Pessoal,
Como vcs respondem a esses tipos de perguntas:
class MCZ15 {
  public static void main (String[] args) {
    float a = 1.1e1f;  // 1
    float b = 1e-1F;   // 2
    float c = .1e1f;   // 3
    double d = .1d;    // 4
    double e = 1D;     // 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 MCZ16 {
  public static void main (String[] args) {
    float a = 1;            // 1
    float b = 1L;           // 2
    float c = 1F;           // 3
    float d = 1.0;          // 4
}}
A compile-time error is generated at which line?
a. 	1
b. 	2
c. 	3
d. 	4
e. 	None of the above
class MCZ18 {
  public static void main (String[] args) {
    String a = "abcd";          // 1
    String b = "'\u0041'";      // 2
    String c = "\u0041";        // 3
    String d = "\uD7AF";        // 4
    System.out.print(a+b+c+d);  // 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 MCZ25 {
  public static void main (String[] args) {
    char a = '\7';   // 1
    char b = '\61';  // 2
    char c = '\062'; // 3
    char d = '\x7';  // 4
    char e = '\x41'; // 5
    System.out.print(""+a+b+c+d+e);
}}