Computer System Architecture Set 23

Questions 221 to 230

221.	The outputs of sequential circuits are functions of (a)  External inputs      (b)  Present state of flip-flops (c)  Next state of the flip-flop                            (d)  External outputs   (e)  Logic gates.
222.	In which type of flip-flop the intermediate condition of the SR flip-flop(When S=R=1) is eliminated? (a)  Edge-triggered flip-flop                                (b)  JK flip-flop             (c)  D flip-flop (d)  S flip-flop                                                        (e)  T flip-flop.
223.	How many flip-flops make up a register of 8 bits? (a)  6                               (b)  7                               (c)  8                               (d)  16                             (e)  32.
224.	What is the maximum count achieved by a counter with four flip-flops? (a)  10                             (b)  15                             (c)  9                               (d)  16                             (e)  8.
225.	Given the characteristic table of a JK flip-flop. Find the missing output value J K Q(t +1) 0 0 Q(t) 0 1 0 1 0 1 1 1 --- (a)  Q(t)                          (b)  Q’(t + 1)                  (c)  1                               (d)  Q’(t)                         (e)  0.
226.	Which of the following digital circuit is called a data selector? (a)  Multiplexer                                                     (b)  De-multiplexer       (c)  Half-adder (d)  Full-adder                                                       (e)  Decoder.
227.	Information transfer from one register to another in designated in symbolic form by means of a _________ (a)  Control functions                                          (b)  OP-Code                                                         (c)  Registers (d)  Stack operation                                             (e)  Replacement operator.
228.	The control condition is terminated with a ______. (a)  Comma                  (b)  Semicolon              (c)  Colon                       (d)  Hash                        (e)  Dot.
229.	______ is the address of the operand in a computation-type instruction or the target address in a branch type instruction. (a)  Indirect address                                             (b)  Effective address                  (c)  Branch address (d)  Return address                                               (e)  Direct address.
230.	Stack is a _________list. (a)  FIFO                        (b)  LIFO                        (c)  FILO                        (d)  OFLI                        (e)  LFIO.

Answers

221.	Answer :   (b) Reason :   The present state of a flip-flop is generally the outputs of a sequential circuit.
222.	Answer :   (b) Reason :   In RS flip-flop two new connections from Q and Q’  back to original input gates eliminate    the intermediate condition.
223.	Answer :   (c) Reason :   8 flip-flops require to make up a register of  8 bits.
224.	Answer :   (b) Reason :
225.	Answer :   (d) Reason :   15 is the maximum count achieved by the counter with 4 flip-flops.
226.	Answer :   (a) Reason :   Complement state of Q( t )
227.	Answer :   (e) Reason :   A replacement operator consist of the information transfer from one register to another is designated in symbolic form
228.	Answer :   (c) Reason :   The control condition is terminated with a colon
229.	Answer :   (b) Reason :   Effective address is the address of the operand in a computation-type instruction or the target address in a branch type instruction.
230.	Answer :   (b) Reason :   The Stack is opened only one end. The operation of a Stack is Last In First Out.

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