Library Classes

Appeared in 11 of the 11 available papers.

Examined in

11 of 11 papers

Appears almost every year — treat as core

Typically worth

7.5 marks

Average per paper it appears in · 82 marks in total

Usual form

MCQ

39% of this chapter's 51 questions

Needs a diagram

No diagram questions in this chapter

Question-type distribution

MCQ20
Short answer17
Output10
Difference2
Definition2

Most frequent topics

Math class expressions 9Packages 4Nested Math methods 4Character class methods 3Return types of library methods 3Math class methods 2Boxing and unboxing 2Math.pow() and integer division 1

Print:Questions only Questions + answers Answers only

Print chapter question bank

Showing 25 of 51 matching questions (82 marks).

25 questions

Choose the correct answers to the questions from the given options. (Do not copy the questions, write only the correct answers.)

1(v)2026

MCQHard1 mark

What is the output of the statement Math.pow(36, 6/5);?

(a)36.0
(b)1.0
(c)73.71
(d)6.0

1(vii)2026

MCQHard1 mark

The output of the statement: System.out.println(Character.toUpperCase('b') + 2); is:

(a)66
(b)100
(c)68
(d)98

1(xiii)2026

MCQEasy1 mark

What is the type of parameter to be given for the method parseInt()?

(a)double
(b)String
(c)char
(d)int

2(iii)2026

Short answerEasy2 marks

Write the Java expression to find the sum of cube root of x and the absolute value of y.

Choose the correct answers to the questions from the given options. (Do not copy the questions, write only the correct answers.)

1(i)2025

MCQEasy1 mark

Character class methods are found in the package called:

(a)java.util
(b)java.lang
(c)java.awt
(d)java.io

1(viii)2025

MCQModerate1 mark

The output of Math.max(-7, Math.min(-5, -4)) is

(a)-5
(b)-4
(c)-7
(d)error

1(xvi)2025

MCQEasy1 mark

Which of the following converts "25" to 25.0?

(a)Double.Parsedouble("25")
(b)Double.parse("25")
(c)Double.parseDouble("25")
(d)Double.parseDouble(25)

2(i)2025

Short answerEasy2 marks

Write the java expression to find the product of square root of P and the square root of Q using the methods of Math class.

Choose the correct answers to the questions from the given options. (Do not copy the questions, write only the correct answers.)

1(viii)2024

MCQModerate1 mark

What is the output of Math.ceil(5.4) + Math.ceil(4.5)?

(a)10.0
(b)11.0
(c)12.0
(d)9.0

1(ix)2024

MCQEasy1 mark

What is the method to check whether a character is a letter or digit?

(a)isDigit(char)
(b)isLetterOrDigit()
(c)isLetterOrDigit(char)
(d)isLETTERorDIGIT(char)

1(xx)2024

MCQModerate1 mark

Which of the following mathematical methods returns only an integer?

(a)Math.ceil(n)
(b)Math.sqrt(n)
(c)Math.floor(n)
(d)Math.round(n)

2(i)2024

Short answerEasy2 marks

Write Java expression for: |a + b| / sqrt(a^2 + b^2)

2(v)2024

OutputModerate2 marks

What is value of x? String s1 = "45.50"; String s2 = "54.50"; double d1 = Double.parseDouble(s1); double d2 = Double.parseDouble(s2); int x = (int)(d1 + d2);

2(vii)2024

DifferenceModerate2 marks

Differentiate between boxing and unboxing.

2(x)2024

Short answerEasy2 marks

Primitive data types are built in data types which are a part of the wrapper classes. These wrapper classes are encapsulated in the java.lang package. Non primitive datatypes like Scanner class are a part of the utility package for which an object needs to be created. (a) To which package do the Character and Boolean classes belong? (b) Write the statement to access the Scanner class in the program.

Choose the correct answers to the questions from the given options. (Do not copy the questions, write only the correct answers.)

1(iv)2023

MCQEasy1 mark

The keyword used to call package in the program:

(a)extends
(b)export
(c)import
(d)package

1(v)2023

MCQModerate1 mark

What value will Math.sqrt(Math.ceil(15.3)) return?

(a)16.0
(b)16
(c)4.0
(d)5.0

1(x)2023

MCQHard1 mark

Predict the output of the following code snippet: String P = "20", Q = "22"; int a = Integer.parseInt(P); int b = Integer.valueOf(Q); System.out.println(a + "" + b);

(a)20
(b)20 22
(c)2220
(d)22

1(xviii)2023

MCQEasy1 mark

When an object of a Wrapper class is converted to its corresponding primitive data type, it is called as __________.

(a)Boxing
(b)Explicit type conversion
(c)Unboxing
(d)Implicit type conversion

2(i)2023

Short answerEasy2 marks

Write the Java expression for (a + b) raised to the power x.

2(iv)2023

OutputEasy2 marks

Give the output of the following Character class methods: (a) Character.toUpperCase('a') (b) Character.isLetterOrDigit('#')

Choose the correct answers to the questions from the given options. (Do not copy the questions, write only the correct answers.)

1(i)2022

MCQEasy1 mark

Return data type of isLetter(char) is __________.

(a)Boolean
(b)boolean
(c)bool
(d)char

1(ii)2022

MCQEasy1 mark

Method that converts a character to uppercase is __________.

(a)toUpper()
(b)ToUpperCase()
(c)toUppercase()
(d)toUpperCase(char)

1(iv)2022

MCQEasy1 mark

Corresponding wrapper class of float data type is __________.

(a)FLOAT
(b)float
(c)Float
(d)Floating

1(v)2022

MCQEasy1 mark

__________ class is used to convert a primitive data type to its corresponding object.

(a)String
(b)Wrapper
(c)System
(d)Math