Computer Hardware Quiz 2

To solve this question, the user needs to know about the Interrupt Request (IRQ) system and how it applies to the LPT1 (Line Print Terminal 1) port.

LPT1 is a parallel port commonly used for printers and other similar devices. In terms of IRQ, it typically uses IRQ7.

Now, let's go through each option and explain why it is right or wrong:

A. 1: This option is incorrect. IRQ1 is typically used for the keyboard controller.

B. 4: This option is incorrect. IRQ4 is typically used for the serial port COM1.

C. 5: This option is incorrect. IRQ5 is typically used for the sound card.

D. 7: This option is correct. LPT1 commonly uses IRQ7.

E. 8: This option is incorrect. IRQ8 is typically used for the real-time clock.

Therefore, the answer is: D.

On older AT-style motherboards, the P8 and P9 power connectors must be plugged in so that the black (ground) wires of both connectors are adjacent to each other in the center. Reversing them or misaligning them could destroy the motherboard.

AT power supplies use two separate connectors (P8 and P9) that must be plugged in carefully with black grounds together. ATX uses a single P1 connector with 20 or 24 pins. They operate on the same voltage.

SIMM modules come in 30-pin (8-bit) and 72-pin (32-bit) varieties. DIMM uses 168 pins. The other options don't match SIMM specifications.

Parity is a simple error-detection method where an extra bit is added to a group of bits to ensure the total number of set bits is even or odd. This allows the system to detect if a single bit has flipped in RAM.

IRQ 6 is the standard interrupt for the floppy disk controller. COM1 uses IRQ 4. LPT1 uses IRQ 7. Sound cards typically use IRQ 5. The keyboard uses IRQ 1.

A computer system needs input devices to receive data, processing (CPU) to manipulate it, output devices to present results, and storage to retain data and programs. Options B lists specific hardware examples but misses the functional categories. Option C lists application software, not system functions. Options D and E are incomplete or irrelevant.

The Molex connector (specifically the 4-pin peripheral connector) was the standard for powering PATA/IDE hard drives and optical drives. Mini-molex was used for floppy drives, and P9 was part of the AT-style motherboard power connection.

In the standard PC architecture (ISA/Legacy), Interrupt Request (IRQ) 1 is hardwired and dedicated to the keyboard controller. IRQ 0 is used for the system timer, and IRQ 8 is used for the real-time clock.

To solve this question, the user needs to know the storage capacity of a high-density (HD) floppy disk.

Now, let's go through each option and explain why it is right or wrong:

A. 124 KB: This option is incorrect. It is the storage capacity of a single-sided, double-density (DD) floppy disk, not an HD floppy disk.

B. 640 KB: This option is incorrect. It is the storage capacity of a double-sided, double-density (DD) floppy disk, not an HD floppy disk.

C. 720 KB: This option is incorrect. It is the storage capacity of a double-sided, double-density (DD) floppy disk formatted with 9 sectors per track, not an HD floppy disk.

D. 1.44 MB: This option is correct. It is the storage capacity of a double-sided, high-density (HD) floppy disk, which uses smaller magnetic particles to store more data than a DD floppy disk.

E. 2.88MB: This option is incorrect. This is the storage capacity of an extended density (ED) floppy disk, which is not as widely used as HD floppy disks.

Therefore, the correct answer is:

The Answer is: D. 1.44 MB

ESD occurs most easily in cool, dry conditions because low humidity prevents static charges from dissipating, allowing them to build up on surfaces and discharge when contacting sensitive components. Hot, damp conditions actually reduce ESD risk because moisture in the air helps neutralize static charges.

To answer this question, you need to have knowledge about computer hardware and its components, specifically the hard disk controller and IRQ (Interrupt Request) numbers.

IRQ numbers are used by various hardware devices to request attention from the CPU. Each device is assigned a unique IRQ number to ensure proper communication and coordination between the hardware and the CPU.

In the case of the hard disk controller, it commonly uses IRQ 14.

Now let's go through each option and determine if it is the correct answer:

A. 0: This option is incorrect because IRQ 0 is typically used for the system timer.

B. 1: This option is incorrect because IRQ 1 is commonly used for the keyboard controller.

C. 4: This option is incorrect because IRQ 4 is commonly used for the serial port (COM1).

D. 13: This option is incorrect because IRQ 13 is commonly used for the math coprocessor.

E. 14: This option is correct. IRQ 14 is commonly used for the hard disk controller.

Therefore, the correct answer is E.