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38 network test engineer interview questions shared by candidates

Describe the values of a hash that is presented to you. How many times have you had success from an external Pen test? can you explain what nbns poisoning is and how it can be leveraged on beneficial test? so how does TCP work? What port does ICMP use? how does a ping work? How does traceroute work? what happens when they acknowledge is not responded to you by the server? Describe the pen testing process. What is arp spoofing? why do you use it? How do you change you DNS settings in Windows/Linux? How does DNS work? What is recursive DNS? How does Pass the Hash work? What is LM Hash? What is NTLM Hash? Why do we use it? What is Net-NTLM Hash? What is silver ticketing What is Kerberoasting How do you bypass firewall rules with nmap by specifying the port? How does Token impersonation work? Why do we send a NULL byte in Web app pentesting? What is the difference between Encoding, Hashing, and Encryption? What is a salt why do we use it? what is the difference between MTLS and TLS? Is TLS symmetric or Asymmetric?
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Senior Network Penetration Tester

Interviewed at Spirent Communications

3.7★
Mar 17, 2023

Describe the values of a hash that is presented to you. How many times have you had success from an external Pen test? can you explain what nbns poisoning is and how it can be leveraged on beneficial test? so how does TCP work? What port does ICMP use? how does a ping work? How does traceroute work? what happens when they acknowledge is not responded to you by the server? Describe the pen testing process. What is arp spoofing? why do you use it? How do you change you DNS settings in Windows/Linux? How does DNS work? What is recursive DNS? How does Pass the Hash work? What is LM Hash? What is NTLM Hash? Why do we use it? What is Net-NTLM Hash? What is silver ticketing What is Kerberoasting How do you bypass firewall rules with nmap by specifying the port? How does Token impersonation work? Why do we send a NULL byte in Web app pentesting? What is the difference between Encoding, Hashing, and Encryption? What is a salt why do we use it? what is the difference between MTLS and TLS? Is TLS symmetric or Asymmetric?

What is TCP Slow start? What is TCP congestion avoidance? What protocol does traceroute use? A device with a subnet of 255.255.0.0 expects how many neighbours could be reachable without going through a gateway? Name some reasons that someone may want to tunnel IPv4 packet streams.? Name as many tunnelling protocols as you can (IP/cellular)? Do you know what the software ‘Tor’ used for? How do denial of service attacks work? Give an example. Name some techniques that can be used to defend against them? A station wagon if filled with 1000 1GB thumb drives and is driving down the highway at 100km/h. What is its bandwidth? In Linux (or other Unix) filesystems, explain about "s" permission bit in a file? What are zombie processes? What does the Linux command ‘du’ do? Is Python code case sensitive? In Python, when will the else part of try-except-else be executed? and Python coding question: prints out the paths files within that directory as well as any files contained in contained directories.
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Network Product Test Specialist

Interviewed at XipLink

4.4★
Feb 27, 2021

What is TCP Slow start? What is TCP congestion avoidance? What protocol does traceroute use? A device with a subnet of 255.255.0.0 expects how many neighbours could be reachable without going through a gateway? Name some reasons that someone may want to tunnel IPv4 packet streams.? Name as many tunnelling protocols as you can (IP/cellular)? Do you know what the software ‘Tor’ used for? How do denial of service attacks work? Give an example. Name some techniques that can be used to defend against them? A station wagon if filled with 1000 1GB thumb drives and is driving down the highway at 100km/h. What is its bandwidth? In Linux (or other Unix) filesystems, explain about "s" permission bit in a file? What are zombie processes? What does the Linux command ‘du’ do? Is Python code case sensitive? In Python, when will the else part of try-except-else be executed? and Python coding question: prints out the paths files within that directory as well as any files contained in contained directories.

1)what is thrashing in OS 2) Write program for 8085 processor to add two no 3) what is semaphore ? 4).Name all network layers and protocol corresponding to each 5) what scheduler in OS. 6) Http protocol 7) what is paging (in OS) 8) Demon process 9) write a program to print IP address of system and it Status ( Active or inactive )
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Network Data Test Engineer

Interviewed at Cisco

4.1★
Oct 25, 2017

1)what is thrashing in OS 2) Write program for 8085 processor to add two no 3) what is semaphore ? 4).Name all network layers and protocol corresponding to each 5) what scheduler in OS. 6) Http protocol 7) what is paging (in OS) 8) Demon process 9) write a program to print IP address of system and it Status ( Active or inactive )

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