Q.1
Which of these methods of class String is used to extract a substring from a String object?
  • a) substring()
  • b) Substring()
  • c) SubString()
  • d) None of the mentioned
Q.2
What will be the output of the following C# code snippet? class Program{ static void Main(string[] args) { String s1 = "one"; String s2 = string.Concat(s1 + " " + "two"); Console.WriteLine(s2); Console.ReadLine(); }}
  • a) one
  • b) two
  • c) one two
  • d) two one
Q.3
Which of these methods of class String is used to remove leading and trailing whitespaces?
  • a) startsWith()
  • b) TrimEnd()
  • c) Trim()
  • d) TrimStart()
Q.4
What will be the output of the following C# code snippet? class Program{ static void Main(string[] args) { String c = " Hello World "; String s = c.Trim(); Console.WriteLine("""+s+"""); Console.ReadLine(); }}
  • a) ” Hello World ”
  • b) “HelloWorld”
  • c) “Hello World”
  • d) “Hello”
Q.5
What will be the output of the following C# code snippet? class Program { static void Main(string[] args) { String s1 = "CSHARP"; String s2 = s1.Replace('H','L'); Console.WriteLine(s2); Console.ReadLine(); } }
  • a) CSHAP
  • b) CSHP
  • c) CSHALP
  • d) CSHP
Q.6
What will be the output of the following C# code snippet? class Program { static void Main(string[] args) { String s1 = "Hello World"; String s2 = s1.Substring(4); Console.WriteLine(s2); Console.ReadLine(); } }
  • a) Hello
  • b) Hell
  • c) H
  • d) Hello World
Q.7
What will be the output of the following C# code snippet? class Program { static void Main(string[] args) { String s = "Hello World"; int i = s.IndexOf('o'); int j = s.LastIndexOf('l'); Console.WriteLine(i + " " + j); Console.ReadLine(); } }
  • a) 9 5
  • b) 4 9
  • c) 9 0
  • d) 9 4
Q.8
What will be the output of the following C# code snippet? class Program{ static void Main(string[] args) { String c = "i love Csharp"; bool a; a = c.StartsWith("I"); Console.WriteLine(a); Console.ReadLine(); }}
  • a) true
  • b) false
  • c) 0
  • d) 1
Q.9
What will be the output of the following C# code snippet? class Program{ static void Main(string[] args) { String []chars = {"z", "x", "y", "z", "y"}; for (int i =i < chars.Length; ++i) for (int j = i +j < chars.Length; ++j) if(chars[i].CompareTo(chars[j]) == Console.WriteLine(chars[j]); Console.ReadLine(); }}
  • a) zx
  • b) xy
  • c) zy
  • d) yz
Q.10
What will be the output of the following C# code snippet? static void main(String args[]) { char chars[] = {'a', 'b', 'c'}; String s = new String(chars); Console.WriteLine(s); }
  • a) a
  • b) b
  • c) ab
  • d) abc
Q.11
What will be the output of the following C# code snippet? static void Main(string[] args) { string s = " i love you"; Console.WriteLine(s.IndexOf('l') + " " + s.lastIndexOf('o') + " " + s.IndexOf('e')); Console.ReadLine(); }
  • a) 3 5 7
  • b) 4 5 6
  • c) 3 9 6
  • d) 2 4 6
0 h : 0 m : 1 s