Juniper Networks Interview Experience

ROUND 1: ONLINE TEST

Platform: Hackerrank

Duration of test: 90 min

Number of questions: 33 ( 32 MCQs + 1 code challenge )

Topics:

• Aptitude ( Time and Work, Number System, Data Interpretations, Cryptograms, Problems on Ages, Percentages, Profit and Loss)
• Technical ( Computer Networking, DBMS, Operating System, HTML/CSS )
• Programming ( Determining the outputs )

ROUND 2: TECHNICAL ROUND

• Tell me about yourself.
• This round primarily focused on projects, technical questions related to Operating Systems,
• Computer Networking, DBMS, and Programming within the context of your mini and minor
• projects. Ex: Given that both of my projects were in the ML domain, I encountered questions related to Python. This included the distinctions between dictionaries and lists, as well as real-world scenarios for using Python and C++.
• Explain your minor and mini-project in detail.
• What were your specific contributions to these
• projects? Explain the OSI or TCP/IP model in detail.
• List the devices used across all seven layers of the TCP/IP model. Explain the concept of race conditions.
• Topics like Inheritance in object-oriented programming, sorting algorithms like bubble
• sort and quick sort, graph traversal algorithms like Dijkstra’s and Bellman-Ford’s, and the logic behind generating the Tribonacci series were asked.
• Functions and protocols associated with the transport and network layers. Puzzles

ROUND 3: TECHNICAL ROUND

• Tell me about yourself.
• Router vs. Switch.
• Why do we use a Switch alongside a Router?
• A topology was designed based on which future questions were asked.
• When a packet is dispatched from the source to its destination. Does the packet traverse through a switch or a router? My response encompassed the local area network, the data link layer, and the network layer, leading to more questions about MAC addressing, IP addressing, ARP tables, and routing tables.
• The network was redesigned with addresses belonging to the same subnet. ( It’s not said. Need be identified by you). The question was, whether the packet is routed through a router or a switch. Why switch? Or why Router? Explain briefly.
• The network was again re-designed with addresses belonging to different subnets. ( Again you are supposed to identify the same). The same question, packet traverses through a router. Then why? A Switch ..Then why?
• Difference between private and public addressing.
• What are the special addresses?
• How exactly does NAT work? Explain NAT based on the previously discussed topology.
• Explain DHCP. How DORA works. ( How does a client discover DHCP servers, and when there are two DHCP
• servers in the same network, how does the client choose between them? Additionally, how does the client machine determine which DHCP server is the nearest?)
• What are VLANs? Why VLANs are used?
• What are wireless LANs? (Not an elaborated topic, though!)
• Routing protocols: OSPF, RIP
• Difference between TCP and UDP protocols.
• Explain 3-way handshaking.
• For real-time examples, which protocol is better suited, TCP or UDP? For instance, in the case of voice-over, and IPL streaming, do we need TCP or UDP?
• Lastly, some questions are based on the stuff mentioned in the resume, such as interests, and certifications.

ROUND 4: MANAGERIAL ROUND

• Tell me about yourself.
• Technical questions related to DHCP, Firewalls, and aspects of the projects mentioned.
• How did you develop your interest in networking?
• You prefer networking or programming.
• Why Juniper Networks.
• How many interview experiences have you had in the past?
• Did you get any offers?
• What if you receive an offer with a package higher than that of Juniper Networks? Asked if I was familiar with the role being offered. And how interested I am.
• Describe the job role.
• Few situational questions.

ROUND 5: HR ROUND

• How was your day today?
• Talk about your family.
• Strengths and weaknesses.
• How do you work with your weaknesses?
• What sparked your interest in networking? Why Juniper Networks.
• How many interview experiences have you had in the past? Did you get any offers?
• Why should we hire you?