ICSE Class 10th Board Exams 20 MCQ Questions on Java Library Methods "return types"

 ICSE Class 10th Board Exams

20 MCQ questions on Java library methods return types

1. What is the return type of the "charAt()" method in the "String" class?

   a. int

   b. char

   c. String

   d. boolean

2. In the "Math" class, what is the return type of the "sqrt()" method?

   a. int

   b. double

   c. float

   d. long

3. What does the "length()" method in the "String" class return?

   a. int

   b. double

   c. boolean

   d. String

4. In the "ArrayList" class, what is the return type of the "add()" method?

   a. void

   b. int

   c. boolean

   d. String

5. What is the return type of the "toUpperCase()" method in the "String" class?

   a. char

   b. String

   c. int

   d. boolean

6. In the "Scanner" class, what is the return type of the "nextInt()" method?

   a. int

   b. String

   c. double

   d. boolean

7. What does the "indexOf()" method in the "String" class return?

   a. int

   b. char

   c. boolean

   d. String

8. In the "Arrays" class, what is the return type of the "sort()" method?

   a. void

   b. int

   c. boolean

   d. String

9. What is the return type of the "charAt()" method in the "StringBuilder" class?

   a. int

   b. char

   c. String

   d. boolean

10. In the "File" class, what is the return type of the "exists()" method?

    a. boolean

    b. int

    c. String

    d. void

11. What does the "toLowerCase()" method in the "String" class return?

    a. char

    b. String

    c. int

    d. boolean

12. In the "ArrayList" class, what is the return type of the "remove()" method?

    a. void

    b. int

    c. boolean

    d. String

13. What is the return type of the "nextLine()" method in the "Scanner" class?

    a. String

    b. int

    c. double

    d. boolean

14. In the "Character" class, what is the return type of the "isDigit()" method?

    a. char

    b. String

    c. int

    d. boolean

15. What does the "length()" method in the "StringBuilder" class return?

    a. int

    b. char

    c. String

    d. boolean

16. In the "Arrays" class, what is the return type of the "binarySearch()" method?

    a. int

    b. void

    c. boolean

    d. String

17. What is the return type of the "equals()" method in the "String" class?

    a. int

    b. char

    c. boolean

    d. String

18. In the "File" class, what is the return type of the "length()" method?

    a. int

    b. boolean

    c. String

    d. void

19. What does the "substring()" method in the "String" class return?

    a. char

    b. String

    c. int

    d. boolean

20. In the "ArrayList" class, what is the return type of the "get()" method?

    a. void

    b. int

    c. Object

    d. boolean

1. b, 2. b, 3. a, 4. a, 5. b, 6. a, 7. a, 8. a, 9. b, 10. a, 11. b, 12. a, 13. a, 14. d, 15. a, 16. a, 17. c, 18. a, 19. b, 20. c