Question 1 of 25
Hints left: 3
Q1
Which of these method of class String is used to remove leading and trailing whitespaces?
Q2
What will be the output of the following Java code? class output { public static void main(String args[]) { StringBuffer s1 = new StringBuffer("Hello"); s1.insert(1,"Java"); System.out.println(s1); } }
Q3
Which of the following are incorrect form of StringBuffer class constructor?
Q4
How many objects will be created? String a = new String("Examveda"); String b = new String("Examveda"); String c = "Examveda"; String d = "Examveda";
Q5
The class string belongs to ................. package.
Q6
What will be output? String S1 = "S1 ="+ "123"+"456"; String S2 = "S2 ="+(123+456);
Q7
What will be the output of the following Java code? class output { public static void main(String args[]) { String c = "Hello i love java"; boolean var; var = c.startsWith("hello"); System.out.println(var); } }
Q8
String str1 = "Kolkata".replace('k', 'a'); In the above statement, the effect on string Kolkata is
Q9
What will be the output of the following program code? public class Test{ public static void main(String args[]){ String s = "what"; StringBuffer sb = new StringBuffer("what"); System.out.print(sb.equals(s)+","+s.equals(sb)); } }
Q10
What will be the output of the following Java code? class output { public static void main(String args[]) { StringBuffer sb=new StringBuffer("Hello"); sb.replace(1,3,"Java"); System.out.println(sb); } }
Q11
What will be the output of the following Java program? class output { public static void main(String args[]) { String s1 = "Hello"; String s2 = s1.replace('l','w'); System.out.println(s2); } }
Q12
Which of these methods is used to compare a specific region inside a string with another specific region in another string?
Q13
Which of these methods can be used to convert all characters in a String into a character array?
Q14
What will be the output of the following Java program? class output { public static void main(String args[]) { String a = "hello i love java"; System.out.println(a.indexOf('e')+" "+a.indexOf('a')+" "+a.lastIndexOf('l')+" "+a.lastIndexOf('v')); } }
Q15
What will be the output of the following Java code? class output { public static void main(String args[]) { String s1 = "Hello i love java"; String s2 = new String(s1); System.out.println((s1 == s2) + " " + s1.equals(s2)); } }
Q16
What is the output of the following println statement? String str1 = "Hellow"; System.out.println(str1.indexOf('t'));
Q17
What will be the output of the following Java program? class output { public static void main(String args[]) { String c = " Hello World "; String s = c.trim(); System.out.println("\"+s+""""\""""""); } }"""
Q18
Which of these class is used to create an object whose character sequence is mutable?
Q19
Determine output: public class Test{ public static void main(String args[]){ String str = null; if(str.length() == 0){ System.out.print("1"); } else if(str == null){ System.out.print("2"); } else{ System.out.print("3"); } } }
Q20
Which of the following statement is correct?
Q21
What will be the output of the following program? public class Test{ public static void main(String args[]){ String str1 = "one"; String str2 = "two"; System.out.println(str1.concat(str2)); } }
Q22
What will be the output? public class Test{ public static void main(String args[]){ Object myObj = new String[]{"one", "two", "three"}; { for(String s : (String[])myObj) System.out.print(s + "."); } } }
Q23
How many Constructor String class have?
Q24
What will be the output? public class Test{ public static void main (String[] args){ String test = "a1b2c3"; String[] tokens = test.split("\\d"); for(String s: tokens) System.out.print(s); } }
Q25
Which of these data type value is returned by equals() method of String class?