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Q21. Given:
And given the commands:
javac Test.Java
Java Test Hello
What is the result?
A. Success
B. Failure
C. Compilation fails.
D. An exception is thrown at runtime
Answer: B
Q22. Given:
What is the result?
A. 2 4 6 8
B. 2 4 6 8 9
C. 1 3 5 7
D. 1 3 5 7 9
Answer: D
Q23. Which three are advantages of the Java exception mechanism?
A. Improves the program structure because the error handling code is separated from the normal program function
B. Provides a set of standard exceptions that covers all the possible errors
C. Improves the program structure because the programmer can choose where to handle exceptions
D. Improves the program structure because exceptions must be handled in the method in which they occurred
E. Allows the creation of new exceptions that are tailored to the particular program being created
Answer: A,C,E
Q24. Given the code fragment:
What is the result if the integer aVar is 9?
A. 10 Hello World!
B. Hello Universe!
C. Hello World!
D. Compilation fails.
Answer: A
Q25. Given:
What is the result?
A. true:true
B. true:false
C. false:true
D. false:false
Answer: C
Q26. Given the following classes:
Which two options fail to compile when placed at line n1 of the main method?
A. employee.salary = 50_000;
B. director.salary = 80_000;
C. employee.budget = 200_000;
D. manager.budget = 1_000_000;
E. manager.stockOption = 500;
F. director.stockOptions = 1_000;
Answer: C,E
Q27. Given:
public class MyClass {
public static void main(String[] args) {
String s = " Java Duke ";
int len = s.trim().length();
System.out.print(len);
}
}
What is the result?
A. 8
B. 9
C. 11
D. 10
E. Compilation fails
Answer: B
Explanation: Java - String trim() Method
This method returns a copy of the string, with leading and trailing whitespace omitted.
Q28. Given the code fragment:
What is the result?
A. Reading Card Checking Card
B. Compilation fails only at line n1.
C. Compilation fails only at line n2.
D. Compilation fails only at line n3.
E. Compilation fails at both line n2 and line n3.
Answer: D
Q29. Given:
public class Test {
static boolean bVar;
public static void main(String[] args) {
boolean bVar1 = true;
int count =8;
do {
System.out.println("Hello Java! " +count);
if (count >= 7) {
bVar1 = false;
}
} while (bVar != bVar1 && count > 4);
count -= 2;
}
}
What is the result?
A. Hello Java! 8 Hello Java! 6 Hello Java! 4
B. Hello Java! 8 Hello Java! 6
C. Hello Java! 8
D. Compilation fails
Answer: C
Explanation: Hello Java! 8
Q30. Given the code fragment:
Which option represents the state of the num array after successful completion of the outer loop?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: A