One Network Enterprises Interview Questions and Answers

Test will have Code snippet MCQ Question along with Statement to write code

Q1. Java memory management
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Q2. Override equals methods
Ans. 
Overriding the equals method allows for custom comparison logic in Java classes.
• Override the equals method in a class to provide custom comparison logic.

• Ensure the overridden equals method follows the contract specified in the Java documentation.

• Consider overriding the hashCode method as well when overriding equals to maintain consistency.
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Q3. SQL Questions asked
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Q4. Code snippet given asked to tell output
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The code snippet's output depends on its logic and data structures used, such as loops and conditionals.
• Check for syntax errors that may prevent execution.

• Identify the data types of variables to understand operations.

• Look for loops and conditionals that affect output.

• Example: A loop iterating over an array may print each element.
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Q5. Design patterns questions asked
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Q1. Multi threading Questions
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Q2. Code snippet given asked to tell output of program
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The program's output depends on the logic and data structures used in the code snippet provided.
• Check for variable initialization and data types.

• Look for loops and conditional statements that affect output.

• Consider edge cases, such as empty arrays or null values.

• Example: If an array is iterated and modified, the final output may differ from the initial state.
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Q1. SQL Question Joins Index Nested Query etc
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Q2. Docker Redis Questions
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Q1. Standard HR Question & Salary negotiation
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Java mcq and rest api mcq

Q1. Write the program to reverse a string
Ans. 
Program to reverse a string using array of characters
• Create an array of characters to store the input string

• Iterate through the input string and store each character in the array

• Iterate through the array in reverse order to construct the reversed string
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Q2. Basic questions on java and java 8 features
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Q3. Method used in rest AP
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REST APIs typically use HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations on resources.
• GET - retrieve data from a server

• POST - create new data on a server

• PUT - update existing data on a server

• DELETE - remove data from a server
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Q4. Diff between put and post method
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PUT is used to update or replace an existing resource, while POST is used to create a new resource.
• PUT is idempotent, meaning multiple identical requests will have the same effect as a single request.

• POST is not idempotent, meaning multiple identical requests may have different effects.

• PUT is used when the client knows the specific URI of the resource it wants to update.

• POST is used when the server assigns a URI for th...read more
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Java programs and sql queries

Q1. Oops concepts, sql questions
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Java mcq and snippet