Strings — Part 2 MCQs with Explanations

an int value is the correct answer to “The String method compareTo() returns”. This question is standard in competitive examination syllabi for Strings.

-1 is the correct answer to “What is the output of the following println statement? String str1 = "Hellow"; System.out.println(str1.indexOf('t'));”. This question is standard in competitive examination syllabi for Strings.

java.lang is the correct answer to “The class string belongs to ................. package.”. This question is standard in competitive examination syllabi for Strings.

abc is the correct answer to “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); } }”. This question is standard in competitive examination syllabi for Strings.

false,false is the correct answer to “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)); } }”. This question is standard in competitive examination syllabi for Strings.

one.two.three. is the correct answer to “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 + "."); } } }”. This question is standard in competitive examination syllabi for Strings.

An exception is thrown at runtime. is the correct answer to “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"); } } }”. This question is standard in competitive examination syllabi for Strings.

regionMatches() is the correct answer to “Which of these methods is used to compare a specific region inside a string with another specific region in another string”. This question is standard in competitive examination syllabi for Strings.

HJavaello is the correct answer to “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); } }”. This question is standard in competitive examination syllabi for Strings.

false is the correct answer to “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); } }”. This question is standard in competitive examination syllabi for Strings.

boolean is the correct answer to “Which of these data type value is returned by equals() method of String class”. This question is standard in competitive examination syllabi for Strings.

StringBuffer(int size , String str) is the correct answer to “Which of the following are incorrect form of StringBuffer class constructor”. This question is standard in competitive examination syllabi for Strings.

"Hello World" is the correct answer to “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+"\""); } }”. This question is standard in competitive examination syllabi for Strings.

1 14 8 15 is the correct answer to “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')); } }”. This question is standard in competitive examination syllabi for Strings.

StringBuffer() is the correct answer to “Which of these class is used to create an object whose character sequence is mutable”. This question is standard in competitive examination syllabi for Strings.

false true is the correct answer to “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)); } }”. This question is standard in competitive examination syllabi for Strings.

hewwo is the correct answer to “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); } }”. This question is standard in competitive examination syllabi for Strings.

trim() is the correct answer to “Which of these method of class String is used to remove leading and trailing whitespaces”. This question is standard in competitive examination syllabi for Strings.

HJavalo is the correct answer to “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); } }”. This question is standard in competitive examination syllabi for Strings.

sb1.append("abc"); s1 = s1.concat("abc") is the correct answer to “In the following Java code, which code fragment should be inserted at line 3 so that the output will be: "123abc 123abc"? 1. StringBuilder sb1 = new StringBuilder("123"); 2. String s1 = "123"; 3. // insert code here 4. System.out.println(sb1 + " " + s1);”. This question is standard in competitive examination syllabi for Strings.

startsWith() is the correct answer to “Which of these methods of class String is used to check whether a given object starts with a particular string literal”. This question is standard in competitive examination syllabi for Strings.

length() is the correct answer to “Which of these method of class StringBuffer is used to find the length of current character sequence”. This question is standard in competitive examination syllabi for Strings.

llo i l is the correct answer to “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); } }”. This question is standard in competitive examination syllabi for Strings.

java.lang is the correct answer to “Which of these class is superclass of String and StringBuffer class”. This question is standard in competitive examination syllabi for Strings.

reverse() is the correct answer to “Which of this method of class StringBuffer is used to reverse sequence of characters”. This question is standard in competitive examination syllabi for Strings.

onetwo is the correct answer to “What will s2 contain after following lines of Java code? StringBuffer s1 = "one"; StringBuffer s2 = s1.append("two")”. This question is standard in competitive examination syllabi for Strings.

append() is the correct answer to “Which of this method of class StringBuffer is used to concatenate the string representation to the end of invoking string”. This question is standard in competitive examination syllabi for Strings.

value greater than zero is the correct answer to “What is the value returned by function compareTo() if the invoking string is greater than the string compared”. This question is standard in competitive examination syllabi for Strings.

abc is the correct answer to “What will be the output of the following Java program? class String_demo { public static void main(String args[]) { char chars[] = {'a', 'b', 'c'}; String s = new String(chars); System.out.println(s); } }”. This question is standard in competitive examination syllabi for Strings.

length() is the correct answer to “Which of this method of class StringBuffer is used to get the length of the sequence of characters”. This question is standard in competitive examination syllabi for Strings.

one two is the correct answer to “What will be the output of the following Java program? class output { public static void main(String args[]) { String s1 = "one"; String s2 = s1 + " two"; System.out.println(s2); } }”. This question is standard in competitive examination syllabi for Strings.

substring() is the correct answer to “Which of this method of class String is used to extract a substring from a String object”. This question is standard in competitive examination syllabi for Strings.

Hell is the correct answer to “What will be the output of the following Java program? class output { public static void main(String args[]) { String s1 = "Hello World"; String s2 = s1.substring(0 , 4); System.out.println(s2); } }”. This question is standard in competitive examination syllabi for Strings.

e is the correct answer to “What will be the output of the following Java code? class output { public static void main(String args[]) { char ch; ch = "hello".charAt(1); System.out.println(ch); } }”. This question is standard in competitive examination syllabi for Strings.

BCD is the correct answer to “What will be the output of the following Java program? class String_demo { public static void main(String args[]) { int ascii[] = { 65, 66, 67, 68}; String s = new String(ascii, 1, 3); System.out.println(s); } }”. This question is standard in competitive examination syllabi for Strings.

4 9 is the correct answer to “What will be the output of the following Java program? class output { public static void main(String args[]) { String s = "Hello World"; int i = s.indexOf('o'); int j = s.lastIndexOf('l'); System.out.print(i + " " + j); } }”. This question is standard in competitive examination syllabi for Strings.

ello is the correct answer to “What is the string contained in s after following lines of Java code? StringBuffer s new StringBuffer("Hello"); s.deleteCharAt(0);”. This question is standard in competitive examination syllabi for Strings.

1 is a digit a is a lower case Letter is the correct answer to “What will be the output of the following Java program? class output { class output { public static void main(String args[]) { char c[]={'A', '1', 'b' ,' ' ,'a' , '0'}; for (int i = 0; i < 5; ++i) { 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++; } } }”. This question is standard in competitive examination syllabi for Strings.

length() is the correct answer to “Which of this method of class String is used to obtain a length of String object”. This question is standard in competitive examination syllabi for Strings.

a is a lower case Letter A is an upper case Letter is the correct answer to “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; } } }”. This question is standard in competitive examination syllabi for Strings.