R4RIN – MCQs, Mock Tests

A variable which is declared inside a method is called a________variable

1. Serial
2. Local
3. Private
4. Static

✅ Correct Answer: 2

Which is the String method used to compare two strings with each other ?

1. Compare To()
2. Compare()
3. Copy()
4. ConCat()

✅ Correct Answer: 2

Minimum and Maximum range of values supported by ‘float’ data type are ?

1. 1.5 * 10 ^-40 to 3.4 * 10 ^38
2. 1.5 * 10 ^-40 to 3.4 * 10 ^38
3. 1.5 * 10 ^-45 to 3.4 * 10 ^38
4. 1.5 * 10 ^-45 to 3.4 * 10 ^37

✅ Correct Answer: 3

Which datatype should be more preferred for storing a simple number like 35 to improve execution speed of a program?

1. sbyte
2. short
3. int
4. long

✅ Correct Answer: 1

What will be output of the following conversion ? static void Main(string[] args) { char a = 'A'; string b = "a"; Console.WriteLine(Convert.ToInt32(a)); Console.WriteLine(Convert.ToInt32(Convert.Tochar(b))); Console.ReadLine(); }

1. 1, 97
2. 65, 97
3. 65, 97
4. 97, 1

✅ Correct Answer: 3

Scope of variable is related to definition of variable as: 1. Region of code within which variable value is valid and hence can be accessed. 2. No, relation with region where variable is declared its value is valid in entire scope.

1. a
2. b
3. a, b
4. None of the mentioned

✅ Correct Answer: 1

Type of Conversion in which compiler is unable to convert the datatype implicitly is ?

1. ushort to long
2. int to uint
3. ushort to long
4. byte to decimal

✅ Correct Answer: 2

Select output of the given set of Code : static void Main(string[] args) { String name = "r4r"; Console.WriteLine("Good Morning" + name); }

1. r4r
2. Good Morning
3. Good Morning r4r
4. Good Morning name

✅ Correct Answer: 3

Which of the following is NOT an Integer?

1. Char
2. Byte
3. Integer
4. Short

✅ Correct Answer: 1

Which of the following are value types? 1.Integer 2.Array 3.Single 4.String 5.Long

1. 1, 2, 5
2. 1, 3, 5
3. 2, 4
4. 3, 5

✅ Correct Answer: 2

Which of the following statements is correct?

1. When a class inherits an interface it inherits member definitions as well as its implementations.
2. An interface cannot contain the signature of an indexer.
3. Interfaces members are automatically public.
4. To implement an interface member, the corresponding member in the class must be public as well as static.

✅ Correct Answer: 3

Which of the following can implement an interface? 1.Data 2.Class 3.Enum 4.Structure 5.Namespace

1. 1, 3
2. 2, 4
3. 3, 5
4. 4 only

✅ Correct Answer: 2