Design and Implement Microsoft Azure Network Solutions (AZ-700) interview questions

When you create a private endpoint, clients must resolve the service name to the private IP. A Private DNS zone (for example privatelink.database.windows.net) linked to your VNets does that resolution automatically, so applications keep using the normal hostname but connect privately.

An NSG filters by IP, port and protocol at the subnet/NIC level. Azure Firewall is a managed stateful firewall with FQDN filtering, application rules, threat intelligence, DNAT and centralized logging across VNets. You use NSGs for micro-segmentation and Azure Firewall for central egress/ingress control.

Explain how you gathered the facts you could quickly, identified the biggest risk, made a reversible decision where possible, and set a point to re-evaluate. Note how you communicated the uncertainty and your assumptions. Show judgement and bias for action — making a sound call and adjusting beats waiting for perfect information.

Use Network Watcher: IP flow verify to test whether an NSG allows a flow, Next hop to see where a packet goes, Connection troubleshoot and Connection Monitor for end-to-end reachability, and NSG flow logs for traffic analytics. Check effective routes and effective security rules on the NIC.

Give a concrete example: how you set clear expectations, paired on real work, let them struggle productively before stepping in, gave specific feedback, and gradually handed over ownership. Mention a result — they shipped something, passed a certification, became independent. Leadership is about multiplying others, not doing it all yourself.

VNet peering connects two VNets directly over the Azure backbone with low latency and high bandwidth, no gateway needed (though gateway transit can be enabled). A VPN gateway connection encrypts over the internet and is slower — used when peering is not possible, such as across certain clouds or with on-premises.

Set a cadence and a single source of truth: short, regular updates in plain language with status, impact, next step and ETA — even when the news is "no change yet". Tailor the detail to the audience and never let people find out bad news late. Reliable, proactive communication builds the trust that lets you do the technical work.

A VNet is an isolated private network in Azure with its own address space. You divide it into subnets to group resources, and attach Network Security Groups (NSGs) to subnets or NICs to allow/deny traffic by source, destination, port and protocol. Service endpoints and private endpoints extend the VNet to PaaS services.

A central hub VNet holds shared services — firewall, gateway, DNS — and spoke VNets for workloads peer to it. It centralizes security and connectivity, isolates workloads, and avoids a full mesh of peerings. Routing through the hub lets you inspect and control traffic between spokes and to on-premises.

A service endpoint extends your VNet identity to a PaaS service over the Azure backbone but the service keeps its public IP. A private endpoint gives the PaaS service a private IP inside your VNet, so traffic never uses a public endpoint — the more secure option, and it works across peered networks and on-premises over ExpressRoute/VPN.

A site-to-site VPN runs encrypted over the public internet — quick and cheap but variable latency and bandwidth. ExpressRoute is a private, dedicated connection through a provider with higher, predictable bandwidth, lower latency and an SLA; it does not traverse the public internet. Enterprises often use ExpressRoute with a VPN as failover.

Pick a real failure and own it without blaming others. Describe how you contained the impact, communicated honestly, fixed the root cause (not just the symptom), and added a safeguard — a test, a monitor, a checklist, a runbook — so it cannot recur. Interviewers want accountability and a blameless, learning mindset, not a claim that you never fail.

Connect your answer to the actual job and company: what about the work, the stack or the mission fits your strengths and goals. For the three-year question, show healthy ambition and direction (deeper expertise, more ownership, perhaps leading) that the company could realistically support, so it reads as commitment, not a stepping stone.

Use the STAR method: briefly set the Situation and Task, then spend most of your answer on the Action — how you broke the problem down, what you tried, how you tested — and finish with the Result and what you learned. Pick a real example with a measurable outcome (time saved, outage resolved) and show your reasoning, not just the fix.

Show that you separated the person from the problem. Explain how you listened to their reasoning, brought data or a small proof of concept instead of opinions, looked for the shared goal (reliability, deadline, cost), and either reached agreement or disagreed-and-committed to the team’s decision. Avoid blaming; emphasise the outcome and the relationship staying intact.

Be specific and show it is a habit: hands-on labs and home projects, following release notes and a few trusted sources, a certification roadmap, reading other people’s code or post-mortems, and teaching others to cement what you learn. Tie it to this role’s stack. Enthusiasm plus a concrete routine beats a vague "I love learning".

Load Balancer is Layer-4 regional (TCP/UDP). Application Gateway is Layer-7 regional with WAF, SSL offload and path-based routing. Front Door is global Layer-7 with WAF, caching and fast failover across regions. Traffic Manager is DNS-based global routing. Pick by layer (4 vs 7) and scope (regional vs global).

Lead with the impact in their terms (cost, risk, time, customers affected), not the technical cause. Use a simple analogy, avoid jargon, and offer a clear recommendation with options and trade-offs. Confirm they have understood and tell them what you need from them. The goal is a confident decision, not to show how much you know.

Protect the business first: a production outage affecting users usually wins. State your rule — impact and urgency over who is shouting loudest — communicate quickly to set expectations, delegate or ask for help, and park or renegotiate the lower-impact items with their owners. Show calm, a clear framework, and that you keep people informed.

Azure uses system routes by default. You override them with User-Defined Routes (UDRs) in a route table associated to a subnet — for example, to force all egress through a network virtual appliance or Azure Firewall (forced tunneling). BGP can also propagate routes over ExpressRoute or VPN.