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2016 Dec 1z0-808 sample question

Q131. Given the code fragment from three files: 

Which code fragment, when inserted at line 2, enables the code to compile? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

E. Option E 

Answer:


Q132. Given: 

What is the result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q133. Which two statements are true for a two-dimensional array? 

A. It is implemented as an array of the specified element type. 

B. Using a row by column convention, each row of a two-dimensional array must be of the same size. 

C. At declaration time, the number of elements of the array in each dimension must be specified. 

D. All methods of the class Object may be invoked on the two-dimensional array. 

Answer: A,D 


Q134. Given: 

class MarksOutOfBoundsException extends IndexOutOfBoundsException { } 

public class GradingProcess { 

void verify(int marks) throws IndexOutOfBoundsException { 

if (marks > 100) { 

throw new MarksOutOfBoundsException(); 

if (marks > 50) { 

System.out.print("Pass"); 

} else { 

System.out.print("Fail"); 

public static void main(String[] args) { 

int marks = Integer.parseInt(args[2]); 

try { 

new GradingProcess().verify(marks)); 

} catch(Exception e) { 

System.out.print(e.getClass()); } } } 

And the command line invocation: 

Java grading process 89 50 104 

What is the result? 

A. Pass 

B. Fail 

C. Class MarketOutOfBoundsException 

D. Class IndexOutOfBoundsException 

E. Class Exception 

Answer:

Explanation: The value 104 will cause a MarketOutOfBoundsException 


Q135. Given: 

Which inserted at line 11, will provide the following output? 

[21, 15, 11] 

A. list.removelf(e > e%2 != 0); 

B. list.removelf(e -> e%2 != 0); 

C. Ust.removelf(e -> e%2 = 0); 

D. list.remove(e -> e%2 = 0); 

E. None of the above. 

Answer:

Explanation: 

In output we can see that only odd numbers present, so we need to remove only even numbers to get expected output. From Java SE 8, there is new method call removelf which takes predicate object and remove elements which satisfies predicate condition. Predicate has functional method call take object and check if the given condition met or not, if met it returns true, otherwise false. Option C we have passed correct lambda expression to check whether the number is odd or even that matches to the functional method of predicate interface. Option A is incorrect as it is invalid lambda expression. Option B is incorrect as it removes all odd numbers. Option D is incorrect as there is no remove method that takes predicate as argument. https://docs.oracle.eom/javase/8/docs/api/java/util/ArrayList.html 


Refresh 1z0-808 exam topics:

Q136. Given the following main method: 

What is the result? 

A. 5 4 3 2 1 0 

B. 5 4 3 2 1 

C. 4 2 1 

D. 5 

E. Nothing is printed 

Answer:

Explanation: 

Loop will run only once and after that num == 0 will break it After first cycle of the loop. 


Q137. Given the code fragment: 

StringBuilder sb = new StringBuilder ( ) ; 

Sb.append (“world”); 

Which code fragment prints Hello World? 

A. sb.insert(0,"Hello "); 

System.out.println(sb); 

B. sb.append(0,"Hello "); 

System.out.println(sb); 

C. sb.add(0,"Hello "); 

System.out.println(sb); 

D. sb.set(0,"Hello "); 

System.out.println(sb);D 

Answer:

Explanation: The java.lang.StringBuilder.insert(int offset, char c) method inserts the string representation of the char argument into this sequence. The second argument is inserted into the contents of this sequence at the position indicated by offset. The length of this sequence increases by one.The offset argument must be greater than or equal to 0, and less than or equal to the length of this sequence. 

Reference: Java.lang.StringBuilder.insert() Method 


Q138. Given the following class: 

And given the following main method, located in another class: 

Which three lines, when inserted independently at line n1, cause the program to print a o balance? 

A. this.amount = 0; 

B. amount = 0; 

C. acct (0) ; 

D. acct.amount = 0; 

E. acct. getAmount () = 0; 

F. acct.changeAmount(0); 

G. acct.changeAmount(-acct.amount); 

H. acct.changeAmount(-acct.getAmount()); 

Answer: D,G,H 


Q139. Which statement is true about Java byte code? 

A. It can run on any platform. 

B. It can run on any platform only if it was compiled for that platform. 

C. It can run on any platform that has the Java Runtime Environment. 

D. It can run on any platform that has a Java compiler. 

E. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler. 

Answer:


Q140. Given: 

What is the output? 

A. 1Z0 

B. 1Z0-808 

C. An exception will be thrown. 

D. Compilation fails due to error at line 3. 

E. Compilation tails due to error at line 4. 

Answer:

Explanation: 

Option E is the correct answer. Code fails to compile because there is no method called concert in StringBuilder class. The concert method is in String class. Hence option E is correct Here we should have used append method of StringBuilder class, in that case option B would be correct. https://docs.oracle.com/javase/tutorial/java/data/buffers.html 



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