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Q131. Given the code fragment: 

What is the result? 

A. 100 

B. 101 

C. 102 

D. 103 

E. Compilation fails 

Answer:

Q132. Given: 

What is the result? 

A. 1 

B. 1 

C. 2 

D. Compilation fails 

E. The loop executes infinite times 

Answer:

Q133. Which two statements correctly describe checked exception? 

A. These are exceptional conditions that a well-written application should anticipate and recover from. 

B. These are exceptional conditions that are external to the application, and that the application usually cannot anticipate or recover from. 

C. These are exceptional conditions that are internal to the application, and that the application usually cannot anticipate or recover from. 

D. Every class that is a subclass of RuntimeException and Error is categorized as checked exception. 

E. Every class that is a subclass of Exception, excluding RuntimeException and its subclasses, is categorized as checked exception. 

Answer: B,D 

Explanation: Checked exceptions: 

* (B) represent invalid conditions in areas outside the immediate control of the program (invalid user input, database problems, network outages, absent files) 

* are subclasses of Exception It's somewhat confusing, but note as well that RuntimeException (unchecked) is itself a subclass of Exception (checked). 

* a method is obliged to establish a policy for all checked exceptions thrown by its implementation (either pass the checked exception further up the stack, or handle it somehow) 

Reference: Checked versus unchecked exceptions 

Q134. 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 

Q135. boolean log3 = ( 5.0 != 6.0) && ( 4 != 5); 

boolean log4 = (4 != 4) || (4 == 4); 

System.out.println("log3:"+ log3 + \\nlog4" + log4); 

What is the result? 

A. log3:false log4:true 

B. log3:true log4:true 

C. log3:true log4:false 

D. log3:false log4:false 

Answer:

Q136. Given: 

What is the result? 

A. Area is 6.0 

B. Area is 3.0 

C. Compilation fails at line n1 

D. Compilation fails at line n2. 

Answer:

Q137. Which two are valid array declaration? 

A. Object array[]; 

B. Boolean array[3]; 

C. int[] array; 

D. Float[2] array; 

Answer: A,C 

Q138. A method is declared to take three arguments. A program calls this method and passes only two arguments. What is the results? 

A. Compilation fails. 

B. The third argument is given the value null. 

C. The third argument is given the value void. 

D. The third argument is given the value zero. 

E. The third argument is given the appropriate falsy value for its declared type. F) An 

exception occurs when the method attempts to access the third argument. 

Answer:

Q139. Given the code fragment: 

public class Test { 

public static void main(String[] args) { 

boolean isChecked = false; 

int arry[] = {1,3,5,7,8,9}; 

int index = arry.length; 

while ( <code1> ) { 

if (arry[index-1] % 2 ==0) { 

isChecked = true; 

<code2> 

System.out.print(arry(index]+", "+isChecked)); 

Which set of changes enable the code to print 1, true? 

A. Replacing <code1> with index > 0 and replacing <code2> with index–; 

B. Replacing <code1> with index > 0 and replacing <code2> with –index; 

C. Replacing <code1> with index > 5 and replacing <code2> with –index ; 

D. Replacing <code1> with index and replacing <code2> with –index ; 

Answer:

Explanation: 

Note: Code in B (code2 is –index;). also works fine. 

Q140. Which usage represents a valid way of compiling java source file with the name "Main"? 

A. javac Main.java 

B. java Main.class 

C. java Main.java 

D. javac Main 

E. java Main 

Answer:

Explanation: The compiler is invoked by the javac command. When compiling a Java class, you must include the file name, which houses the main classes including the Java extension. So to run Main.java file we have to use command in option A. TO execute Java program we can use Java command but can't use it for compiling. https://docs.oracle.com/javase/tutorial/getStarted/application/index.html 

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