Umar Draz, Author at DocMCQs

How many vertebrae are there in the adult human body (counting fused bones as in adult anatomy)?

A. 33

B. 24

C. 22

D. 20

Correct answer is: A. 33

There are 33 vertebrae in the adult human body, though these are grouped into 5 regions and include 5 fused sacral and 4 fused coccygeal vertebrae. The total counts include 7 cervical (neck), 12 thoracic (chest), 5 lumbar (lower back), 5 sacral (fused), and 4 coccygeal (fused).
Breakdown of Vertebrae
Cervical Vertebrae: 7
Thoracic Vertebrae: 12
Lumbar Vertebrae: 5
Sacral Vertebrae: 5 (fused)
Coccygeal Vertebrae: 4 (fused, forming the coccyx or tailbone)
Total: 7 + 12 + 5 + 5 + 4 = 33

What is the function of the Ctrl + C shortcut key?

A. Paste

B. Copy

C. Cut

D. Save

Correct answer is: B. Copy

Ctrl + C copies the selected item to the clipboard.

Which of the following is an open-source operating system?

A. Windows

B. macOS

C. Linux

D. macOS (duplicate)

Correct answer is: C. Linux

Linux distributions are open-source operating systems.

Which is the most commonly used search engine?

A. Yahoo

B. Bing

C. Google

D. DuckDuckGo

Correct answer is: C. Google

Google is the most widely used web search engine globally.

What is the shortcut key to insert a hyperlink in many editors (e.g., Word, web editors)?

A. Ctrl+H

B. Ctrl+P

C. Ctrl+K

D. Ctrl+L

Correct answer is: C. Ctrl+K

Ctrl + K is the common shortcut to insert/edit hyperlinks in many apps/editors.

What is the smallest unit of memory in a computer?

A. Bit

B. Word

C. Nibble

D. Byte

Correct answer is: A. Bit

A bit (binary digit: 0 or 1) is the smallest unit of data in computing.

Which of the following is a popular cloud storage service?

A. Google Mail (Gmail)

B. Dropbox

C. Chrome

D. Google Drive

Correct answer is: B. Dropbox

Dropbox (and Google Drive, OneDrive etc.) are popular cloud storage services (Dropbox is a classic example).

If X = 80% of Y and Z = 120% of X, the ratio X : Y : Z is:

A. 10:26:30

B. 10:15:20

C. 20:25:24

D. 10:25:23

Correct answer is: C. 20:25:24

Given X = 0.8Y and Z = 1.2X ⇒ X:Y:Z = 0.8Y:Y:0.96Y ⇒ multiply by 25 ⇒ 20:25:24 (solution shown in your notes).

A number multiplied by 3/4 of itself gives 10800. The number is:

A. 100

B. 120

C. 150

D. 200

Correct answer is: B. 120

Let number = x → x*(3/4)x = 10800 ⇒ (3/4)x² =10800 ⇒ x² =14400 ⇒ x = 120.

A cube has edge 18 cm. How many smaller cubes of edge 3 cm can be cut from it?

A. 216

B. 81

C. 64

D. 144

Correct answer is: A. 216

Each side: 18/3 = 6 small cubes per edge → total = 6³ = 216.

Author name: Umar Draz