components .

25) A) centralized parallal arbitation .

Bottlenecks can result using this type of arbitration as, each device has a request control line to the bus and a centralized arbiter selects who gets the bus.

26) D) all of these.

Thought put can be increased using all the three.

27) b) keyboard,mice, scanner.

Keyboard ,mouse(mice) , scanner ,touchscreen are input devide while printer, moniter, plotter are outout device

28) B) intrerrupt.

CPU is alerted through Intrrupt, when the normal execution of a program is altered because an event of higher priority program occurs

29) C) opcode.

opcode is a instruction thatspecifies the computer what instruction can be performed and specifies the format of the instruction,

30. D) non-maskable

Maskable interrupt can be ignored while non-maskable inerrupt can't be ignored.

you have posted too many question , i answered 11,but we are asked to answer only one, so please give a like...