Question 1

Different access specifiers for the class member in C++

Accepted Answer

Access specifiers in C++ determines the scope of the class members Public: If a class member is public, it can be used anywhere without the access restrictions Private: if a class member is private, it can be used only by the members and friends of class Protected: If a class member is protected, it can be used only by the members and friends of class and the members and friends of classes derived from class

Question 2

What are virtual functions?

Accepted Answer

Polymorphism is also achieved in C++ using virtual functions If a function with same name exists in base as well as parent class, then the pointer to the base class would call the functions associated only with the base class However, if the function is made virtual and the base pointer is initialized with the address of the derived class, then the function in the child class would be called

Question 3

What is a container class?

Accepted Answer

A class is said to be a container class which is utilized for the purpose of holding objects in memory or persistent media A generic class plays a role of generic holder A container class is a good blend of predefined behavior and an interface that is well known The purpose of container class is to hide the topology for the purpose of objects list maintenance in memory A container class is known as heterogeneous container, when it contains a set of different objects A container class is known as homogeneous container when it contains a set of similar objects

Question 4

What is the role of Bug Tracking System?

Accepted Answer

The Bug Tracking System role is discussed below: - Testers and developers can know the status of the bug at every stage - Changes to the Status will be available to all team members - Developers and Testers can easily interact with bugs - Repetition of bugs will be avoided - Easy to distribute the bug among the developer - It will act as a centralized one for defects

Question 5

Describe Bottom-Up and Top-Down approach in Testing.

Accepted Answer

Bottom Up Approach: The bottom up approach testing approach is carried out with the help of the test driver The test driver calls a component to be tested The modules in the lower level of call hierarchy are tested independently Then the next level modules are tested that call previously tested modules This is done repeatedly until all the modules are included in the testing Bottom up testing stops when the top module in the call hierarchy is tested with all lower call hierarchy modules Top Down Approach: The top down approach is carried out with the help of the test stub Test stub are the dummy programs The Stub is called from the software component to be tested Tests top layer of controlling subsystem first Then combine modules that are called by the tested modules and test resulted collection of modules Do this until all the modules are combined and tested

Question 6

What is parallel/audit testing?

Accepted Answer

Parallel/audit testing is testing where the user reconciles the output of the new system to the output of the current system to verify the new system performs the operations correctly Let us say, for example, the currently software is in the mainframe system which calculates the interest rate The company wants to change this mainframe system to web-based application While testing the new web based application, we need to verify that the web-based application calculates the same interest rate This is parallel testing

Question 7

What is the importance of XML-based layouts?

Accepted Answer

The use of XML-based layouts provides a consistent and somewhat standard means of setting GUI definition format In common practice, layout details are placed in XML files while other items are placed in source files

Question 8

Why an app on iOS device behaves differently when running in foreground than in background?

Accepted Answer

An application behaves differently when running in foreground than in background because of the limitation of resources on iOS devices

Question 9

What is session storage and how can you create one?

Accepted Answer

Session storage is same like local storage but the data is valid for a session In simple words the data is deleted as soon as you close the browser To create a session storage you need to use “sessionStoragevariablename” In the below code we have a created a variable called as “clickcount” If you refresh the browser the count increases But if you close the browser and start again the “clickcount” variable starts from zero if(sessionStorageclickcount) { sessionStorageclickcount=Number(sessionStorageclickcount)+1; } else { sessionStorageclickcount = 0; }

Question 10

Why cannot you run standard Java byte code on Android ?

Accepted Answer

Android uses Dalvik Virtual Machine (DVM) which requires a special bytecode We need to convert Java class files into Dalvik Executable files using an Android tool called "dx" In normal circumstances, developers will not be using this tool directly and build tools will care for the generation of DVM compatible files

Question 11

Where can you define the icon for your Activity ?

Accepted Answer

Icon for an Activity is defined in the manifest file Code

Question 12

Data structure suitable for an application discussed in?

Accepted Answer

data design

Question 13

XML preserves white spaces.

Accepted Answer

True, the given statement that xml preserves white spaces is correct.

Question 14

A website main page is called

Accepted Answer

A website main page is called as start page or home page.

Question 15

The PHP Syntax is most similar to

Accepted Answer

PHP is similar to the C style syntax in terms of keywords and language syntax. If conditions, for and while loops, and function returns are similar in syntax to languages such as C, C++, C#, Java and Perl.

Question 16

Explain 5-4-3 rule

Accepted Answer

In a Ethernet network, between any two points on the network, there can be no more than five network segments or four repeaters, and of those five segments only three of segments can be populated

Question 17

What is difference between baseband and broadband transmission?

Accepted Answer

In a baseband transmission, the entire bandwidth of the cable is consumed by a single signal In broadband transmission, signals are sent on multiple frequencies, allowing multiple signals to be sent simultaneously

Question 18

When would you use the ping command with the "-t" switch?

Accepted Answer

to get the ping back from other computer with no packet loss

Question 19

What command-line tool would help you discover for which port numbers your computer is listening?

Accepted Answer

netstat -n (on Dos prompt)

Question 20

What is the (default) class type of 195.152.12.1?

Accepted Answer

CLASS B with NET ID 19515200

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