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Java Standard Edition 5 Programmer Certified Professional Exam
Question No: 21 – (Topic 1)
Given:
-
String test = quot;This is a testquot;;
-
String[] tokens = test.split(quot;\squot;);
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System.out.println(tokens.length); What is the result?
-
An exception is thrown at runtime.
-
1
-
4
-
Compilation fails.
-
0
Answer: D
Question No: 22 – (Topic 1)
Given:
12. System.out.format(quot;Pi is approximately %d.quot;, Math.PI); What is the result?
-
An exception is thrown at runtime.
-
Pi is approximately 3.
-
Pi is approximately 3.141593.
-
Compilation fails.
Answer: A
Question No: 23 DRAG DROP – (Topic 1)
Click the Task button.
Answer:
Question No: 24 – (Topic 1)
Given:
-
static class A {
-
void process() throws Exception { throw new Exception(); }
13. }
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static class B extends A {
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void process() { System.out.println(quot;B quot;); }
16. }
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public static void main(String[] args) {
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A a = new B();
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a.process();
20. }
What is the result?
-
Compilation fails because of an error in line 19.
-
An exception is thrown at runtime.
-
B
-
Compilation fails because of an error in line 18.
-
Compilation fails because of an error in line 15.
-
The code runs with no output.
Answer: A
Question No: 25 – (Topic 1)
Given:
-
interface A { public void aMethod(); }
-
interface B { public void bMethod(); }
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interface C extends A,B { public void cMethod(); }
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class D implements B {
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public void bMethod(){} 6. }
-
-
class E extends D implements C {
-
public void aMethod(){}
-
public void bMethod(){}
-
public void cMethod(){}
11. }
What is the result?
-
If you define D e = new E(), then e.bMethod() invokes the version of bMethod() defined in Line 5.
-
If you define D e = (D)(new E()), then e.bMethod() invokes the version of bMethod() defined in Line 5.
-
Compilation fails because of an error in line 9.
-
If you define D e = (D)(new E()), then e.bMethod() invokes the version of bMethod() defined in Line 9.
-
Compilation fails because of an error in line 3.
-
Compilation fails because of an error in line 7.
Answer: D
Question No: 26 – (Topic 1)
Click the Exhibit button.
What is the output of the program shown in the exhibit?
A. 300-300-100-100-100
B. 300-300-300-100-100
C. 300-300-300-300-100
D. 300-100-100-100-100
Answer: A
Question No: 27 – (Topic 1)
Given:
-
NumberFormat nf = NumberFormat.getInstance();
-
nf.setMaximumFractionDigits(4);
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nf.setMinimumFractionDigits(2);
-
String a = nf.format(3.1415926);
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String b = nf.format(2);
Which two statements are true about the result if the default locale is Locale.US? (Choose two.)
-
The value of b is 2.00.
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The value of a is 3.141.
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The value of a is 3.14.
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The value of b is 2.0000.
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The value of a is 3.1415.
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The value of a is 3.1416.
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The value of b is 2.
Answer: A,F
Question No: 28 – (Topic 1)
Given:
-
// insert code here
-
private N min, max;
-
public N getMin() { return min; }
-
public N getMax() { return max; }
-
public void add(N added) {
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if (min == null || added.doubleValue() lt; min.doubleValue()) 17. min = added;
18. if (max == null || added.doubleValue() gt; max.doubleValue()) 19. max = added;
20. }
21. }
Which two, inserted at line 11, will allow the code to compile? (Choose two.)
-
public class MinMaxlt;? extends Objectgt; {
-
public class MinMaxlt;N extends Integergt; {
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public class MinMaxlt;N extends Objectgt; {
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public class MinMaxlt;N extends Numbergt; {
-
public class MinMaxlt;?gt; {
-
public class MinMaxlt;? extends Numbergt; {
Answer: B,D
Question No: 29 – (Topic 1)
Given:
-
class A {
-
public void process() { System.out.print(quot;A,quot;); }
-
class B extends A {
-
public void process() throws IOException {
-
super.process();
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System.out.print(quot;B,quot;);
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throw new IOException();
18. }
-
public static void main(String[] args) {
-
try { new B().process(); }
-
catch (IOException e) { System.out.println(quot;Exceptionquot;); }} What is the result?
-
Compilation fails because of an error in line 14.
-
Exception
-
A,B,Exception
-
Compilation fails because of an error in line 20.
-
A NullPointerException is thrown at runtime.
Answer: A
Question No: 30 DRAG DROP – (Topic 1)
Click the Task button.
Answer:
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