A consumer wants to add a hard drive to their computer to store video from their camera. Which of the following is the storage capacity of a modern hard disk drive (HDD) purchased from a computer store?

• 1,024 kilobytes

• 4 gigabytes

• 3 terabytes

• 8 megabytes

Answer explanation

Storage of modern hard disk drives are available in multiples of terabytes.

2.3.4 Digital Information Facts

Which of the following is the binary number equivalent of the hexadecimal number F5C8?

• 1101001110111001

• 1101000110100100

• 1111010111001000

• 1010010011010001

Answer explanation

1111010111001000 is the correct conversion of the hexadecimal number to binary. You can calculate the conversion by breaking down the hexadecimal number's four individual characters (5, F, 8, and C) and then converting each individual character into its hexadecimal equivalent (F = 1111, 5 = 0101, C = 1100, and 8 = 1000).

2.3.1 Number Systems

2.3.2 Number System Facts

Which option should you use to respond to every single person included on an email?

• Reply All

• CC

• Reply

• Forward

Answer explanation

Reply All sends a message to the original author of an email, as well as all other recipients.

Diane is in the market for a new computer; she is part of a mobile sales team. She needs a computer that is very portable, can be used to give presentations, and is able to remotely connect to her main office to pull important sales reports. What is a good computer choice for Diane?

• A tablet

• An all-in-one desktop

• A full desktop

• A laptop

Answer explanation

A laptop is the best choice in this scenario. It has the power of a full-sized desktop with the portability she needs.

Which of the following CPU types does Nvidia's Tegra fall under?

• Xeon

• Zen

• Core

• ARM

Answer explanation

Nvidia's Tegra CPU is an example of an ARM CPU.

ARM CPUs are used with mobile devices.

3.3.5 CPU Types

Which of the following are basic architectural components of a relational database? (Select three.)

• Fields

• Tables

• Constraints

• Records

• Primary keys

Answer explanation

A relational database is highly structured. It has information organized into tables with several fields (represented by columns) and records (rows) that include each field in a column.

7.2.4 Database Management Systems

7.2.5 Database Management System Facts

Sam has installed a new software game onto his computer. He reads on the internet that if he updates his video card driver software, the game will perform better. He installs the latest driver for his video card, but after installing the driver, it causes other problems on his computer. What is the simplest way Sam can fix this issue?

• Use the Roll Back Driver button in his video cards properties.

• Uninstall the driver manually.

• Perform a firmware update to his video card.

• Delete the new game.

Answer explanation

The simplest way to fix this issue is to roll back the driver to the original driver.

4.3.3 Update Drivers

Which type of RAM runs at the same clock speed as the CPU and data bus?

• Static RAM

• SDRAM

• Flash memory

• DRAM

Answer explanation

SDRAM stands for synchronous dynamic random access memory. Synchronous means in sync, which in this case means the RAM and CPU are synchronized together.

DRAM is the original dynamic RAM. It does not run at the same rate as the CPU and data bus.

Static RAM is an older type of RAM. This type of RAM was usually soldered onto the motherboard.

Flash memory is used for non-volatile storage, not short-term storage.

3.5.1 Storage Types

3.5.2 Storage Facts

A database administrator is setting up a new table that will contain customer information. The fields include name, address, company, phone, email, and customer ID. The administrator is using the customer ID to uniquely identify each customer record. Which of the following BEST describes the customer ID field?

• Foreign key

• Private key

• Primary key

• Public key

Answer explanation

Most records in a database require a way to distinguish them from other records. This unique identifier is called a primary key

7.3.1 Relational Databases

7.3.2 Relational Database Facts

Classes contain properties, which are the attributes or characteristics that objects can hold as fields or private variables.

Which of the following is TRUE about properties?

• Methods are used to read or write properties.

• Properties in a class do not actually have the ability to store data in the fields or private variables.

• The properties are read-only, so there is no need to access them publicly.

• Other programs can access and change properties directly.

Answer explanation

Classes contain properties, which are the attributes or characteristics that objects can hold as fields or private variables that other programs cannot changed or access directly. Properties can be used as another way to access a field publicly. Methods are typically used to set (write) or get (read) properties.

8.2.2 Programming Terminology

8.4.2 Object-Oriented Programming