String Multiple Choice Questions (MCQs) PDF Download - 20

Operator used for concatenation of two or more strings is

1. +
2. +='
3. &
4. ||

Functions in C# are a means of providing blocks of code that can

1. be executed at any point in the an application
2. decrease the efficiency of the compiler
3. not be resued
4. have some parameters

Choose the correct output for the given code
static void Main() { int[] nums = { 1, 2, 3, 4, 5 }; Console.Write("Original order: "); foreach(int i in nums) Console.Write(i + " "); Array.Reverse(nums); Console.Write("Reversed order: "); foreach(int i in nums) Console.Write(i + " "); Console.WriteLine(); }

1. run time error
2. 5,4,3,2,1
3. compile time error
4. 1,2,3,4,5

Choose the correct statement

1. Information is never lost during narrowing conversions.
2. The CInteger() function can be used to convert a Single to an Integer.
3. Widening conversions take place automatically.
4. Assigning an Integer to an Object type is known as Unboxing.

The complex data types used in C# are

1. Enum
2. Struct
3. Arrays
4. All of the above