De thi - Đáp án Tin 8 ky II

   Năm học 2010 – 2011 Môn: tin học 8 (thời gian: 45 phút) I !"#$%"&'&()*+",#$ &/-0",("12& 34*5",6(4 điểm) 7896 Lệnh lặp nào sau đây là đúng? A. For <biến đếm>= <giá trị đầu> to <giá trị cuối> do <câu lệnh>; B. For <biến đếm>:= <giá trị đầu> to <giá trị cuối> do <câu lệnh>; C. For <biến đếm>:= <giá trị cuối> to <giá trị đầu> do <câu lệnh>; D. For <biến đếm>: <giá trị đầu> to <câu lệnh> do <giá trị cuối>; 78:6 Vòng lặp While <Điều kiện> do <Câu lệnh>; là vòng lặp: A. Chưa biết trước số lần lặp B. Biết trước số lần lặp C. Biết trước số lần lặp nhưng giới hạn là <=100. D. Biết trước số lần lặp nhưng giới hạn là >=100 78;6<=#>2)?8* @"&-0",#$>"A!8*7=B i:=1; j:=2; k:=3; While i<=6 do i:=i+1; j:=j+1; k:=k+j; Space:=’ ’; Write(I,space,j,space,k); !8C)#D&)E"* @"&-0",#$>"#$F"G3E"H$)#13")"$!24">",)(#$I&J! )GKGC3L"3-M#34N! ")F8O B:G;GP QBRG:G; BRG;GS BSG;GR 78P6 Sau khi thực hiện đoạn chương trình sau, giá trị của biến S bằng bao nhiêu: A6T9U V $)6T9# WX A6TAY)U A.120 B. 55 C. 121 D. 151 78W6L"#7"&-0",#$>"NZ#*L8N[",#\C]!66 A.End. B.Begin. C.Uses. D.Var. 78S6 Cú pháp khai báo biến 2^", trong Pascal là: A._!$ <Tên mảng> ;!$$!=[<chỉ số đầu> <chỉ số cuối>] V <kiểu dữ liệu >; B. _!$ <Tên mảng> : !$$!= [<chỉ số đầu>…<chỉ số cuối>] V <kiểu dữ liệu >; C. _!$ <Tên mảng> : !$$!= [<chỉ số đầu> <chỉ số cuối>] V <kiểu dữ liệu >; D._!$ <Tên mảng> : !$$!= [<chỉ số đầu>…<chỉ số cuối>] V $ <kiểu dữ liệu >; 78R6?#`"#a",T:bPbScb"U12&d"* @"3E"6 A.For i:=1 to n do if ( i mod 2)=0 then S:=S + i; C.For i:=1 to n do S:= S + i ; B. For i:=1 to n do if ( i mod 2)=1 then S:=S + i; D.for i:=1 to n do if ( i mod 2)<>0 then S:=S + i; 78e6 Chọn khai báo hợp lệ: A. Var a,b: array[1 n] of real; C. Var a,b: array[1 : n] of Integer; B. Var a,b: array[1 100] of real; D. Var a,b: array[1 … 100] of real; )f"g_4 &(&hA! & /iM/_4,)^)#`&_>A! 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O(1 điểm) / @&&7"X )"'",&783E"12& 34A!)$k)_)l#3@)&783E"*]& *5",6(2 điểm) $ ,$!2)"# ",U ccccccccccccccccccc cccccccccccccccBB mA1A&$#  ccccccccccccccccccc cccccccccccccccBBB n!$B)6"#1,1$U ccccccccccccccccccc cccccccccccccccBB 6 ",)"#U Q1,)" 3$A&$U ccccccccccccccccccc ccccccccccBBB H$)#1op!/_! A TqrU1!X3"orU 6TsU t $)6T9# X TY9)  U ccccccccccccccccccc cccccccccccccccc H$)#13"op ",&8!qGGqA X!8#)1"ATpGAr 1!X3" ccccccccccccccccccc cccccccccccccccc BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB mA1A&$#U Var N, i: Integer; BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB t $)6T9# X 6TY9)U H$)#13"op ",&8!qGGqA X!8#)1"ATpGArU u"XB nn)l#&-0",#$>",)^)v8=l#N4)# ("6(2 điểm) Program Tong; Uses crt; Var S: real; n, i: integer; Begin Clrscr; Write(‘Nhap so n = ‘); Readln(n); S:= 0; For i:= 1 to n do S: = S + i; 78 5", !) )^)#`& a) V $ i=1 to 10 X writeln('A'); g Thiếu dấu : sau biến i b)_!$X: $$!=[5 10] VCharU g Kiu d liu sai. c) X:=10; j)31 X=10 X X := X+5; g d) )V x>5 #1" a:=b; 13A1 m := n; g Thừa dấu ; trước else Writeln(‘Tong can tim la: ‘, S:6:2); Readln End. )( _)F"$!*f @2I8=l# )( _)F"/^"N)E" $L"I !" . >=100  78 ;6<=#>2) ?8 * @"& -0 ",#$>"A !8 *7=B i:=1; j:=2; k:=3; While i<=6 do i:=i+1; j:=j+1; k:=k+j; Space:=’ ’; Write(I,space,j,space,k);  !8 C)#D&)E"*. học 2010 – 2011 Môn: tin học 8 (thời gian: 45 phút) I !"#$%"&'&()*+",#$ &/ -0 ",("12& 34*5",6(4 điểm)  78 96 Lệnh lặp nào sau. @"& -0 ",#$>"#$F"G3E"H$)#13")"$!24">",)(#$I&J! )GKGC3L"3-M#34N! ")F8O B:G;GP QBRG:G; BRG;GS BSG;GR  78 P6