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軟件設(shè)計師每日一練試題內(nèi)容(2021/11/5)
試題1: 某軟件項目的活動圖如下圖所示,其中頂點表示項目里程碑,連接頂點的邊表示包含的活動,邊上的數(shù)字表示相應(yīng)活動的持續(xù)時間(天),則完成該項目的最少時間為( )天?;顒?BC 和 BF 最多可以晚開始( )天而不會影響整個項目的進度。
17:
A.11
B.1 5
C.16
D.18
18:
A.0 和 7
B.0 和 11
C.2 和 11
D.2 和 11
以下關(guān)于圖的遍歷的敘述中,正確的是( )。
A.圖的遍歷是從給定的源點出發(fā)對每一個頂點僅訪問一次的過程
B.圖的深度優(yōu)先遍歷方法不適用于無向圖
C.使用隊列對圖進行廣度優(yōu)先遍歷
D.圖中有回路時則無法進行遍歷
ISO/IEC 9126 軟件質(zhì)量模型中,可靠性質(zhì)特性包括多個子特性,一軟件在故障發(fā)生后,要求在 90 秒內(nèi)恢復(fù)其性能和受影響的數(shù)據(jù),與達到此目的有關(guān)的軟件屬性為( )
A、容錯性
B、成熟性
C、易恢復(fù)性
D、易操作性
某計算機系統(tǒng)中有一個CPU、一臺輸入設(shè)備和一臺輸出設(shè)備,假設(shè)系統(tǒng)中有3個作業(yè)T1、T2和T3,系統(tǒng)采用優(yōu)先級調(diào)度,且T1的優(yōu)先級>T2的優(yōu)先級>T3的優(yōu)先級。若每個作業(yè)具有3個程序段:輸入Ii、計算Ci和輸出Pi(i=1,2,3),執(zhí)行順序為Ii、Ci、Pi,則這3個作業(yè)各程序段并發(fā)執(zhí)行的前驅(qū)圖如圖1-2所示。圖中①、②分別為(1),③、④分別為(2),⑤、⑥分別為(3)。
(1) A.I2、C2
B.I2、I3
C.C1、P3
D.C2、P2
(2) A.C1、C2
B.I2、C1
C.I3、P3
D.C1、P2
(3) A.I2、C2
B.I2、C1
C.P2、P3
D.C1、P2
In a world where it seems we already have too much to do, and too many things to think about, it seems the last thing we need is something new that we have to learn.
But use cases do solve a problem with requirements: with (1 ) declarative requirements it's hard to describle steps and sequences of events.
Use cases, stated simply, allow description of sequences of events that, taken together, lead to a system doing something useful. As simple as this sounds, this is important. When confronted only with a pile of requiements, it's often(2 )to make sense of what the authors of the requirements really wanted the system to do. In the preceding example, use cases reduce the ambiguity of the requirements by specifying exactly when and under what conditions certain behavior occurs; as such, the sequence of the behaviors can be regarded as a requirement. Use cases are particularly well suited to capture approaches. Although this may sound simple, the fact is that (3 ) requirement capture approaches, with their emphasis on declarative requirements and "shall" statements, completely fail to capture fail to capture the (4 ) of the system's behavior. Use cases are a simple yet powerful way to express the behavior of the system in way that all stakeholders can easily understand.
But, like anything, use cases come with their own problems, and as useful as they are, they can be (5 ). The result is something that is as bad, if not worse, that the original problem. Therein it's important to utilize use cases effectively without creating a greater problem than the one you started with.
(1)A.plenty
B.loose
C.extra
D.strict
(2)A.impossible
B.possible
C.sensible
D.practical
(3)A.modern
B.conventional
C.different
D.formal
(4)A.statics
B.nature
C.dynamics
D.originals
(5)A.misapplied
B.applied
C.used
D.powerful
超文本是一種信息管理技術(shù),其組織形式以( )作為基本單位。
A、文本(Text)
B、節(jié)點(Node)
C、鏈(Link)
D、環(huán)球網(wǎng)(Web)
設(shè)棧S和隊列Q的初始狀態(tài)為空,元素abcde依次進入棧S,要求每個元素出棧后立即進人隊列Q,若7個元素出隊的順序是bdfecag,則棧S的容量至少應(yīng)該是( )
A.5
B.4
C.3
D.2
高級語言源程序的編譯過程分若干個階段,分配寄存器屬于 ( ) 階段的工作。
A、詞法分析
B、語法分析
C、語義分析
D、代碼生成
在下列算法設(shè)計方法中,(1)在求解問題的過程中并不從整體最優(yōu)上加以考慮,而是做出在當前看來是最好的選擇。利用該設(shè)計方法可以解決 (2)問題。
(1)A、分治法
B、貪心法
C、動態(tài)規(guī)劃方法
D、回溯法
(2)A、排序
B、檢索
C、背包
D、0/1背包
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