Write an expression that evaluates to true if and only if the integer x is greater than the integer y .
So, if the value of x was 15 and the value of y was 11, then the value of your expression would be true.
On the other hand, if the value of x was 145 and the value of y was 211, then the value of your expression would be false.
ANSWER
x > y
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20522
Write an expression that evaluates to true if and only if the value of the integer variable x is equal to zero.
So if the value of x were 3 the expression would be false. Only if the value of x were 0 would the expression be true.
ANSWER
x==0
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20533
Write an expression that evaluates to true if and only if the variables profits and losses are exactly equal .
ANSWER
profits==losses
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20554
Given the char variable c , write an expression that is true if and only if the value of c is not the space character .
ANSWER
c!=' '
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20555
Write an expression that evaluates to true if the value of index is greater than the value of lastIndex .
ANSWER
index>lastIndex
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20556
Working overtime is defined as having worked more than 40 hours during the week. Given the variable hoursWorked , write an expression that evaluates to true if the employee worked overtime.
ANSWER
hoursWorked>40
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20557
Write an expression that evaluates to true if the value x is greater than or equal to y .
ANSWER
x>=y
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20558
Given the variables numberOfMen and numberOfWomen , write an expression that evaluates to true if the number of men is greater than or equal to the number of women.
ANSWER
numberOfMen>=numberOfWomen
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20559
Given a double variable called average , write an expression that is true if and only if the variable 's value is less than 60.0 .
ANSWER
average<60
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20560
Given an int variable grossPay , write an expression that evaluates to true if and only if the value of grossPay is less than 10,000 .
ANSWER
grossPay<10000
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20666
Write an expression that evaluates to true if the value of the integer variable widthOfBox is not divisible by the value of the integer variable widthOfBook . Assume that widthOfBook is not zero. ("Not divisible" means has a remainder.)
ANSWER
(widthOfBox%widthOfBook!=0)
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20667
Write an expression that evaluates to true if the integer variable x contains an evenvalue , and false if it contains an oddvalue
For instance, 4, 10, and 256 are even numbers. If x had any of these values your expression
should be true.
On the other hand, 9, 13, 121 are odd. If x had any of these values your expression should be false.
ANSWER
(x%2==0)
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20665
Write an expression that evaluates to true if the value of the integer variable numberOfPrizes is divisible (with no remainder) by the integer variable numberOfParticipants . Assume that numberOfParticipants is not zero.
ANSWER
numberOfPrizes%numberOfParticipants==0
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20922
Assume that a boolean variable workedOvertime has been declared , and that another variable , hoursWorked has been declared and initialized . Write a statement that assigns the value true to workedOvertime if hoursWorked is greater than 40 and false otherwise.
ANSWER
if
(hoursWorked>40)
workedOvertime=true;
else
workedOvertime=false;
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20921
Assume that a boolean variable isQuadrilateral has been declared , and that another variable , numberOfSides has been declared and initialized . Write a statement that assigns the value true if numberOfSides is exactly 4 and false otherwise.
ANSWER
if
(numberOfSides ==4)
isQuadrilateral = true;
else
isQuadrilateral = false;
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20561
Given that the variables x and y have already been declared and assigned values , write an expression that evaluates to true if x is non-negative and y is negative.
So, if the value of x were 4 and the value of y were -3 then the expression would be true.
On the other hand, if the value of x were 4 and the value of y were 1 then the value of the
expression would be false.
ANSWER
x >= 0 && y < 0
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20610
Given the variables temperature and humidity , write an expression that evaluates to true if and only if the temperature is greater than 90 and the humidity is less than 10 .
ANSWER
temperature>90 && humidity<10 == true
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20562
Given that the variables x and y have already been declared and assigned values , write an expression that evaluates to true if x is positive (including zero) or y is negative.
ANSWER
x>=0||y<0==true
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20613
Write an expression that evaluates to true if and only if value of the boolean variable isAMember is false .
ANSWER
isAMember==false
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20563
Given two variables , isEmpty of type boolean , indicating whether a class roster is empty or not, and numberOfCredits of type int , containing the number of credits for a class , write an expression that evaluates to true if the class roster is empty or the class is exactly three credits.
ANSWER
isEmpty || numberOfCredits == 3
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20564
Given two variables , isEmpty of type boolean , indicating whether a class roster is empty or not, and numberOfCredits of type int , containing the number of credits for a class , write an expression that evaluates to true if the class roster is not empty and the class is more than two credits.
ANSWER
!isEmpty && numberOfCredits > 2
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20565
Given two variables , isEmpty of type boolean , indicating whether a class roster is empty or not, and numberOfCredits of type integer , containing the number of credits for a class , write an expression that evaluates to true if the class roster is not empty and the class is one or three credits.
So, if the value of isEmpty were false and the value of numberOfCredits were 3 then the
expression would be true.
On the other hand, if the value of isEmpty were true or the value of numberOfCredits
were 2 then the value of the expression would be false.
ANSWER
!isEmpty && (numberOfCredits == 1 || numberOfCredits == 3)
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20611
Given the integer variables yearsWithCompany and department , write an expression that evaluates to true if yearsWithCompany is less than 5 and department is notequal to 99 .
ANSWER
yearsWithCompany < 5 && department != 99
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20612
Given the variables isFullTimeStudent and age , write an expression that evaluates to true if age is less than 19 or isFullTimeStudent is true .
ANSWER
age < 19 || isFullTimeStudent == true
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20609
Write an expression that evaluates to true if and only if the value of the boolean variable workedOvertime is true .
ANSWER
workedOvertime == true
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20944
Clunker Motors Inc. is recalling all vehicles from model years 2001-2006. A boolean variable named recalled has been declared . Given a variable modelYear write a statement that assigns true to recalled if the value of modelYear falls within the recall range and assigns false otherwise.
Do not use an if statement in this exercise!
ANSWER
recalled=(modelYear>=2001 && modelYear<=2006);
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20946
Clunker Motors Inc. is recalling all vehicles from model years 2001-2006. A boolean variable named norecall has been declared . Given a variable modelYear write a statement that assigns true to norecall if the value of modelYear does NOT within the recall range and assigns false otherwise.
Do not use an if statement in this exercise!
ANSWER
norecall=!(modelYear >= 2001 && modelYear <= 2006);
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20941
Clunker Motors Inc. is recalling all vehicles from model years 1995-1998 and 2004-2006. A boolean variable named recalled has been declared . Given a variable modelYear write a statement that assigns true to recalled if the value of modelYear falls within the two recall ranges and assigns false otherwise.
Do not use an if statement in this exercise!
ANSWER
recalled = (modelYear >= 1995 && modelYear <= 1998) || (modelYear >= 2004 && modelYear <= 2006);
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20942
Clunker Motors Inc. is recalling all vehicles from model years 1995-1998 and 2004-2006. A boolean variable named recalled has been declared . Given a variable modelYear write a statement that assigns true to norecall if the value of modelYear does NOT fall within the two recall ranges and assigns false otherwise.
Do not use an if statement in this exercise!
ANSWER
norecall=!((modelYear>=1995 && modelYear <=1998) || (modelYear>=2004 && modelYear<=2006));
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20673
Write a statement that toggles the value of onOffSwitch . That is, if onOffSwitch is false , its value is changed to true ; if onOffSwitch is true , its value is changed to false .
ANSWER
if
(onOffSwitch==false)
{
onOffSwitch=true;
}
else
{
onOffSwitch=false;
}
20772
Write a class definition of a class named 'Value ' with the following:
a constructor accepting a single integer parameter
a constructor with no parameters
a method 'setVal' that accepts a single parameter ,
a boolean method , 'wasModified' that returns true if setVal was ever called for the object .
a method 'getVal' that returns an integer value as follows: if setVal has ever been called, it getVal returns the last value passed to setVal. Otherwise if the "single int parameter " constructor was used to create the object , getVal returns the value passed to that constructor . Otherwise getVal returns 0.
ANSWER
public class Value
{
private boolean modified = false;
public int val;
public Value(int v)
{
val=v;
}
public int getVal()
{
return val;
}
public void setVal(int st)
{
val=st;
modified=true;
}
public boolean wasModified()
{
return modified;
}
}
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20614
Write a conditional that assigns the boolean value true to the variable fever if the variable temperature is greater than 98.6
So if temperature has the value 99.5, after your code executes fever would have the value true.
On the other hand, if temperature has the value 96.3, your code will not change the value of fever at all.
ANSWER
if ( temperature > 98.6 ) fever = true ;
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20615
Write a conditional that assigns 10,000 to the variable bonus if the value of the variable goodsSold is greater than 500,000 .
Clunker Motors Inc. is recalling all vehicles from model years 1995-1998 and 2004-2006. A boolean variable named recalled has been declared . Given a variable modelYear write a statement that assigns true to norecall if the value of modelYear does NOT fall within the two recall ranges and assigns false otherwise.
Do not use an if statement in this exercise!
ANSWER
norecall=!((modelYear>=1995 && modelYear <=1998) || (modelYear>=2004 && modelYear<=2006));
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20673
Write a statement that toggles the value of onOffSwitch . That is, if onOffSwitch is false , its value is changed to true ; if onOffSwitch is true , its value is changed to false .
ANSWER
if
(onOffSwitch==false)
{
onOffSwitch=true;
}
else
{
onOffSwitch=false;
}
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20756
Assign to the boolean variable 'possibleCandidate' the value false if the int variable 'n' is even and greater than 2, or if the variable 'n' is less than or equal to 0; otherwise, assign true to 'possibleCandidate'.
Assume 'possibleCandidate' and 'n' are already declared and 'n' assigned a value .
ANSWER
possibleCandidate = !(n % 2 == 0 && n > 2 || n <= 0);
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20760
Write a class definition of a class named 'Value ' with the following:
a boolean instance variable named 'modified', initialized to false
an integer instance variable named 'val'
a constructor accepting a single parameter whose value is assigned to the instance variable 'val'
a method 'getVal' that returns the current value of the instance variable 'val'
a method 'setVal' that accepts a single parameter , assigns its value to 'val', and sets the 'modified' instance variable to true , and
a boolean method , 'wasModified' that returns true if setVal was ever called.
ANSWER
public class Value
{
private boolean modified = false;
private int val;
public Value(int val)
{
this.val=val;
}
public int getVal()
{
return val;
}
public void setVal(int val)
{
this.val = val;
modified=true;
}
public boolean wasModified()
{
return modified;
}
}
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20772
Write a class definition of a class named 'Value ' with the following:
a constructor accepting a single integer parameter
a constructor with no parameters
a method 'setVal' that accepts a single parameter ,
a boolean method , 'wasModified' that returns true if setVal was ever called for the object .
a method 'getVal' that returns an integer value as follows: if setVal has ever been called, it getVal returns the last value passed to setVal. Otherwise if the "single int parameter " constructor was used to create the object , getVal returns the value passed to that constructor . Otherwise getVal returns 0.
public class Value
{
private boolean modified = false;
public int val;
public Value(int v)
{
val=v;
}
public int getVal()
{
return val;
}
public void setVal(int st)
{
val=st;
modified=true;
}
public boolean wasModified()
{
return modified;
}
}
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20614
Write a conditional that assigns the boolean value true to the variable fever if the variable temperature is greater than 98.6
So if temperature has the value 99.5, after your code executes fever would have the value true.
On the other hand, if temperature has the value 96.3, your code will not change the value of fever at all.
ANSWER
if ( temperature > 98.6 ) fever = true ;
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20615
Write a conditional that assigns 10,000 to the variable bonus if the value of the variable goodsSold is greater than 500,000 .
ANSWER
if ( goodsSold > 500000 ) bonus = 10000 ;
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20616
Write a conditional that decreases the variable shelfLife by 4 if the variable outsideTemperature is greater than 90 .
ANSWER
if ( outsideTemperature > 90 ) shelfLife -= 4 ;
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20617
Write a conditional that multiplies the value of the variable pay by one-and-a-half if the value of the boolean variable workedOvertime is true .
ANSWER
if ( workedOvertime == true ) pay *= 1.5 ;
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