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Airtel Africa Interview Questions and Answers
20 Interview questions
Find pairs in a list of integers that sum to a specified target value.
Use a hash map to store numbers and their indices for quick lookup.
Iterate through the list and check if (target - current number) exists in the hash map.
Example: For list [1, 2, 3, 4] and target 5, pairs are (1, 4) and (2, 3).
Consider edge cases like duplicates and negative numbers.
The start point of a linked list is the first node in the list.
The start point is typically referred to as the 'head' of the linked list.
It is the entry point for traversing the linked list.
Example: In a linked list with nodes A -> B -> C, A would be the start point.
A linked list is a data structure where each element points to the next element in the sequence.
Create a Node class with data and next pointer
Initialize a head pointer to the first node
Traverse the list by following the next pointers
Insert and delete nodes by updating pointers accordingly
Primary annotations in Java are metadata that provide information about the program but do not affect its execution.
Annotations are defined using the '@' symbol, e.g., @Override.
They can be used for documentation, code analysis, and runtime processing.
Common primary annotations include @Deprecated, @Override, and @SuppressWarnings.
Custom annotations can be created using the 'annotation' keyword, e.g., @interface M...
A qualifier in Java is a keyword used to specify additional information about a variable or method.
Qualifiers include 'final', 'static', 'abstract', 'public', 'private', 'protected', etc.
They are used to define the behavior and access level of variables and methods.
For example, 'final' qualifier makes a variable constant and 'static' qualifier allows a method to be called without creating an instance of the class.
View binding simplifies UI interactions in Android by providing type-safe access to views.
View binding is enabled in the build.gradle file: 'android { viewBinding { enabled = true } }'
It generates a binding class for each XML layout file, e.g., 'ActivityMainBinding' for 'activity_main.xml'.
Access views directly using the binding object, e.g., 'binding.textView.setText('Hello World!')'.
No need for 'findViewById', r...
Design a system similar to cars24, discussing components and design patterns.
Components: User interface, database, search engine, recommendation engine, payment gateway
Design pattern: Model-View-Controller (MVC)
User interface: Allow users to search for cars, view car details, and make purchases
Database: Store car information, user details, and transaction history
Search engine: Enable users to search for cars based...
Code to find the maximum time occupied room given meeting slots.
Sort the meeting slots based on start time.
Iterate through the sorted slots and keep track of the maximum occupied time.
Check for overlapping slots and update the maximum occupied time accordingly.
Design a data pipeline to ingest data from streaming sources.
Identify the streaming sources and their data formats
Choose a streaming platform like Apache Kafka or AWS Kinesis
Design the pipeline architecture with data ingestion, processing, and storage components
Ensure scalability, fault-tolerance, and data consistency
Monitor and optimize the pipeline performance
Row and columnar file formats in Hive differ in the way data is stored and accessed.
Row format stores data in a row-by-row manner, while columnar format stores data in a column-by-column manner.
Row format is suitable for OLTP workloads, while columnar format is suitable for OLAP workloads.
Columnar format allows for faster query performance and compression, while row format allows for faster inserts and updates.
Exa...
Airtel Africa Interview Experiences
20 interviews found
Anonymous
(3 Questions)
- Q1. Write linked list
- Q2. Write other methods of linked list
- Ans.
Other methods of linked list include doubly linked list, circular linked list, and sorted linked list.
Doubly linked list: Each node has a reference to the next and previous node.
Circular linked list: Last node points back to the first node, forming a circle.
Sorted linked list: Nodes are arranged in a sorted order based on a specific criteria.
- Q3. Start point of linked list
- Ans.
The start point of a linked list is the first node in the list.
The start point is typically referred to as the 'head' of the linked list.
It is the entry point for traversing the linked list.
Example: In a linked list with nodes A -> B -> C, A would be the start point.
I applied via Approached by Company and was interviewed in Oct 2024. There was 1 interview round.
(2 Questions)
- Q1. What is a qualifier?
- Q2. What is primary annotation?
Skills evaluated in this interview
OM PRAKASH CHOURASIA
Selected
I appeared for an interview in Mar 2025, where I was asked the following questions.
- Q1. Tell me about yourself
- Q2. Why do you want to leave your current organization
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Jan 2024. There were 3 interview rounds.
(2 Questions)
- Q1. Design cars24 like system , what are the components and which design pattern i will use. Discussion on the design.
- Ans.
Design a system similar to cars24, discussing components and design patterns.
Components: User interface, database, search engine, recommendation engine, payment gateway
Design pattern: Model-View-Controller (MVC)
User interface: Allow users to search for cars, view car details, and make purchases
Database: Store car information, user details, and transaction history
Search engine: Enable users to search for cars based on v...
- Q2. Write code to find the maximum time occupied room , given the slots of meetings.
- Ans.
Code to find the maximum time occupied room given meeting slots.
Sort the meeting slots based on start time.
Iterate through the sorted slots and keep track of the maximum occupied time.
Check for overlapping slots and update the maximum occupied time accordingly.
(1 Question)
- Q1. Write code for singleton design pattern write code for binary search write code to find minimum number of coins needed to get a number, given a list of denominations
- Ans.
Code for singleton design pattern, binary search, and finding minimum number of coins needed
For singleton design pattern, create a private static instance variable and a private constructor
For binary search, divide the array in half and compare the middle element with the target
For finding minimum number of coins, use dynamic programming and iterate through the denominations
(1 Question)
- Q1. It was hiring manager round Write multithreading code to get thee sum of all elements of matrix write code to get the repeating number from array given numbers are in range 1 to n write code to get minimu...
Interview Preparation Tips
- DSA
- System Design
- Design Patterns
Skills evaluated in this interview
Selected
I appeared for an interview in Sep 2024, where I was asked the following questions.
- Q1. There are n number of houses built in a line, each of which contains some money in it. A thief is going to steal the maximum money of these houses, but he can’t steal in two adjacent houses because the own...
- Q2. In a list of integer find pairs which sum is equal to a target value
- Ans.
Find pairs in a list of integers that sum to a specified target value.
Use a hash map to store numbers and their indices for quick lookup.
Iterate through the list and check if (target - current number) exists in the hash map.
Example: For list [1, 2, 3, 4] and target 5, pairs are (1, 4) and (2, 3).
Consider edge cases like duplicates and negative numbers.
- Q3. MVVM, Coroutines, DI
Interview Preparation Tips
(2 Questions)
- Q1. Jetpack compose
- Q2. View binding coding
- Ans.
View binding simplifies UI interactions in Android by providing type-safe access to views.
View binding is enabled in the build.gradle file: 'android { viewBinding { enabled = true } }'
It generates a binding class for each XML layout file, e.g., 'ActivityMainBinding' for 'activity_main.xml'.
Access views directly using the binding object, e.g., 'binding.textView.setText('Hello World!')'.
No need for 'findViewById', reduci...
Selected
I appeared for an interview in Dec 2024, where I was asked the following questions.
- Q1. Java and design
- Q2. Database and linux
Amir Yousuf Kochi
- Q1. Past experience
- Q2. Case study approaches
Selected
I applied via Recruitment Consulltant and was interviewed before Aug 2023. There were 4 interview rounds.
(1 Question)
- Q1. Ios related questions
(1 Question)
- Q1. Project related past experiences
(1 Question)
- Q1. Salary negotitations and discussion
(1 Question)
- Q1. Fitment round which team to align with
Selected
I applied via Approached by Company and was interviewed in Jun 2023. There were 4 interview rounds.
(1 Question)
- Q1. Basic Data Structures
- Ans. Questions based on array and linked list
(1 Question)
- Q1. Programming interview questions
- Ans. Basic programming
(2 Questions)
- Q1. General manager discussion
- Q2. Scenario based questions
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Airtel Africa Interview FAQs
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Senior Software Engineer
93
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|  ₹18 L/yr - ₹31 L/yr |
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Software Engineer
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| ₹13 L/yr - ₹20.5 L/yr |
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Senior Manager
40
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| ₹18.2 L/yr - ₹42 L/yr |
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Assistant Manager
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| ₹8 L/yr - ₹15.5 L/yr |
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| ₹36 L/yr - ₹53 L/yr |
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