Computer Knowledge

Mobile Telecommunications Networks

2,298 Questions

Mobile telecommunications networks focus on cellular technologies including 5G architecture and GSM components. Key areas of study include network function virtualization, software defined networking, and beamforming. This topic is crucial for technical exams testing computer and networking awareness.

5G architecture componentsNetwork function virtualizationMassive MIMO technologyGSM network registersBeamforming and CSI

Mobile Telecommunications Networks Questions

Multiple choice technology platforms and products

Which of the following is not a resource exposed through R.java

  1. values

  2. layout

  3. xml

  4. namespace

  5. None of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

R.java is an auto-generated file in Android that contains references to all project resources. It exposes resource types like values (strings, colors, dimensions), layouts, XML resources, drawables, etc. 'namespace' is not a resource type in Android - it's a Java package concept.

Multiple choice technology platforms and products

Java ME and Java SE applications are runnable on Android even if the class libraries as well as the generated byte code are different

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Android uses a different Java virtual machine (Dalvik or ART) and different class libraries than Java ME or Java SE. Android applications are compiled to Dalvik bytecode (.dex format), not standard JVM bytecode. Standard Java ME/SE applications cannot run on Android without significant modification due to these fundamental differences in runtime environment and APIs.

Multiple choice technology platforms and products

The visible lifetime of an activity happens between a call to onStart() until a corresponding call to onPause(). Choose the right answer.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The visible lifetime of an activity extends from onStart() to the corresponding onStop() call, not onPause(). The activity is visible to the user in the onStart()-onStop() window, while onPause() indicates partial obscuration (activity is still visible but not in focus). The visible lifecycle can repeat multiple times as the user navigates away and back.

Multiple choice technology platforms and products

____ method is called just before the activity starts interacting with the user. At this point the activity is at the top of the activity stack, with user input going to it.

  1. onPause()

  2. onResume()

  3. onRestart()

  4. onStart()

  5. None of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the Android Activity lifecycle, onResume() is called just before the activity starts interacting with the user, bringing it to the top of the activity stack and receiving user input.

Multiple choice technology platforms and products

The onStart() and onStop() methods can be called multiple times, as the activity alternates between being visible and hidden to the user.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

True. The onStart() and onStop() methods can be called multiple times during an activity's lifetime. Each time the activity becomes visible to the user, onStart() is called, and when it's no longer visible, onStop() is called. This cycle can repeat many times - for example, when the user navigates to other apps and returns, or when a dialog appears and disappears.

Multiple choice technology platforms and products

__________ method is called when activity is first created

  1. onStart()

  2. onResume()

  3. onCreate()

  4. None of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

onCreate() is the first method called when an activity is created. It's where you initialize your activity, set up the UI with setContentView(), bind data, and create any objects or resources the activity will need. This method is called once per activity instance, unlike onStart() or onResume() which can be called multiple times.

Multiple choice technology platforms and products

Between ______ & ________methods, you can maintain resources that are needed to show the activity to the user.

  1. onResume(), onStop()

  2. onStart(), onStop()

  3. onStart(), onDestroy()

  4. onResume(), onDestroy()

  5. None of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In Android activity lifecycle, onStart() indicates when the activity becomes visible to the user, and onStop() is called when it's no longer visible. Resources needed to display the activity to the user (such as views and UI elements) should be initialized in onStart() and released in onStop(). onResume() and onPause() are for foreground/interactive state, not visibility.

Multiple choice technology platforms and products

________ method is passed a Bundle object containing the activity's previous state, if that state was captured.

  1. onCreate()

  2. onResume()

  3. onStart()

  4. None of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The onCreate() method receives a savedInstanceState Bundle parameter that contains the activity's previously saved state. This state is captured in onSaveInstanceState() when the activity may be killed by the system. onResume() and onStart() do not receive this Bundle parameter.

Multiple choice technology platforms and products

An android application includes the following components -

  1. Activity, Service, Process and Content Provider

  2. Activity, Intent, Process and Service

  3. Activity, Service, Broadcast Receiver and Content provider

  4. Service, Process, Broadcast Receiver and Content Provider

  5. None of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The four official Android application components are Activities, Services, Broadcast Receivers, and Content Providers. Options A and D incorrectly include 'Process', which is not an application component but a runtime container. Option B incorrectly includes 'Intent', which is a messaging object, not a component.

Multiple choice technology platforms and products

There are 250,000+ apps available for the iPhone on Apple App Store. Anybody with a Mac can buy, download and run these applications on the Mac.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

iOS apps cannot run on macOS because they are compiled for ARM architecture and use iOS-specific frameworks, while Mac apps use Intel binaries and Mac frameworks. Although both are Apple platforms, they have different architectures, SDKs, and app ecosystems. The 250,000+ apps were designed for iPhones and iPads, not Mac computers (this changed years later with Apple Silicon).

Multiple choice technology packaged enterprise solutions

Connectivity supported by android(depends on hardware):

  1. Bluetooth

  2. 3G

  3. WiFi(Wireless Fidelity)

  4. Enhanced Data rate for GSM Evolution(EDGE)

  5. Infrared
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation

Android supports multiple connectivity options depending on hardware: Bluetooth for short-range device communication, 3G for cellular data, WiFi for wireless local area networking, and EDGE (Enhanced Data rates for GSM Evolution) as an enhanced 2.5G cellular technology. Infrared is NOT supported - it's an older line-of-sight technology not part of the Android connectivity stack.

Multiple choice technology operating systems

Four Major Application Components present in Android are:

  1. activity,service,broadcast transmitter and content provider

  2. actions,service,broadcast receiver and content enabler

  3. activity,servlets,broadcast enabler and content getter

  4. activity,service,broadcast receiver and content provider

  5. activity,service,transmitter,receive
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Android has four major application components: Activities (UI screens), Services (background operations), Broadcast Receivers (respond to system-wide broadcasts), and Content Providers (manage data sharing between apps). Option D correctly lists all four. The other options use incorrect terminology like 'transmitter', 'enabler', 'servlets' which are not Android component names.

Multiple choice technology operating systems

Some inValid Methods (Java's Method since the code is developed in Java Programming Language for android) names available in activity lifecycle are

  1. void onCreate(Bundle savedInstanceState)

  2. void onStart()

  3. void onResume()

  4. void onDestroy()

  5. void onExit
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Android's Activity lifecycle includes standard callback methods such as onCreate, onStart, onResume, and onDestroy. There is no void onExit method in Java's Android Activity lifecycle class, making it an invalid method name, whereas the others are all standard, valid callbacks.

Multiple choice technology operating systems

In Android, which Statement is used to get ContentResolver within the Activity or other application component?

  1. ContentResolver cr = getContentResolver();

  2. ContentResolver cr = getContentResolver(cr);

  3. ContentResolver cr = getContentResolver(content);

  4. ContentResolver cr = getContentResolver(void);

  5. ContentResolver cr = getContentResolver(context);
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

getContentResolver() is the correct method to obtain a ContentResolver instance within an Activity or other application component. It takes no parameters and returns a ContentResolver object that can interact with content providers. The other options incorrectly pass parameters (cr, content, void, context) to this method.