Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

The breaking down of the incoming radiation into a spectrum of its parts is which of the following?

  1. Interferometry

  2. Spectroscopy

  3. Adaptive Optics

  4. Absorption Line
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Spectroscopy is the technique of breaking down electromagnetic radiation into its component wavelengths to analyze the composition and properties of matter. Interferometry uses wave interference patterns, adaptive optics corrects atmospheric distortion, and absorption lines are dark features within spectra.

Multiple choice general knowledge science & technology

When a magnetic needle is placed at a neutral point, it turns

  1. Vertical

  2. Horizontal

  3. At an angle greater than 90 degree

  4. At an angle smaller than 90 degree
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

At a neutral point, the horizontal components of the Earth's magnetic field and any other magnetic fields cancel out completely. Only the vertical component of the Earth's magnetic field remains, causing the needle to align vertically.

Multiple choice general knowledge science & technology

The smallest functional and structural unit of kidney is called as -

  1. Neuron

  2. Nephron

  3. Granulocyte

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

The nephron is the microscopic functional unit of the kidney, responsible for filtering blood and producing urine. Each kidney contains approximately one million nephrons. Neurons transmit nerve signals, granulocytes are white blood cells, and reticulocytes are immature red blood cells.

Multiple choice general knowledge science & technology

Chinese researches have recently discovered the fossils of a flying dinosaur with four wings, which can be an important missing link in the evolution of dinosaurs. It is named as-

  1. Tyrannosaurus rex

  2. Tyrannosaurus knowlesi

  3. Archeopteryx

  4. Anchiornis huxleyi
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Anchiornis huxleyi is a four-winged dinosaur discovered in China that provides crucial evidence for the evolution of birds from dinosaurs. It had long feathers on both its arms and legs. Tyrannosaurus rex was a large theropod without wings. Archaeopteryx was discovered in Germany, not China. Tyrannosaurus knowlesi is not a valid species name.

Multiple choice general knowledge science & technology

#define str "TCS" ## "Hyd" main() { printf(str); }

  1. compilation error

  2. TCS Hyd

  3. runtime error

  4. non of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The preprocessor concatenates 'TCS' and 'Hyd' into a single string literal 'TCS Hyd'. The ## operator performs token pasting during preprocessing, before compilation. This is valid preprocessor syntax that results in a single string that printf will output correctly. There's no compilation or runtime error - the code works as intended.

Multiple choice general knowledge science & technology

variable names: 1.a n 2.a_n 3.a#n 4.5a 5.a5 6.integer 7.double which of them are not valid variable names as per any c compiler?

  1. 1 3 4 6

  2. 1 3 4 6 7

  3. 2 4 6

  4. 1 3 4 7
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

C variable names must start with a letter or underscore, and can only contain letters, digits, and underscores. Invalid names: 1 (starts with digit), 3 (contains #), 4 (starts with digit), 7 (double is a reserved keyword). Valid names: 2 (a_n with underscore), 5 (a5), 6 (integer is not a reserved word in C). Options 1,3,4,7 are all invalid.