Question31
class GRC4 {public static void main(String[] args) {}} // 1
class GRC5 {public static void main(String []args) {}} // 2
class GRC6 {public static void main(String args[]) {}} // 3
What is the result of attempting to compile and run the above programs?
a. Compile-time error at line 1.
b. Compile-time error at line 2.
c. Compile-time error at line 3.
d. An attempt to run GRC4 from the command line fails.
e. An attempt to run GRC5 from the command line fails.
f. An attempt to run GRC6 from the command line fails.
g. None of the above
Question 32
class GRC7 {public void main(String[] args) {}} // 1
class GRC8 {public void main(String []args) {}} // 2
class GRC9 {public void main(String args[]) {}} // 3
What is the result of attempting to compile and run the above programs?
a. Compile-time error at line 1.
b. Compile-time error at line 2.
c. Compile-time error at line 3.
d. An attempt to run GRC7 from the command line fails.
e. An attempt to run GRC8 from the command line fails.
f. An attempt to run GRC9 from the command line fails.
Question 33
class GRC1 {public static void main(String[] args) {}} // 1
class GRC2 {protected static void main(String[] args) {}} // 2
class GRC3 {private static void main(String[] args) {}} // 3
What is the result of attempting to compile each of the three class
declarations and invoke each main method from the command line?
a. Compile-time error at line 1.
b. Compile-time error at line 2.
c. Compile-time error at line 3.
d. An attempt to run GRC1 from the command line fails.
e. An attempt to run GRC2 from the command line fails.
f. An attempt to run GRC3 from the command line fails.
Question 34
Which of these words belongs to the set of Java keywords?
a. Qualified
b. record
c. repeat
d. restricted
e. label
f. to
g. type
h. until
i. value
j. virtual
k. xor
l. None of the above
Question 35
Which of these words belong to the set of Java keywords?
a. exit
b. strictfp
c. enum
d. super
e. abort
f. event
g. goto
h. native
i. exception
Question 36
Which of these words belong to the set of Java keywords?
a. Double
b. goto
c. min
d. extern
e. new
f. signed
g. finally
h. const
i. and
j. array
k. do
Question37
Which of these words belong to the set of Java keywords?
a. declare
b. global
c. const
d. preserve
e. continue
f. Float
g. extends
h. select
i. break
j. dim
k. instanceOf
Question 38
Which of these words belong to the set of Java keywords?
a. next
b. catch
c. function
d. instanceof
e. mod
f. const
g. or
h. Boolean
i. goto
j. import
k. transient
Question 39
Which of these words belong to the set of Java keywords?
a. byte
b. short
c. int
d. long
e. decimal
f. int64
g. float
h. single
i. double
j. boolean
k. char
l. unsigned
m. array
n. string
Question 40
Which of these words belongs to the set of Java keywords?
a. clause
b. loop
c. expression
d. overrides
e. statement
f. assertion
g. validate
h. exception
i. cast
j. None of the above
Question 41
Which of these words belong to the set of Java keywords?
a. transient
b. serializable
c. runnable
d. run
e. volatile
f. externalizable
g. cloneable
Question 42
Which of these words belong to the set of Java keywords?
a. virtual
b. goto
c. ifdef
d. typedef
e. friend
f. struct
g. implements
h. union
i. const
Question 43
Which of these lists contains at least one word that is not a Java keyword?
a. abstract, default, if, private, this
b. do, implements, protected, boolean, throw
c. case, extends, int, short, try
d. import, break, double, exception, throws
e. byte, else, instanceof, return, transient
f. None of the above
Question 44
Which of these lists contains at least one word that is not a Java keyword?
a. interface, static, void, catch, final
b. char, strictfp, finally, long, volatile
c. native, super, class, float, while
d. const, for, new, switch, import
e. continue, finalize, goto, package, synchronized
f. None of the above
Question 45
class GFM11{
public static void main (String[] args) {
int x,y,z;
System.out.println(x+y+z);
}}What is the result of attempting to compile and run the program?
a. Prints nothing.
b. Prints an undefined value.
c. Prints: null
d. Prints: 0
e. Run-time error
f. Compile-time error
g. None of the above
Answers
|
31
|
g
|
None of the above
|
Section 12.1.4 of the Java Language Specification requires
that the main method must accept a single argument that is an array of
components of type String. In each of the three class declarations, the
single argument is indeed an array of components of type String. Please note
that the square brackets within an array declaration may appear as part of
the type or part of the declarator (i.e. array name).
|
|||||
|
32
|
d e
f
|
An attempt to run GRC7 from the command line fails.
An attempt to run GRC8 from the command line fails. An attempt to run GRC9
from the command line fails.
|
Section 12.1.4 of the JLS requires the main method to be
declared static. In this example, each of the three main methods are not
declared static. The result is an error at run-time.
|
|||||
|
33
|
e f
|
An attempt to run GRC2 from the command line fails.
An attempt to run GRC3 from the command line fails.
|
Section 12.1.4 of the JLS requires the main method to be
declared public. The main methods of GRC2 and GRC3 are not declared public
and can not be invoked from the command line using a JVM that is compliant
with section 12.1.4. Not every JVM enforces the rule. Even so, for the
purposes of the SCJP exam, the main method should be declared as required by
the JLS.
|
|||||
|
34
|
l
|
None of the above
|
All of these are keywords of the Pascal programming
language, but none are Java keywords.
|
|||||
|
35
|
b d
g h
|
strictfp super goto native
|
|
|||||
|
36
|
b e
g h k
|
goto new finally const do
|
|
|||||
|
37
|
c e
g i
|
const continue extends break
|
All of the letters of all Java keywords are lower case.
The word instanceof is a Java
keyword, but instanceOf is not.
|
|||||
|
38
|
b d
f i j k
|
catch instanceof const goto
import transient
|
|
|||||
|
39
|
a b
c d g i j k
|
byte short int long float
double boolean char
|
|
|||||
|
40
|
j
|
None of the above
|
|
|||||
|
41
|
a e
|
transient volatile
|
Serializable, Runnable, Externalizable,
and Cloneable are all interfaces. Thread.run is a method. The keywords transient and volatile are field modifiers.
|
|||||
|
42
|
b g
i
|
goto implements const
|
The words virtual,
ifdef, typedef, friend, struct and union
are all words related to the C programming language. Although the words const and goto
are also related to the C programming language, they are also Java keywords.
|
|||||
|
43
|
d
|
import, break, double, exception, throws
|
The word exception
is not a Java keyword. The words import,
break, double and throws
are Java keywords.
|
|||||
|
44
|
e
|
continue, finalize, goto, package, synchronized
|
The word finalize
is the name of a method of the Object
class: It is not a keyword. The words continue,
goto, package
and synchronized are all Java
keywords.
|
|||||
|
45
|
f
|
Compile-time error
|
Variables declared inside of a block or method are called
local variables; they are not automatically initialized. The compiler will
generate an error as a result of the attempt to access the local variables
before a value has been assigned.
|
|||||
No comments:
Post a Comment