gs gs128 Java String Handling - Java Character Extraction - Quiz No.1
gs gs128 Java Quiz
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Question 1: Which of these method of class String is used to extract more than one character at a time a String object?
getchars()
GetChars()
Getchars()
getChars()
Question 2: Which of these methods is an alternative to getChars() that stores the characters in an array of bytes?
getBytes()
GetByte()
giveByte()
Give Bytes()
Question 3: In the following Java code, what can directly access and change the value of the variable name?
package test; class Target { public String name = "hello"; }
any class
only the Target class
any class in the test package
any class that extends Target
Question 4: What will be the output of the following Java code?
public class Boxer1 { Integer i; int x; public Boxer1(int y) { x = i+y; System.out.println(x); } public static void main(String[] args) { new Boxer1 (new Integer(4)); } }
The value “4” is printed at the command line
Compilation fails because of an error in line
A NullPointerException occurs at runtime
An IllegalStateException occurs at runtime
Question 5: Which of these methods can be used to convert all characters in a String into a character array?
charAt()
both getChars() & charAt()
both toCharArray() & getChars()
all of the mentioned
Question 6: What will be the output of the following Java code?
class output { public static void main(String args[]) { String c = "Hello i love java"; int start = 2; int end = 9; char s[]=new char[end-start]; c.getChars(start,end,s,0); System.out.println(s); } }
Hello, i love java
i love ja
lo i lo
llo i l
Question 8: What will be the output of the following Java code?
class output { public static void main(String args[]) { char c[]={'a', '1', 'b' ,' ' ,'A' , '0'}; for (int i = 0; i < 5; ++i) { if(Character.isDigit(c[i])) System.out.println(c[i]+" is a digit"); if(Character.isWhitespace(c[i])) System.out.println(c[i]+" is a Whitespace character"); if(Character.isUpperCase(c[i])) System.out.println(c[i]+" is an Upper case Letter"); if(Character.isLowerCase(c[i])) System.out.println(c[i]+" is a lower case Letter"); i=i+3; } } } a is a lower case Letter is White space character b is a lower case Letter is White space character a is a lower case Letter A is an upper case Letter a is a lower case Letter 0 is a digit
