F5N2 sample questions

Question 1

A systems engineer is configuring NGINX Open Source as a load balancer for a cluster of three backend application servers. No specific load balancing algorithm has been defined in the `upstream` block. How will NGINX distribute the incoming requests by default?

Accepted Answer

NGINX will distribute requests sequentially across all servers in the pool.

Answer

NGINX will route all traffic to the first server in the block until it fails.

Answer

NGINX will send requests to the server with the fewest active connections.

Answer

NGINX will hash the client's IP address to determine the target server.

Question 2

You are configuring passive health checks for an upstream pool in NGINX Open Source. You want NGINX to consider a server 'down' if it fails to respond successfully 5 times within a 30-second window. Which server directive parameters should you use?

Accepted Answer

server backend1.example.com max_fails=5 fail_timeout=30s;

Answer

server backend1.example.com health_check=5 timeout=30s;

Answer

server backend1.example.com retries=5 interval=30s;

Answer

server backend1.example.com passive_check fails=5 window=30s;

Question 3

A high-traffic e-commerce site uses NGINX to load balance requests to backend inventory servers. Some inventory queries take significantly longer to process than others, leading to uneven load distribution when using Round Robin. Which algorithm is best suited to resolve this issue by routing new requests to the server with the lowest active workload?

Accepted Answer

least_conn

Answer

ip_hash

Answer

hash $request_uri

Answer

least_time

Question 4

An administrator needs to configure NGINX to load balance raw TCP traffic for a legacy database cluster, rather than HTTP traffic. Which TWO directives or blocks are essential for configuring this Layer 4 load balancing? (Select TWO)

Accepted Answer

The stream context block

Accepted Answer

The proxy_pass directive

Answer

The http context block

Answer

The fastcgi_pass directive

Answer

The tcp_nodelay directive

Question 5

True or False: NGINX Open Source supports out-of-the-box active health checks (using the `health_check` directive) to proactively probe upstream servers without relying on actual client traffic.

Accepted Answer

False

Answer

True

Question 6

A video streaming platform uses NGINX to load balance requests to backend cache servers. To maximize cache hit ratios, requests for the same video file must always be routed to the same backend server, regardless of the client's IP address. Which load balancing configuration achieves this?

Accepted Answer

upstream video_backend { hash $request_uri consistent; server backend1; server backend2; }

Answer

upstream video_backend { ip_hash; server backend1; server backend2; }

Answer

upstream video_backend { sticky route $request_uri; server backend1; server backend2; }

Answer

upstream video_backend { least_conn; server backend1; server backend2; }

Free F5N2 sample questions

A systems engineer is configuring NGINX Open Source as a load balancer for a cluster of three backend application servers. No specific load balancing algorithm has been defined in the `upstream` block. How will NGINX distribute the incoming requests by default?

You are configuring passive health checks for an upstream pool in NGINX Open Source. You want NGINX to consider a server 'down' if it fails to respond successfully 5 times within a 30-second window. Which server directive parameters should you use?

An administrator needs to configure NGINX to load balance raw TCP traffic for a legacy database cluster, rather than HTTP traffic. Which TWO directives or blocks are essential for configuring this Layer 4 load balancing? (Select TWO)

True or False: NGINX Open Source supports out-of-the-box active health checks (using the `health_check` directive) to proactively probe upstream servers without relying on actual client traffic.

A video streaming platform uses NGINX to load balance requests to backend cache servers. To maximize cache hit ratios, requests for the same video file must always be routed to the same backend server, regardless of the client's IP address. Which load balancing configuration achieves this?

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