Angular 22 Interview Questions & Answers

 

1. What is new in Angular 22?

Answer:
Angular 22 continues Angular's modern direction around:

• Standalone APIs
• Signals and signal-based reactivity
• Improved control flow
• Zoneless change detection
• Better TypeScript support
• Improved build and development tooling
• Performance improvements
• Modern Angular template syntax
• Improved SSR/hydration
• Continued reduction of legacy APIs

For an Angular 21 developer, the important point is that Angular 22 is primarily an evolution of the modern Angular architecture rather than a completely different framework.

---

2. What Angular version should you use with Angular 22?

Answer:
Angular 22 should be used with the Node.js and TypeScript versions officially supported by Angular 22.

In an upgrade, I would not manually guess these versions. I would first check Angular's version compatibility table and then upgrade the Angular CLI/framework and TypeScript together.

Common RxJS Pipe Operators with Simple Examples

 

1. map()

Transforms each value.

of(1, 2, 3).pipe(
  map(x => x * 10)
)
.subscribe(console.log);

Output:

10
20
30

Meaning:

• Takes each value
• Changes it
• Returns new value

Kubernetes kubectl Commands

 

🔧 1. Cluster Info and Context

kubectl cluster-info                       # Display cluster endpoint info
kubectl config get-contexts                # List contexts
kubectl config use-context <context-name>  # Switch to a specific context
kubectl get nodes                          # List all worker/master nodes
kubectl describe node <node-name>          # Detailed info about a node

---

📦 2. Pods

kubectl get pods                           # List all pods in the current namespace
kubectl get pods -A                        # List all pods in all namespaces
kubectl describe pod <pod-name>            # Show detailed info about a pod
kubectl logs <pod-name>                    # View logs of a pod
kubectl logs -f <pod-name>                 # Stream logs
kubectl exec -it <pod-name> -- /bin/bash   # Get shell access inside a pod
kubectl delete pod <pod-name>              # Delete a pod

---

Quick Guide to Kubernetes

Kubernetes is a container orchestration system. It helps you deploy, scale, manage, and heal your containerized applications (like Docker containers) automatically.

---

⚙️ High-Level Architecture:

+------------------+
|     User (You)   |
+--------+---------+
         |
         v
+--------+----------+        +----------------+
|   Kubernetes API  | <----> |     kubectl    |
|     (Control Plane)|       +----------------+
+--------+----------+
         |
         v
+--------+----------+---------------------------+
| Scheduler | Controller Manager | etcd (DB)    |
+-----------+--------------------+--------------+
         |
         v
+--------+----------+
|     Kubelet       |     <--- On each worker node
|   (runs on nodes) |
+--------+----------+
         |
         v
+------------------+
|   Container Runtime (Docker/containerd)       |
|   Runs Pods with app containers inside        |
+------------------+

---

Step-by-step guide to install Kubernetes (K8s) on Red Hat Enterprise Linux (RHEL) 9.5

 Here’s a step-by-step guide to install Kubernetes (K8s) on Red Hat Enterprise Linux (RHEL) 9.5, using kubeadm, the official Kubernetes tool.

---

✅ Prerequisites

1. Root / sudo access

2. Swap disabled

3. Docker or containerd installed

4. Firewall open for Kubernetes ports

5. Unique hostname, static IP, and DNS resolution for each node

---

🔧 Step 1: Disable Swap

sudo swapoff -a
sudo sed -i '/swap/d' /etc/fstab

What is the difference between devDependencies and dependencies in package.json?

 

🔹 dependencies

Packages your app needs to run in production.

• Used in the app's runtime code

• Installed on both development and production environments

• Example: Frameworks, HTTP clients, database drivers

Example:

"dependencies": {
  "express": "^4.18.2",
  "axios": "^1.6.0"
}

📊 Mutual Funds vs Equity vs Futures vs Options: What Should You Choose?

In the world of investing and trading, there are multiple vehicles to grow your money — but they’re not all the same. Here's a clear comparison to help you understand which instrument suits your needs, skills, and risk profile.

🔎 Comparison Table

Feature	Mutual Funds	Equity (Stocks)	Futures	Options
Ownership	Indirect (via fund manager)	Direct (you own shares)	Contract-based (buy/sell later)	Right to buy/sell, not obligation
Capital Required	Low (₹500 SIP possible)	Moderate (per share price)	High (lot size × price)	Low (just the premium)
Risk Level	Low to Medium	Medium to High	High	Very High
Return Potential	Moderate, stable	High (if selected well)	High but risky	Very high (or zero)
Time Involvement	Passive	Moderate (needs research)	Active, short-term	Very active, time-sensitive
Charges	Fund fees, exit load	STT, brokerage, taxes	STT, brokerage, margin fees	STT, premium cost, brokerage
Who Manages It?	Professional fund manager	You	You	You
Leverage	No	No	Yes (margin)	Yes (in-built)
Best For	Passive long-term investors	Active long-term investors	Experienced short-term traders	Speculators, hedgers