10+ Certainty Infotech Interview Questions and Answers

Find the largest palindrome in an array of strings and print its index with O(n) complexity.

• Iterate through the array and check if each element is a palindrome.

• Keep track of the largest palindrome found and its index.

• Return the index of the largest palindrome once the iteration is complete.

Extract values from multidimensional array, create objects, and count number of objects.

• Iterate through the array and extract values recursively

• Create objects for each value extracted

• Count the number of objects created

Client side validation is done on the user's browser while server side validation is done on the server.

• Client side validation is done using JavaScript or HTML5.

• Server side validation is done using server-side scripting languages like PHP, Python, or Ruby.

• Client side validation is faster but less secure than server side validation.

• Server side validation is more secure but slower than client side validation.

• Examples of client side validation include checking for required field...read more

Priority is the order in which defects should be fixed, while severity is the impact of a defect on the system.

• Priority determines the order in which defects should be fixed, based on business needs or deadlines.

• Severity indicates the impact of a defect on the system's functionality or performance.

• Priority is usually assigned by the project manager or product owner, while severity is determined by the QA team.

• For example, a spelling mistake in a button label may have low seve...read more

Smoke testing is a quick test to check if the basic functionalities of the software are working. Sanity testing is a more thorough test to check if the major functionalities are working as expected.

• Smoke testing is done to check if the software can be further tested.

• Sanity testing is done to check if the software is ready for further testing.

• Smoke testing is a subset of sanity testing.

• Smoke testing is done after every build, while sanity testing is done after major changes.

• Ex...read more

LAN stands for Local Area Network, a network that connects computers and devices in a limited area such as a home, office, or campus.

• LAN is a network that covers a small geographic area, typically within a single building or campus.

• It allows connected devices to communicate with each other and share resources such as printers and internet access.

• LANs are commonly used in homes, offices, and schools to facilitate communication and resource sharing.

• Ethernet is a common technolo...read more

Regression testing is done to ensure that changes made to the software do not affect the existing functionality. Retesting is done to ensure that defects found in earlier testing have been fixed.

• Regression testing is done after changes are made to the software to ensure that existing functionality is not affected

• Retesting is done to ensure that defects found in earlier testing have been fixed

• Regression testing is done on the entire system while retesting is done only on the a...read more

A spring starter is a mechanical device used to start an engine by storing energy in a spring and releasing it to turn the engine's crankshaft.

• Spring starters are commonly used in small engines, such as those found in lawnmowers or chainsaws.

• The spring is wound up manually or by pulling a cord, and when released, it rapidly unwinds to start the engine.

• Spring starters are often used as a backup to electric starters in case of battery failure.

• Examples of engines that may use sp...read more

An array is a data structure that stores a collection of elements of the same data type. ArrayList is a resizable array implementation in Java.

• Array: Fixed-size collection of elements accessed by index. Example: String[] names = new String[5];

• ArrayList: Dynamic-size collection of elements in Java. Example: ArrayList names = new ArrayList<>();