SCJP Questions And Answers

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- 24 - Question No 42
Given:
3. string foo = "ABCDE";
4. foo.substring(3);
5. foo.concat("XYZ"); 6.
Type the value of foo at line 6.

Answer: ABCDE

Question No 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));

Answer: C

Question No 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.

Answer: D

Question No 45
Which statement is true for the class java.util.HashSet?