81) Which of the following statements is correct? (2 Points)$ R: J" g {1 {8 x3 l) W; l: s
A)The definition phase results in the Software Requirements Specification.
- Q0 X( ^1 \! a7 G2 Z$ f8 `- D B)Testing is optional in software life cycle.( D; F+ o" [8 {; n$ Z# B$ y& m! w
C)CASE tools can only aid in the design phase of a software life cycle.* l6 ^/ V5 n* Q: m5 d4 w
D)A change during a later phase does not require the documentation of all earlier; Q& ?0 [% ~* I# z: L1 Y9 F
phases to be updated.7 [$ c* c( W7 ^" q# Q& i6 C
(82)Black-box and white-box testing method are often used in software testing phase,in
- E1 U: M W+ w1 g3 E; b6 K7 l which,the white-box is mainly used to test software's
1 Y- Q3 |: }6 ]7 n' h4 U A)reasonableness of structure B)correctness of a program- ~" ^7 Y2 l- ~( t
C)external function of a program D)internal logic of a program5 B- I- |% m, Y; {3 W8 ~
(83) How does Booth's Algorithm improve binary multiplication?
3 t, l: z b0 U+ s# ]+ _# f i A) It prevents overflow. B) It prevents underflow.
9 v- D6 J2 s5 j% V4 L C) It preserves the sign of the multiplication operation.
7 s% |8 F7 G7 S) |2 m5 C/ [& \ D) It enhances the speed of the operation significantly.
" G1 s8 s8 E) I$ }0 ^# a7 [6 j* M (84) A cache has 64 blocks; each block is 16 bytes.Which block does byte 1200 map to ?# R1 Z! H, x# f
A) 25 B) 60 C) 75 D)100
9 W$ g4 l. U5 `$ c+ c1 a (85) Which is NOT a characteristic of an RISC processor?
/ @, Q$ x& Q4 H/ x4 O A) a high clock speed
: w5 W3 c6 Z! E B) a highly optimized pipeline% r+ r% L, M' |+ k
C) a few general-purpose registers
7 v8 \* v, S5 I3 v n: J D) a limited amount of small instructions
9 }, D. Y9 F: s+ B: q" A% U% D; X (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. What0 D2 L- h4 x6 {# r* W, n
speedup is achieved when the calculations are performed on size 1000 processors?( J8 ^; |9 _ U( C" k
(2 Points)
3 x3 M/ U% o! ]2 U, m$ ?( D K A) 50 B) 100 C) 999 D) none of the above9 `+ j% b+ N7 T7 K
(87)According to Shannon's equation,what is the channel capacity of an analog voice-grade
& X' Z: ~: b4 g* f! U Q& ]: ^ phone line with a bandwidth of 3100 Hz and a signal-to-noise ratio or 30dB?(2 Points)7 r2 v4 B' Z5 n& B" `
A) 9.1 Kbps B) 9.3 Kbps C) 30.9 Kbps D) 30.17 Kbps5 w- h1 L, z8 \7 R
(88)The X.25 standard specifies three layers of functionality. Which layers of the OSI
% W# J' r* T5 x p8 ?3 C model correspond to the X.25 layers?* n" v5 n+ r& h- h- ^ F; }/ j) J
A) th e Physical,Network,and Session Layers
9 {8 n4 V [% V; q t: E% _2 G B) the Physical,Data Link,and Network Layers3 b% O+ Y7 B; N( j1 z" E: L a
C) the Physical,Data Link,and Transport Layers
' P2 I C5 C6 I" ]' r P- l D) the Physical,Session,and Presentation layers
8 L3 E3 X' @% l" f1 i( A (89)Which routing algorithm is described below?/ f$ @; z6 u! E" ~4 P% e) h V
It is a mechanism in which the setding station determines the route the frame
{% T; L5 U! A) q0 ] will follow and includes the routing information with the frame; bridges read the
, q" l# @. O5 A9 c$ [9 e% R, S routing information to determine if they should forward the frame.
6 p9 N$ ~' H/ H( @1 U* y A) Fixed Routing B) Spanning Tree
0 w( e: L8 [& l C) Source Routing D) Frame Forwarding& }- {" L- X5 ]* w1 A
(90) Which OSI layer does a bridge operate at?
2 ]3 y) v, u$ y8 L! D A) the Physical Layer B) the Network Layer5 W; o f: C1 N
C) the Transport Layer D) the Data Link Layer |
发表于 2012-7-31 20:48:14
