Release Testing - Performance and Stress Testing

Performance testing, operational profile, stress testing, failure behavior, distributed systems degradation

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QUESTION OF

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Views #: 203

Questions #: 10

Time: 10 minutes

Pass Score: 80.0%

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Step

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Mode

Exam

Practice

Performance Testing Goal

1 pts

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What is the primary goal of performance testing during release testing?

To verify that the system's source code is optimally structured

To measure the number of lines of code executed per second

To check that the system can process its intended load and meets performance requirements

To identify all remaining functional defects before release

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Operational Profiles

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What is an operational profile in the context of performance testing?

A reflection of the mix of work that will be handled by the system in its real operational environment

A list of all hardware components required to run the system in production

A document listing all system users and their access permissions

A benchmark comparing the system to competitor products

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Increasing Load in Performance Testing

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During performance testing, load is typically increased incrementally. What is observed as load increases beyond the system's capacity?

System performance degrades gracefully and then completely fails at some point

The system performs at a constant level regardless of load increase

The system automatically redistributes load to avoid degradation

Response times improve as the system adapts to higher loads

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Stress Testing Definition

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What is stress testing in the context of release testing?

Testing with the minimum possible load to find memory leaks

Testing to measure the exact performance specification numbers

Testing the system beyond its design capacity limits to observe failure behavior

Testing the psychological stress experienced by the development team during late-stage testing

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Why Stress Testing Matters - Failure Behavior

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When the system is overloaded beyond capacity during stress testing, what critical question is being answered?

Whether system failure is 'soft' and recoverable, or 'hard' and causes data loss or corruption

How many users can log in simultaneously without any performance impact

How fast the system can recover once normal load resumes

Whether the system's network bandwidth is adequate for peak demand

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Stress Testing and Distributed Systems

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Stress testing is particularly useful for revealing which type of defects in distributed systems?

Logic errors in individual methods that are invisible during normal load

Interface misuse defects caused by incorrect parameter types

Memory allocation bugs caused by incorrect pointer arithmetic

Defects that occur when the system is fully loaded, such as interaction defects between components that only appear under high traffic

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Performance Testing in Transaction Processing Systems

1 pts

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For transaction processing systems, performance tests are usually designed around what metric?

The number of transactions per second that the system can process

The number of concurrent database connections

The physical memory consumed by each transaction

The number of lines of code executed per transaction

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Performance vs. Stress Testing - Distinction

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To complete the line match

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Scenario

Observing whether the system corrupts data when it runs out of memory

Testing the system with 5,000 concurrent users - 10 times the expected peak load

Verifying response time is under 2 seconds for typical user requests

Testing the system with 500 concurrent users - the expected peak load

Type

Stress testing

Performance testing

Match each testing scenario to whether it is performance testing or stress testing.

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Why Stress Test Beyond Design Limits

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Some testers question why systems should be stress tested beyond their design limits. Which of the following are valid reasons to conduct stress testing? Select all that apply.

To help developers and operators plan for graceful degradation under overload

To observe how the system behaves under extreme conditions and whether it fails safely

To check whether the system loses or corrupts data when it fails

To guarantee the system will never need to be rebooted in production

To check that the system can handle load spikes that exceed normal predictions

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Soft Failure vs. Hard Failure

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Failure Description

×System crashes and all in-progress transactions are permanently lost

×System slows but continues processing; recovers when load is reduced

Soft (graceful) failure

Hard (catastrophic) failure

A medical record system is stress tested by generating 10 times its normal transaction load. In one test, the system slows dramatically but continues processing and recovers when load is reduced. In another test, the system crashes and all in-progress transactions are permanently lost. Classify each failure type.

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Undergraduate Professional

Performance Testing Goal

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Operational Profiles

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Explanation

Increasing Load in Performance Testing

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Explanation

Stress Testing Definition

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Explanation

Why Stress Testing Matters - Failure Behavior

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Explanation

Stress Testing and Distributed Systems

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Explanation

Performance Testing in Transaction Processing Systems

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Explanation

Performance vs. Stress Testing - Distinction

Scenario

Type

Correct Answer

Explanation

Why Stress Test Beyond Design Limits

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Explanation

Soft Failure vs. Hard Failure

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Explanation

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