Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

How do digital phones let more people within a cell talk at once?

  1. They transfer data quicker, so the frequencies aren't clogged.

  2. They convert voices into binary code, compressing the calls.

  3. They use higher frequencies than analog phones.

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

Digital phones convert voice signals into binary code (1s and 0s) using compression algorithms like vocoders. This digital compression allows multiple calls to be transmitted simultaneously on the same frequency through techniques like TDMA or CDMA, unlike analog phones that require dedicated frequencies.

Multiple choice general knowledge science & technology

Cell phone cloning involves:

  1. buying a phone and using someone else's account information to set it up

  2. retrieving ID numbers from a phone and using them to eavesdrop or make fraudulent calls

  3. transferring a SIM chip from an old phone to a new phone

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

Cell phone cloning is a fraud technique where criminals copy the electronic serial number (ESN) and mobile identification number (MIN) from a legitimate phone. These stolen identifiers are then programmed into another phone to make calls that are billed to the victim's account.

Multiple choice general knowledge science & technology

Cell phones use lower-power radio signals because:

  1. The signals don't travel very far.

  2. Sending a signal doesn't drain the battery.

  3. Both 1 and 2.

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

Cell phones use low-power signals because cell towers are positioned close together (signals don't need to travel far), and this design conserves battery life since transmitting weaker signals consumes less power. High-power transmission would quickly drain the battery and cause interference between nearby cells.

Multiple choice general knowledge science & technology

A locked phone:

  1. can work with only one specific provider's service

  2. can work only in a limited range within a network

  3. has no SIM card

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

A locked phone is restricted by software to work only with the specific carrier that sold it, typically through a SIM lock or network lock. This prevents the phone from accepting SIM cards from other providers, ensuring the carrier recovers their subsidy on the device.

Multiple choice general knowledge science & technology

Steve Jobs initially worked at a games-maker before joining forces with Wozniak to create Apple. A well-known stroy goes how, Jobs unfairly split the money he got from a hardware project in this company, with Wozniak who actually did all the work. Which was this company?

  1. Eidos Interactive

  2. Electronic Arts

  3. Atari

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

Steve Jobs worked at Atari before founding Apple. He was assigned to create a circuit board for the game Breakout, and recruited Steve Wozniak to do the actual engineering work. Jobs received $5000 for the project but only paid Wozniak $350, keeping the majority despite Wozniak doing all the work.

Multiple choice general knowledge science & technology

The name of Steve Jobs' first daughter will remain in the minds of computer historians and enthusiasts forever as the biggest flop ever created by Apple. Steve Jobs vehemently denied fatherhood of this daughter, who he later becmae close to. What's her name?

  1. Lisa

  2. Mary

  3. Apple III

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

Lisa Brennan-Jobs is Steve Jobs' first daughter, born in 1978. Jobs initially denied paternity but later developed a relationship with her. The Apple Lisa computer (a commercial flop) was named after her. Mary, Apple III, and Newton are incorrect - Mary is not related to Jobs' daughter, while Apple III and Newton were Apple products, not people.

Multiple choice general knowledge science & technology

Which disease is caused in children due to deficiency of calcium and phosphorous?

  1. Measles

  2. Rickets

  3. Rabies

  4. Chicken pox
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rickets develops in children due to insufficient vitamin D, calcium, and phosphate, causing soft and weak bones. Measles is a viral infection. Rabies is a viral disease from animal bites. Chicken pox is a viral infection from the varicella-zoster virus.

Multiple choice general knowledge science & technology

Insufficient amount of niacin results in which disease?

  1. Pellagra

  2. Ariboflavinosis

  3. Haemophilia

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

Pellagra is the classic disease of niacin (vitamin B3) deficiency, characterized by the '3 Ds': diarrhea, dermatitis, and dementia. Ariboflavinosis is caused by riboflavin (B2) deficiency, while haemophilia is a genetic bleeding disorder unrelated to vitamin deficiencies. Pneumonia is an infectious disease.

Multiple choice general knowledge science & technology

In this disease, a person cannot distinguish between red, green and blue colours.

  1. Blindness

  2. Colour Blindness

  3. X-Chromosome

  4. Y-Chromosome
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Colour blindness is the correct condition where a person has difficulty distinguishing between certain colors, most commonly red and green (though blue-yellow color blindness exists). Blindness means complete inability to see, while X and Y chromosomes are genetic structures, not diseases.