SSC CGL Mock – Computer Knowledge Tests 1–5 – Test 3 · Exam level

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SSC CGL Mock – Computer Knowledge Tests 1–5 – Test 3 · Exam level – 20 questions, subject: Full Mock Tests. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
CalculationA computer has 17 address lines. How many memory locations can it address?

Correct Answer: B [1,31,072]

Explanation:

n address lines address 2ⁿ locations: 2 17 = 1,31,072.

2.  
Which processor design uses a small set of simple instructions, as in ARM processors?

Correct Answer: A [RISC]

Explanation:

RISC = Reduced Instruction Set Computer (e.g.

3.  
A signal from a device that asks the CPU for its immediate attention is called

Correct Answer: B [an interrupt]

Explanation:

An interrupt makes the CPU pause its current work and attend to the device.

4.  
CalculationA QHD monitor shows 2560 × 1440 pixels. How many pixels is that in all?

Correct Answer: C [36,86,400]

Explanation:

2560 × 1440 = 36,86,400 pixels (about 3.7 million).

5.  
Situation-basedA railway ticket kiosk shows menus on its screen and takes the passenger's choice when the screen is tapped. Here the touch screen works as

Correct Answer: D [both an input and an output device]

Explanation:

It displays information (output) and senses touch (input).

6.  
Which type of memory stores each bit in a tiny capacitor and therefore needs regular refreshing?

Correct Answer: D [DRAM]

Explanation:

DRAM (dynamic RAM) must be refreshed; SRAM uses flip-flops and needs no refresh, so it is used for cache.

7.  
Situation-basedA shop takes a full backup every Sunday. On each later day of the week it copies every file that has changed since that Sunday's full backup. What type of daily backup is this?

Correct Answer: C [Differential backup]

Explanation:

Everything changed since the last FULL backup = differential; an incremental copies only the changes since the previous backup of any type.

8.  
Arrange in orderArrange by typical storage capacity, smallest first:
P. DVD (single layer) Q. CD R. Blu-ray (single layer) S. 3.5-inch floppy disk

Correct Answer: A [S → Q → P → R]

Explanation:

Floppy 1.44 MB < CD 700 MB < DVD 4.7 GB < Blu-ray 25 GB: S → Q → P → R.

9.  
In Windows, pressing Ctrl + Shift + Esc opens

Correct Answer: B [Task Manager]

Explanation:

Ctrl + Shift + Esc = Task Manager; Ctrl + Esc = Start, Win + R = Run, Alt + F4 = close window.

10.  
You select a file in File Explorer and press Alt + Enter. What appears?

Correct Answer: B [The file's Properties window]

Explanation:

Alt + Enter shows Properties; F2 renames; Delete sends to the Recycle Bin.

11.  
You typed a heading in small letters in MS Word. Which keys cycle the selected text through lowercase, UPPERCASE and Capitalised forms without retyping?

Correct Answer: A [Shift + F3]

Explanation:

Shift + F3 changes case; Shift + F7 = Thesaurus, F12 = Save As, Ctrl + Shift + D = double underline.

12.  
Formula outputCells A1 to A5 of an Excel sheet hold 28, 29, 17, 54 and 53. What does =MAX(A1:A5)-MIN(A1:A5) return?

Correct Answer: D [37]

Explanation:

MAX = 54, MIN = 17; 54 − 17 = 37.

13.  
Formula outputA shopkeeper keeps the tax rate in B2 and prices in column C. D3 has =$B$2*C3, and she fills it down to D4. What does D4 contain?

Correct Answer: C [=$B$2*C4]

Explanation:

$B$2 is absolute and stays fixed; C3 is relative and moves one row down: =$B$2*C4 .

14.  
Which PowerPoint ribbon tab do you use to set the effect that plays as one slide changes to the next?

Correct Answer: C [Transitions]

Explanation:

Slide-to-slide effects are transitions (Transitions tab); effects on one object are animations (Animations tab).

15.  
Which e-mail protocol keeps messages on the server and keeps them in sync on your phone and laptop?

Correct Answer: A [IMAP]

Explanation:

IMAP keeps mail on the server, synchronised; POP3 usually downloads it to one device.

16.  
What does DNS do on the internet?

Correct Answer: B [Translates domain names into IP addresses]

Explanation:

DNS (Domain Name System) turns a name such as example.com into an IP address; automatic addressing is DHCP's job.

17.  
A hub differs from a switch because a hub

Correct Answer: D [sends incoming data out of every port]

Explanation:

A hub repeats every frame to all ports; a switch learns MAC addresses and forwards only to the right port.

18.  
When you open a website whose address starts with https://, the browser connects by default to which port?

Correct Answer: C [443]

Explanation:

HTTPS 443, HTTP 80, SMTP 25, FTP 21.

19.  
The best protection against losing your files to ransomware is

Correct Answer: A [keeping regular offline backups]

Explanation:

Ransomware encrypts files and demands payment; an offline backup lets you restore them without paying.

20.  
Two-factor authentication means logging in with

Correct Answer: B [two different kinds of proof, such as a password and an OTP]

Explanation:

2FA combines two factors – something you know (password) and something you have (phone/OTP) or are (fingerprint).

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