SSC IMD SA Mock 03 – Question 143

Which of the given options best describes the truthfulness of the following statements?
i) A compiler translates the entire source code line by line.
ii) Computer architecture refers to those attributes of a system visible to a programmer.
iii) The Reduced Instruction Set Architecture (RISC) computer organisation reduces the cycles per instruction at the cost of the number of instructions per program to increase the CPU performance.
iv) All the arithmetic and logical processing is performed by the Arithmetic Logic Unit under the supervision of a control unit.

• i-True, ii-True, iii-True, iv-True
• i-False, ii-True, iii-True, iv-True
• i-True, ii-False, iii-True, iv-True
• i-False, ii-False, iii-True, iv-False

Let us analyze the truthfulness of each statement:

i) False: A compiler translates the entire source program into machine code all at once before execution. An interpreter is the program that translates and executes code line by line.

ii) True: Computer architecture refers to attributes of a computer system that are visible to a programmer (such as instruction sets, data representations, addressing modes, and registers).

iii) True: RISC emphasizes simple, single-cycle instructions to reduce Cycles Per Instruction (\(\text{CPI} \approx 1\)). Although this may require more instructions per program compared to CISC, the significant reduction in CPI and cycle time results in faster overall CPU execution.

iv) True: In a central processing unit (CPU), all arithmetic (addition, subtraction) and logical (AND, OR, NOT) operations are carried out by the ALU under timing and control signals generated by the Control Unit.

Thus, statement i is False, ii is True, iii is True, and iv is True. The correct option is b).