81) Which of the following statements is correct? (2 Points)
3 m6 w, K: r l, a2 C2 S A)The definition phase results in the Software Requirements Specification.
$ z5 J j* H5 y% r/ f B)Testing is optional in software life cycle.+ _: _2 t d3 j- u9 _
C)CASE tools can only aid in the design phase of a software life cycle.* Q0 F9 N: ^/ p2 r0 l a
D)A change during a later phase does not require the documentation of all earlier- z5 M/ d. O3 j
phases to be updated.* P# Y; s L8 A. \0 x8 K: Z
(82)Black-box and white-box testing method are often used in software testing phase,in
0 B# G& Y; r: f. p% p which,the white-box is mainly used to test software's" Z% y! m3 U- J2 Y
A)reasonableness of structure B)correctness of a program# G5 z# j) a! e) q
C)external function of a program D)internal logic of a program) ?; E% A& ~. ]6 r3 X/ @1 T4 B
(83) How does Booth's Algorithm improve binary multiplication?8 N N. |* w: T/ n2 }
A) It prevents overflow. B) It prevents underflow.6 \/ f) K; M- d O& u+ `3 v
C) It preserves the sign of the multiplication operation.
% r/ R' }3 }* I* R" f D) It enhances the speed of the operation significantly.
' ]: R0 i E& F! T6 e (84) A cache has 64 blocks; each block is 16 bytes.Which block does byte 1200 map to ?" |2 w! f I6 B9 c& E3 o/ r
A) 25 B) 60 C) 75 D)100
/ K$ j8 F2 K" V/ ^- c$ C (85) Which is NOT a characteristic of an RISC processor?
; u& p1 ?/ y4 `! O$ [0 g4 l [ A) a high clock speed2 H/ l/ @( _+ [
B) a highly optimized pipeline! W9 i$ h% J+ b* F
C) a few general-purpose registers' g# ?( {0 ?0 m& w" R% s+ A
D) a limited amount of small instructions( \8 W9 r# v( l; [5 A0 T1 ^: B
(86)You are performing two sums: the first is a sum of two scalar variables and the second is a matrix sum of a pair of two-dimensional arrays-size 1000 by 1000. What" }+ @, X! A4 W2 K) r1 G; d7 o8 O
speedup is achieved when the calculations are performed on size 1000 processors?
) V4 U2 O' Y4 \9 J7 w5 [ O (2 Points)2 k; y; L+ Y: _( d( v9 w' Q* R
A) 50 B) 100 C) 999 D) none of the above
% w6 s( z- v. l (87)According to Shannon's equation,what is the channel capacity of an analog voice-grade/ [. l- u9 ]: H# {
phone line with a bandwidth of 3100 Hz and a signal-to-noise ratio or 30dB?(2 Points)$ W1 H2 n! y/ C$ F5 ~
A) 9.1 Kbps B) 9.3 Kbps C) 30.9 Kbps D) 30.17 Kbps/ }1 Y! b4 y% v. h4 J" S6 s
(88)The X.25 standard specifies three layers of functionality. Which layers of the OSI6 m. z; \' ^1 w
model correspond to the X.25 layers?, ?& F7 A8 Q/ y5 }2 ^) n
A) th e Physical,Network,and Session Layers, c4 F" X1 O6 S( U. t1 Q( k+ V% j8 U
B) the Physical,Data Link,and Network Layers
7 C' N: j1 j" `! l% e9 n. o C) the Physical,Data Link,and Transport Layers
- ]1 O7 P) l# l/ O% X2 r D) the Physical,Session,and Presentation layers
+ g+ `' i7 g' o (89)Which routing algorithm is described below?' I' [7 |( d( P* i1 Z, ^
It is a mechanism in which the setding station determines the route the frame
! N8 j* E* C0 \8 _ will follow and includes the routing information with the frame; bridges read the, d; ^, k( D9 D, j) }% {$ i
routing information to determine if they should forward the frame.
) r( K2 }) q7 Z A) Fixed Routing B) Spanning Tree' b5 b- S6 x- P# ?
C) Source Routing D) Frame Forwarding
( L- N5 W: A. q (90) Which OSI layer does a bridge operate at?
# C; S6 T2 ]: p5 X( k A) the Physical Layer B) the Network Layer9 t8 M0 E2 s _6 U. B E
C) the Transport Layer D) the Data Link Layer |
发表于 2012-7-31 20:48:14
