�Standard output variable �out� is defined in which class?
1.Process
2.Void
3.System
4.Runtime
Posted Date:-2021-10-25 05:40:10
Output : package pkg; class output { public static void main(String args[]) { StringBuffer s1 = new StringBuffer("Hello"); s1.setCharAt(1, x); System.out.println(s1); } }1.Hexlo
2.xxxxx
3.xello
4.Hxllo
Posted Date:-2021-10-25 05:40:10
What is the string contained in s after following lines of code? StringBuffer s new StringBuffer(Hello); s.deleteCharAt(0);
1.ello
2.llo
3.Hell
4.Hel
Posted Date:-2021-10-25 05:40:10
What is the value returned by function compareTo() if the invoking string is less than the string compared?
1.value less than zero
2.value greater than zero
3.zero
4.None
Posted Date:-2021-10-25 05:40:10
What is the value returned by unction compareTo() if the invoking string is less than the string compared?
1.value less than zero
2.value greater than zero
3.zero
4.None
Posted Date:-2021-10-25 05:40:10
What will s2 contain after following lines of code? String s1 = one; String s2 = s1.concat(two)
1.one
2.two
3.twoone
4.onetwo
Posted Date:-2021-10-25 05:40:10
What will s2 contain after following lines of code? StringBuffer s1 = one; StringBuffer s2 = s1.append(two)
1.one
2.two
3.twoone
4.onetwo
Posted Date:-2021-10-25 05:40:10
Which of the following are incorrect form of StringBuffer class constructor?
1.StringBuffer(int size)
2.StringBuffer()
3.StringBuffer(int size , String str)
4.StringBuffer(String str)
Posted Date:-2021-10-25 05:40:10
Which of the following is correct way of importing an entire package pkg?
1.Import pkg.
2.Import pkg.*
3.import pkg.
4.import pkg.*
Posted Date:-2021-10-25 05:40:10
Which of the following is incorrect statement about packages?
1.A package can be renamed without renaming the directory in which the classes are stored.
2.Package defines a namespace in which classes are stored.
3.Java uses file system directories to store packages.
4.A package can contain other package within it.
Posted Date:-2021-10-25 05:40:10
Which of the following is method of System class is used to find how long a program takes to execute?
1.currenttimeMillis()
2.currentTimeMillis()
3.currenttime()
4.currentTime()
Posted Date:-2021-10-25 05:40:10
Which of the following is method of wrapper Float for converting the value of an object into byte?
1.byte bytevalue()
2.Bytevalue()
3.Byte Bytevalue()
4.bytevalue()
Posted Date:-2021-10-25 05:40:10
Which of the following is method of wrapper Integer for converting the value of an object into byte?
1.bytevalue()
2.Byte Bytevalue()
3.Bytevalue()
4.byte bytevalue()
Posted Date:-2021-10-25 05:40:10
Which of the following method of Process class can terminate a process?
1.void destroy()
2.void terminate()
3.void kill()
4.void exit()
Posted Date:-2021-10-25 05:40:10
Which of the following methods is a method of wrapper Integer for obtaining hash code for the invoking object?
1.Integer hashcode()
2.int hashCode()
3.int hashcode()
4.int hash()
Posted Date:-2021-10-25 05:40:10
Which of the following package stores all the simple data types in java?
1.java.packages
2.util
3.lang
4.java
Posted Date:-2021-10-25 05:40:10
Which of the following statement is correct?
1.replace() method replaces all the characters in invoking string with another character.
2.replace() replace() method replaces last occurrence of a character in invoking string with another character.
3.replace() method replaces only first occurances of a character in invoking string with another character.
4.replace() method replaces all occurrences of one character in invoking string with another character.
Posted Date:-2021-10-25 05:40:10
Which of the following statement is correct?
1.reverseall() method reverses all characters.
2.reverse() method reverses all characters.
3.replace() method replaces last occurrence of a character in invoking string with another character
4.replace() method replaces first occurrence of a character in invoking string with another character.
Posted Date:-2021-10-25 05:40:10
Which of these access specifiers can be used for a class so that it's members can be accessed by a different class in the different package?
1.Public
2.Private
3.Protected
4.None
Posted Date:-2021-10-25 05:40:10
Which of these class can encapsulate an entire executing program?
1.Process
2.Runtime
3.System
4.Void
Posted Date:-2021-10-25 05:40:10
Which of these class can generate an array which can increase and decrease in size automatically?
1.DynamicsList()
2.DynamicList()
3.ArrayList()
4.LinkedList()
Posted Date:-2021-10-25 05:40:10
Which of these class have only one field �TYPE�?
1.Process
2.Void
3.Runtime
4.System
Posted Date:-2021-10-25 05:40:10
Which of these class holds a collection of static methods and variables?
1.System
2.Void
3.Runtime
4.Process
Posted Date:-2021-10-25 05:40:10
Which of these class is superclass of String and StringBuffer class?
1.ArrayList
2.java.lang
3.java.util
4.None
Posted Date:-2021-10-25 05:40:10
Which of these class is used to create an object whose character sequence is mutable?
1.StringBuffer()
2.String()
3.Both of the mentioned
4.None
Posted Date:-2021-10-25 05:40:10
Which of these constructors is used to create an empty String object?
1.String()
2.String(void)
3.String(0)
4.None
Posted Date:-2021-10-25 05:40:10
Which of these data type value is returned by equals() method of String class?
1.boolean
2.char
3.int
4.All of the above
Posted Date:-2021-10-25 05:40:10
Which of these is a mechanism for naming and visibility control of a class and its content?
1.Object
2.Interface
3.Packages
4.None
Posted Date:-2021-10-25 05:40:10
Which of these is a super class of wrappers Long, Character & Integer?
1.Number
2.Long
3.Float
4.Digits
Posted Date:-2021-10-25 05:40:10
Which of these is a wrapper for data type int?
1.Byte
2.Long
3.Both a & b
4.Integer
Posted Date:-2021-10-25 05:40:10
Which of these is an an correct statement?
1.StringBuffer class is used to store string in a buffer for later use.
2.String object can point to some other reference of String variable.
3.String objects are immutable, they cannot be changed.
4.None
Posted Date:-2021-10-25 05:40:10
Which of these is wrapper for simple data type char?
1.Character
2.Float
3.String
4.Both a & c
Posted Date:-2021-10-25 05:40:10
Which of these is wrapper for simple data type float?
1.Double
2.double
3.float
4.Float
Posted Date:-2021-10-25 05:40:10
Which of these keywords is used to define packages in Java?
1.Pkg
2.Package
3.package
4.pkg
Posted Date:-2021-10-25 05:40:10
Which of these method can be used to increase the capacity of ArrayList object manually?
1.ensureCapacity()
2.increasecapacity()
3.increaseCapacity()
4.Capacity()
Posted Date:-2021-10-25 05:40:10
Which of these method of ArrayList class is used to obtain present size of an object?
1.index()
2.size()
3.capacity()
4.length()
Posted Date:-2021-10-25 05:40:10
Which of these method of class String is used to check weather a given object starts with a particular string literal?
1.Starts()
2.ends()
3.endsWith()
4.startsWith()
Posted Date:-2021-10-25 05:40:10
Which of these method of class String is used to compare two String objects for their equality?
1.Equals()
2.equals()
3.Isequal()
4.isequal()
Posted Date:-2021-10-25 05:40:10
Which of these method of class String is used to extract a single character from a String object?
1.charat()
2.charAt()
3.ChatAt()
4.CHARAT()
Posted Date:-2021-10-25 05:40:10
Which of these method of class String is used to obtain length of String object?
1.lengthof()
2.Sizeof()
3.get()
4.length()
Posted Date:-2021-10-25 05:40:10
Which of these method of class String is used to remove leading and trailing whitespaces?
1.startsWith()
2.Trim()
3.trim()
4.doTrim()
Posted Date:-2021-10-25 05:40:10
Which of these method of class StringBuffer is used to concatenate the string representation to the end of invoking string?
1.join()
2.append()
3.concat()
4.concatenate()
Posted Date:-2021-10-25 05:40:10
Which of these method of class StringBuffer is used to extract a substring from a String object
1.SubString()
2.substring()
3.Substring()
4.None
Posted Date:-2021-10-25 05:40:10
Which of these method of class StringBuffer is used to find the length of current character sequence?
1.capacity()
2.Capacity()
3.Length()
4.length()
Posted Date:-2021-10-25 05:40:10
Which of these methods can be used to obtain a static array from an ArrayList object?
1.Array()
2.toArray()
3.covertArray()
4.covertoArray()
Posted Date:-2021-10-25 05:40:10
Which of these methods is used to check for infinitely large and small values?
1.Isinfinite()
2.isInfinite()
3.IsNaN()
4.isNaN()
Posted Date:-2021-10-25 05:40:10
Which of these methods is used to compare a specific region inside a string with another specific region in another string?
1.regionMatches()
2.RegionMatches()
3.regionMatch()
4.match()
Posted Date:-2021-10-25 05:40:10
Which of these methods is used to obtain value of invoking object as a long?
1.Long longvalue()
2.long longValue()
3.Long Longvalue()
4.long value()
Posted Date:-2021-10-25 05:40:10
Which of these operators can be used to concatenate two or more String objects?
1.+
2.&
3.||
4.+=
Posted Date:-2021-10-25 05:40:10
Which of this access specifies can be used for a class so that its members can be accessed by a different class in the same package?
1.Protected
2.No Modifier
3.Public
4.All of the above
Posted Date:-2021-10-25 05:40:10