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A simple two-pass assembler does which of the following in the first pass.
- a)It allocates space for the literals
- b)Calculates total length of the program
- c)Symbol table is built for the symbols and their value
- d)All of the mentioned
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A simple two-pass assembler does which of the following in the first p...
A two-pass assembler. Each pass scans the program, the first pass generates the symbol table and the second pass generates the machine code…
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A simple two-pass assembler does which of the following in the first p...
Understanding the Two-Pass Assembler
A two-pass assembler is a program that translates assembly language code into machine code. Its operation is divided into two main phases, each with distinct tasks. The first pass is crucial for setting up the necessary structure for the assembly process.
Key Functions of the First Pass
- Symbol Table Construction:
During the first pass, the assembler scans the entire source code to identify all the symbols (labels, variables, etc.). It builds a symbol table that records each symbol and its corresponding address or value.
- Literal Space Allocation:
The assembler identifies literals (constant values) used in the program and allocates space for them. This ensures that when the program is executed, there is a predefined area in memory for these constants.
- Program Length Calculation:
The assembler computes the total length of the program, which is essential for memory allocation. This calculation helps in understanding how much memory will be required for the entire code segment.
Conclusion: All Functions are Executed
In the first pass, all of the above functions are performed simultaneously. Therefore, the correct answer is option 'D': **All of the mentioned**. The assembler needs to gather all necessary information to facilitate the translation process in the second pass, where actual machine code is generated based on the data collected in the first pass.
In summary, the first pass of a two-pass assembler is a foundational step that prepares the assembler to effectively translate assembly language into machine code in the subsequent pass.
A two-pass assembler is a program that translates assembly language code into machine code. Its operation is divided into two main phases, each with distinct tasks. The first pass is crucial for setting up the necessary structure for the assembly process.
Key Functions of the First Pass
- Symbol Table Construction:
During the first pass, the assembler scans the entire source code to identify all the symbols (labels, variables, etc.). It builds a symbol table that records each symbol and its corresponding address or value.
- Literal Space Allocation:
The assembler identifies literals (constant values) used in the program and allocates space for them. This ensures that when the program is executed, there is a predefined area in memory for these constants.
- Program Length Calculation:
The assembler computes the total length of the program, which is essential for memory allocation. This calculation helps in understanding how much memory will be required for the entire code segment.
Conclusion: All Functions are Executed
In the first pass, all of the above functions are performed simultaneously. Therefore, the correct answer is option 'D': **All of the mentioned**. The assembler needs to gather all necessary information to facilitate the translation process in the second pass, where actual machine code is generated based on the data collected in the first pass.
In summary, the first pass of a two-pass assembler is a foundational step that prepares the assembler to effectively translate assembly language into machine code in the subsequent pass.
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A simple two-pass assembler does which of the following in the first pass.a)It allocates space for the literalsb)Calculates total length of the programc)Symbol table is built for the symbols and their valued)All of the mentionedCorrect answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about A simple two-pass assembler does which of the following in the first pass.a)It allocates space for the literalsb)Calculates total length of the programc)Symbol table is built for the symbols and their valued)All of the mentionedCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A simple two-pass assembler does which of the following in the first pass.a)It allocates space for the literalsb)Calculates total length of the programc)Symbol table is built for the symbols and their valued)All of the mentionedCorrect answer is option 'D'. Can you explain this answer?.
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