Software Testing

Security Testing – What is Security testing?

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What is Security testing? Security testing is a process to determine that an information system protects data and maintains functionality as intended. It is the process that determines that confidential data stays confidential and users can perform only those tasks that they are authorized to perform. Security testing covers confidentiality, integrity, authentication, availability, authorization and […]

Electronics

Basic Electronics – 2

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Passive Components RESISTORS To oppose the flow of electrons ( current). The symbols are shown below. Resistance is measured in units called “Ohm”. 1000 ohms is shown as 1k ohm (103 ohm) and 1000 k ohm is shown as M.ohms (106ohm). Resistors can be broadly of two types. • Fixed Resistors and Variable Resistors. Fixed […]

Software Testing

Security Testing

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Security Testing What is Security testing? Security testing is a process to determine that an information system protects data and maintains functionality as intended. It is the process that determines that confidential data stays confidential and users can perform only those tasks that they are authorized to perform. Security testing covers confidentiality, integrity, authentication, availability, […]

Electronics

Basic Electronics – 1

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Introduction Electronic component can be divided into 2 types: Active and Passive components Resistors and Capacitors etc. are known as passive components because they can only attenuate the electrical voltage and signals and cannot amplify. Devices like transistors and operational amplifier(op Amps)can amplify or increase the amplitude and energy associated with the signals and so are […]

Software Testing

Solving software performance problems

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How to solve software performance problems ? 1.  Define your Objective -where you need to be? It is surprising that many projects do not have well-defined performance objectives. When we ask what the performance objectives are, we very often get a response like “as fast as possible.” An objective such as this is not useful […]

How-To

Compiling and Installing Custom Linux Kernel

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Compiling and Installing Custom Linux Kernel The below mentioned steps will work in Ubuntu or debian like systems. I have tested it on Ubuntu 10.10. Download and unzip(preparing) sudo apt-get update sudo apt-get install kernel-package libncurses5-dev fakeroot wget bzip2 Download the kernel sources and unzip as shown below. sudo tar xjf linux-2.6.18.1.tar.bz2sudo ln -s linux-2.6.18.1 […]

How-To

No Sound from Ubuntu linux or Mint

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No Sound from Ubuntu linux or Mint Searched google for possible answer to the problem but solution mentioned was not sufficient to solve my issues. I wasted couple of weekends resolving this issue.Finally I solved by removing PulseAudio and ALSA packages and installing OSS(Open Sound System) What is OSS?OSS provides low -level audio drivers for […]

Software Testing

Statistical Principals for the Performance Tester

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Over the years I found that members of software development teams, developers, testers, administrators and managers alike have an insufficient grasp on how to apply mathematics or interpret statistical data on the job. As performance testers, we must know and be able to apply certain mathematical and statistical concepts. Exemplar Data Sets This section refers […]