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class JSC102 {
public static void main (String[] args) {
private int x = 1; protected int y = 2; public int z = 3;
System.out.println(x+y+z);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: 123 |
| b. | Prints: 1 2 3 |
| c. | Prints: 6 |
| d. | Run-time error |
| e. | Compile-time error |
| f. | None of the above |
class JSC105 {
private static int x; protected static int y; public static int z;
public static void main (String[] args) {System.out.println(x+y+z);}
}
What is the result of attempting to compile and run the program?
| a. | Prints nothing. |
| b. | Prints an undefined value. |
| c. | Prints: null |
| d. | Prints: 0 |
| e. | Run-time error |
| f. | Compile-time error |
| g. | None of the above |
class Red {
public int a; public static int b;
public static void main (String[] in) {
Red r1 = new Red(), r2 = new Red(); r1.a++; r1.b++;
System.out.print(r1.a+", "+r1.b+", "+r2.a+", "+r2.b);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: 0, 0, 0, 0 |
| b. | Prints: 0, 1, 1, 1 |
| c. | Prints: 1, 1, 1, 0 |
| d. | Prints: 1, 1, 0, 1 |
| e. | Prints: 1, 1, 0, 0 |
| f. | Prints: 1, 1, 1, 1 |
| g. | Compile-time error |
| h. | Run-time error |
| i. | None of the above |
class Basics {
int x = 1, y = 2;
public static void main (String[] args) {System.out.println(x+y);}
}
What is the result of attempting to compile and run the program?
| a. | Prints: x+y |
| b. | Prints: 12 |
| c. | Prints: 3 |
| d. | Run-time error |
| e. | Compile-time error |
| f. | None of the above |
Which of the following modifiers can be applied to the declaration of a field?
| a. | abstract |
| b. | final |
| c. | private |
| d. | protected |
| e. | public |
Which of the following modifiers can be applied to the declaration of a field?
| a. | static |
| b. | synchronized |
| c. | transient |
| d. | volatile |
| e. | native |
Which of the following is used to prevent the serialization of a non-static field?
| a. | final |
| b. | protected |
| c. | synchronized |
| d. | transient |
| e. | volatile |
| f. | native |
Which of the following statements are true?
| a. | A value can not be assigned to a final field more than once. |
| b. | A value can be assigned to a final field at any time or not at all. |
| c. | Only static variables can be declared final. |
| d. | A compile-time error is thrown if a blank final instance variable is not assigned a value before the end of each constructor. |
| e. | A field can not be declared both final and volatile. |
class JSC101 {
void m1() {
public int a; // 1
protected int b; // 2
private int c; // 3
static int d; // 4
transient int e; // 5
volatile int f; // 6
final int g = 1; // 7
}}
Compile-time errors are generated at which lines?
| a. | 1 |
| b. | 2 |
| c. | 3 |
| d. | 4 |
| e. | 5 |
| f. | 6 |
| g. | 7 |
class JSC103 {
transient float e = 1; // 1
volatile float f = 1; // 2
abstract float j = 1; // 3
final float g = 1; // 4
private final float k = 1; // 5
private transient float l = 1; // 6
volatile final float m = 1; // 7
}
Compile-time errors are generated at which lines?
| a. | 1 |
| b. | 2 |
| c. | 3 |
| d. | 4 |
| e. | 5 |
| f. | 6 |
| g. | 7 |
class JSC104{
public float a; // 1
protected float b; // 2
private float c; // 3
static float d; // 4
synchronized float i; // 5
}
A compile-time error is generated at which line?
| a. | 1 |
| b. | 2 |
| c. | 3 |
| d. | 4 |
| e. | 5 |
| f. | None of the above. |
class Identifiers {
int i1; // 1
int _i2; // 2
int i_3; // 3
int #i4; // 4
int $i5; // 5
int %i6; // 6
int i$7; // 7
int 8i; // 8
}
Compile-time errors are generated at which lines?
| a. | 1 |
| b. | 2 |
| c. | 3 |
| d. | 4 |
| e. | 5 |
| f. | 6 |
| g. | 7 |
| h. | 8 |