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class MWC101 {
public static void main(String[] args) {
int[] a1 = new int[]; // 1
int a2[] = new int[5]; // 2
int[] a3 = new int[]{1,2}; // 3
int []a4 = {1,2}; // 4
int[] a5 = new int[5]{1,2,3,4,5}; // 5
}}
Compile-time errors are generated at which lines?
| a. | 1 |
| b. | 2 |
| c. | 3 |
| d. | 4 |
| e. | 5 |
class MWC102 {
public static void main (String[] args) {
byte[] a = new byte[1]; long[] b = new long[1];
float[] c = new float[1]; Object[] d = new Object[1];
System.out.print(a[0]+","+b[0]+","+c[0]+","+d[0]);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: 0,0,0,null |
| b. | Prints: 0,0,0.0,null |
| c. | Compile-time error |
| d. | Run-time error |
| e. | None of the above |
class MWC103 {
public static void main(String[] args) {
int[] a1 = {1,2,3};
int []a2 = {4,5,6};
int a3[] = {7,8,9};
System.out.print(a1[1]+","+a2[1]+","+a3[1]);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: 12 |
| b. | Prints: 15 |
| c. | Prints: 18 |
| d. | Prints: 1,4,7 |
| e. | Prints: 2,5,8 |
| f. | Prints: 3,6,9 |
| g. | Compile-time error |
| h. | Run-time error |
| i. | None of the above |
class MWC104 {
public static void main(String[] args) {
int[5] a1; // 1
int []a2; // 2
int[ ]a3; // 3
int a4[]; // 4
}}
A compile-time error is generated at which line?
| a. | 1 |
| b. | 2 |
| c. | 3 |
| d. | 4 |
| e. | None of the above |
class MWC105 {
static boolean b1;
public static void main(String[] args) {
boolean[] array = new boolean[1];
boolean b2;
System.out.print(b1+",");
System.out.print(array[0]+",");
System.out.print(b2);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: true,true,true |
| b. | Prints: false,false,false |
| c. | Prints: null,null,null |
| d. | Prints: false,true,false |
| e. | Compile-time error |
| f. | Run-time error |
| g. | None of the above |