Which binary sum is correct for 101010 (42) + 11011 (27)?

• 1100111 (103)

• 1000011 (67)

• 1001011 (75)

• 1111011 (123)

A user tries to store IPv4 addresses in an INT field. Which might fail?

• IPv4 uses only decimal digits

• Some IPs exceed the max INT if stored as one integer, e.g., 4294967295

• IP addresses are always ASCII

• Databases never handle IP data

UTF-8 retains compatibility with:

• Extended ASCII only

• 7-bit ASCII for common characters

• Hex code pages

• BIOS strings

A user connects an RJ-45 cable to a phone port. Why might it not work?

• RJ-45 matches telephone lines

• RJ-11 cable is for Ethernet

• Pinouts differ; phone = RJ-11, not standard Ethernet

• 8-pin vs. 10-pin mismatch

A user’s GPU is integrated on the CPU die. This design is known as:

• Discrete GPU architecture

• SoC (System on a Chip) or APU approach

• Legacy PCI bridging

• No concurrency

A malicious site uses cross-site scripting to steal sessions. Which best counters this?

• Client-side caching

• Input sanitization and proper web app security

• DNS blacklisting only

• Full disk encryption

The hexadecimal number 0xFF00 is what in decimal?

• 65280

• 255

• 65535

• 4080

Non-repudiation in e-commerce is commonly provided by:

• Clear-text passwords

• Digital signatures and transaction logs

• Public domain data

• Removing all receipts

A program frequently crashes with a segmentation fault. This suggests:

• Improper memory access (out-of-bounds)

• CPU meltdown

• GPU driver mismatch

• OS patch error

NFC (Near Field Communication) typically has a range of:

• ~10 meters

• A few centimeters

• 1 kilometer

• 2.4 GHz up to 50m