网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
In a wallet containing nickels and dimes, the ratio of nickels to dimes is 2：5. If there are 42 coins in all, what is the value of the dimes?
A
$1. 20
B
$3. 00
C
$1. 50
D
75€
E
30€
参考答案
参考解析
解析：
Let 2x the number of nickels and 5x the number of dimes, then 2x+5x=42, so x=6. There are 30 dimes, worth $3.00.
Let 2x the number of nickels and 5x the number of dimes, then 2x+5x=42, so x=6. There are 30 dimes, worth $3.00.
更多 “单选题In a wallet containing nickels and dimes, the ratio of nickels to dimes is 2：5. If there are 42 coins in all, what is the value of the dimes?A $1. 20B $3. 00C $1. 50D 75€E 30€” 相关考题
考题
He dropped the pennies _______ the two dimes I had hidden in my hand.
A.out withB.inC.in withD.with
考题
以下程序的运行结果为:1. public class Conditional {2. public static void main(String args [] ) {3. int x = 4;4. System.out.println( "value is " ＋((x >4、? 99.99 : 9));5. }6. }
A. 输出：value is 99.99B. 输出: value is 9C. 输出: value is 9.0D. 在第4行出现编译错误
考题
我国钢期货的交割月份为（ ）。A. 1. 3. 5. 7. 8. 9. 11. 12月
B. 1. 3. 4. 5. 6. 7. 8. 9. 10. 11月
C. 1. 3. 5. 7. 9. 11月
D. 1—12月
考题
1. public class SimpleCalc { 2. public int value； 3. public void calculate（） { value += 7； } 4. } And： 1. public class MultiCalc extends SimpleCalc { 2. public void calculate（） { value -= 3； } 3. public void calculate（int multiplier） { 4. calculate（）； 5. super.calculate（）； 6. value *=multiplier； 7. } 8. public static void main（String[] args） { 9. MultiCalc calculator = new MultiCalc（）； 10. calculator.calculate（2）； 11. System.out.println（”Value is： “+ calculator.value）； 12. } 13. } What is the result？（） A、 Value is： 8B、 Compilation fails.C、 Value is： 12D、 Value is： -12E、 The code runs with no output.F、 An exception is thrown at runtime.
考题
1. public interface A { 2. public void doSomething（String thing）； 3. } 1. public class AImpl implements A { 2. public void doSomething（String msg） { } 3. } 1. public class B { 2. public A doit（） { 3. // more code here 4. } 5. 6. public String execute（） { 7. // more code here 8. } 9. } 1. public class C extends B { 2. public AImpl doit（） { 3. // more code here 4. } 5. 6. public Object execute（） { 7. // more code here 8. } 9. } Which statement is true about the classes and interfaces in the exhibit？（） A、 Compilation will succeed for all classes and interfaces.B、 Compilation of class C will fail because of an error in line 2.C、 Compilation of class C will fail because of an error in line 6.D、 Compilation of class AImpl will fail because of an error in line 2.
考题
1. public class Test { 2. public static void main （String args） { 3. unsigned byte b = 0； 4. b--； 5. 6. } 7. } What is the value of b at line 5？（） A、 -1B、 255C、 127D、 Compilation will fail.E、 Compilation will succeed but the program will throw an exception at line 4.
考题
常见的网上购物流程是（）。A、1.查找商品2.提交订单3.放入购物车4.查看订单状态5.收货确认B、1.查找商品2.提交订单3.查看订单状态4.放入购物车5.收货确认C、1.查找商品2.放入购物车3.提交订单4.查看订单状态5.收货确认D、1.查找商品2.放入购物车3.提交订单4.收货确认5.查看订单状态
考题
1. public class returnIt （ 2. returnType methodA（byte x， double y） （ 3. return （short） x/y * 2； 4. ） 5. ） What is the valid returnType for methodA in line 2？（） A、 IntB、 ByteC、 LongD、 ShortE、 FloatF、 Double
考题
Given： 1.% int[] nums = {42，420，4200}； 2.request.setAttribute（"foo"， nums）； % 3.${5 + 3 lt 6} 4.${requestScope[’foo’][0] ne 10 div 0} 5. ${10 div 0} What is the result？（）A、True trueB、False trueC、False true 0D、True true InfinityE、False true Infinity
考题
1. public class ReturnIt { 2. return Type methodA（byte x， double y） { 3. return （short）x / y * 2； 4. } 5. } What is the narrowest valid returnType for methodA in line2？（） A、 intB、 byteC、 longD、 shortE、 floatF、 double
考题
1. public class test （ 2. public static void main（string args[]） { 3. int 1= 0； 4. while （i） { 5. if （i==4） { 6. break； 7. } 8. ++i； 9. } 10. 11. } 12. ） What is the value of i at line 10？（）A、 0B、 3C、 4D、 5E、 The code will not compile.
考题
单选题1. public interface A { 2. public void doSomething（String thing）； 3. } 1. public class AImpl implements A { 2. public void doSomething（String msg） { } 3. } 1. public class B { 2. public A doit（） { 3. // more code here 4. } 5. 6. public String execute（） { 7. // more code here 8. } 9. } 1. public class C extends B { 2. public AImpl doit（） { 3. // more code here 4. } 5. 6. public Object execute（） { 7. // more code here 8. } 9. } Which statement is true about the classes and interfaces in the exhibit？（）A
Compilation will succeed for all classes and interfaces.B
Compilation of class C will fail because of an error in line 2.C
Compilation of class C will fail because of an error in line 6.D
Compilation of class AImpl will fail because of an error in line 2.
考题
问答题If there are only red, blue, and green marbles in a jar, what is the ratio of red to blue marbles? (1) The ratio of red to green marbles is 2:3. (2) The ratio of green to blue marbles is 6:5.
考题
单选题1. public class Test { 2. public static void main （String args） { 3. unsigned byte b = 0； 4. b--； 5. 6. } 7. } What is the value of b at line 5？（）A
-1B
255C
127D
Compilation will fail.E
Compilation will succeed but the program will throw an exception at line 4.
考题
单选题Case 1： 1. Shut down the database and perform a backup. 2. Restore all the data files. 3. Mount the database. 4. Recover the database. 5. Without applying all the redo log files， open the database using the RESETLOGS option. 6. Back up the database. Case 2： 1. Shut down the database and perform a backup. 2. Restore only the data files of the tablespace where user error damaged the data. 3. Mount the database. 4. Recover the database. 5. Open the database with the RESETLOGS option. 6. Back up the database. Case 3： 1. Shut down the database. 2. Restore the data files. 3. Open the database. 4. Perform recovery to the current point in time. Which case has the correct steps for an incomplete recovery？（）A
Only case 1B
Only case 2C
Only case 3D
Case 1 and 2E
Case 2 and 3F
Case 1 and 3G
All cases， case 1， case 2， case 3
考题
问答题A jar contains 30 coins, of which 20 are nickels and 10 are dimes. If 7 coins are removed, how many nickels are left? (1) More nickels are removed than dimes. (2) The remaining coins in the jar are worth $1.55.
考题
单选题1. public class returnIt （ 2. returnType methodA（byte x， double y） （ 3. return （short） x/y * 2； 4. ） 5. ） What is the valid returnType for methodA in line 2？（）A
IntB
ByteC
LongD
ShortE
FloatF
Double
考题
单选题1. public class test （ 2. public static void main（string args[]） { 3. int 1= 0； 4. while （i） { 5. if （i==4） { 6. break； 7. } 8. ++i； 9. } 10. 11. } 12. ） What is the value of i at line 10？（）A
0B
3C
4D
5E
The code will not compile.
考题
单选题1. public class SimpleCalc { 2. public int value； 3. public void calculate（） { value += 7； } 4. } And： 1. public class MultiCalc extends SimpleCalc { 2. public void calculate（） { value -= 3； } 3. public void calculate（int multiplier） { 4. calculate（）； 5. super.calculate（）； 6. value *=multiplier； 7. } 8. public static void main（String[] args） { 9. MultiCalc calculator = new MultiCalc（）； 10. calculator.calculate（2）； 11. System.out.println（”Value is： “+ calculator.value）； 12. } 13. } What is the result？（）A
Value is： 8B
Compilation fails.C
Value is： 12D
Value is： -12E
The code runs with no output.F
An exception is thrown at runtime.
考题
单选题1. public class ReturnIt { 2. return Type methodA（byte x， double y） { 3. return （short）x / y * 2； 4. } 5. } What is the narrowest valid returnType for methodA in line2？（）A
intB
byteC
longD
shortE
floatF
double
考题
单选题In a class of 160 seniors, the ratio of boys to girls is 3 to 5. In the junior class, the ratio of boys to girls is 3 to 2. When the two classes are combined, the ratio of boys to girls is 1 to 1. How many students are in the junior class?A
400B
360C
200D
180E
160
考题
单选题Phil has x quarters, y dimes, and z nickels and nothing else. Which of the following expressions represents the amount of money that Phil has, in dollars?A
0.25x + 0.10y + 0.05zB
2.5x + 1. 0y + 0.5zC
25x + 10y + 5zD
0.25x + 0.10y + 0.5zE
25x + 10y + 50z
考题
填空题Let f(x) be defined as the absolute value of the difference between the smallest and largest odd factors of x greater than 1. For example, f(42)＝︱3-21︱＝18. What is the value of f(90)?____
考题
单选题In a wallet containing nickels and dimes, the ratio of nickels to dimes is 2：5. If there are 42 coins in all, what is the value of the dimes?A
$1. 20B
$3. 00C
$1. 50D
75€E
30€
热门标签
最新试卷