The GATE Grind

GATE Digital Logic: Number Representation and Arithmetic – Previous Year Questions

11 GATE previous year questions on Number Representation and Arithmetic (Digital Logic, Computer Science) with answers and explanations, from every paper.

  1. GATE 2017 CS Q17 (1 mark, Multiple choice) – The n-bit fixed-point representation of an unsigned real number X uses f bits for the fraction part. Let i = n - f. The range of decimal values for X…
  2. GATE 2017 CS Q19 (1 mark, Multiple choice) – When two 8-bit numbers A 7 A 0 and B 7 B 0 in 2's complement representation (with A 0 and B 0 as the least significant bits) are added using a…
  3. GATE 2016 CS Q17 (1 mark, Numerical answer) – The 16-bit 2's complement representation of an integer is 1111 1111 1111 0101; its decimal representation is .
  4. GATE 2019 CS Q14 (1 mark, Multiple choice) – In 16-bit 2's complement representation, the decimal number -28 is:
  5. GATE 2019 CS Q18 (1 mark, Multiple choice) – Consider Z=X-Y, where X, Y and Z are all in sign-magnitude form. X and Y are each represented in n bits. To avoid overflow, the representation of Z…
  6. GATE 2025 CS (CS1) Q25 (1 mark, Multiple select) – The number -6 can be represented as 1010 in 4-bit 2's complement representation. Which of the following is/are CORRECT 2's complement…
  7. GATE 2024 CS (CS2) Q49 (2 marks, Multiple select) – Which of the following is/are EQUAL to 224 in radix-5 (i.e., base-5) notation?
  8. GATE 2023 CS Q32 (1 mark, Numerical answer) – A particular number is written as 132 in radix-4 representation. The same number in radix-5 representation is .
  9. GATE 2022 CS Q18 (1 mark, Multiple choice) – Let R1 and R2 be two 4-bit registers that store numbers in 2’s complement form. For the operation R1+R2, which one of the following values of R1 and…
  10. GATE 2021 CS Q16 (1 mark, Multiple choice) – Let the representation of a number in base 3 be 210. What is the hexadecimal representation of the number?
  11. GATE 2021 CS Q34 (1 mark, Numerical answer) – Consider the following representation of a number in IEEE 754 single-precision floating point format with a bias of 127. S: 1 E: 10000001 F:…