CredenTek Software & Consultancy Interview Questions and Answers

Q1. What is a test case in software testing?
Ans. 
A test case in software testing is a set of conditions or variables under which a tester will determine whether a system under test is working correctly or not.
• A test case includes preconditions, inputs, expected outcomes, and postconditions.

• It helps in identifying defects or errors in the software.

• Examples of test cases include verifying login functionality, checking data validation, and testing performance under load...read more
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Q1. Introduction, family background and educational qualifications
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Q1. Third highest salary in emp table?
Ans. 
To find the third highest salary in emp table, we need to use the ORDER BY and LIMIT clauses.
• Use ORDER BY to sort the salaries in descending order.

• Use LIMIT to select the third highest salary.

• Example query: SELECT salary FROM emp ORDER BY salary DESC LIMIT 2,1
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Q2. What is join and write down one example?
Ans. 
Join is used to combine rows from two or more tables based on a related column between them.
• Join is used to retrieve data from multiple tables in a single query.

• There are different types of joins like inner join, left join, right join, and full outer join.

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;
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Q1. Technical questions on SQL Linux and windows
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Q2. Technical questions on SQL windows and Linux commands
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60 min, aptitude, coding mcq

Q1. Find second highest salary of an employee
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Q2. Programming of design pattern
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Design patterns are reusable solutions to common problems in software design.
• Design patterns help in creating maintainable and scalable code.

• Examples include Singleton, Factory, Observer, and Strategy patterns.

• Each design pattern has a specific purpose and can be applied in different scenarios.
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