Quiz on Interpolated Strings and String Manipulation in C#

What character must an interpolated string begin with?

• &

• @

• #

• $

Which method is used to convert a character to lowercase?

• char.LowerCase(ch)

• char.ConvertToLower(ch)

• char.ToUpper(ch)

• char.ToLower(ch)

What does the placeholder {sales} represent in an interpolated string?

• A constant

• A string literal

• A variable

• A method

Which format specifier is used to format a value as currency?

• C

• N

• F

• E

What does the method str.Trim() do?

• Converts a string to uppercase

• Removes leading and trailing spaces

• Removes all spaces from a string

• Replaces spaces with hyphens

Which method is used to insert a string into another string?

• Merge

• Add

• Insert

• Append

What is the default capacity of a StringBuilder object?

• 32 characters

• 16 characters

• 64 characters

• 128 characters

Which method would you use to check if a character is a punctuation mark?

• char.IsSpecial(ch)

• char.IsSymbol(ch)

• char.IsPunctuation(ch)

• char.IsMark(ch)

What does the method str.Contains(substring) return?

• True if the substring is found

• The length of the substring

• False if the substring is found

• The index of the substring

Which method is used to replace all occurrences of a character in a StringBuilder?

• Change

• Replace

• Update

• Modify