C Sharp - Control Instructions Questions and Answers

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C# Control Instructions questions with answers help programmers understand how to manage program flow using decision-making and looping statements. Key concepts include if-else, switch-case, for, while, and foreach loops. Practicing programming questions and answers with explanations strengthens logical thinking and coding efficiency. These C# aptitude questions are regularly asked in placement tests and technical interviews by companies such as Infosys, Accenture, and Wipro. Learning control instructions through practical examples prepares you for both academic exams and real-world programming challenges.

Questions on control structures in C#. Pair with C# loops and C# operators

C Sharp - Control Instructions

Showing 10 of 14 questions

1. What does the following C#.NET code snippet will print? int i = 0, j = 0; label:     i++;     j+=i; if (i < 10) {     Console.Write(i +" ");     goto label; }

  • Prints 1 to 9
  • Prints 0 to 8
  • Prints 2 to 8
  • Prints 2 to 9
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2. Which of the following is the correct output for the C#.NET program given below? int i = 20 ; for( ; ; ) {     Console.Write(i + " ");     if (i >= -10)         i -= 4;     else         break; }

  • 20 16 12 84 0 -4 -8
  • 20 16 12 8 4 0
  • 20 16 12 8 4 0 -4 -8 -12
  • 16 12 8 4 0
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3. Which of the following statements is correct?

  • It is not possible to extend the if statement to handle multiple conditions using the else-if arrangement.
  • The switch statement can include any number of case instances with two case statements having the same value.
  • A jump statement such as a break is required after each case block excluding the last block if it is a default statement.
  • The if statement selects a statement for execution based on the value of a Boolean expression.
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4. What will be the output of the C#.NET code snippet given below? int val; for (val = -5; val <= 5; val++) {     switch (val)     {         case 0:             Console.Write ("India");             break;     }         if (val > 0)         Console.Write ("B");     else if (val < 0)         Console.Write ("X"); }

  • XXXXXIndia
  • IndiaBBBBB
  • XXXXXIndiaBBBBB
  • BBBBBIndiaXXXXX
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5. What will be the output of the C#.NET code snippet given below? char ch = Convert.ToChar ('a' | 'b' | 'c'); switch (ch) {     case 'A':     case 'a':     Console.WriteLine ("case A | case a");     break;         case 'B':     case 'b':     Console.WriteLine ("case B | case b");     break;         case 'C':     case 'c':     case 'D':     case 'd':     Console.WriteLine ("case D | case d");     break; }

  • case A | case a
  • case B | case b
  • case D | case d
  • Compile Error
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6. Which of the following can be used to terminate a while loop and transfer control outside the loop?     exit while     continue     exit statement     break     goto

  • 1, 3
  • 2, 4
  • 3, 5
  • 4, 5
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7. The C#.NET code snippet given below generates ____ numbers series as output? int i = 1, j = 1, val; while (i < 25) {     Console.Write(j + " ");     val = i + j;     j = i;     i = val; }

  • Prime
  • Fibonacci
  • Palindrome
  • Odd
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8. Which of the following statements are correct about the C#.NET code snippet given below? if (age > 18 && no < 11)     a = 25;     The condition no < 11 will be evaluated only if age > 18 evaluates to True.     The statement a = 25 will get executed if any one condition is True.     The condition no < 11 will be evaluated only if age > 18 evaluates to False.     The statement a = 25 will get executed if both the conditions are True.     && is known as a short circuiting logical operator. A.     1, 3

  • 2, 5
  • 1, 4, 5
  • 3, 4, 5
  • None of these
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9. Which of the following statements are correct?     A switch statement can act on numerical as well as Boolean types.     A switch statement can act on characters, strings and enumerations types.     We cannot declare variables within a case statement if it is not enclosed by { }.     The foreach statement is used to iterate through the collection to get the desired information and should be used to change the contents of the collection to avoid unpredictable side effects.     All of the expressions of the for statement are not optional.

  • 1, 2
  • 2, 3
  • 3, 5
  • 4, 5
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10. What will be the output of the C#.NET code snippet given below? int i = 2, j = i; if (Convert.ToBoolean((i | j & 5) & (j - 25 * 1)))     Console.WriteLine(1); else     Console.WriteLine(0);

  • 0
  • 1
  • Compile Error
  • Run time Error
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