36. Which of the following gets the name of the parent directory file “file.txt”?

A. String name= File.getParentName(“file.txt”); B. String name= (new File(“file.txt”)).getParent(); C. String name = (new File(“file.txt”)).getParentName(); D. String name= (new File(“file.txt”)).getParentFile(); E. Directory dir=(new File (“file.txt”)).getParentDir(); String name= dir.getName();

37. Which can be used to encode charS for output?

A. java.io.OutputStream B. java.io.OutputStreamWriter C. java.io.EncodeOutputStream D. java.io.EncodeWriter E. java.io.BufferedOutputStream 38. The file “file.txt” exists on the file system and contains ASCII text.

Given:

38. try { 39. File f = new File(“file.txt”); 40. OutputStream out = new FileOutputStream(f, true); 41. } 42. catch (IOException) {}

What is the result?

A. The code does not compile. B. The code runs and no change is made to the file. C. The code runs and sets the length of the file to 0. D. An exception is thrown because the file is not closed. E. The code runs and deletes the file from the file system.

39. Which constructs a DataOutputStream?

A. new dataOutputStream(“out.txt”); B. new dataOutputStream(new file(“out.txt”)); C. new dataOutputStream(new writer(“out.txt”)); D. new dataOutputStream(new FileWriter(“out.txt”)); E. new dataOutputStream(new OutputStream(“out.txt”)); F. new dataOutputStream(new FileOutputStream(“out.txt”));

40. What writes the text “<end>” to the end of the file “file.txt”?

A. OutputStream out= new FileOutputStream (“file.txt”); Out.writeBytes (“<end>/n”); B. OutputStream os= new FileOutputStream (“file.txt”, true); DataOutputStream out = new DataOutputStream(os); out.writeBytes (“<end>/n”); C. OutputStream os= new FileOutputStream (“file.txt”); DataOutputStream out = new DataOutputStream(os); out.writeBytes (“<end>/n”); D. OutputStream os= new OutputStream (“file.txt”, true); DataOutputStream out = new DataOutputStream(os); out.writeBytes (“<end>/n”);

41. Given:

1. public class X ( 2. public object m () { 3. object o = new float (3.14F); 4. object [] oa = new object [1]; 5. oa[0]= o; 6. o = null; 7. return oa[0]; 8. } 9. }

When is the float object created in line 3, eligible for garbage collection?

A. Just after line 5 B. Just after line 6 C. Just after line 7 (that is, as the method returns) D. Never in this method

42. Given:

3. string foo = “ABCDE”; 4. foo.substring(3); 5. foo.concat(“XYZ”); 6.

Type the value of foo at line 6.

Ans:

43. Which method is an appropriate way to determine the cosine of 42 degrees?

A. double d = Math.cos(42); B. double d = Math.cosine(42); C. double d = Math.cos(Math.toRadians(42)); D. double d = Math.cos(Math.toDegrees(42)); E. double d = Math.cosine(Math.toRadians(42));

44. You need to store elements in a collection that guarantees that no duplicates are stored and all elements can be accessed in natural order. Which interface provides that capability?

A. java.util.Map B. java.util.Set C. java.util.List D. java.util.StoredSet E. java.util.StoredMap F. java.util.Collection

45. Which statement is true for the class java.util.HashSet?

A. The elements in the collection are ordered. B. The collection is guaranteed to be immutable. C. The elements in the collection are guaranteed to be unique. D. The elements in the collection are accessed using a unique key. E. The elements in the collections are guaranteed to be synchronized.

46. Given:

1. public class IfTest ( 2. public static void main(string[]args) { 3. int x = 3; 4. int y = 1; 5. if (x = y) 6. system.out.printIn(“Not equal”); 7. else 8. system.out.printIn(“Equal”); 9. } 10. )

What is the result? A. The output is “Equal”. B. The output in “Not Equal”. C. An error at line 5 causes compilation to fall. D. The program executes but does not print a message.

47. Click the exhibit button:

1. public class test ( 2. public static void main(string args[]) { 3. int 1= 0; 4. while (i) { 5. if (i==4) { 6. break; 7. ) 8. ++i; 9. ) 10. 11. ) 12. )

What is the value of i at line 10?

A. 0 B. 3 C. 4 D. 5 E. the code will not compile

48. Given:

3. int i= 1, j= 10 ; 4. do ( 5. if (i++> --j) continue; 6. ) while (i<5);

After execution, what are the values for I and j?

A. i = 6 and j= 5 B. i = 5 and j= 5 C. i = 6 and j= 4 D. i = 5 and j= 6 E. i = 6 and j= 6

49. Given:

1. switch (i) { 2. default: 3. System.out.printIn(“Hello”); 4. )

What are the two acceptable types for the variable i? (Choose Two)

A. char B. byte C. float D. double E. object