QUESTION NO: 1
Given the code fragment:
String valid = "true";
if (valid) System.out.println (“valid”);
else system.out.println ("not valid");
What is the result?
A. Valid
B. not valid
C. Compilation fails
D. An IllegalArgumentException is thrown at run time
Answer: C
QUESTION NO: 2
Given:
public class DoCompare1 {
public static void main(String[] args) {
String[] table = {"aa", "bb", "cc"};
for (String ss: table) {
int ii = 0;
while (ii < table.length) {
System.out.println(ss + ", " + ii);
ii++;
}
}
How many times is 2 printed as a part of the output?
A. Zero
B. Once
C. Twice
D. Thrice
E. Compilation fails.
Answer: D
QUESTION NO: 3
Given:
public class x{
public static void main (string [] args){
String theString = "Hello World";
System.out.println(theString.charAt(11));
}
}
What is the result?
A. There is no output
B. d is output
C. A StringIndexOutOfBoundsException is thrown at runtime
D. An ArrayIndexOutOfBoundsException is thrown at runtime
E. A NullPointException is thrown at runtime
F. A StringArrayIndexOutOfBoundsException is thrown at runtime
Answer: C
QUESTION NO: 4
Given the code fragment:
String h1 = "Bob";
String h2 = new String ("Bob");
What is the best way to test that the values of h1 and h2 are the same?
A. if (h1 == h2)
B. if (h1.equals(h2))
C. if (h1 = = h2)
D. if (h1.same(h2))
Answer: B
QUESTION NO: 5
Given:
class X {}
class Y {Y () {}}
class Z {z(int i ) {} }
Which class has a default constructor?
A. X only
B. Y only
C. Z only
D. X and Y
E. Y and Z
F. X and Z
G. X, Y and Z
Answer: F
QUESTION NO: 6
Given the fragment:
int [] array = {1, 2, 3, 4, 5};
System.arraycopy (array, 2, array, 1, 2);
System.out.print (array [1]);
System.out.print (array[4]);
What is the result?
A. 14
B. 15
C. 24
D. 25
E. 34
F. 35
Answer: F
QUESTION NO: 7
Given:
public class MyFor3 {
public static void main(String [] args) {
int [] xx = null;
System.out.println(xx);
}
}
What is the result?
A. null
B. compilation fails
C. Java.lang.NullPointerException
D. 0
Answer: A
QUESTION NO: 8
Given:
public class ScopeTest1 {
public static void main(String[] args) {
doStuff(); // line x1
int x1 = x2; // line x2
int x2 = j; // line x3
}
static void doStuff() {
System.out.println(j); // line x4
}
static int j;
}
Which line causes a compilation error?
A. line x1
B. line x2
C. line x3
D. line x4
Answer: B
QUESTION NO: 9
Which declaration initializes a boolean variable?
A. boolean h = 1;
B. boolean k = 0;
C. boolean m = null;
D. boolean j = (1 < 5) ;
Answer: D
QUESTION NO: 10
You are writing a method that is declared not to return a value. Which two are permitted in the
method body?
A. omission of the return statement
B. return null;
C. return void;
D. return;
Answer: A,D
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