NLASO Assistant Maintenance Engineer October 2025 – Written question & solution

Questions from the NLASO Assistant Maintenance Engineer recruitment exam, October 2025 – Written, shared by the candidates who sat it. The paper: 16 written questions. So far 16 written questions have been shared. Topics include Computer Networks, Microprocessor, Emerging Technology, Network Security and Computer Architecture.

Written (16)

  1. Write down the Role of Validation set in ML.
  2. Straight through connection vs Crossover connection.
  3. Explain the decision tree model in Machine Learning.
  4. Write the layers of the OSI reference model from bottom to top.
  5. What is Star vs Mesh Topology?
  6. What is exfiltration?
  7. Write down the DNS function.
  8. Given IP address 10.0.0.100 and Subnet mask 255.255.240.0 which is network address?
  9. Core vs thread in networking?
  10. Performance of CMOS battery?
  11. What is Packet Filter of Firewall?
  12. What does BJT stand for?
  13. How many terminals does a BJT have?
  14. In an NPN transistor, the current flows from ______
  15. Which BJT configuration gives maximum voltage gain?
  16. Collector current (Ic) is related to base current (Ib) by ______