The GATE Grind

GATE Computer Organization and Architecture: ALU and Control Unit Design – Previous Year Questions

5 GATE previous year questions on ALU and Control Unit Design (Computer Organization and Architecture, Computer Science) with answers and explanations, from every paper.

  1. GATE 2016 CS Q43 (2 marks, Multiple choice) – Consider a carry lookahead adder for adding two n-bit integers, built using gates of fan-in at most two. The time to perform addition using this adder…
  2. GATE 2025 CS (CS2) Q39 (2 marks, Multiple choice) – For a direct-mapped cache, 4 bits are used for the tag field and 12 bits are used to index into a cache block. The size of each cache block is one…
  3. GATE 2025 CS (CS2) Q61 (2 marks, Numerical answer) – An application executes 6.4 108 number of instructions in 6.3 seconds. There are four types of instructions, the details of which are given in the…
  4. GATE 2025 CS (CS1) Q27 (1 mark, Multiple select) – A partial data path of a processor is given in the figure, where RA, RB, and RZ are 32-bit registers. Which option(s) is/are CORRECT related to…
  5. GATE 2024 CS (CS1) Q55 (2 marks, Numerical answer) – The baseline execution time of a program on a 2 GHz single core machine is 100 ns. The code corresponding to 90% of the execution time can be fully…