Computer Knowledge

Computer Hardware Devices

893 Questions

Computer Hardware Devices focuses on the physical components of a computer system, including input, output, and memory devices. It tests practical understanding of ports, displays, and peripheral technologies. This topic is common in the computer knowledge section of banking and SSC exams.

Input output devicesMonitor settingsComputer portsAssistive technologyHardware components

Computer Hardware Devices Questions

Multiple choice technology

Keyboard

  1. I-Tech laser keyboard

  2. IR laser keyboard

  3. Apple laser keyboards

  4. Rollup Keyboards
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The 5 PEN PC uses a laser-projected virtual keyboard, with I-Tech being the specific implementation referenced in this architecture. The keyboard is not physical but projected onto a surface. IR laser and Apple laser keyboards are not the standard specification, while rollup keyboards are physical devices.

Multiple choice technology

Security in Pen PC

  1. Sensors based Lock

  2. Cyber-Electronic Lock

  3. E – Finger Printing

  4. Laser Lock
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The 5 PEN PC incorporates fingerprint-based security through an electronic biometric lock system (E-Fingerprinting). This provides user authentication and device protection suitable for a portable pen device. Sensor-based locks, cyber-electronic locks, and laser locks are not the standard security mechanism for this architecture.

Multiple choice technology

New term

  1. a virtual interface technology

  2. name of the device that projects the keyboard in the 5 PEN PC

  3. company that manufactures 5 PEN PC

  4. another name for 5 PEN PC.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The term '5 PEN PC' refers to a virtual interface technology concept where five pen-like devices combine to form a functional computer system. It is not a company name, specific device name, or keyboard projection technology name, but rather describes a technological approach to pen-based computing.

Multiple choice technology web technology

In mobile computing, PPI refer to

  1. Points per inch

  2. Pixels per inch

  3. All of Above

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

PPI in mobile computing stands for 'Pixels Per Inch', which measures screen resolution and display density. 'Points per inch' is a typesetting term. PPI affects how sharp text and images appear on mobile device screens.

Multiple choice technology web technology

Each Mobile device supports one or more inputs methods.

  1. Numeric Keypad

  2. Touch

  3. QWERTY Keypad

  4. All of above

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

Mobile devices support multiple input methods including touchscreens (most common), numeric keypads (feature phones, dialers), and QWERTY keypads (physical or virtual keyboards). The 'All of above' option correctly reflects this variety.

Multiple choice technology web technology

Touch devices typically have a higher resolution than devices with a keyboard because no space needs to be reserved for the keypad.

  1. True

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

Resolution refers to pixel density (PPI) or total pixels, not screen area. Touch devices can use more device footprint for the screen without a physical keyboard, but this does not inherently mean higher resolution. Many keyboard-equipped devices have high-resolution displays. Screen real estate and display resolution are distinct concepts.

Multiple choice technology web technology

Which of the following is false about Emulators? a. Can receive or dial phone calls from real world cellular network b. Useful to distribute and sell device application c. Environment for debugging and testing code d. Provides a look and feel of physical device within PC environment Select the most appropriate sequence below -

  1. a & b above

  2. a, b & d above

  3. c & d above

  4. b, c & d above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mobile device emulators run on PCs and provide a simulated environment for testing mobile applications. Statement (a) is FALSE because emulators cannot make or receive real cellular network calls - they simulate the device environment, not the network connection. Statement (b) is also FALSE because emulators are development/testing tools, not distribution platforms for selling applications. Since the question asks which statement is 'false' and groups a & b together, option A (a & b above) is correct because both statements are indeed false.

Multiple choice

Can we create our own keyboard, if the device is not rooted?

  1. Yes

  2. No

  3. Don’t know

  4. Not applicable
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Android allows creating custom keyboards (Input Method Editors) without root access. You implement the InputMethodService and declare it in your manifest. The user must explicitly enable your keyboard in system settings, which is a security feature but doesn't require root.

Multiple choice

Which port is required to connect display with motherboard?

  1. PS/2

  2. Display port

  3. LPT1

  4. LAN port
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

DisplayPort is the digital display interface used to connect a monitor or display to the motherboard's graphics output. PS/2 is for older keyboards/mice, LPT1 is a parallel printer port, and LAN port is for network connections - none of these carry video signals to displays.

Multiple choice

If screen shows the message: 'Press F1', it means

  1. Monitor connection is loosed.

  2. SMPS gives less power.

  3. Keyboard is not connected.

  4. Monitor is not connected.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When the screen shows 'Press F1', it typically indicates the keyboard is not properly connected or recognized by the computer. The F1 key is a standard function key on keyboards, and this error appears during POST (Power-On Self-Test) when the system can't communicate with the keyboard.