Mock Exam 90

Question 1

What is the purpose of airplane mode on mobile devices?

Answer 1

Disables wireless communication including cellular, Wi-Fi, and Bluetooth.

Question 2

What is the most common type of mobile device battery?

Answer 2

Lithium-ion (Li-ion).

Question 3

What is the function of a gyroscope in a smartphone?

Answer 3

Detects orientation and supports motion-based features.

Question 4

What is the difference between IMEI and IMSI?

Answer 4

IMEI identifies the device, IMSI identifies the subscriber.

Question 5

What is the purpose of a SIM card in a mobile phone?

Answer 5

Stores subscriber information and enables cellular communication.

Question 6

What is the purpose of DHCP?

Answer 6

Dynamically assigns IP addresses to devices on a network.

Question 7

What is the range of private IP addresses for Class A networks?

Answer 7

10.0.0.0 to 10.255.255.255.

Question 8

What does DNS stand for, and what is its purpose?

Answer 8

Domain Name System; translates domain names into IP addresses.

Question 9

What is the function of a subnet mask?

Answer 9

Defines the network and host portions of an IP address.

Question 10

What is the maximum speed of Cat6 Ethernet cable?

Answer 10

10 Gbps over short distances.

Question 11

What is the primary function of a motherboard?

Answer 11

To connect and allow communication between computer components.

Question 12

What is the purpose of thermal paste?

Answer 12

Improves heat transfer between the CPU and the heatsink.

Question 13

What type of memory is used in laptops?

Answer 13

SO-DIMM (Small Outline Dual In-line Memory Module).

Question 14

What is the function of a power supply unit (PSU)?

Answer 14

Converts AC power to DC power for the computer.

Question 15

What is the difference between HDD and SSD?

Answer 15

HDD uses spinning disks; SSD uses flash memory for faster performance.

Question 16

What is the primary purpose of virtualization?

Answer 16

To run multiple operating systems on a single physical machine.

Question 17

What is IaaS in cloud computing?

Answer 17

Infrastructure as a Service; provides virtualized computing resources.

Question 18

What is the difference between private and public clouds?

Answer 18

Private clouds are dedicated to one organization; public clouds are shared among multiple users.

Question 19

What is the purpose of a hypervisor?

Answer 19

Manages virtual machines on a host system.

Question 20

What is the main advantage of cloud storage?

Answer 20

Access files from any device with internet connectivity.

Question 21

What should you do if a laptop screen is dim?

Answer 21

Check the brightness settings and test the display with an external monitor.

Question 22

What is a common cause of a paper jam in printers?

Answer 22

Misaligned or overloaded paper in the tray.

Question 23

What does the ping command test?

Answer 23

Connectivity to a specific IP address or hostname.

Question 24

What tool is used to test the functionality of Ethernet cables?

Answer 24

Cable tester or continuity tester.

Question 25

What is the purpose of Safe Mode in Windows?

Answer 25

Boots the system with minimal drivers to troubleshoot issues.

Question 26

What is the function of a firewall?

Answer 26

Monitors and controls incoming and outgoing network traffic.

Question 27

What is the purpose of two-factor authentication?

Answer 27

Enhances security by requiring two forms of verification.

Question 28

What is a strong password policy?

Answer 28

Includes uppercase, lowercase, numbers, and special characters.

Question 29

What does antivirus software do?

Answer 29

Detects and removes malware from a system.

Question 30

What is the purpose of file permissions?

Answer 30

Restricts access to files and directories based on user roles.

Question 31

What is the function of the task manager in Windows?

Answer 31

Monitors running processes and system performance.

Question 32

What is the purpose of a system restore?

Answer 32

Reverts the computer to a previous state to fix issues.

Question 33

What does the command ipconfig display?

Answer 33

Shows IP address configuration on a Windows system.

Question 34

What is the difference between FAT32 and NTFS file systems?

Answer 34

NTFS supports larger files and permissions; FAT32 does not.

Question 35

What is the purpose of a recovery partition?

Answer 35

Contains tools to restore the system to factory settings.

Question 36

What is a common cause of slow application performance?

Answer 36

Low system resources such as RAM or CPU usage.

Question 37

What should you do if a program is unresponsive?

Answer 37

Force close it using Task Manager and restart it.

Question 38

What is the purpose of application logs?

Answer 38

Records information about application events and errors.

Question 39

What should you check if a system cannot connect to the internet?

Answer 39

Verify network settings and test with another device.

Question 40

What does the term 'blue screen of death' (BSOD) refer to?

Answer 40

A critical Windows error that requires a system restart.

Question 41

What is the maximum length for a USB cable before signal loss?

Answer 41

5 meters for USB 2.0.

Question 42

What type of connector is used for Thunderbolt 3?

Answer 42

USB-C connector.

Question 43

What is the purpose of a UPS?

Answer 43

Provides backup power during electrical outages.

Question 44

What is the maximum resolution supported by HDMI 2.1?

Answer 44

Up to 10K resolution.

Question 45

What is the difference between single-mode and multimode fiber optic cables?

Answer 45

Single-mode is for long distances; multimode is for short distances.

Question 46

What is the role of a patch panel in networking?

Answer 46

Organizes and connects network cables in a central location.

Question 47

What is the default gateway in networking?

Answer 47

The device that routes traffic from a local network to other networks.

Question 48

What is the purpose of a NAS device?

Answer 48

Provides network-attached storage for file sharing.

Question 49

What does the tracert command do?

Answer 49

Shows the path packets take to a destination.

Question 50

What is the function of the POST process during boot?

Answer 50

Performs hardware checks before loading the operating system.