JAVA MCQs - CSE MCQs Questions and Answers

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Which of these is a process of converting a simple data type into a class?

type wrapping

type conversion

type casting

None of the Mentioned

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Which of these is a super class of wrappers Double & Integer?

Long

Digits

Float

Number

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Which of these is wrapper for simple data type float?

float

double

Float

Double

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Which of the following is method of wrapper Float for converting the value of an object into byte?

bytevalue()

byte bytevalue()

Bytevalue()

Byte Bytevalue()

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Which of these methods is used to check for infinitely large and small values?

isInfinite()

isNaN()

Isinfinite()

IsNaN()

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Which of the following package stores all the simple data types in java?

lang

java

util

java.packages

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Which of these is a wrapper for data type int?

Integer

Long

Byte

Both a & b

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Which of the following methods is a method of wrapper Integer for obtaining hash code for the invoking object?

int hash()

int hashcode()

int hashCode()

Integer hashcode()

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Which of these is a super class of wrappers Long, Character & Integer?

Long

Digits

Float

Number