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AP Computer Science Final Exam with correct Answers
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AP Computer Science Final Exam with correct Answers
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AP Computer Science Final Exam with correct AnswersInheritance is the process of sharing methods and instance variables between a base class
and its subclasses (T/F). - Answer -True
The name of the text file with Java source code must match the name of the program with a
.class extension (T/F). - Answer -False
Both for loops and while loops can be used as count-controlled loops (T/F). - Answer -
True
It is illegal to declare several variables in a single declaration, i.e. int a, b, c; - Answer -
False
m++, m=m+1, and m+=1 are all equivalent expressions (T/F). - Answer -True
The assignment operator ( = ) and equal to operator ( == ) can be used interchangeably
(T/F). - Answer -False
A while loop will always execute at least once (T/F). - Answer -False
The counter in a for loop is updated at the beginning of the loop (T/F). - Answer -False
It is illegal to declare the loop control variable inside the for loop header (T/F). - Answer -False
The for statement combines counter initialization, condition test and counter update into a single expression (T/F). - Answer -True
It is usually safer to use the == or != operators in loops, rather than the other logical operators (T/F). - Answer -False
The identity of an object is simply the variable that references the object (T/F). - Answer -False A class's implementation details can be changed radically without affecting any of its clients provided its interface remains the same (T/F). - Answer -True
The keyword public indicates that the class is accessible to all potential clients (T/F). - Answer -True
Constructors do not have return types, but all other methods do (T/F). - Answer -True
A class can include only one constructor (T/F). - Answer -False
A method can only have one return statement (T/F). - Answer -False
The OR operand evaluates to false if one operand is false (T/F). - Answer -False
Nested if statements offer an alternative to deal with a programs logical complexity (T/F). - Answer -True
Java uses complete evaluation, in which all parts of a Boolean expression are always evaluated (T/F). - Answer -False
Consider the following code segment:
int x = 7;
int y = 3;
if ( (x<10) && (y<0) )
System.out.println("Value is: " +x*y);
else
System.out.println("Value is: " + x/y); - Answer -Value is: 2
Assume that a and b have been defined and initialized as int values. The expression
!(! (a!=b) && (b>7))
is equivalent to which of the following? - Answer -(a != b) || (b <= 7)
Consider the following code segment.
int sum = 0;
int k =1;
while (sum < 12 || k<4)
sum += k;
System.out.println(sum);
What is printed as a result of executing the code segment? - Answer -Nothing is printed due to an infinite loop.
Consider the following code segment.
int num = 2574;
int result = 0;
while (num > 0) {
result = result * 10 + num % 10;
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