Answer b section reference understanding arrays any

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19. Answer: b Section Reference: Understanding Arrays Any array item can be directly accessed by using an index. In the .NET Framework, array indexes are zero-based, meaning that to access the first element of an array, you use the index 1; to access the second element, you use the index 2; and so on. In the given case, as you need to access the second element, you use the expression numbers[2].: You are writing code for a business application by using C#. You write the following statement to declare an array: int[] numbers = { 1, 2, 3, 4, 5 }; Now, you need to access the second item in this array (the number 2). Which of the following expression should you use? a) numbers[0] b) numbers[1] c) numbers[2] d) numbers[3] 20. Answer: b Section Reference: Understanding Operators The way unary increment and decrement operators work when used as part of an assignment can affect the results. In particular, when the unary increment and decrement operators are used as prefixes, the current value of the identifier is returned before the increment or decrement. On the other hand, when used as a suffix, the value of the identifier is returned after the increment or decrement is complete. When the first statement is executed, the value of x is 10. When the second statement is executed, the value of x and y are both 11. When the final statement is executed, the current value of y (11) is assigned to z before y is incremented by 1.: You are developing a C# program. You write the following code: int x = 10; int y = ++x; int z = y++; What will be the value of the variable z after all the above statements are executed?
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21. Answer: b Section Reference: Understanding Operators To evaluate this expression, you have to take into account operator precedence. The operators * and / have a higher precedence than + and -. You can also write this expression as 6 + ((4 * 4) / 2) - 1 This simplifies to, 6 + (8) - 1, resulting in 13.: You are developing a C# program. You write the following code line: int x = 6 + 4 * 4 / 2 - 1; What will be the value of the variable x after this statement is executed? 22. Answer: b Section Reference: Understanding Repetition Structures The control will enter the loop only once. At the end of the first iteration, the condition will fail (because the number 6 is greater than the number 5) and the loop will terminate.: You are developing a C# program. You write the following code: int i = 6; do { if (i == 3) break; Console.WriteLine("The value of i = {0}", i); i++; } while (i <= 5); How many times will the control enter the while loop? a) 0 b) 1 c) 2
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  • Spring '16
  • Antin
  • Control flow, Common Intermediate Language

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