HCLTech Technical Lead Interview Questions, Process, and Tips

Q1. About Technical
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Q2. Job description oriented
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Q3. Past Experience
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Q1. About past experience
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Q2. And Technical questions
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Q1. Explain internal architecture of hashmap.
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.
• HashMap is implemented using an array of linked lists, where each element in the array is a bucket that can store multiple key-value pairs.

• When a key-value pair is added to the HashMap, the key is hashed to determine the index in the array where the pair will be stored.

• If multiple keys hash to the same index, a colli...read more
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Q1. What is your strength and weakness.
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Q1. One to one round with technical panel
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Q1. Databases , java
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Some common coding question like reversing string

Q1. Ienumerable vs IQuyerable
Ans. 
IEnumerable is a simple interface for iterating over a collection, while IQueryable is used for querying data from a data source.
• IEnumerable is in-memory data manipulation, while IQueryable is for querying data from a database.

• IEnumerable is suitable for LINQ to Objects, while IQueryable is suitable for LINQ to SQL.

• IEnumerable is evaluated on the client-side, while IQueryable is evaluated on the database server.

• IEnumer...read more
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Q2. Diff between constant and readonly
Ans. 
Constants are compile-time constants, while readonly variables can be assigned a value at runtime but cannot be changed after initialization.
• Constants are declared using the 'const' keyword, while readonly variables are declared using the 'readonly' keyword.

• Constants are evaluated at compile time, while readonly variables are evaluated at runtime.

• Constants can only be assigned a value at declaration, while readonly var...read more
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Q1. Difference between ingress and load balancer in Kubernetes
Ans. 
Ingress manages external access to services, while load balancer distributes traffic within the cluster.
• Ingress is an API object that manages external access to services in a cluster.

• Ingress typically provides HTTP and HTTPS routing.

• Load balancer is a service that distributes incoming network traffic across multiple backend services.

• Load balancer ensures that no single service is overwhelmed with traffic.

• In Kubernetes,...read more
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Q2. AWS Cloud Formation basics
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Q1. CAP Theorem-based scenario questions
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Q2. Different kinds of databases and their uses.
Ans. 
Different types of databases serve different purposes, such as relational databases for structured data and NoSQL databases for unstructured data.
• Relational databases: used for structured data and follow a tabular format (e.g. MySQL, PostgreSQL)

• NoSQL databases: used for unstructured data and provide flexibility in data storage (e.g. MongoDB, Cassandra)

• Graph databases: used for data with complex relationships (e.g. Neo4...read more
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