Attempting To Compile And Run The Java Program
10 Questions
| Total Attempts: 366
(126).jpg "Attempting To Compile And Run The Java Program")
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Questions and Answers
- 1.class ColorException extends Exception {} class WhiteException extends ColorException {} class White { void m1() throws ColorException {throw new WhiteException();} void m2() throws WhiteException {} public static void main (String[] args) { White white = new White(); int a,b,d,f; a = b = d = f = 0; try {white.m1(); a++;} catch (ColorException e) {b++;} try {white.m2(); d++;} catch (WhiteException e) {f++;} System.out.print(a+","+b+","+d+","+f); }} What is the result of attempting to compile and run the program?
- A.
Prints: 0,1,0,0
- B.
Prints: 1,1,0,0
- C.
Prints: 0,1,1,0
- D.
Prints: 1,1,1,0
- 2.interface A { void m1(); // 1 public void m2(); // 2 protected void m3(); // 3 private void m4(); // 4 } Compile-time errors are generated at which lines?
- A.
1
- B.
2
- C.
3
- D.
4
- 3.Which of the following are modifiers that can be applied to an interface that is a member of a directly enclosing interface?
- A.
Abstract
- B.
Implements
- C.
Final
- D.
Private
- E.
Protected
- F.
Public
- 4.interface A { int a = 1; // 1 public int b = 2; // 2 public static int c = 3; // 3 public static final int d = 4; // 4 } Which field declaration results in a compile-time error?
- A.
1
- B.
2
- C.
3
- D.
3,4
- E.
4
- F.
None of the above
- 5.Which of the following are not methods of the java.lang.String class?
- A.
Append
- B.
Concat
- C.
Delete
- D.
Insert
- E.
Substring
- 6.class MWC106 { static void m1(String s) { s = s.trim(); s = s.concat("D"); } public static void main(String[] s) { String s1 = "A", s2 = " B ", s3 = "C"; m1(s2); System.out.print(s1 + s2 + s3); }} What is the result of attempting to compile and run the program?
- A.
Prints: A B C
- B.
Prints: ABC
- C.
Prints: A B CD
- D.
Compile-time error
- E.
None of the above
- 7.What is the result of compiling and running this program? class Mammal{ void eat(Mammal m){ System.out.println("Mammal eats food"); } } class Cattle extends Mammal{ void eat(Cattle c){ System.out.println("Cattle eats hay"); } } class Horse extends Cattle{ void eat(Horse h){ System.out.println("Horse eats hay"); } } public class Test{ public static void main(String[] args){ Mammal h = new Horse(); Cattle c = new Horse(); c.eat(h); } }
- A.
Prints "Mammal eats food"
- B.
Prints "Cattle eats hay"
- C.
Prints "Horse eats hay"
- D.
Class cast Exception at runtime
- 8.class MWC117 { public static void main (String[] args) { System.out.print(String.valueOf(1) + String.valueOf(2)); String s1 = "S1"; String s2 = s1.toString(); System.out.print("," + (s1==s2)); }} What is the result of attempting to compile and run the program?
- A.
Prints: 3,false
- B.
Prints: 3,true
- C.
Prints: 12,false
- D.
Prints: 12,true
- E.
None of the above
- 9.class MWC200 { public static void main (String[] args) { String s1 = "ABC"; StringBuffer s2 = new StringBuffer(s1); System.out.print(s2.equals(s1) + "," + s1.equals(s2)); }} What is the result of attempting to compile and run the program?
- A.
Prints: false,false
- B.
Prints: true,false
- C.
Run-time error
- D.
Prints: true,true
- 10.import java.util.*; class GFC112 { public static void main (String[] args) { Object m = new LinkedHashSet(); System.out.print((m instanceof Collection)+","); System.out.print((m instanceof Set)+","); System.out.print(m instanceof List); }} What is the result of attempting to compile and run the program?
- A.
Prints: false,false,false
- B.
Prints: false,false,true
- C.
Prints: false,true,false
- D.
Prints: true,true,false
- E.
Prints: true,true,true
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