OPK e Services Interview Questions and Answers

Q1. What is quality assurance?
Ans. 
Quality assurance ensures products meet specified requirements and standards through systematic processes and evaluations.
• Focuses on preventing defects in products and services.

• Involves processes like audits, process checklists, and quality control.

• Example: In software, QA includes testing phases like unit testing and integration testing.

• Ensures compliance with industry standards, such as ISO 9001.

• Involves continuous i...read more
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Q2. Write basic sql queries.
Ans. 
Basic SQL queries are essential for data retrieval and manipulation in databases, crucial for quality analysis.
• SELECT statement: Retrieves data from a database. Example: SELECT * FROM employees;

• WHERE clause: Filters records based on conditions. Example: SELECT * FROM employees WHERE department = 'Sales';

• JOIN operation: Combines rows from two or more tables based on a related column. Example: SELECT employees.name, depa...read more
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Q1. Basic introduction
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Q2. WFO readiness or not
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So in the first round they will give you assignment related to SQL..You need to know SQL very well. Like joins, Functions, window function etc.

Q1. What is union and union all?
Ans. 
UNION and UNION ALL are SQL commands used to combine the result sets of two or more SELECT statements.
• UNION removes duplicate rows from the combined result set

• UNION ALL does not remove duplicate rows

• Both commands require that the number of columns in each SELECT statement must be the same

• Example: SELECT column1 FROM table1 UNION SELECT column1 FROM table2;

• Example: SELECT column1 FROM table1 UNION ALL SELECT column1 FRO...read more
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Q2. What is delete and truncate?
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Delete and truncate are SQL commands used to remove data from a table, but with different implications.
• DELETE is a DML command used to remove specific rows from a table without affecting the table structure

• TRUNCATE is a DDL command used to remove all rows from a table, resetting the table to its initial state

• DELETE can be rolled back, while TRUNCATE cannot be rolled back

• DELETE triggers the delete trigger, while TRUNCAT...read more
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Q1. Good an easily questions
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Q2. Email marketing,
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Q3. What is the process of data analytics in relation to campaign creation?
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