1.
In a
Mark for Review
project, (1) Points
2 of the
classes
must
contain a
main
method.
True or
False?
True
False (*)
Correct
2. A workspace can not have more than one stored projects.
Mark for Review
True or false?
(1) Points
True
False (*)
Correct
3. What is the purpose of the Eclipse Editor Area and Views?
Mark for Review
(1) Points
(Choose all correct answers)
To choose the file system location to delete a file.
To navigate a hierarchy of information. (*)
To modify elements. (*)
Correct
4. The following defines a package keyword:
Mark for Review
(1) Points
Precedes the name of the class.
Provides the compiler information that identifies
outside classes used within the current class.
Defines where this class lives relative to other classes,
and provides a level of access control. (*)
Correct
5. When importing another package into a class you must
Mark for Review
import only the package classes that will be called and not (1) Points
the entire package. True or false?
True
False (*)
Correct
6.When
Mark for Review
importing
(1) Points
another
package
into a class
you must
import the
entire
package as
well as the
package
classes
that will
be called.
True or
False?
True
False (*)
Correct
7. The following defines a class keyword:
Mark for Review
(1) Points
Precedes the name of the class. (*)
Provides the compiler information that identifies
outside classes used within the current class.
Defines where this class lives relative to other
classes, and provides a level of access control.
Correct
8. What is the result when the following code segment is
Mark for Review
compiled and executed? (1) Points
int x = 22, y = 10;
double p = Math.sqrt( ( x + y ) /2);
System.out.println(p);
4.0 is displayed (*)
5.656854249492381 is displayed
Syntax error "sqrt(double) in java.lang.Math cannot
be applied to int"
ClassCastException
2.2 is displayed
Correct
9. Which line of Java code assigns the value of 5 raised to
Mark for Review
the power of 8 to a? (1) Points
double a=pow(8,5);
double a=15^8;
int a=Math.pow(5,8);
int a=Math.pow(8,5);
double a=Math.pow(5,8); (*)
Correct
10. Which of the following is the name of a Java primitive
Mark for Review
data type? (1) Points
Object
Rectangle
String
int (*)
Incorrect. Refer to Section 4
Lesson 3.
1Given
Mark for
1.the
Review
followin
(1) Points
g
declarati
on:
int
z=5,m=
6;
Which
line of
Java
code
properly
casts
one type
into
another
without
data
loss?
double x=(double)z/m; (*)
double x=z/m;
double x=(double)(z/m);
double x= double z/m;
Correct
12. Write a declaration statement that will hold a number like 2.541.
Mark for
Review
(1) Points
int number;
float number; (*)
boolean number;
char number;
Correct
13. What is printed by the following code segment?
Mark for
Review
(1) Points
\\
\\\\\\\\\\\\\\
\\\\
\\\\\\\ (*)
Correct
14. What will the following code segment output?
Mark for
String s="\\\\\\\\";
Review
System.out.println(s);
(1) Points
\\\\ (*)
\\\\\\\\
"\\\\\"
\\
Correct
15. What will the following code segment output?
Mark for
Review
String s="\\\n\"\n\\\n\"";
(1) Points
System.out.println(s);
""\
""
\
""
\
"
\
" (*)
\" \"
"
\
"
\
"
"
Correct
1 The
Mark for
. followi
Review
ng
(1) Points
define
s an
import
keywo
rd:
Defines where this class lives relative to other classes, and provides a
level of access control.
Provides the compiler information that identifies outside classes used
within the current class. (*)
Precedes the name of the class.
Correct
2. Which of the two diagrams below illustrate the general form of a Java
Mark for
program?
Review
(1) Points
Example A
Example B (*)
Correct
3. The following defines a class keyword:
Mark for
Review
(1) Points
Precedes the name of the class. (*)
Provides the compiler information that identifies outside classes used
within the current class.
Defines where this class lives relative to other classes, and provides a
level of access control.
Correct
4. The following defines an import keyword:
Mark for
Review
(1) Points
Precedes the name of the class.
Provides the compiler information that identifies outside classes used
within the current class. (*)
Defines where this class lives relative to other classes, and provides a
level of access control.
Correct
5. What is the output of the following lines of code?
Mark for
Review
int j=7,k=5,m=8,result;
(1) Points
result=j-k%3*m;
System.out.println(result);
16
-9 (*)
0
Correct
Correct
8. Which of the following is not a legal name for a variable?
Mark for Review
(1) Points
zero
2bad (*)
theLastValueButONe
year2000
Correct
9. A local variable has precedence over a global variable in a Java method. True or
false? Mark for Review
(1) Points
True (*)
False
Correct
10.Given the code
Mark for Review
String s1 = "abcdef"; (1) Points
String s2 = "abcdef";
String s3 = new String(s1);
Which of the following would equate to false?
s3 == s1 (*)
s1 = s2
s1 == s2
s3.equals(s1)
s1.equals(s2)
Correct
11.The ==
Mark for
operator
Review
can be
(1) Points
used to
compare
two String
objects.
The result
is always
true if the
two
strings are
have the
exact
same
characters
in each
position
of the
String.
True or
false?
True
False (*)
Correct
12. Consider the following code snippet
Mark for Review
(1) Points
String forest = new String("Black");
System.out.println(forest.length());
What is printed?
Black
Forest
5 (*)
Correct
13. Multiple windows are used when more than one file is open in
Mark for Review
the edit area. True or False?
(1) Points
True
False (*)
Correct
14. The ______________ is the location into which you will store and
Mark for Review
save your files.
(1) Points
Perspective
Workspace (*)
Editor
None of the above
Correct
15. In a project, 2 of the classes must contain a main method. True or
Mark for Review
False?
(1) Points
True
False (*)
Correct
