The pass number for each of the following activities Object code generation…

Let's break down when each of the four activities occurs:

1. Literals added to literal table (Pass 1):

   • During the first pass, the assembler scans the entire program line-by-line to build the framework. When it encounters a literal (like =5 or ='X'), it assigns a memory slot for it and adds it to the Literal Table (LITTAB).

   • Occurs in: Pass 1

2. Address resolution of local symbols (Pass 1):

   • Pass 1 is primarily dedicated to defining symbols and labels. The assembler maintains a Location Counter (LC) to track addresses. When it sees a symbol definition (e.g., LOOP: MOV AX, BX), it resolves the address of that local symbol and stores it in the Symbol Table (SYMTAB).

   • Occurs in: Pass 1

3. Object code generation (Pass 2):

   • Once the symbol and literal tables are fully populated with exact memory addresses after Pass 1, the assembler goes through the code a second time. It translates the mnemonics (like MOV, ADD) into their respective binary opcodes and fills in the resolved operand addresses from the tables to generate the final Object Code.

   • Occurs in: Pass 2

4. Listing printed (Pass 2):

   • The assembly listing file contains the original source code side-by-side with its generated object code and addresses. Since the object code isn't ready until Pass 2, the listing can only be printed during Pass 2.

   • Occurs in: Pass 2

Matching the Sequence:

• Object code generation ⟶ 2

• Literals added to literal table ⟶ 1

• Listing printed ⟶ 2

• Address resolution of local symbols ⟶ 1

The resulting sequence is 2, 1, 2, 1.