class Y {
public static void main(String[] args) {
int a[] = { 1, 2, 053, 4 };
int b[][] = { { 1, 2, 4 }, { 2, 2, 1 }, { 0, 43, 2 } };
System.out.print(a[3] == b[0][2]);
System.out.print(" " + (a[2] == b[2][1]));
}
}
What is the result?
A - true false B - false false C - false true D - true true E - Compilation fails.Answer: D
class Y {
public static void main(String[] args) {
int a[] = { 1, 2, 3, 4 }; // Line 3
System.out.print(a instanceof Object); // Line 4
}
}
What is the result?
A - Compilation fails due to error at line 3. B - Compilation fails due to error at line 4. C - Will produce output as false. D - Will produce output as true. E - Length of this array is 3.Answer: D
- A and E are classes - B and D are interfacesWhich are true? (Choose two)
A - interface I implements B, D { }
B - interface I implements D { }
C - interface I extends D { }
D - interface I extends E { }
E - interface I extends B, D { }
Answer: C, E
- A and E are classes - B and D are interfaces - C is an abstract classWhich are true? (Choose three)
A - class I implements B, C { }
B - class I implements B { }
C - class I extends A, E { }
D - class I extends E { }
E - class I implements B, D { }
Answer: B, D, E
public class DoCompare {
public static void main(String[] args) {
String[] table = { "aa", "bb", "cc" };
for (String ss : table) {
int ii = 0;
while (ii < table.length) {
System.out.println(ss + ", " + ii);
ii++;
}
}
}
}
How many times is 2 printed as a part of the output?
A - Zero. B - Once. C - Twice. D - Thrice. E - Compilation fails.Answer: D
class Y {
public static void main(String args[]) {
int x = 0, y = 5;
try {
y /= x;
}
System.out.print("Divide by 0");
catch (Exception e) {
System.out.print("error");
}
}
}
What is the result?
A - 0 B - Error. C - Compilation fails. D - An uncaught exception is thrown at runtime. E - No output.Answer: C
int[] array = { 1, 2, 3, 4, 5, 6 };
int i = array.length - 1;
while (i >= 0) {
System.out.print(array[i]);
i--;
}
What is the result?
A - 12345 B - 65432 C - 123456 D - 654321 E - An exception could be thrown at runtime. F - No output.Answer: D
import java.io.IOException;
public class Y {
public static void main(String[] args) {
try {
doSomething();
} catch (RuntimeException e) {
System.out.println(e);
}
}
static void doSomething() {
if (Math.random() > 0.5)
throw new IOException();
throw new RuntimeException();
}
}
Which two actions, used independently, will remove compilation errors for this class?