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Q31. Given:
Which of the following is equivalent to the above code fragment?
A. System.out.printLn(x>10?">,': "<":,'=");
B. System.out.println(x>10? ">"?"<":"=");
C. System.out.println(x>10?">":x<10?"<":"=");
D. System.out.printLn(x>10?">"?,'<"?"=");
E. None of the above
Answer: B
Explanation:
Option A is incorrect as we can't use abstract with non abstract method, (here method has method body.) Option C is incorrect as when overriding method we can't use more restrictive access modifier, so trying to use private to override default access Level method causes a compile time error. Option D is incorrect as default methods (not methods with default access level) are allowed only in interfaces. Option E is incorrect as method all ready has void as return type, so we can't add int there. Option B is correct as we can use final there, since the method is non abstract
https://docs.oracle.com/javase/tutorial/java/landl/polymorphism.html
Q32. Given the code fragment:
And given the requirements:
. If the value of the qty variable is greater than or equal to 90, discount = 0.5
. If the value of the qty variable is between 80 and 90, discount = 0.2
Which two code fragments can be independently placed at line n1 to meet the requirements?
A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
Answer: A,C
Q33. Given:
public class ColorTest {
public static void main(String[] args) {
String[] colors = {"red", "blue","green","yellow","maroon","cyan"};
int count = 0;
for (String c : colors) {
if (count >= 4) {
break;
}
else {
continue;
}
if (c.length() >= 4) {
colors[count] = c.substring(0,3);
}
count++;
}
System.out.println(colors[count]);
}
}
What is the result?
A. Yellow
B. Maroon
C. Compilation fails
D. A StringIndexOutOfBoundsException is thrown at runtime.
Answer: C
Explanation: The line, if (c.length() >= 4) {, is never reached. This causes a compilation error.
Note: The continue statement skips the current iteration of a for, while , or do-while loop. An unlabeled.break.statement terminates the innermost.switch,.for,.while, or.do-while.statement, but a labeled.break.terminates an outer statement.
Q34. Given the code fragment:
What is the result?
A. Match 1
B. Match 2
C. No Match
D. A NullPointerException is thrown at runtime.
Answer: B
Explanation:
it will compare the string contents of the StringBuilder with string object.
Q35. public class StringReplace {
public static void main(String[] args) {
String message = "Hi everyone!";
System.out.println("message = " + message.replace("e", "X")); }
}
What is the result?
A. message = Hi everyone!
B. message = Hi XvXryonX!
C. A compile time error is produced.
D. A runtime error is produced.
E. message =
F. message = Hi Xveryone!
Answer: B
Q36. Given:
public class String1 {
public static void main(String[] args) {
String s = "123";
if (s.length() >2)
s.concat("456");
for(int x = 0; x <3; x++)
s += "x";
System.out.println(s);
}
}
What is the result?
A. 123
B. 123xxx
C. 123456
D. 123456xxx
E. Compilation fails
Answer: B
Explanation: 123xxx
The if clause is not applied.
Note: Syntax of if-statement:
if ( Statement ) {
}
Q37. 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
Q38. Given:
What is the result?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: B
Q39. Given:
What is the result?
A. The sum is 2
B. The sum is 14
C. The sum is 15
D. The loop executes infinite times
E. Compilation fails
Answer: E
Q40. Given:
public class Test {
public static void main(String[] args) {
int ax = 10, az = 30;
int aw = 1, ay = 1;
try {
aw = ax % 2;
ay = az / aw;
} catch (ArithmeticException e1) {
System.out.println("Invalid Divisor");
} catch (Exception e2) {
aw = 1;
System.out.println("Divisor Changed");
}
ay = az /aw; // Line 14
System.out.println("Succesful Division " + ay);
}
}
What is the result?
A. Invalid Divisor
Divisor Changed
Successful Division 30
B. Invalid Divisor
Successful Division 30
C. Invalid Divisor
Exception in thread "main" java.lang.ArithmeticException: / by zero
at test.Teagle.main(Teagle.java:14)
D. Invalid Divisor
Exception in thread "main" java.lang.ArithmeticException: / by zero
at test.Teagle.main(Teagle.java:14)
Successful Division 1
Answer: C
