Explore topic-wise MCQs in Computer Science.

This section includes 290 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Science knowledge and support exam preparation. Choose a topic below to get started.

201.

You are testing the resistance in Ohms of a fuse on a 2 amp systems. If the fuse is good, the meter should read?

A. 2
B. 5
C. 0
D. 0.2
Answer» D. 0.2
202.

COM 4 uses which I/O port?

A. 2F8H
B. 3F8H
C. 3E8H
D. 2E8H
Answer» E.
203.

You just installed a new IDE hard drive, but your system BIOS will not recognize the new drive, what should you check first.

A. cable sequence
B. jumpers on the hard drive
C. drivers that need to be loaded
D. hard drive manufacturer web site information
Answer» C. drivers that need to be loaded
204.

To install a second IDE drive into a computer, you must:

A. Set the master-slave jumper to slave on the second drive
B. Use the IDE configuration software to set the new drive as slave
C. Verify that you define the new drive as D: in the CMOS setup
D. Verify that you attach the drive to the connector at the end of the ribbon cable
Answer» B. Use the IDE configuration software to set the new drive as slave
205.

Whenever you have a hardware resource conflict, it will more likely be an IRQ conflict rather than an i/o conflict because:

A. there are a lot more I/O addresses than IRQs.
B. the BIOS sometimes has more of a problem controlling IRQs
C. I/O addresses cannot conflict
D. software tends to correct I/O conflicts
Answer» B. the BIOS sometimes has more of a problem controlling IRQs
206.

Topically, how many type III PC cards can you insert in a laptop

A. 1
B. 2
C. 3
D. 4
Answer» B. 2
207.

When not in use, it is very important to keep 5 VA diskettes in _____.

A. Their protective sleeves
B. In a plastic bag
C. On a shelf in an upright position
D. In the floppy drive
Answer» B. In a plastic bag
208.

To view any currently running Terminate Stay Resident (TSR's) programs you could type:

A. Memory
B. MEM
C. SYS /M
D. Memmaker
Answer» C. SYS /M
209.

What device prevents power interruptions, resulting in corrupted data?

A. Battery back-up unit
B. Surge protector
C. Multiple SIMMs strips
D. Data guard system
Answer» B. Surge protector
210.

You were installing an application in Windows 95, and the computer crashes, what do you do?

A. press alt + Ctrl + delete, twice
B. press alt + Ctrl + delete, and end task
C. press the reset button on the computer
D. turn off computer and boot from a floppy disk
Answer» E.
211.

The floppy drive uses which DMA (direct memory access) channel?

A. 5
B. 4
C. 1
D. 9
Answer» E.
212.

During boot-up, the memory test:

A. Is a superfluous step that should be ignored
B. Checks and verifies that contiguous memory is installed
C. Is an operational error
D. Displays what memory is installed, but nothing else
Answer» C. Is an operational error
213.

What beep codes could indicate a system board or power supply failure?

A. steady short beep
B. no beep
C. one long continuous beep tone
D. steady long beeps
Answer» E.
214.

When seeking to upgrade for a particular motherboard what do you need to know?

A. memory
B. hard drive
C. make & model
D. dimm
Answer» D. dimm
215.

When installing a SCSI CD-ROM drive, you must set the CD-ROM SCSI adapter to:

A. B0007
B. An unused SCSI address
C. The same address as the SCSI device before the CD-ROM
D. SCSI ID=1
Answer» C. The same address as the SCSI device before the CD-ROM
216.

After doing a low-level format, what would be the next step in configuring the hard drive in a system?

A. Format DOS partition
B. Install operating system
C. Configure DMA channel and back-up interrupt
D. Partition had disk
Answer» B. Install operating system
217.

An important first step in troubleshooting which component in a laser printer is causing a jam is to:

A. note where in the paper path the paper stops
B. check all voltages
C. look up error codes
D. turn the printer off, then on again
Answer» B. check all voltages
218.

Which of the following items would require you t.o comply with EPA disposal guidelines?

A. Keyboard
B. System board
C. Power supply
D. Battery
Answer» E.
219.

14.4 modem should transmit _____ bits per second

A. 14,400-15,000
B. 140-150
C. 1400-1500
D. 140,000-150,000
Answer» B. 140-150
220.

What component would most likely cause a "parity error"?

A. bad hard disk
B. bad controller
C. bad RAM
D. bad software
Answer» D. bad software
221.

How many devices can be used on a single SCSI bus? Keep in mind that the SCSI host adapter counts as a device.

A. 1
B. 8
C. 20
D. 10
Answer» C. 20
222.

IDE cables have how many pins?

A. 25
B. 50
C. 100
D. 40
Answer» E.
223.

What tool is used to test serial and parallel ports?

A. high volt probe
B. cable scanner
C. loop backs (wrap plugs)
D. sniffer
Answer» D. sniffer
224.

In inkjet printers, what is the most common problem with the paper tray?

A. inconsistent printing
B. malfunctioning pick-up rollers
C. misalignment of the sheet feeder
D. paper jamming on the ink cartridge
Answer» C. misalignment of the sheet feeder
225.

What is the main communication method from one PDA to another PDA?

A. IR
B. USB
C. RS-232
D. IEEE 1394
Answer» B. USB
226.

Which provides the fastest access to large video files?

A. Optical drives
B. IDE hard drives
C. SCSI hard drives
D. EIDE hard drives
Answer» D. EIDE hard drives
227.

Which best describes a fragmented hard drive:

A. The platters are bad
B. Data files are corrupted
C. Clusters of data are damaged
D. Files are not stored in consecutive clusters
Answer» E.
228.

A 25-pin female connector on the back of your computer will typically be:

A. Serial port 1
B. A parallel port
C. Docking
D. COM2 port
Answer» C. Docking
229.

A sound card typically uses which IRQ?

A. 6
B. 5
C. 15
D. 1
Answer» C. 15
230.

What's the best way to prevent damaging your PC with static electricity?

A. place your PC on a rubber mat
B. wear leather soled shoes
C. periodically touch a safe ground point on the PC to discharge yourself
D. static electricity doesn't really hurt a PC
Answer» E.
231.

_____ help prevent power surges.

A. Surge suppressor
B. Spike protector
C. UPS system
D. High-grade multi-meter
Answer» B. Spike protector
232.

After you service a laser printer, you notice dirty print. Which of the following would correct the problem?

A. Clean the developer tank
B. Reset the printer
C. Run several blank pages
D. Clean the laser diode
Answer» D. Clean the laser diode
233.

How can you totally protect a PC from damage during an electrical storm?

A. Disconnect the AC power cable
B. Disconnect all external cables and power cords
C. Use a surge protector
D. Turn off the AC power
Answer» B. Disconnect all external cables and power cords
234.

After you service a laser printer, you notice dirty print. Which of the following would correct the problem.

A. Clean the developer tank
B. Reset the printer
C. Run several blank pages
D. Clean the laser diode
Answer» D. Clean the laser diode
235.

A workstation has just been installed on an Ethernet LAN, but cannot communicate with the network. What should you check first?

A. reinstall the network protocols
B. reinstall the network interface card driver
C. verify the ip configuration on the workstation
D. verify the link status on the computer's network card
Answer» E.
236.

Which of the following FRUs would be considered both an input/output device?

A. Video board
B. SCSI host adapter
C. System board CPU
D. All of the above
Answer» C. System board CPU
237.

Voltage is measured:

A. in parallel
B. in series
C. after breaking the circuit
D. after checking resistance
Answer» B. in series
238.

You have just installed a new internal PCI modem on you desktop. It will not dial out. what is the problem?

A. The port speed is set too high
B. the modem has not been set up in control panel properties
C. the phone line is plugged into the line-in port on the modem card
D. the phone line out of the wall is plugged into the phone port on the modem card
Answer» E.
239.

What are the IRQ's for sound card?

A. IRQ8
B. IRQ4
C. IRQ5
D. IRQ7
Answer» D. IRQ7
240.

In which mode can two or more applications be stored in memory at the same time?

A. Segmented Mode
B. Unprotected Mode
C. Real Mode
D. Protected Mode
Answer» E.
241.

Which peripheral port provides the FASTEST throughput to laser printers?

A. RS-232
B. SCSI
C. Parallel
D. Serial
Answer» D. Serial
242.

What voltage does a Pentium system use?

A. +12 volts
B. + 5 volts
C. + 8 volts
D. +3.3 volts
Answer» E.
243.

Which type of system board is the MOST likely candidate for processor upgrading if you want maximum performance and future compatibility?

A. ML
B. PCI
C. ISA
D. EISA
Answer» C. ISA
244.

Your CD-ROM audio cable connects to the:

A. speaker
B. sound card (or motherboard if sound is integrated with it)
C. power supply
D. hard drive
Answer» C. power supply
245.

A 6xx indicates a problem with the:

A. floppy drive
B. hard drive
C. keyboard
D. CD ROM
Answer» B. hard drive
246.

What is the result of adding an IP address to the DNS server search order

A. It restricts browsing to that DNS server
B. It overrides the local systems IP address
C. It tells the DNS Server where the local system is located
D. It tells the local system where the DNS Server is located
Answer» E.
247.

ESD would cause the most damage to which component?

A. Power supply
B. Expansion board
C. Monitor
D. Keyboard
Answer» C. Monitor
248.

IBM's Micro Channel Architecture (MCA) specifies which type of the following bit access widths?

A. 8 bit & 16 bit
B. 16 bit & 24 bit
C. 16 bit & 32 bit
D. 32 bit & 64 bit
Answer» D. 32 bit & 64 bit
249.

During preventative maintenance on a dot matrix printer, do NOT lubricate:

A. Platen assembly
B. Print head pulley
C. Print head pins
D. Paper advance gear bushings
Answer» D. Paper advance gear bushings
250.

RS-232 is a standard that applies to:

A. serial ports
B. parallel ports
C. game ports
D. networks
Answer» B. parallel ports