Juniper Networks Interview Questions, Process, and Tips

Coding test and algorithms

Q1. Web Technologies and system design
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Q1. Python and django related questions.
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Q1. Reverse a linked list Explain about the project
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Hacker earth online test with one coding question

Q1. Interview was good. Mostly qns are based on API and UI testing.
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Q2. API status code, debug
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Q1. Mainly on work skills and real time work experience
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Q1. This was with a manager round and this was mostly with personality and behaviour test
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Round duration - 45 minutes
Round difficulty - Easy

Technical Interview round with questions on DSA

Q1. 
Level Order Traversal of Binary Tree
Given a Binary Tree of integers, your task is to return the level order traversal of the tree.
Input:
The first line contains an integer 'T' which denotes the number...read more
Ans. 
Return the level order traversal of a Binary Tree of integers.
• Perform a level order traversal using a queue data structure

• Start by pushing the root node into the queue

• Pop each node from the queue, print its value, and push its children into the queue
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Q2. 
Swap Adjacent Bit Pairs Problem Statement
Given an integer N, your task is to compute the number that results from swapping each even position bit of N's binary representation with its adjacent odd bit to...read more
Ans. 
Swap each even position bit of an integer with its adjacent odd bit to the right in binary representation.
• Iterate through the binary representation of the integer and swap adjacent bits at even positions with odd positions.

• Convert the modified binary representation back to an integer to get the final result.

• Handle edge cases like leading zeros in binary representation.
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Round duration - 60 minutes
Round difficulty - Easy

Technical round with questions on Networking.

Q1. What are the various components of an IP packet header?
Ans. 
Components of an IP packet header
• Version

• Header Length

• Type of Service

• Total Length

• Identification

• Flags

• Fragment Offset

• Time to Live

• Protocol

• Header Checksum

• Source IP Address

• Destination IP Address

• Options
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Q2. What is the difference between TCP and UDP?
Ans. 
TCP is connection-oriented, reliable, and slower, while UDP is connectionless, unreliable, and faster.
• TCP is connection-oriented, meaning it establishes a connection before sending data, while UDP is connectionless and does not establish a connection.

• TCP is reliable as it ensures all data packets are received in order and retransmits any lost packets, while UDP does not guarantee delivery or order of packets.

• TCP is slo...read more
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Q3. What are the various components of a TCP segment header?
Ans. 
The TCP segment header consists of various components that help in the transmission of data over a network.
• Source Port

• Destination Port

• Sequence Number

• Acknowledgment Number

• Data Offset

• Reserved

• Flags

• Window Size

• Checksum

• Urgent Pointer
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Q1. How tcp/ip works and explain about tcp header
Ans. 
TCP/IP is a protocol used for communication between devices on a network. TCP header contains information about the data being transmitted.
• TCP/IP is a suite of protocols used for communication between devices on a network

• TCP is a connection-oriented protocol that ensures reliable delivery of data

• IP is a connectionless protocol that handles the routing of data packets

• TCP header contains information such as source and de...read more
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Q2. How vlan works and explain about vlan header
Ans. 
VLAN is a logical network created by grouping devices together based on their functions or departments.
• VLAN stands for Virtual Local Area Network

• It allows multiple networks to coexist on the same physical network

• VLANs are created by assigning a group of devices to a specific VLAN ID

• VLAN header contains a 4-byte tag that identifies the VLAN ID

• VLAN header is added to the Ethernet frame before transmission
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