Given: public class Student { string sName; char grade; public static void main (String[] args) { Student s = new Student (); System.out.println ("\"" + s.sName + ":" + s.grade + "\""); } } What is…

Question

Options

• A[null:]
• B[:]
• C[null:null]
• D[null]

• A
  88% (14)
• B
  6% (1)
• D
  6% (1)

Explanation

Option A is correct because Java initializes instance variables to their type defaults: sName is a String (reference type), so it defaults to null, which when concatenated in a String expression prints literally as null; grade is a char (primitive type), so it defaults to '\u0000' (the null character), which renders as an invisible/empty character in output - producing "null:" (the brackets in the choices represent the printed double-quotes from "\").

Option B is wrong because it implies sName printed as empty, but a null String reference always concatenates as the text "null", not as an empty string. Option C is wrong because it assumes grade also prints as null, but that only happens with reference types - primitives like char have a numeric zero-equivalent default ('\u0000'), not null. Option D is wrong because it's missing the colon separator and omits the char value entirely.

Memory tip: Think "reference types get null, primitives get zero" - for char, zero means '\u0000' (invisible), not the word "null", so only the String side of : produces visible output.

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